Abstract: A visible light communication device includes: a light emitting device that emits visible light when current flows thereto; a power supply circuit that supplies the current that flows to the light emitting device; a switch that switches between ON and OFF states in which current does and does not flow to the light emitting device, respectively; a switch controller that controls the switch state; a voltage detector that detects an input voltage of the light emitting device; a threshold storage that stores information stipulating a threshold voltage; and a determiner that, when the switch is in the ON state and the voltage detector detects an ON voltage, determines whether the ON voltage satisfies a predetermined relationship with the threshold voltage stipulated by the information stored in the threshold storage. The switch controller further latches the switch in the OFF state when the determination by the determiner is affirmative.

Abstract: In one embodiment, a laser system includes a seed laser diode configured to produce a free-space seed-laser beam and a seed-laser lens configured to collimate the seed-laser beam. The laser system also includes a pump laser diode configured to produce a free-space pump-laser beam and a pump-laser lens configured to collimate the pump-laser beam. The laser system further includes an optical-beam combiner configured to combine the collimated seed-laser and pump-laser beams into a combined free-space beam and a focusing lens configured to focus the combined beam. The laser system also includes an optical gain fiber that includes an input end configured to receive the focused beam. The laser system also includes a mounting platform, where one or more of the seed laser, the seed-laser lens, the pump laser, the pump-laser lens, the combiner, the focusing lens, and the input end of the gain fiber are mechanically attached to the platform.

Abstract: Light with a short pulse width is emitted using a simple structure. A light source 101, a differentiation circuit 102, and a switch 103 are connected in series. When the switch 103 is switched on, inrush current flows in a capacitor 102b forming the differentiation circuit 102, and accordingly the light source 101 is supplied with electric current and thereby emits light. When the capacitor 102b is charged, electric current flows in a resistor 102a, and voltage drops at the resistor 102a. Then, the voltage applied to the light source 101 is decreased, whereby the light source 101 stops emitting light. By using the inrush current at the capacitor 102b, light with a short pulse width can be generated.

Abstract: A device includes a u-channel shaped member and a printed circuit board including a plurality of capacitors. Each of the plurality of capacitors has a mounting surface mounted to the printed circuit board and an opposing heat transfer surface thermally coupled to the u-channel shaped member. The device also includes an output cable coupled to the printed circuit board and a return cable coupled to the printed circuit board. The device further includes a control transistor disposed inside the u-channel shaped member and a current sensing resistor disposed inside the u-channel shaped member.

Abstract: An optical amplifier is described. The optical amplifier (1) comprises a semiconductor disk gain medium (2) including at least one quantum well layer (9) and a pump field source (17) for generating an optical pump field (3) for the semiconductor disk gain medium. The optical amplifier acts to generate an output optical field (5) from an input optical field (4) received by the optical amplifier and arranged to be incident upon the semiconductor disk gain medium. Employing a semiconductor disk gain medium within the optical amplifier allows it to be optically pumped and thus provided for increased stability and beam quality of the output optical field while allowing for the design of optical amplifiers which can operate across a broad range of wavelengths. The optical amplifier may be employed with continuous wave or pulsed input optical fields.

Abstract: The invention relates to multi-photon excitation microscopy, and in particular to a path planning module and calibration module for three mirror adaptive sampling system configured to automatically generate an optimized RGG mirror scanning path by scanning a Field of View, identifying multiple region of interest targets, and analyzing the targets to generate an optimized path. The invention also relates to methods for maintaining a high frame rate during wide field of view sampling.

Abstract: A passively mode-locking laser and corresponding method is described. The laser comprises a resonator (2) terminated by first (3) and second (4) mirrors and folded by a third (5) and fourth (6) mirror. The third mirror comprises a reflector (14) surmounted by a multilayer semiconductor gain medium (15) including at least one quantum well layer while the second mirror (4) comprises an intensity saturable mirror. The resonator is configured to provide a cross sectional area of an intra cavity resonating field on the intensity saturable mirror that is greater than or equal to a cross sectional area of the intra cavity resonating field on the multilayer semiconductor gain medium. This arrangement provides a passively mode-locking laser that exhibits increased stability when compared to those systems known in the art.

