Abstract: In various embodiments, the concentration and deposition of siloxane materials within components of laser systems, such as laser resonators, is reduced or minimized utilizing mitigation systems that may also supply gas having low siloxane levels into multiple different components in series or in parallel.

Abstract: An optical device may include an array of vertical-cavity surface-emitting lasers (VCSELs) having a design wavelength, each VCSEL having an emission area. The optical device may include a first metal layer, substantially covering the array, a second metal layer substantially covering the first metal layer, and an electrical isolation layer, between the first metal layer and the second metal layer, that includes vias for electrically connecting portions of the first metal layer and portions of the second metal layer. The optical device may include a dielectric disposed over the emission area of each VCSEL. A variation in a thickness of the dielectric across at least approximately 90% of an area of the dielectric may be less than approximately 2% of the design wavelength. A depth of a well around the emission area may be equal to at least approximately 10% of a width of the emission area.

Abstract: A light emitting device includes: a solid-state light emitting element that radiates blue-series laser light; and a wavelength converter 100 that absorbs the laser light and performs wavelength conversion of the absorbed laser light into light with a longer wavelength than a wavelength of the laser light. The wavelength converter includes: a silicate phosphor 1 containing Lu2CaMg2(SiO4)3:Ce3+ as a main component; and an aluminate phosphor 2 containing Lu3(Al1-xGax)2(AlO4)3:Ce3+ (where x is a numeric value that satisfies 0<x?1) as a main component.

Abstract: A wavelength selection method for a tunable laser includes: obtaining a target wavelength; and calculating target resistance values of two thermistors, respectively, corresponding to the target wavelength. Each of the two thermistors is used to monitor the temperature of a corresponding one of two wavelength selection components. Each of the target resistance values is calculated according to a relationship between a wavelength drift and a resistance change of the corresponding thermistor and according to an initial wavelength and an initial resistance value of the corresponding thermistor corresponding to the initial wavelength. The method further includes: heating the two wavelength selection components to control their temperatures until real-time resistance values of the two thermistors reach the target resistance values, respectively; and stabilizing the real-time resistance values at the target resistance values and outputting a laser beam having the target wavelength.

Abstract: An apparatus includes at least one Raman medium configured to receive a pump beam and shift at least a portion of the pump beam into a Stokes-shifted output beam. The apparatus also includes a first lens configured to receive and focus the pump beam into the at least one Raman medium. The apparatus further includes first and second retro-lens assemblies, each including at least one prism configured to reflect beams from the at least one Raman medium back into the at least one Raman medium and multiple second lenses configured to control optical propagation of the beams entering and exiting the at least one Raman medium. Multiple pairs of lenses form multiple confocal arrangements of lenses. The pairs of lenses include the first lens and the second lenses of the retro-lens assemblies. The at least one Raman medium is optically positioned between the lenses in the confocal arrangements of lenses.

Abstract: A process for creating a stabilized diode laser device is disclosed, where the stabilized diode laser device includes a unibody mounting plate and several chambers aligned along a transmission axis. Various optic components are placed in the chambers, and based on a transmission through the chambers, the optic components are aligned and secured within the chambers.

Abstract: It is necessary to reduce the power consumption of a plurality of optical amplifiers when there is a difference in the required pumping power between the plurality of optical amplifiers; therefore, an optical amplifying apparatus according to an exemplary aspect of the invention includes a plurality of optical amplifying means for amplifying a plurality of optical signals, each of the plurality of optical amplifying means including a gain medium; a plurality of laser light generating means for generating a plurality of laser beams; at least one optical coupling means for coupling the plurality of laser beams variably in accordance with a coupling factor and outputting a plurality of excitation light beams, each of the plurality of excitation light beams exciting the gain medium; and controlling means for controlling the coupling factor and an output power of each of the plurality of laser light generating means.

Abstract: A light emitting unit includes a light emitting sealed body and a voltage application circuit. The light emitting sealed body includes a container to which laser light for maintaining plasma is incident and from which light from the plasma is emitted, a first electrode which includes a first discharge portion, and a second electrode which includes a second discharge portion. An end portion of the first discharge portion has a shape in which a thickness is thinned as it goes toward the second discharge portion and an end surface of the second discharge portion extends along a plane perpendicular to an extending direction of the first discharge portion. The voltage application circuit controls a potential difference between the first electrode and the second electrode by adjusting a voltage applied to at least the first electrode.

Abstract: A gas laser device includes a shielding plate that is a first shielding member, and a shielding plate that is a second shielding member. The first shielding member includes a first opening, and a second opening. A laser beam that is to be propagated to discharge regions passes through the first opening. The laser beam that has taken a round trip through the discharge regions after passing through the first opening passes through the second opening. The second shielding plate faces the first shielding member the discharge regions located therebetween. The shielding plate includes an opening that is a third opening. The laser beam that has been propagated through the first opening and the discharge regions, and the laser beam that is to be propagated to the second opening through the discharge regions pass through the third opening. A plane shape of the third opening includes a rectilinear segment.

Abstract: Impingement cooling devices for a laser disk include a carrier plate on the front side of which the laser disk can be secured, and a supporting structure, on the front side of which the rear side of the carrier plate is secured. The supporting structure has a plurality of cooling liquid feed lines from which the cooling liquid emerges in the direction of the rear side of the carrier plate and a plurality of cooling liquid return lines. The feed and return lines run parallel to one another in the longitudinal direction of the supporting structure, and the supporting structure includes a plurality of cutouts or the rear side of the carrier plate that are open toward the supporting structure, and the cooling liquid feed lines lead into and the cooling liquid return lines lead away from the plurality of cutouts.

