DE19523267A1 - Vertical cavity surface emitting laser module for transmitter in long wavelength region - Google Patents
Vertical cavity surface emitting laser module for transmitter in long wavelength regionInfo
- Publication number
- DE19523267A1 DE19523267A1 DE19523267A DE19523267A DE19523267A1 DE 19523267 A1 DE19523267 A1 DE 19523267A1 DE 19523267 A DE19523267 A DE 19523267A DE 19523267 A DE19523267 A DE 19523267A DE 19523267 A1 DE19523267 A1 DE 19523267A1
- Authority
- DE
- Germany
- Prior art keywords
- vcsel
- laser module
- transmission element
- emitting transmission
- surface emitting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/42—Arrays of surface emitting lasers
- H01S5/423—Arrays of surface emitting lasers having a vertical cavity
- H01S5/426—Vertically stacked cavities
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/041—Optical pumping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0233—Mounting configuration of laser chips
- H01S5/0234—Up-side down mountings, e.g. Flip-chip, epi-side down mountings or junction down mountings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0235—Method for mounting laser chips
- H01S5/02355—Fixing laser chips on mounts
- H01S5/0237—Fixing laser chips on mounts by soldering
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
Abstract
Description
Die Erfindung betrifft ein Lasermodul mit einem oberflächenemittierenden Sendeelement für den langwelligen Bereich und mit einem Träger.The invention relates to a laser module with a surface-emitting transmission element for long-wave Area and with a carrier.
Es wurden oberflächenemittierende Laserdioden mit senkrechtem Resonator (VCSEL: vertical cavity surface emitting laserdiode) entwickelt. Im Unterschied zu einer kantenemittierenden Laserdiode, deren Strahltaille einen Durchmesser um einen µm hat, ist bei der oberflächenemittierenden Laserdiode die Strahltaille mit ungefähr 9 bis 10 µm so groß wie die einer Einmodenfaser. Dadurch läßt sich ohne Transformation des Strahls bei einer Kopplung zwischen Laserdiode und Einmodenfaser ein nahezu hundertprozentiger Koppelwirkungsgrad erreichen. Die Abstrahlrichtung ist entsprechend der Ausrichtung des Resonators senkrecht zur Oberfläche der Laserdiode. Durch den Einsatz mikrostrukturierter Siliziumsubstrate und oberflächenemittierender Sendeelemente ist eine Reduzierung der Kosten durch Einsparung von aktiven Justagetechniken bei der Ankopplung zwischen Lichtleitfaser und Sendeelement möglich. Zum Einsatz von oberflächenemittierenden Sendeelementen, beispielsweise in der Übertragungstechnik, ist es notwendig, daß diese eine ausreichende Lebensdauer im Dauerbetrieb aufweisen. Bisher sind nur oberflächenemittierende Sendeelemente im kurzwelligen Bereich mit zufriedenstellenden Kennwerten hergestellt worden. Ein Dauerbetrieb von oberflächenemittierenden Sendeelementen, die Licht im langwelligen Bereich emittieren, erscheint zur Zeit nicht realisierbar. Eines der grundlegenden Probleme stellt dabei die Wärmeabfuhr dar. Da aufgrund der schlechteren Güte der aktiven Schichten von oberflächenemittierenden Sendeelementen für den langwelligen Bereich, diese mit einer höheren Energie gepumpt werden müssen, muß auch mehr Wärme abgeführt werden. Da aber materialbedingt eine schlechtere Wärmekopplung vorliegt, treten thermische Probleme auf, die die Lebensdauer der oberflächenemittierenden Sendeelemente für den langwelligen Bereich im Dauerbetrieb begrenzen.There were surface emitting laser diodes vertical resonator (VCSEL: vertical cavity surface emitting laser diode). Unlike one edge emitting laser diode, the beam waist one Has a diameter of one µm, is the surface emitting laser diode with the beam waist about 9 to 10 µm as large as that of a single mode fiber. This allows one to transform the beam without transforming it Coupling between laser diode and single-mode fiber an almost achieve 100 percent coupling efficiency. The Beam direction is according to the orientation of the Resonators perpendicular to the surface of the laser diode. By the use of microstructured silicon substrates and surface-emitting transmission elements is a reduction costs by saving active adjustment techniques in the coupling between optical fiber and transmission element possible. For the use of surface emitting Transmission elements, for example in transmission technology, it is necessary that they have a sufficient lifespan in the Have continuous operation. So far only surface-emitting transmission elements in the short-wave Area with satisfactory parameters been. Continuous operation of surface emitting Transmitting elements that emit light in the long-wave range emit does not currently appear to be feasible. One of the heat dissipation represents fundamental problems due to the poorer quality of the active layers of surface-emitting transmission elements for long-wave Area, these are pumped with higher energy more heat must be dissipated. Here but there is poorer heat coupling due to the material, thermal problems occur that affect the life of the surface-emitting transmission elements for long-wave Limit the area in continuous operation.