Abstract: The inventive system for crystallizing an amorphous silicon (a-Si) film is configured with a quasi-continuous wave fiber laser source operative to emit a film irradiating pulsed beam. The fiber laser source is operative to emit a plurality of non-repetitive pulses incident on the a-Si. In particular, the fiber laser is operative to emit multiple discrete packets of film irradiating light at a burst repetition rate (BRR), and a plurality of pulses within each packet emitted at a pulse repetition rate (PRR) which is higher than the BRR. The pulse energy, pulse duration of each pulse and the PRR are controlled so that each packet has a desired packet temporal power profile (W/cm2) and packet energy sufficient to provide transformation of a-Si to polysilicon (p-Si) at each location of the film which is exposed to at least one packets.

Abstract: A semiconductor laser oscillator includes a diode unit configured from a plurality of banks, in which one bank is configured from a plurality of laser diodes connected in series. The diode unit includes a wavelength locking mechanism for locking to a plurality of wavelengths. The semiconductor laser oscillator includes a controller configured to control input currents to the laser diodes of each of the plurality of banks individually in correspondence to a characteristic of a wavelength locking efficiency, and to control an output of the diode unit as a whole to a required output.

Abstract: Provided is a passive Q-switch laser device possessing a power density controller (15) making power density of excitation light from an excitation light source (14) equal to or greater than power density so that delay time required for reaching oscillation after start of excitation of a laser gain medium (12) becomes equal to or shorter than a laser upper energy level lifetime of the laser gain medium (12).

Abstract: A VCSEL array includes a base substrate, a plurality of VCSEL devices and an inter-device line. Each of the plurality of VCSEL devices is disposed on a front side of the base substrate. The inter-device line connects two of the plurality of VCSEL devices that are adjacent to each other, the two VCSEL devices being connected in series such that forward directions of the two VCSEL devices are the same. An insulating groove that electrically insulates the two VCSEL devices is formed on the base substrate.

Abstract: According to exemplary embodiments of the present disclosure, it is possible to provide method, system, arrangement, computer-accessible medium and device to stimulate individual neurons in brain slices in any arbitrary spatio-temporal pattern, using two-photon uncaging of photo-sensitive compounds such as MNI-glutamate and/or RuBi-Glutamate with beam multiplexing. Such exemplary method and device can have single-cell and three-dimensional precision. For example, by sequentially stimulating up to a thousand potential presynaptic neurons, it is possible to generate detailed functional maps of inputs to a cell. In addition, it is possible to combine this exemplary approach with two-photon calcium imaging in an all-optical method to image and manipulate circuit activity. Further exemplary embodiments of the present disclosure can include a light-weight, compact portable device providing for uses in a wide variety of applications.

Abstract: A semiconductor-laser-device assembly includes a mode-locked semiconductor-laser-element assembly including a mode-locked semiconductor laser element, and a dispersion compensation optical system, on which laser light emitted from the mode-locked semiconductor laser element is incident and from which the laser light is emitted; and a semiconductor optical amplifier having a layered structure body including a group III-V nitride-based semiconductor layer, the semiconductor optical amplifier configured to amplify the laser light emitted from the mode-locked semiconductor-laser-element assembly.

Abstract: Arrangements and methods are provided for obtaining information associated with an anatomical sample. For example, at least one first electro-magnetic radiation can be provided to the anatomical sample so as to generate at least one acoustic wave in the anatomical sample. At least one second electro-magnetic radiation can be produced based on the acoustic wave. At least one portion of at least one second electro-magnetic radiation can be provided so as to determine information associated with at least one portion of the anatomical sample. In addition, the information based on data associated with the second electro-magnetic radiation can be analyzed. The first electro-magnetic radiation may include at least one first magnitude and at least one first frequency. The second electro-magnetic radiation can include at least one second magnitude and at least one second frequency.

