Abstract: A method, apparatus, and system for an external cavity laser with a Michelson Interferometer.

Abstract: An optical component, in particular a passive component, for optical waveguiding, includes: optical waveguides formed in a carrier substrate as a waveguide pattern. The optical waveguides are formed in the carrier substrate by recesses by cutting out the optical waveguide. In an embodiment, the optical waveguide is connected to the carrier substrate by web-shaped supporting structures.

Abstract: An apparatus includes a laser, an optical power combiner, and an electronic controller. The laser has a plurality of modulatable optical reflectors and is operable to emit mutually coherent optical beams from the modulatable optical reflectors. The optical power combiner has a first optical inputs connected to receive light of one of the optical beams emitted from a first of the modulatable optical reflectors and has a second optical input connected to receive light of one of the optical beams emitted from a second of the modulatable optical reflectors. The electronic controller is connected to operate the first and second of the modulatable optical reflectors to modulate the optical beams emitted therefrom to carry respective first and second data streams. The optical power combiner is connected to interfere the light received from the first and second of the modulatable optical reflectors with a relative phase difference.

Abstract: An accelerometer includes a vacuum chamber to receive a laser beam and a nanoparticle. The nanoparticle is trapped in an oscillating state in a focus of the laser beam. A processor calculates an acceleration of the nanoparticle based on changes in position of an oscillating nanoparticle. A plurality of photodetectors are spaced apart to identify spatial coordinates of the oscillating nanoparticle. The processor may calculate the acceleration of the nanoparticle based on changes in the spatial coordinates of the oscillating nanoparticle and a frequency of oscillation of the nanoparticle within the vacuum chamber. The nanoparticle may have a diameter of a predetermined size and is trapped in the focus of the laser beam based on a polarizability of the nanoparticle. The diameter of the predetermined size of the nanoparticle may be smaller than a wavelength of the laser beam.

Abstract: In a light deflection device, the radiation efficiency of radiated light beams is to be improved. The light deflection device is configured by a photonic crystal waveguide having a lattice array with low refractive index parts periodically arrayed in a surface of a high refractive-index member. The lattice array has a dual-periodic structure consisting of a first periodic array and a second periodic array which differ from each other in periodic arrangement of the low refractive index parts. A line defect where no low refractive index parts are arrayed constitutes a waveguide core for propagating incident light. The cross section of at least either the first periodic array or the second periodic array constituting the periodic arrays of the dual-periodic structure is asymmetrical in the thickness direction of the low refractive index parts.

Abstract: An illumination system includes at least one excitation light source, a holographic optical element and a phosphor wheel. The excitation light source provides a first color beam. The holographic optical element is located on a path of the first color beam and transmits the first color beam to the phosphor wheel along a first path. The phosphor wheel has a light wavelength conversion portion and a reflective portion. The light wavelength conversion portion converts the first color beam into a second color beam and reflects the second color beam back to the holographic optical element. The reflective portion reflects the first color beam back to the holographic optical element. The holographic optical element transmits the second color beam and the first color beam reflected from the phosphor wheel along a second path, and the first path is different from the second path. A projection apparatus is also provided.

Abstract: A housing provided to a light source device has a sliding surface to which a first lens portion is fixed and an inclined support surface to which a second lens portion is fixed. The sliding surface is vertical to a direction of an optical axis of a semiconductor laser and wider than a first fixing surface of the first lens portion that is fixed to the sliding surface. The inclined support surface is parallel to the direction of the optical axis and wider than a second fixing surface of the second lens portion that is fixed to the inclined support surface.

Abstract: A system includes a build-up cavity to locally increase the power of light beams within the build-up cavity, where the light beams interact with samples to sense a substance of interest. The build-up cavity is disposed within a main cavity that includes a gain material to amplify the light beams. A portion of the light beams oscillating in the build-up cavity propagators through the build-up cavity and functions as a feedback to control the linewidth of the light beams. The two cavities can function as two separate “filters” and light beams at wavelengths that propagate through both of these “filters” can be preferentially amplified. The combination of the build-up cavity and the main cavity can achieve high power and narrow linewidth for the light beams without complex electronics, thereby decreasing the size, weight, and power (SWaP) of the system.