Es ist Aufgabe der Erfindung, ein Lasermodul mit einem oberflächenemittierenden Sendeelement für den langwelligen Bereich anzugeben, das bei Zimmertemperatur im Dauerbetrieb betrieben werden kann.It is an object of the invention to provide a laser module with a surface-emitting transmission element for long-wave Specify range that at room temperature in continuous operation can be operated.
Die Aufgabe wird durch ein Lasermodul mit den Merkmalen des Patentanspruches 1 gelöst. Vorteilhafte Weiterbildungen sind in den Unteransprüchen angegeben.The task is carried out by a laser module with the characteristics of Claim 1 solved. Advantageous further developments are specified in the subclaims.
Das oberflächenemittierende Sendeelement des Lasermoduls wird nicht direkt mit einem Injektionsstrom elektrisch gepumpt, sondern optisch von einem zweiten oberflächenemittierenden Sendeelement, das Licht im kurzwelligen Bereich emittiert. Damit entfallen die thermischen Probleme, die üblicherweise beim direkten elektrischen Pumpen von oberflächenemittierenden Sendeelementen für den langwelligen Bereich auftreten. Durch den Einsatz eines oberflächenemittierenden Sendelementes für den kurzwelligen Bereich als Pumpquelle wird eine schnelle Modulierbarkeit des Lasermoduls erreicht. Aufgrund der geringen Divergenz des Ausgangsstrahls des oberflächenemittierenden Sendeelementes ist eine gute Strahlverkopplung zu realisieren. Bei der Ankopplung des Lasermoduls an eine Faser ist keine aktive Justage notwendig. Außerdem können optische Bauelemente zur Strahlanpassung eingespart werden. Eine gute Pumpeffizienz kann erzielt werden, indem in der aktiven Zone des oberflächenemittierenden Sendeelements für den langwelligen Bereich eine GRIN-SCH-MQW-Struktur vorgesehen wird, deren Claddingmaterial im Bandabstand auf die Wellenlänge des Pumplichts angepaßt ist. Ein Ausführungsbeispiel der Erfindung wird anhand der Figur erläutert.The surface emitting transmitter element of the laser module does not become electrical directly with an injection current pumped but optically from a second surface emitting transmission element, the light in emitted short-wave range. This eliminates the thermal problems that are common with direct electric pumps from surface emitting Transmitting elements for the long-wave range occur. By the use of a surface emitting element for the short-wave range as a pump source becomes a fast one Modulability of the laser module achieved. Due to the low divergence of the output beam of the surface emitting element is a good one Realize beam coupling. When coupling the Laser module on a fiber is not an active adjustment necessary. In addition, optical components for Beam adjustment can be saved. Good pumping efficiency can be achieved by in the active zone of the surface-emitting transmission element for long-wave Area a GRIN-SCH-MQW structure is provided, the Cladding material in the band gap to the wavelength of the Pump lights is adjusted. An embodiment of the Invention is explained with reference to the figure.