Abstract: A pulse multiplier includes a beam splitter and one or more mirrors. The beam splitter receives a series of input laser pulses and directs part of the energy of each pulse into a ring cavity. After circulating around the ring cavity, part of the pulse energy leaves the ring cavity through the beam splitter and part of the energy is recirculated. By selecting the ring cavity optical path length, the repetition rate of an output series of laser pulses can be made to be a multiple of the input repetition rate. The relative energies of the output pulses can be controlled by choosing the transmission and reflection coefficients of the beam splitter. This pulse multiplier can inexpensively reduce the peak power per pulse while increasing the number of pulses per second with minimal total power loss.

Abstract: A device for generating temporally distant light pulses is provided, the device including at least a first light source for generating a first sequence of light pulses at a first repetition rate, and a second light source for generating a second sequence of light pulses at a second repetition rate. In some embodiments the device includes at least one actuator element which influences the first and/or the second repetition rate, and a control element which charges the actuator element with a periodical modulation signal for periodical variation of the first and/or second repetition rate. A control circuit is also provided including at least a phase detector, a corrective element, a control element, and a superposition element that forms an actuator signal from a modulation signal and an output signal of the control element, and which charges the actuator element with the actuator signal.

Abstract: A light divider includes a light guide having a first surface and a second surface that reflect light incident on the light guide, the light guide causing the light to propagate through a portion between the first surface and the second surface, light dividing films that are provided in the light guide and so characterized that the light dividing films not only reflect but also transmit the light, and a plurality of light extracting portions that are provided on the first surface and allow light fluxes that the light dividing films have transmitted to exit through the first surface.

Abstract: A laser apparatus according to embodiment may include: a laser chamber filled with a laser gain medium; a pair of electrodes disposed in the laser chamber; a charger configured to apply a charge voltage for causing a discharge to occur between the pair of the electrodes; a pulse power module configured to covert the charge voltage applied by the charger into a short pulsed voltage, and apply the short pulsed voltage between the pair of the electrodes; and a controller configured to calculate input energies Ein applied to the pair of the electrodes based on the charge voltage, calculate an integration value Einsum of the input energies Ein by integrating the calculated input energies Ein, and determine whether the integration value Einsum exceeds an integration lifetime value Einsumlife of input energy or not.

Abstract: A method and apparatus for generating a pulsed jet of fluid, and transforming the jet into a plasma. The method includes using a high-pressure rapid solenoid valve, and a pipe mounted on an outlet opening of the solenoid valve to produce a pulsed fluid jet which is sub-millimetric in size, and the atomic density of which is more than 1020 cm?3.

Abstract: A method for polymerizing monomer units and/or oligomer units is disclosed. Said method is characterized in that the energy required for polymerization is introduced into the monomer units and/or oligomer units to be polymerized by means of infrared light pulses, wherein the infrared light pulses have a wavelength of 2500 to 20000 nm, an intensity of more than 1014 W/m2, a duration of more than 8 fs and less than 3 ps and a substantially linear polarization.

Abstract: The invention describes classes of robust fiber laser systems usable as pulse sources for Nd: or Yb: based regenerative amplifiers intended for industrial settings. The invention modifies adapts and incorporates several recent advances in FCPA systems to use as the input source for this new class of regenerative amplifier.

Abstract: A processing information acquisition system in a processing machine which feeds a processing point energy or material, the processing information acquisition system provided with a position information acquisition unit which acquires position information of a feed unit of energy or material, a feed rate control unit which receives a feed condition command of energy or material, converts the feed condition command to a control command which controls a feed of energy or material, and uses the converted control command to control a feed rate of energy or material from the feed unit, a feed rate estimation unit which acquires the control command from the feed rate control unit and calculates an estimated feed rate of energy or material which is fed to a processing point based on the control command, and an output unit which outputs the position information which the position information acquisition unit acquired and the estimated feed rate which the feed rate estimation unit calculated when the feed unit is locat

Abstract: Method for generating a series of laser pulses with a laser assembly, the laser assembly at least having two reflecting members, a laser medium and an electro-optical modulator are disclosed. The laser assembly operates in a light amplifying mode and runs a pulse extraction sequence. The pulse extraction sequence is run by applying a defined voltage change with reference to the amplification voltage, wherein changing of the voltage is adjusted such that at least one intermediate switching state is generated on side of the electro-optical modulator, the intermediate switching state providing a particular change of polarization of the amplified laser radiation by the electro-optical modulator, such that a final switching state is generated on side of the electro-optical modulator by applying a final extraction voltage at the end of the time period.