Abstract: Embodiments of the present invention provide an optical signal modulation apparatus and system. The optical signal modulation apparatus includes: a laser, where each of at least one first output end and at least one second output end of the laser is connected to an electro-absorption modulator (EAM), the laser is configured to generate at least two optical signals, where at least one of the optical signals is sent to at least one EAM by using the at least one first output end, and at least one of the optical signals is sent to at least one EAM by using the at least one second output end, and each EAM is configured to modulate a received electrical signal onto the received optical signal for outputting. The apparatus has a simple structure and less complex production.

Abstract: An external resonator type laser device has an optical element that forms an external resonator with a semiconductor device by selecting and reflecting light of a specific wavelength range from light outputted from the semiconductor device; a supporting member formed of a material having a larger coefficient of linear expansion than the optical element; and a first mount interposed between the optical element and the supporting member, formed of a material having a coefficient of linear expansion closer to that of the optical element compared with that of the supporting member. The optical element is adhered to the first mount. The first mount is adhered to the supporting member by an adhesive having a Shore hardness of less than or equal to 65.

Abstract: Apparatuses that include an input and output waveguide; and a nested resonator including at least an external loop and a nested loop positioned entirely inside the external loop, each loop independently having a length that supports a single resonant wavelength, the external loop further including: an input interface configured to couple energy between the input waveguide and the nested resonator, an output interface configured to couple energy between the nested resonator structure and the output waveguide, and an internal interface, the external loop and the nested loop configured to couple energy there between via the internal interface.

Abstract: A wavelength convertor includes a beam splitter which splits a pulsed laser beam at wavelength ?p into a first higher power pulse portion and a second low power pulse portion. A fiber super continuum (SC) generator is coupled to receive the second pulse portion which converts the second pulse portion into a SC pulse having a bandwidth of >100 nm including a narrow spectral portion at wavelength ?s. An optical parametric amplifier (OPA) having a periodically poled material is included with domains arranged to provided quasi-phase matching for amplification at ?s and pumping at ?p. The arrival of the SC pulse portion at ?s and the first pulse portion at the OPA is synchronized to overlap in time. The OPA is seeded by the SC pulse portion at ?s and pumped by the first pulse portion to provide an amplified OPA seed at ?s.

Abstract: An apparatus comprises an optical port; a first optical transmitter; a second optical transmitter; a partially reflective mirror positioned between the first optical transmitter, the second optical transmitter, and the optical port; and an optical rotator positioned between the partially reflective mirror and the first optical transmitter.

Abstract: The resonator includes a lasing medium having a thickness, a first mirror disposed at a first end of the lasing medium and a second mirror disposed at a second end of the lasing medium. The first and second mirror cooperate to fold an intra-cavity laser beam along a plurality of paths through the lasing medium, thereby defining a boundary of a superfluous region within the resonator, wherein the intra-cavity laser beam does not pass through the superfluous region. The first mirror and the second mirror form a laser resonator for a parasitic laser mode, a portion of which is located within the superfluous region. A parasitic mode suppressor is located within the superfluous region of the resonator.

Abstract: A method for manipulating one or more particles comprising exposing the particle(s) to a beam of radiation that is able to lift and or impart an acceleration to the particle(s) to cause it to move in a curved trajectory.

Abstract: A fiber optic parametric amplifier that includes a resonating cavity. The resonating cavity includes linear fiber optic gain medium, with negative chromatic dispersion; and a nonlinear fiber optic gain medium with positive chromatic dispersion.