Auf einem Träger T befindet sich ein oberflächenemittierendes Sendeelement VCSEL, das Licht im kurzwelligen Bereich emittiert. Die Wellenlänge λ1 liegt zwischen 850 und 950 nm. Das oberflächenemittierende Sendeelement für den kurzwelligen Bereich VCSEL ist mittels flip-chip-bonding FCB auf dem Träger T montiert. Es weist Halbleiterschichten HL1 und zwei Spiegel S1 und S2 auf. Als Kontakt ist auf der Oberfläche eine Goldschicht K vorgesehen, die auch zur Abstrahlung von Wärme dient. Das Licht aus dem oberflächenemittierenden Sendeelement für den kurzwelligen Bereich VCSEL mit der Wellenlänge λ₁ dringt durch den Träger T und trifft auf das zweite oberflächenemittierende Sendeelement VCSEL′, das für den langwelligen Bereich geeignet ist. Dieses Sendeelement baut sich ebenfalls aus den Halbleiterschichten HL2 und zwei Spiegeln S3 und S4 auf. Es ist auf die Rückseite des Trägers T montiert. Licht der Wellenlänge λ1, dringt durch die Spiegel S3 in die aktiven Halbleiterschichten ein. Von den aktiven Halbleiterschichten wird Licht der zweiten Wellenlänge λ2 beispielsweise 1300 nm oder 1550 nm emittiert.A is located on a carrier T. surface-emitting transmission element VCSEL, the light in the emitted short-wave range. The wavelength λ1 is between 850 and 950 nm. The surface emitting Transmitting element for the short-wave range VCSEL is by means of flip-chip-bonding FCB mounted on the carrier T. It points Semiconductor layers HL1 and two mirrors S1 and S2. As Contact is a gold layer K on the surface provided that also serves to radiate heat. The Light from the surface emitting element for the short-wave area VCSEL penetrates with the wavelength λ₁ through the carrier T and meets the second surface-emitting transmission element VCSEL ′, which for the long-wave range is suitable. This sending element is building also consist of the semiconductor layers HL2 and two Mirror S3 and S4. It is on the back of the carrier T mounted. Light of wavelength λ1 penetrates through the Mirror S3 in the active semiconductor layers. Of the active semiconductor layers becomes light of the second Wavelength λ2, for example 1300 nm or 1550 nm emitted.
Es wird ein monolithisch oder hybrid integriertes Bauelement vorgeschlagen, indem Halbleitermaterialien mit unterschiedlichen Gitterkonstanten und Bandabständen eingesetzt werden. Um einen durch einen elektrischen Strom gepumpten VCSE-Laser, ein oberflächenemittierendes Sendeelement, für den kurzwelligen Bereich herzustellen, werden auf GaAs angepaßte Epitaxieschichten eingesetzt. Die Emission dieser Schichten wird auf einen zweiten Halbleiterbereich, der auf Indiumphosphid angepaßte Epitaxieschichten enthält, abgebildet und dort zum optischen Pumpen einer VCSE-Laserstruktur für den langwelligen Bereich verwendet.It becomes a monolithic or hybrid integrated component proposed by using semiconductor materials different lattice constants and band gaps be used. To you by an electric current pumped VCSE laser, a surface emitting Transmitter element to manufacture for the short-wave range, epitaxial layers adapted to GaAs are used. The Emission of these layers is on a second Semiconductor area, adapted to indium phosphide Contains epitaxial layers, imaged and there for optical Pumping a VCSE laser structure for the long-wave range used.
Claims (9)
es ist ein Träger (T) vorgesehen, auf dem Träger (T) befindet sich ein oberflächenemittierendes Sendeelement (VCSEL), das Licht im kurzwelligen Bereich emittiert, das oberflächenemittierende Sendeelement (VCSEL) für den kurzwelligen Bereich ist als Pumpquelle für das oberflächenemittierende Sendeelement (VCSEL′) für den langwelligen Bereich eingesetzt.1. Laser module with a surface-emitting transmission element (VCSEL ′) for the long-wave range with the following features:
a carrier (T) is provided, on the carrier (T) there is a surface-emitting transmission element (VCSEL) that emits light in the short-wave range, the surface-emitting transmission element (VCSEL) for the short-wave range is used as a pump source for the surface-emitting transmission element (VCSEL ') Used for the long-wave range.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19523267A DE19523267A1 (en) | 1995-06-27 | 1995-06-27 | Vertical cavity surface emitting laser module for transmitter in long wavelength region |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19523267A DE19523267A1 (en) | 1995-06-27 | 1995-06-27 | Vertical cavity surface emitting laser module for transmitter in long wavelength region |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19523267A1 true DE19523267A1 (en) | 1997-01-02 |