Abstract: A repetition rate (pulse) multiplier includes one or more beam splitters and prisms forming one or more ring cavities with different optical path lengths that delay parts of the energy of each pulse. A series of input laser pulses circulate in the ring cavities and part of the energy of each pulse leaves the system after traversing the shorter cavity path, while another part of the energy leaves the system after traversing the longer cavity path, and/or a combination of both cavity paths. By proper choice of the ring cavity optical path length, the repetition rate of an output series of laser pulses can be made to be a multiple of the input repetition rate. The relative energies of the output pulses can be controlled by choosing the transmission and reflection coefficients of the beam splitters. Some embodiments generate a time-averaged output beam profile that is substantially flat in one dimension.

Abstract: A pulsed UV laser assembly includes a partial reflector or beam splitter that divides each fundamental pulse into two sub-pulses and directs one sub-pulse to one end of a Bragg grating and the other pulse to the other end of the Bragg grating (or another Bragg grating) such that both sub-pulses are stretched and receive opposing (positive and negative) frequency chirps. The two stretched sub-pulses are combined to generate sum frequency light having a narrower bandwidth than could be obtained by second-harmonic generation directly from the fundamental. UV wavelengths may be generated directly from the sum frequency light or from a harmonic conversion scheme incorporating the sum frequency light. The UV laser may further incorporate other bandwidth reducing schemes. The pulsed UV laser may be used in an inspection or metrology system.

Abstract: A plasma processing apparatus includes a plasma generating device configured to generate a plasma within a processing vessel by using a high frequency wave generated by a microwave generator 41 including a magnetron 42 configured to generate the high frequency wave; detectors 54a and 54b configured to measure a power of a traveling wave that propagates to a load side and a power of a reflected wave reflected from the load side, respectively; and a voltage control circuit 53a configured to control a voltage supplied to the magnetron 42 by a power supply 43. Further, the voltage control circuit 53a includes a load control device configured to supply, to the magnetron 42, a voltage corresponding to a power calculated by adding a power calculated based on the power of the reflected wave measured by the detector 54b to the power of the traveling wave measured by the detector 54a.

Abstract: Systems and methods for non-invasive optical imaging are provided. One or more time-lenses can be utilized to perform an optical Fourier transform, and the time-to-wavelength conversion can generate a wavelength-encoded image of optical scattering, analogous to optical coherence tomography. This optical Fourier transform provides improved axial resolution and simplifies digital signal processing after data acquisition.

Abstract: The present invention relates to a method and a device for the simultaneous compression and characterization of ultrashort laser pulses. An embodiment of the method comprises applying predetermined spectral phases to the pulse to be characterized so as to perform a dispersion scan; applying a nonlinear process to the pulse to be characterized; measuring the resulting signal from the application of the predetermined spectral phases and nonlinear process; applying a numerical iterative algorithm to the measured signal to retrieve the spectral phase of the pulse to be characterized. A few cycle laser pulse may be negatively chirped with a pair of DCM, the controllable amount of positive dispersion may be provided by a pair of glass wedges, one of them being translated for dispersion or phase control, and the frequency spectrum may be measured as well as also frequency resolved the dispersion dependent second-harmonic of the signal being phase modulated.

Abstract: A fiber-based supercontinuum system including: a pump laser; a ZBLAN or other fluoride-based microstructured glass fiber; and control electronics; wherein the control electronics control the pump laser to generate laser pulses into the ZBLAN or other fluoride-based microstructured glass fiber. The fabrication of a ZBLAN photonic crystal fiber with sub-micron features and large air-filling fraction and the use of the fiber to generate a stable supercontinuum (200 to 2500 nm) from 140 fs, 1 nJ pulses at 1042 nm are disclosed.