Abstract: A laser apparatus that allows selection of a wavelength of output light from a plurality of options. The laser apparatus includes: a resonator made up from an output mirror and reflection means having a plurality of reflective surfaces fixed in position; a laser medium disposed on an optical axis inside the resonator; branch means branching an optical path of a light beam formed on the optical axis when light oscillates in the laser medium into a plurality of optical paths having an end at one reflective surface of the reflection means, the branch means forming a first optical path coinciding with the optical axis when located out of the optical axis, and forming a branch path by moving the light of the optical axis parallel when located on the optical axis.

Abstract: A device includes a first resonating cavity and a second resonating cavity. The first resonating cavity includes a first end surface and a second end surface. The first resonating cavity has a first free spectral range. The first free spectral range is a first frequency of a wavelength dependent ripple in a gain of the device that is a function of a first distance between the first end surface and the second end surface. The second resonating cavity includes a third end surface and a fourth end surface. A second distance between the third end surface and the fourth end surface is set such that an amplitude of the wavelength dependent ripple is reduced.

Abstract: A laser beam combining and power scaling device and method. A first highly reflective mirror residing perpendicular to the first optical axis reflecting radiation emitted from the first laser head. A first Q-switch in alignment with the first optical axis interposed between the first highly reflective mirror and the first laser head. A second highly reflective mirror residing perpendicular to the second optical axis reflecting radiation emitted from the second laser head. The second Q-switch in alignment with the second optical axis is interposed between the second highly reflective mirror and the first laser head. A third optical axis is coincident with the first optical axis. A third highly reflective mirror residing perpendicular to the third optical axis in alignment therewith. The third optical axis may include a third diode pumped laser head and Q-switch. A beam splitter resides at the intersection of the axes.

Abstract: A method includes providing a capability to control divergence of a coherent light beam having an axially symmetrical distribution of intensity thereof through an optical divergence controller, and directing an output of the optical divergence controller related to the controlled divergence of the coherent light beam onto a glass prism. The glass prism includes a planar shape onto which a pyramidal structure is formed. The method also includes controlling a distance between maxima of an output light field of the glass prism and intensity thereof through controlling the divergence of the coherent light beam through the optical divergence controller and/or varying a distance between the optical divergence controller and the glass prism, and utilizing the output light field of the glass prism in controlling microparticles in a microtechnology or a nanotechnology application.

Abstract: Nondegenerate mirrorless four-wave mixing oscillation with frequency tunability is proposed in nonlinear waveguide of the third-order nonlinearity such as silicon waveguide) by using two different spatial modes. As low as ˜2 W threshold power is obtained in several centimeters long waveguide. In one aspect, a method includes propagating a first wave along an axis of a multimode waveguide in a forward direction, the first optical wave having a first frequency; propagating a second wave along the axis of the multimode waveguide in a backward direction, the second wave having a second frequency; the waveguide configured to support multiple modes, including at least a fundamental mode and a second mode; and the propagating the first wave occurs at a same time as the propagating the second wave to generate a third wave in the forward direction having a third frequency and fourth wave in the backward direction having a fourth frequency.

Abstract: A light source apparatus includes a laser oscillator equipped with a first optical resonator, a plurality of second optical resonators including input portions respectively connected in parallel to the first optical resonator, a plurality of light extraction units configured to extract a light beam from an output portion of each second optical resonator, and a light multiplexing unit configured to multiplex the light beam extracted from each light extraction unit, wherein the light source apparatus causes the light multiplexing unit to output a multiplexed light beam passed through the plurality of second optical resonators, an optical member having refractive index dispersion and an optical amplification medium are disposed in each of the plurality of second optical resonators, and the optical amplification media of the plurality of second optical resonators are different from each other in maximum gain wavelength.