Family
ID=7765332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19523267A Withdrawn DE19523267A1 (en) | 1995-06-27 | 1995-06-27 | Vertical cavity surface emitting laser module for transmitter in long wavelength region |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19523267A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19748989A1 (en) * | 1997-11-06 | 1999-07-15 | Daimler Chrysler Ag | Optical transmit / receive module |
GB2342773A (en) * | 1998-10-17 | 2000-04-19 | Mitel Semiconductor Ab | Long wavelength vertical cavity laser with integrated short wavelength pump laser |
EP0999621A1 (en) * | 1998-11-05 | 2000-05-10 | Gore Enterprise Holdings, Inc. | Semiconductor device with aligned oxide apertures and contact to an intervening layer |
EP1037341A2 (en) * | 1999-03-05 | 2000-09-20 | Agilent Technologies Inc | Optically pumped VCSEL |
EP1211764A2 (en) * | 2000-10-31 | 2002-06-05 | Agilent Technologies, Inc. (a Delaware corporation) | System for optically pumping a long wavelength laser using a short wavelength laser |
FR2833758A1 (en) * | 2001-12-13 | 2003-06-20 | Commissariat Energie Atomique | MICRO-CAVITY LIGHT EMITTING DEVICE AND METHOD OF MANUFACTURING THE SAME |
DE10312742A1 (en) * | 2002-11-29 | 2004-06-17 | Osram Opto Semiconductors Gmbh | Optically pumped semiconductor laser arrangement comprises vertically emitting laser having emitter layer producing radiation, and pumped beam source for optically pumping laser |
WO2010034279A1 (en) * | 2008-09-25 | 2010-04-01 | Osram Opto Semiconductors Gmbh | Optoelectronic component |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4999842A (en) * | 1989-03-01 | 1991-03-12 | At&T Bell Laboratories | Quantum well vertical cavity laser |
EP0488510A2 (en) * | 1990-11-28 | 1992-06-03 | Mitsubishi Denki Kabushiki Kaisha | Visible light surface emitting laser device |
DE4142704A1 (en) * | 1991-11-14 | 1993-05-19 | Daimler Benz Ag | Laser diode modulator - has laser active zone pumped by pump light of equal or smaller wavelength. Preferably a second laser beam. |
WO1993014514A1 (en) * | 1992-01-21 | 1993-07-22 | Bandgap Technology Corporation | Vertical-cavity surface emitting laser optical interconnect technology |
EP0622876A1 (en) * | 1993-04-30 | 1994-11-02 | Fujitsu Limited | Vertical cavity laser diode |
WO1995007564A1 (en) * | 1993-09-10 | 1995-03-16 | Telefonaktiebolaget Lm Ericsson | Optical amplifying device |
EP0651477A1 (en) * | 1993-10-29 | 1995-05-03 | France Telecom | Integrated surface emitting laser device |
-
1995
- 1995-06-27 DE DE19523267A patent/DE19523267A1/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4999842A (en) * | 1989-03-01 | 1991-03-12 | At&T Bell Laboratories | Quantum well vertical cavity laser |
EP0488510A2 (en) * | 1990-11-28 | 1992-06-03 | Mitsubishi Denki Kabushiki Kaisha | Visible light surface emitting laser device |
DE4142704A1 (en) * | 1991-11-14 | 1993-05-19 | Daimler Benz Ag | Laser diode modulator - has laser active zone pumped by pump light of equal or smaller wavelength. Preferably a second laser beam. |
WO1993014514A1 (en) * | 1992-01-21 | 1993-07-22 | Bandgap Technology Corporation | Vertical-cavity surface emitting laser optical interconnect technology |
EP0622876A1 (en) * | 1993-04-30 | 1994-11-02 | Fujitsu Limited | Vertical cavity laser diode |
WO1995007564A1 (en) * | 1993-09-10 | 1995-03-16 | Telefonaktiebolaget Lm Ericsson | Optical amplifying device |
EP0651477A1 (en) * | 1993-10-29 | 1995-05-03 | France Telecom | Integrated surface emitting laser device |
Non-Patent Citations (2)
Title |
---|
LE,H.Q., et.al.: High-power diode-laser-pumped midwave infrared HgCdTe/CdZnTe quantum-well lasers. In: Appl.Phys.Lett.65 (7), 15.Aug.1994, S.810-812 * |
PEUSER,Peter, et.al.: Diodengepumpte Festkörperlaser, Springer-Verlag, Berlin, 1995, S.73 * |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19748989A1 (en) * | 1997-11-06 | 1999-07-15 | Daimler Chrysler Ag | Optical transmit / receive module |
GB2342773A (en) * | 1998-10-17 | 2000-04-19 | Mitel Semiconductor Ab | Long wavelength vertical cavity laser with integrated short wavelength pump laser |
EP0999621A1 (en) * | 1998-11-05 | 2000-05-10 | Gore Enterprise Holdings, Inc. | Semiconductor device with aligned oxide apertures and contact to an intervening layer |