Abstract: A laser source capable of emitting energy pulses greater than or equal to 100 TeraWatt, consisting of a laser chain that comprises in cascade: a solid-state laser oscillator; a first amplification stage with frequency chirping; and a last amplification stage with frequency chirping; a first filter with one or two non-linear crystals and third order non-linear optical susceptibility, capable of generating a cross-polarized wave, known as non-linear cross-polarization filter, inserted between these two amplification stages. The laser chain furthermore comprises: between the first and the last amplification stage, at least one other non-linear cross-polarization filter, i.e. N filters in the chain with N?2; and N?1 dispersion compensator(s), placed at the output of the first filter(s) (respectively).

Abstract: A frequency comb laser providing large comb spacing is disclosed. At least one embodiment includes a mode locked waveguide laser system. The mode locked waveguide laser includes a laser cavity having a waveguide, and a dispersion control unit (DCU) in the cavity. The DCU imparts an angular dispersion, group-velocity dispersion (GVD) and a spatial chirp to a beam propagating in the cavity. The DCU is capable of producing net GVD in a range from a positive value to a negative value. In some embodiments a tunable fiber frequency comb system configured as an optical frequency synthesizer is provided. In at least one embodiment a low phase noise micro-wave source may be implemented with a fiber comb laser having a comb spacing greater than about 1 GHz. The laser system is suitable for mass-producible fiber comb sources with large comb spacing and low noise. Applications include high-resolution spectroscopy.

Abstract: A system for distributing a reference oscillator signal includes a clock having a reference oscillator and a femtosecond laser stabilized by the reference oscillator. The system also includes at least one beamsplitter configured to split the femtosecond laser. The system further includes one or more remote nodes that are spaced from the clock. The remote nodes are configured to generate reference signals based on the split femtosecond laser.

Abstract: There is provided a pulse shaping device including a pulse generator configured to generate pulsed light by using a semiconductor laser for emitting light of a predetermined wavelength, and an optical member provided in a subsequent stage of the pulse generator and configured to compress a pulse time width of the pulsed light. The pulsed light has a first frequency dispersion state. The optical member imparts a second frequency dispersion state to the pulsed light, the second frequency dispersion state being a frequency dispersion state opposite to the first frequency dispersion state.

Abstract: A system and method generate laser pulses. Using the modulation signal from a pulse generation module, a seed laser diode generates seed light pulses in response to direct drive current modulation. The seed light pulses have a pulse duration longer than a target pulse duration and a spectral chirp. A compression module has dispersion characteristics over a broad spectral range. The pulse generation module is configured to adapt the modulation signal to tailor the spectral chirp of the seed light pulses in view of the dispersion characteristics of the compression module, such that propagation of the seed light pulses through the compression module compresses the seed pulses into output light pulses having the target pulse duration.

Abstract: The present invention provides a tunable optical frequency converter based on an amplitude modulator, which comprises a laser, a first optical isolator, a circulating frequency conversion module. Said circulating frequency conversion module is composed of an optical coupler, an amplitude modulator, an optical amplifier, a second optical isolator, a first optical circulator, an optical fiber Bragg grating, a second optical circulator, a tunable filter and a tunable attenuator. Light outputted by said laser is inputted to said circulating frequency conversion module to conduct frequency converting repeatedly after passing through the first optical isolator, and then separated by a tunable filter and a second optical circulator, then the frequency converted light is outputted from the port of the circulating frequency conversion module.

Abstract: 3D display device, 3D display system and method for displaying 3D images are disclosed in the present invention. The 3D display device comprises: a display screen; a backlight means including a pulse light source; and a drive means used to receive video signals which are based on a standard video transmission protocol, so as to control the display screen to display 3D images according to the video signals, and control the pulse light source to emit a backlight pulse in the form of pulse during a vertical blank of each frame period of the video signals, wherein the duration of the backlight pulse is shorter than that of the vertical blank. The degrading of light is avoided in the 3D display device and the efficiency of the backlight can achieve almost 100%.