Abstract: The present invention relates to a Q-switching-induced gain-switched erbium pulse laser system, capable of generating erbium laser pulses within the 2.5 ?m to 3.0 ?m wavelength region, by means of Q-switching operation at 1.6 ?m. At first, an Er3+-doped gain medium is pumped and Q-switched at the wavelength region from 1.58 ?m to 1.62 ?m, so that a Q-switched pulse is formed from the Er3+-doped gain medium. The Q-switched pulse results in an instant positive population inversion between the levels 4I11/2 and 4I13/2 of the Er3+-doped gain medium, followed by a gain-switched laser pulse at the wavelength region from 2.5 ?m to 3.0 ?m.

Abstract: Apparatus, systems, and methods of generating multi combs can be used in a variety of applications. In various embodiments, an etalon can be disposed in the laser cavity of a mode-locked laser to adjust frequency combs. Additional apparatus, systems, and methods are disclosed.

Abstract: Unidirectionality of lasers is enhanced by forming one or more etched gaps (78, 80) in the laser cavity. The gaps may be provided in any segment of a laser, such as any leg of a ring laser, or in one leg (62) of a V-shaped laser (60). A Brewster angle facet at the distal end of a photonic device coupled to the laser reduces back-reflection into the laser cavity. A distributed Bragg reflector is used at the output of a laser to enhance the side-mode suppression ratio of the laser.

Abstract: A laser system having a cavity formed by at least two sub-cavities and a mechanism for optically pumping a first of the at least two sub-cavities. In the system, the optical pumping mechanism is arranged in such away to not reach a laser emission threshold of the first sub-cavity, the first sub-cavity (2) comprising a device for generating a short pulse, a second sub-cavity (3) comprising an external triggering device. The first and second sub-cavities are coupled such that the triggering of the second sub-cavity has at least two such laser systems, to a light emission system with a wide spectral band, comprising such a laser system and a mechanism for generating non-linear optical effects inserted into the second sub-cavity, and to a light generator with a wide spectral band, comprising such a laser generator having at least one laser system provided with a mechanism for generating non-linear optical effects inserted into the second sub-cavity.

Abstract: The multi-wavelength laser is a ring laser source working at room temperature. The laser has an inner cavity disposed in an outer cavity. A pair of circulators disposed in the inner cavity is configured to assure counter-propagation of light between the inner cavity and the outer cavity. A gain-clamped semiconductor optical amplifier (GC-SOA) is formed by combining a SOA and a Fiber Fabry-Perot Tunable Filter (FFP-TF) with the circulator pair. This configuration in the laser cavity results in an improvement in terms of transient gain excursions by applying an optical feedback. This attribute of the GC-SOA enables realizing a stable multi-wavelength laser source.

Abstract: A the vertical-cavity surface-emitting laser includes a stripe-shaped active medium (10) having an emission maximum at a first wavelength (?1), wherein a first reflector (18) is arranged below the stripe-shaped active medium (10) and a second reflector (20) is arranged above the stripe-shaped active medium (10), with the first reflector (18) facing the second reflector (20), wherein the first reflector (18) and a second reflector (20) have a reflectivity maximum in the region of the first wavelength (?1), wherein a third reflector (12) and a fourth reflector (13) are each arranged on a side above or next to the stripe-shaped active medium (10), wherein the third reflector (12) faces the fourth reflector (13), and wherein the third reflector (12) and the fourth reflector (13) have a reflectivity maximum in the region of a second wavelength (?2), wherein the first wavelength (?1) is greater than the second wavelength (?2).

Abstract: A laser mux assembly generally includes a back reflector selectively coupled to one of the input ports of an optical multiplexer, such as an arrayed waveguide grating (AWG), and at least one laser emitter coupled to an output port. The laser emitter may include a gain region that emits light across a plurality of wavelengths including, for example, channel wavelengths in an optical communication system. The emitted light is coupled into the output port and the AWG or optical multiplexer filters the emitted light from the laser emitter at different channel wavelengths. The back reflector reflects the filtered light at the respective channel wavelength such that lasing occurs at the channel wavelength(s) of the reflected, filtered light. The laser mux assembly may be used, for example, in a tunable transmitter, to generate an optical signal at a selected channel wavelength.

