摘要:
A semiconductor laser module includes a semiconductor device in which at least a semiconductor laser and a bending waveguide are integrated, a beam splitter, and a plurality of detectors. The laser light emitted from the semiconductor laser propagates through the bending waveguide, the laser light emitted through the bending waveguide is input to the beam splitter, a part of the laser light input to the beam splitter is branched by the beam splitter, and the part of the laser light branched is detected by the detectors arranged at different positions in the cross section of a light flux of the part of the laser light. In this semiconductor laser module, a waveform shaping unit configured to make a relation between an output of the semiconductor laser and detection values of the detectors approach a linear relation is provided on an optical path. With this configuration, a wavelength locking control can be stably performed with a high degree of accuracy.
摘要:
The invention relates to sources of optical radiation wherein polarized radiation from first (301) and second (302) rows of light emitters (20a-f) is first collimated and combined into two combined beam using first (311) and second (312) rows of collimating and beam re-directing elements (26a-f), respectively, and then polarization multiplexed in a polarizer (86) with the help of a half-wave plate (85) to form a polarization-multiplexed output beam. In order to reduce the footprint, emitters of the first (301) and second (302) emitter rows are disposed in an interleaved, staggered arrangement, and the second row (312) of collimating and beam re-directing elements is disposed in a space between the first emitter (301) row and the first row (311) of collimating and beam re-directing elements. The multiplexed output beam is focused (88) into an optical fibre (99).
摘要:
The invention relates to a light guide for transmitting radiation, in particular the radiation from a high power diode laser, and to a method for producing the same. The light guide is characterized by a gap-shaped elongated light entry surface consisting of one or more layers of optical fibers, wherein the fibers are at least partly connected to one another and to a carrier plate in a form-fitting manner. The invention further relates to a method for producing the light guide according to the invention.
摘要:
An apparatus for measuring properties of physical matters by means of Raman spectroscopy including a laser element, a wavelength dispersion element, an array or single element detector, and a control and data processing unit. The laser element, which is used to excite Raman scattering, is spectrum narrowed and stabilized by attachment of a Bragg grating device. The grating can be either a volume Bragg grating (VBG) written inside a glass substrate or a fiber Bragg grating (FBG) written inside an optical fiber. A laser element can be provided with a wavelength modulation capability for fluorescence background suppression.
摘要:
In einer Laserpumpanordnung für ein Laserstrahlung verstärkendes Lasermedium mit mindestens einer Laser-Pumpquelle (1'') mit mehreren Emittern zur Erzeugung von Teilpumpstrahlen (TPS1'' ,TPS2'') werden durch eine Einkopplungsoptik die Teilpumpstrahlen (TPS1'',TPS2'') in einen Homogenisator (3'') geführt und dort in einer Achse durch multiple Reflexionen durchmischt. Hierbei sind Homogenisator (3'') und Lasermedium so ausgebildet und angeordnet, dass der aus dem Homogenisator (3'') austretende Pumpstrahl unter Divergenzerhaltung in der Durchmischungsachse (DA) unmittelbar auf oder in das Lasermedium geführt wird, wobei die Teilpumpstrahlen (TPS1'',TPS2'') in einer zur Durchmischungsachse (DA) senkrechten Projektionsachse (PA) direkt auf oder in das Lasermedium projiziert, insbesondere fokussiert werden.
摘要:
The invention relates to a laser array that is suitable for injecting laser light into at least one optical fiber. Said laser array comprises a plurality of laser light sources (100-113) which are placed at a distance from a light incidence surface of the at least one optical fiber, and a diaphragm (700) which is suitable for spatially defining the laser light emitted during operation of the laser light sources (100-113) before the same is injected into the at least one optical fiber. The laser light sources (100-113) encompass at least one group of first laser light sources (100-106) and at least one group of second laser light sources (107-113). The inventive laser array further comprises coupling means that are suitable for coupling the laser light together during operation of the first and second laser light sources (100-106, 107-113) before the laser light enters the at least one optical fiber.
摘要:
A thermal processing system includes a source of laser radiation emitting at a laser wavelength, beam projection optics disposed between the reflective surface and a substrate support capable of holding a substrate to be processed, a pyrometer responsive to a pyrometer wavelength, and a wavelength responsive optical element having a first optical path for light in a first wavelength range including the laser wavelength, the first optical path being between the source of laser radiation and the beam projection optics, and a second optical path for light in a second wavelength range including the pyrometer wavelength, the second optical path being between the beam projection optics and the pyrometer. The system can further include a pyrometer wavelength blocking filter between the source of laser radiation and the wavelength responsive optical element.