Abstract: A laser system for semiconductor inspection includes a fiber-based fundamental light source for generating fundamental light that is then converted/mixed by a frequency conversion module to generate UV-DUV laser light. The fundamental light source includes a nonlinear chirp element (e.g., a Bragg grating or an electro-optic modulator) that adds a nonlinear chirp to the seed light laser system prior to amplification by the fiber amplifier(s) (e.g., doped fiber or Raman amplifiers). The nonlinear chirp includes an x2 or higher nonlinearity and is configured to compensates for the Self Phase Modulation (SPM) characteristics of the fiber-based amplifiers such that fundamental light is generated that has a spectral E95 bandwidth within five times that of the seed light. When multiple series-connected amplifiers are used, either a single nonlinear chirp element is provided before the amplifier string, or a chirp elements are included before each amplifier.

Abstract: A laser system may include: a master oscillator configured to output pulsed laser light; an amplification device for amplifying the pulsed laser light from the master oscillator; a first timing detector configured to detect a first timing at which the master oscillator outputs the pulsed laser light; a second timing detector configured to detect a second timing at which the amplification device discharges; and a controller configured to, based on results of detection by the first timing detector and the second timing detector, control at least one of the first timing and the second timing so that the amplification device discharges when the pulsed laser light passes through a discharge space of the amplification device.

Abstract: A semiconductor-laser-device assembly includes a mode-locked semiconductor-laser-element assembly including a mode-locked semiconductor laser element, and a dispersion compensation optical system, on which laser light emitted from the mode-locked semiconductor laser element is incident and from which the laser light is emitted; and a semiconductor optical amplifier having a layered structure body including a group III-V nitride-based semiconductor layer, the semiconductor optical amplifier configured to amplify the laser light emitted from the mode-locked semiconductor-laser-element assembly.

Abstract: A robust, compact optical pulse train source is described, with the capability of generating sub-picosecond micro-pulse sequences, which can be periodic as well as non-periodic, and at repetition rates tunable over decades of baseline frequencies, from MHz to multi-GHz regimes. The micro-pulses can be precisely controlled and formatted to be in the range of many ps in duration to as short as several fs in duration. The system output can be comprised of a continuous wave train of optical micro-pulses or can be programmed to provide gated bursts of macro-pulses, with each macro-pulse consisting of a specific number of micro-pulses or a single pulse picked from the higher frequency train at a repetition rate lower than the baseline frequency. These pulses could then be amplified in energy anywhere from the nJ to MJ range.

Abstract: An apparatus and method for two-dimensional wavelength beam combining of a plurality of laser sources. In one embodiment, an external cavity multi-wavelength laser comprises an array of laser gain elements, two optical transform lenses, two dispersive elements, an imaging system, a deflective array, and an output coupler. First and second optical transform lenses spatially overlap optical beams in first and second dimensions forming regions of overlap at the first and second dispersive elements. The deflective array comprises a plurality of mirrors wherein each mirror deflects and rearranges the optical beams from a common row. The dispersive elements introduce wavelength discrimination that when combined with the output coupler, provide the required feedback gain. The output coupler creates a single output port for the plurality of external optical cavities established in unison with the plurality of laser emitters.

Abstract: The present invention pertains to a device and a method for measuring a via hole of a silicon wafer, wherein it is possible to precisely measure the depth of the via hole without damaging the wafer. Broadband infrared light is radiated to a silicon wafer which has a superior light transmission property, so that the depth of the via hole may be measured from the light which is reflected from each boundary surface of the wafer and the interference signal of reference light. The via hole measuring device according to the present invention includes: a light source unit for generating broadband infrared light; and an interferometer for radiating the light generated from the light source unit to a silicon wafer, so as to measure the depth of a via hole formed on the wafer according to the spectrum period of the interference signal of the light, which is reflected from the silicon wafer.