Abstract: A method and apparatus for spatially separating beams with different wavelengths is presented. The system includes: a light source (i.e. a laser with multiple harmonic output beams) with multiple wavelengths emitted along a single beam path or very nearly collinear beam paths, a path which connects the light source to a wavelength dependent beam separator, and a second path for blocking unwanted output wavelengths which connects the beam separation region to the laser output.

Abstract: A thin beam laser crystallization apparatus for selectively melting a film deposited on a substrate is disclosed having a laser source producing a pulsed laser output beam, the source having an oscillator comprising a convex reflector and a piano output coupler; and an optical arrangement focusing the beam in a first axis and spatially expanding the beam in a second axis to produce a line beam for interaction with the film.

Abstract: A compact, lightweight, laser target designator uses a TIR bounce geometry to place an end-pumped gain element functionally in the center of the resonator path, thereby allowing the resonator path to be terminated by a pair of crossed Porro prisms, so that the designator produces a high quality beam that is insensitive to alignment and temperature, and is low in manufacturing cost. Some embodiments fold the Porro legs of the resonator path back toward the gain element for compactness. Embodiments use a single gain element as both an oscillator gain element with TIR and as an output amplifier gain element without TIR. Various embodiments use block optical elements in a planar layout on a standard support medium such as aluminum to facilitate automated manufacturing.

Abstract: A single mode semiconductor laser includes a first optical resonator, which is formed by a total reflection surface and a partial reflection surface. Light emitted from the partial reflection surface of the single mode semiconductor laser enters a fiber Bragg grating, which includes a diffraction grating formed therein. The diffraction grating forms a second optical resonator in combination with the total reflection surface of the single mode semiconductor laser. A fiber amplifier amplifies a laser beam emitted from the fiber Bragg grating.

Abstract: An apparatus for producing coherent, pulsed ultraviolet light with pulse durations that range between 1 ps and 1 ?s includes one or more source lasers in the visible or near-infrared frequency range. The apparatus also includes one or more FC stages, at least one of the one or more FC stages including a nonlinear FC device and one or more optical elements. The optical elements include a reflector, a focusing element, a polarization-controlling optic, a wavelength separator, or a fiber optic component. The FC device includes a huntite-type aluminum double borate nonlinear optical material configured to produce FC light having a wavelength between 190 and 350 nm and a composition given by RAl3B4O12, where R comprises one or a plurality of elements {Sc, La, Y, Lu}. The nonlinear optical material is characterized by an optical transmission greater than 70% over the wavelength range of 190 to 350 nm.

Abstract: A system for generating multiple simultaneous laser wavelengths, said system comprising: a pulsed slave laser comprising a non-linear electro-optic crystal optically coupled to a lasing crystal in a ring cavity configuration, said non-linear electro-optic crystal configured to adjust an optical path length of said ring cavity in response to an applied voltage potential; an energy pump configured to initiate a pulse cycle in said pulsed slave laser in response to a trigger; a cavity control circuit configured to apply said voltage potential to said non-linear electro-optic crystal to generate a cavity resonance condition associated with said adjusted optical path length, said cavity control circuit further configured to provide said trigger to said energy pump in response to a detection of said cavity resonance condition; and one or more seed lasers configured to inject a single frequency laser beam into said pulsed slave laser.

Abstract: A position-measuring device, for ascertaining the position of two objects which are disposed in a manner allowing movement relative to each other in at least one measuring direction, includes a light source, as well as a splitting device by which a light beam, provided by the light source, is split into two or more partial beams of rays. The partial beams of rays traverse at least two partial-beam paths. Interfering partial beams of rays from the partial-beam paths strike a plurality of opto-electronic detector elements, so that displacement-dependent position signals are ascertainable via the detector elements. The light source takes the form of a semiconductor laser having a fiber-grating feedback device.