Abstract: An integrated Fourier domain mode-locked optoelectronic oscillator and its application and a communication system are provided, which relates to the technical field of microwave photonics. The integrated Fourier domain mode-locked optoelectronic oscillator includes an optoelectronic chip and an electronic chip. The optoelectronic chip includes a laser, a modulator, an optical notch filter, and a photodetector coupled via an optical waveguide. The electronic chip includes an electrical amplifier and a power splitter coupled via a coplanar microwave waveguide. The volume, weight and power consumption of the Fourier domain mode-locked optoelectronic oscillator is greatly reduced by integrating all the devices on the chip. A tunable sweeping microwave signal output is realized, and the sweeping speed of the output signal is increased. The integrated Fourier domain mode-locked optoelectronic oscillator can be used in radars and communication systems.

Abstract: A light-emitting-element housing member includes: a bottom base material having a first surface, and a mounting part on the first surface on which a light emitting element is to be mounted; and a frame member that includes side walls erected on the first surface to surround the mounting part, and an opening that penetrates through one of the side walls. The opening includes an inner edge having a first side and a second side, the first side extends along the first surface and is arranged at a position close to the bottom base material, and the second side extends along the first surface and is arranged at a position far from the bottom base material, and the second side is longer than the first side. An array of the plurality of light-emitting-element housing members, and a light emitting device are also described.

Abstract: A non-reciprocal optical assembly for injection locking a laser to a resonator is described. The laser emits a light beam, and the resonator receives the light beam and returns a feedback light beam to the laser such that the feedback light beam causes injection locking. The non-reciprocal optical assembly is interposed between and optically coupled to the laser and the resonator. The non-reciprocal optical assembly includes a first port that receives the light beam from the laser, and a second port that outputs the light beam to the resonator and receives the feedback light beam from the resonator. The first port also outputs the feedback light beam to the laser. The light beam passes through the non-reciprocal optical assembly with a first power loss, and the feedback light beam passes through the non-reciprocal optical assembly with a second power loss (the first power loss differs from the second power loss).

Abstract: An optoelectronic component comprising a laser diode is disclosed.

Abstract: A stem for a semiconductor package, includes an eyelet having a first surface, a second surface opposite to the first surface, and a through-hole penetrating the eyelet from the first surface to the second surface, a metal base bonded to the second surface of the eyelet so as to cover one end of the through-hole, and a metal block having one end thereof inserted into the through-hole and bonded to the metal base inside the through-hole, and another end projecting from the first surface of the eyelet and including a device mounting surface on which a semiconductor device is mounted. The metal base has a thermal conductivity higher than or equal to a thermal conductivity of the eyelet, and a surface at the one end of the metal block matches the second surface of the eyelet.

Abstract: A laser cleaning system including a laser source, an energy-transferring optical fiber, a laser cleaning head, a coreless motor, a connection lens barrel, and a mirror.

Abstract: Gallium nitride based devices and, more particularly to the generation of holes in gallium nitride based devices lacking p-type doping, and their use in light emitting diodes and lasers, both edge emitting and vertical emitting. By tailoring the intrinsic design, a wide range of wavelengths can be emitted from near-infrared to mid ultraviolet, depending upon the design of the adjacent cross-gap recombination zone. The innovation also provides for novel circuits and unique applications, particularly for water sterilization.

Abstract: A semiconductor optical device includes: a laser for emitting light; a modulator for modulating the light using an electroabsorption effect; a chip capacitor that is electrically connected in parallel to the laser; a chip inductor that is electrically connected in series to the chip capacitor, is electrically connected in series to the laser and the chip capacitor as a whole, and includes a first terminal and a second terminal; a solder or a conductive adhesive that directly bonds the first terminal of the chip inductor and the chip capacitor to each other; an electrical wiring group in which the laser, the modulator, the chip capacitor, and the chip inductor are electrically connected to each other; and a substrate on which the laser, the modulator, the chip capacitor, and the chip inductor are mounted.

Abstract: A device may determine at least one metric related to a plurality of laser pulses associated with a Q-switched laser. The device may determine a statistical metric for the at least one metric related to the plurality of laser pulses. The device may determine that the statistical metric satisfies a threshold level of deviation of the at least one metric related to the plurality of laser pulses from a baseline value for the at least one metric. The device may indicate laser degradation of the Q-switched laser based on determining that the statistical metric satisfies the threshold.

Abstract: A system including two dimensional, microelectromechanical system (MEMS) based spatial light modulators and anamorphic optics for improved contrast is provided. Generally, the system comprises an array of modulators having a plurality of pixels along a longitudinal axis, each pixel comprising a plurality of modulators along a transverse axis of the array. An illumination source including a laser and anamorphic optics for focuses light from the laser onto the array, and imaging optics focus modulated light from the array onto an image plane. The anamorphic optics are configured to provide a transverse numerical aperture (NA) along the transverse axis of the array that is smaller than a diffraction angle of the modulated light reflected from the array along a transverse axis of the image plane, and a longitudinal NA along the longitudinal axis of the array that is greater than the transverse NA. Other embodiments are also provided.