US6314118B1 (en) | 1998-11-05 | 2001-11-06 | Gore Enterprise Holdings, Inc. | Semiconductor device with aligned oxide apertures and contact to an intervening layer |
US6372533B2 (en) | 1998-11-05 | 2002-04-16 | Gore Enterprise Holdings, Inc. | Method of making a semiconductor device with aligned oxide apertures and contact to an intervening layer |
EP1037341A2 (en) * | 1999-03-05 | 2000-09-20 | Agilent Technologies Inc | Optically pumped VCSEL |
EP1037341A3 (en) * | 1999-03-05 | 2001-09-05 | Agilent Technologies Inc. a Delaware Corporation | Optically pumped VCSEL |
EP1211764A3 (en) * | 2000-10-31 | 2003-05-14 | Agilent Technologies, Inc. (a Delaware corporation) | System for optically pumping a long wavelength laser using a short wavelength laser |
EP1211764A2 (en) * | 2000-10-31 | 2002-06-05 | Agilent Technologies, Inc. (a Delaware corporation) | System for optically pumping a long wavelength laser using a short wavelength laser |
FR2833758A1 (en) * | 2001-12-13 | 2003-06-20 | Commissariat Energie Atomique | MICRO-CAVITY LIGHT EMITTING DEVICE AND METHOD OF MANUFACTURING THE SAME |
WO2003050927A3 (en) * | 2001-12-13 | 2004-04-15 | Commissariat Energie Atomique | Micro-cavity light emitting device and method for making same |
US7154929B2 (en) | 2001-12-13 | 2006-12-26 | Commissariat A L'energie Atomique | Micro-cavity light emitting device and method for making same |
DE10312742A1 (en) * | 2002-11-29 | 2004-06-17 | Osram Opto Semiconductors Gmbh | Optically pumped semiconductor laser arrangement comprises vertically emitting laser having emitter layer producing radiation, and pumped beam source for optically pumping laser |
DE10312742B4 (en) * | 2002-11-29 | 2005-09-29 | Osram Opto Semiconductors Gmbh | Optically pumped semiconductor laser device |
WO2010034279A1 (en) * | 2008-09-25 | 2010-04-01 | Osram Opto Semiconductors Gmbh | Optoelectronic component |
US8811448B2 (en) | 2008-09-25 | 2014-08-19 | Osram Opto Semiconductors Gmbh | Optoelectronic component |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102013204964B4 (en) | Optically pumped surface emitting lasers with high reflectivity reflector and limited bandwidth | |
DE60006416T2 (en) | OPTICALLY PUMPED SEMICONDUCTOR LASER WITH RESONATOR INTERNAL FREQUENCY CONVERSION | |
DE69219322T2 (en) | SEMICONDUCTOR LASER SYSTEM WITH EXTERNAL RESONATOR | |
DE60002387T2 (en) | Optically pumped VCSEL | |
EP2005542B1 (en) | Optoelectronic semiconductor element | |
EP3291387A1 (en) | Low power edge-emitting laser diode and laser diode module | |
DE19646015A1 (en) | Surface-emitting vertical cavity laser with transparent substrate, manufactured by semiconductor wafer bonding | |
EP1601026B1 (en) | Optoelectronic semiconductor device and method for its production | |
DE10214120B4 (en) | Optically pumpable surface emitting semiconductor laser device | |
DE69401699T2 (en) | Semiconductor laser that uses a nonlinear crystal to generate second harmonic light within the laser resonator | |
WO2020212221A1 (en) | Semiconductor laser and material machining method using a semiconductor laser | |
DE102005015148A1 (en) | laser device | |
DE102016014938A1 (en) | Light-emitting device based on a photonic crystal with columnar or wall-shaped semiconductor elements, and method for their operation and manufacture | |
DE19523267A1 (en) | Vertical cavity surface emitting laser module for transmitter in long wavelength region | |
DE102019106674A1 (en) | Device and method for projecting a plurality of focal points onto a surface | |
WO2021228660A1 (en) | Semiconductor laser component and method for operating at least one semiconductor laser | |
DE60113041T2 (en) | System for optically pumping a long-wavelength laser with a short-wave laser | |
WO2021180461A1 (en) | Optoelectronic semiconductor laser component and optoelectronic arrangement | |
DE3410729A1 (en) | Stabilised semiconductor laser | |
DE69603002T2 (en) | Laser diode with a narrow beam angle characteristic | |
EP1454392B1 (en) | Method and device for producing laser radiation based on semiconductors | |
DE102022115367A1 (en) | SEMICONDUCTOR LASER DEVICE | |
WO1998022999A9 (en) | Laser system and amplifying system to produce single-frequency laser irradiation | |
DE19647677A1 (en) | Laser and amplifier system for generating single-frequency laser radiation | |
DE102021113856A1 (en) | OPTOELECTRONIC SEMICONDUCTOR CHIP AND COMPONENT |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8139 | Disposal/non-payment of the annual fee |