Abstract: A semiconductor laser using an external resonator. A laser diode chip emits a laser beam in a horizontal direction parallel to the bottom plane of a package, and the travel path of the laser beam is changed into a vertical direction by a reflective mirror next to a laser beam-emitting surface of the laser diode chip. As a result, the beam arrangement of the external cavity is available on a plane parallel to the bottom plane of the package through a lens installed on the vertical travel path of the laser beam. Consequently, the beam is easily arranged. Furthermore, an additional reflective mirror is installed above the lens which changes the vertical travel path into a horizontal travel path, which allows the beam traveling parallel to the bottom plane to be easily arranged through the lens. The production of the package can also be enabled in the configuration where various optical tools are arranged on the bottom of the package.

Abstract: A laser beam combining and power scaling device and method. A first highly reflective mirror residing perpendicular to the first optical axis reflecting radiation emitted from the first laser head. A first Q-switch in alignment with the first optical axis interposed between the first highly reflective mirror and the first laser head. A second highly reflective mirror residing perpendicular to the second optical axis reflecting radiation emitted from the second laser head. The second Q-switch in alignment with the second optical axis is interposed between the second highly reflective mirror and the first laser head. A third optical axis is coincident with the first optical axis. A third highly reflective mirror residing perpendicular to the third optical axis in alignment therewith. The third optical axis may include a third diode pumped laser head and Q-switch. A beam splitter resides at the intersection of the axes.

Abstract: Semiconductor light-emitting devices; methods of forming semi-conductor light emitting devices, and methods of operating semi-conductor light emitting devices are provided. A semiconductor light-emitting device includes a first laser section monolithically integrated with a second laser section on a common substrate. Each laser section has a phase section, a gain section and at least one distributed Bragg reflector (DBR) structure. The first laser section and the second laser section are optically coupled to permit optical feedback therebetween. Each phase section is configured to independently tune a respective one of the first laser section and second laser section relative to each other.

Abstract: A hybrid CW MOPA includes an OPS-laser resonator delivering radiation in a plurality of longitudinal lasing-modes or wavelengths. The multiple longitudinal mode output is amplified in a fiber-amplifier. Amplified lasing-modes from the fiber-amplifier are frequency-converted by an optically nonlinear crystal in a ring-resonator having the same length as the laser resonator, such that the ring-resonator is resonant for all of the amplified lasing-modes.

Abstract: Systems and methods are disclosed that provide a direct indication of the presence and concentration of an analyte within the external cavity of a laser device that employ the compliance voltage across the laser device. The systems can provide stabilization of the laser wavelength. The systems and methods can obviate the need for an external optical detector, an external gas cell, or other sensing region and reduce the complexity and size of the sensing configuration.

Abstract: A system comprising a multiplicity of quantum dot lasers disposed on a back surface of a control circuit, wherein each of the quantum dot lasers produces coherent light; a multiplicity of micro-lens collimators, each micro-lens collimator secured to a corresponding quantum dot laser, where light generated by the quantum dot laser passes through the fiber and exits at the tip; a diffraction grating, wherein the light from each of the micro-lens collimators is directed to the diffraction grating; and wherein the coherent light leaving the diffraction grating is a high powered optical light.

Abstract: A system for emitting a polychromatic light, has a laser cavity device used to optically pump the laser cavity emit radiation according to at least one excitation wavelength and light guiding mechanism arranged in such a way as to supply a polychromatic light to an outlet in the event of excitation by the radiation in a non-linear interaction regime. In the system, the guiding mechanism is arranged inside a cavity formed by at least two sub-cavities, a first sub-cavity forming the laser cavity and a second sub-cavity comprising the guiding mechanism, the first and second sub-cavities being coupled.

Abstract: A radiation-emitting thin film semiconductor chip is herein described which comprises a first region with a first active zone, a second region, separated laterally from the first region by a space, with a second active zone which extends parallel to the first active zone in a different plane, and a compensating layer, which is located in the second region at the level of the first active zone, the compensating layer not containing any semiconductor material.