Abstract: In order to further develop a circuit arrangement or circuit, in particular driver circuit, and a method for controlling at least one light-emitting component, in particular at least one electro-optical transducer, for example at least one light-emitting diode (LED) or electroluminescent diode or at least one laser, such as at least one semiconductor laser, by switching at least one switching element at least between a first switching position and a second switching position, at least one further circuit component is switched to active or switched on in the second switching position, so that current drain and output resistance are as low as possible, so that the highest possible frequency or switching speed as well as the highest possible output voltage for the light-emitting component can be achieved, it is proposed that the light-emitting component is controlled by varying its operating voltage.

Abstract: The present invention details fabrication guidelines of integrated optoelectronic oscillators with frequency and phase stability, having higher frequency selectivity in a relatively small size (compared to the larger size of a higher order electrically realized RF filter), reduced temperature sensitivity, and minimized frequency drift. The integrated photonic components and RF oscillator may use Silicon photonics and microelectronic integration using CMOS and BiCMOS technology, eliminating the need for bulky and/or discrete optical and microwave components.

Abstract: A mode locked fiber laser system is arranged to have a lasing bandwidth and having a linear cavity, the cavity including a gain medium, a saturable absorber having a saturation power, and a filter having a spectral response, wherein the mode locked fiber laser system is arranged so that substantial CW mode locked operation is obtainable with less than 3 times the saturation fluence impinging on the saturable absorber.

Abstract: There is provided a method of making an optical polymer waveguide having an arbitrary refractive index profile, the method including: a) providing a first input optical beam having a first beam intensity profile and a second input optical beam having a second beam intensity profile; b) combining the first and second input optical beams to form an output optical beam having an output beam intensity profile; and c) forming the optical waveguide on a substrate by: exposing the optical materials of the waveguide to the output optical beam; and curing the optical materials using said output optical beam.

Abstract: A high power ultrashort chirped pulse amplifier laser system, with a chirped pulse amplifier laser module including an optical pulse stretcher, at least one optical power amplifier, and an optical pulse compressor, and a beam interferometer module in the optical path. The beam interferometer receives splits the pulse into at least two pulses, adds a time delay to at least one of the pulses and recombines the pulses to produce a temporally modulated pulse. The resulting modulated output pulse from the CPA laser module can have enhanced laser contrast due to greatly reduced subpicosecond pedestal in the immediate region of the peak pulse, or can have other desirable characteristics.

Abstract: A laser apparatus according to embodiment may include: a laser chamber filled with a laser gain medium; a pair of electrodes disposed in the laser chamber; a charger configured to apply a charge voltage for causing a discharge to occur between the pair of the electrodes; a pulse power module configured to covert the charge voltage applied by the charger into a short pulsed voltage, and apply the short pulsed voltage between the pair of the electrodes; and a controller configured to calculate input energies Ein applied to the pair of the electrodes based on the charge voltage, calculate an integration value Einsum of the input energies Ein by integrating the calculated input energies Ein, and determine whether the integration value Einsum exceeds an integration lifetime value Einsumlife of input energy or not.

Abstract: A method for generation of electromagnetic radiation has the following method steps: generation of electromagnetic radiation at a useful frequency, division of the electromagnetic radiation into a useful beam and a secondary beam, frequency shift of the electromagnetic radiation of the secondary beam, control of the useful frequency as determined by a manipulated variable, wherein the manipulated variable is derived from the frequency-shifted radiation of the secondary beam.

Abstract: A multi-color harmonic synthesized laser system for laser processing and a laser processing method using multi-color harmonic synthesized laser are disclosed. The multi-color harmonic synthesized laser system includes a laser source for providing a single laser wave, a converter for converting the single laser wave into a plurality of harmonic waves with different frequencies, and a modulating unit for modulating amplitudes and relative phases of the harmonic waves to form a plurality of modulated harmonic waves, so as to synthesize the modulated harmonic waves as a single synthesized laser wave, wherein the single synthesized laser wave is focused on an object to perform a laser processing. The converter includes a plurality of non-linear crystals for converting the single laser wave into a fundamental harmonic wave and a plurality of multi-frequency harmonic waves. The harmonic waves are coherent and collinear, and the phases of the harmonic waves are related to one another.