Abstract: A laser diode is configured with a substrate delimited by opposite AR and HR reflectors and a gain region. The gain region bridges the portions of the respective AR and HR reflectors and is configured with a main resonant cavity and at least one side resonant cavity. The main resonant cavity spans between the portions of the respective reflectors, and at least one additional resonant cavity extends adjacent to the main resonator cavity. The gain region is configured so that stimulated emission is generated only in the main resonant cavity. Accordingly, the laser diode is operative to radiate a high-power output beam emitted through the portion of the AR reflector which is dimensioned to shape the output beam with the desired near-field.

Abstract: Presented herein is a multipass optical amplifier including a thin-disk gain medium, a first reflective element optically coupled to the gain medium, a first parabolic reflector in optical communication with the gain medium and the first reflective element, a second parabolic reflector in optical communication with the first parabolic reflector, and a second reflective element in optical communication with the second parabolic reflector. The amplifier also includes a pump source, a signal beam source, and a chamber having first and second regions configured about the multipass optical amplifier with a port that extracts gas from the chamber. The first region includes the first parabolic reflector, the gain medium, and the first reflective element. The second region of the chamber includes the second reflective element and the second parabolic reflector. An input optic propagates the signal beam through the amplifier to impinge the gain medium multiple times for gain.

Abstract: A laser amplifier system is provided which comprises a resonator with optical resonator elements which determine a course of a resonator radiation field which propagates along an optical axis and at least one laser-active medium (LM). The resonator is designed as a split resonator and has a first resonator section which extends from a first virtual plane of separation and a second resonator section which extends from a second virtual plane of separation. The resonator sections are dimensioned optically such that the resonator radiation field has radiation field states corresponding to the same resonator modes in each of the virtual planes of separation. An amplifying unit optically independent of the resonator is arranged between the first and the second virtual planes of separation. The amplifying unit comprises the at least one laser-active medium and couples the radiation field states in a neutral manner with respect to the resonator modes.

Abstract: The present invention is directed to a semiconductor laser device comprising a first resonator section for resonating an optical resonator signal for providing an optical output signal at an output of said laser device, wherein said first resonator section is arranged for selectively resonating at a plurality of discrete output wavelengths, and wherein said laser device further comprises a second resonator section operatively connected to said first resonator section, said second resonator section being arranged for providing an optical feedback signal at a feedback wavelength to said first resonator section for locking said first resonator section into resonating at a selected output wavelength of said discrete output wavelengths, which selected output wavelength corresponds to said feedback wavelength for providing said optical output signal.

Abstract: A light emitting device includes first and second cladding layers and an active layer therebetween including first and second side surfaces and first and second gain regions, a second side reflectance is higher than a first side reflectance, a first end surface part of the first gain region overlaps a second end surface part of the second gain region in an overlapping plane, the first gain region obliquely extends from the first end surface to a third end surface, the second gain region obliquely extends from the second end surface to a fourth end surface, a first center line connecting the centers of the first and third end surfaces and a second center line connecting the centers of the second and fourth end surfaces intersect, and the overlapping plane is shifted from the intersection point toward the first side surface.

Abstract: A laser beam combining and power scaling device and method. A first highly reflective mirror residing perpendicular to the first optical axis reflecting radiation emitted from the first laser head. A first Q-switch in alignment with the first optical axis interposed between the first highly reflective mirror and the first laser head. A second highly reflective mirror residing perpendicular to the second optical axis reflecting radiation emitted from the second laser head. The second Q-switch in alignment with the second optical axis is interposed between the second highly reflective mirror and the first laser head. A third optical axis is coincident with the first optical axis. A third highly reflective mirror residing perpendicular to the third optical axis in alignment therewith. The third optical axis may include a third diode pumped laser head and Q-switch. A beam splitter resides at the intersection of the axes.