DE4042440C2 - SOLID LASER - Google Patents

SOLID LASER

Info

Publication number
DE4042440C2
DE4042440C2 DE19904042440 DE4042440A DE4042440C2 DE 4042440 C2 DE4042440 C2 DE 4042440C2 DE 19904042440 DE19904042440 DE 19904042440 DE 4042440 A DE4042440 A DE 4042440A DE 4042440 C2 DE4042440 C2 DE 4042440C2
Authority
DE
Germany
Prior art keywords
laser
crystal
resonator
crystals
frequency
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.)
Expired - Fee Related
Application number
DE19904042440
Other languages
German (de)
Other versions
DE4042440A1 (en
Inventor
Stefan Heinemann
Axel Dipl Ing Mehnert
Peter Dr Peuser
Nikolaus Dipl Phys Schmitt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus Defence and Space GmbH
Original Assignee
Deutsche Aerospace AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Deutsche Aerospace AG filed Critical Deutsche Aerospace AG
Priority to DE19904042440 priority Critical patent/DE4042440C2/en
Priority claimed from DE19904041131 external-priority patent/DE4041131A1/en
Publication of DE4042440A1 publication Critical patent/DE4042440A1/en
Application granted granted Critical
Publication of DE4042440C2 publication Critical patent/DE4042440C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
    • H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
    • H01S3/109—Frequency multiplication, e.g. harmonic generation
    • 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/105—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length
    • 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/0602—Crystal lasers or glass lasers
    • H01S3/0604—Crystal lasers or glass lasers in the form of a plate or disc
    • 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
    • H01S3/09415—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping

Description

Die Erfindung bezieht sich auf einen von Laserdioden gepumpten Festkörperlaser mit longitudinalem Einmodenbetrieb im sichtbaren Wellenlängenbereich gemäß dem Gattungsbegriff des Anspruchs 1.The invention relates to a solid-state laser pumped by laser diodes with longitudinal single-mode operation in the visible wavelength range according to the preamble of claim 1.

Ein solcher Laser ist durch die DE 40 41 131 A1 bekannt. Der hier offenbarte Festkörperlaser ist als Mikrokristall-Laser anzusprechen, welcher bei einer mechanisch einfachen Ausführung sowohl eine Frequenzverdopplung und Frequenzmischung, als auch eine Abstimmung und Modulation der Grundwellenlänge und zweiten Harmonischen bei effizientem "Single Frequency" Betrieb gewährleistet.Such a laser is known from DE 40 41 131 A1. This here disclosed solid-state laser can be addressed as a micro-crystal laser, which in a mechanically simple version both frequency doubling and frequency mixing, as well as tuning and modulating the Basic wavelength and second harmonic with efficient "single frequency" Operation guaranteed.

Ein Mikrokristallaser mit internem frequenzverdoppelnden Kristall ist aus der EP 04 55 383 A2 bekannt und weiterhin ist der US-Zeitschrift: "Opt. Letters", Vol. 12, No. 12, Dec. 1987, S. 999-1001 ein Mikrokristallaser zu entnehmen, der eine piezoelektrische Frequenzabstimmung des Lasers aufweist. Eine resonatorinterne Frequenzverdopplung ist aus diesem Stand der Technik nicht ersichtlich.A micro crystal fiber with an internal frequency doubling crystal is off EP 04 55 383 A2 and the US magazine: "Opt. Letters ", Vol. 12, No. 12, Dec. 1987, pp. 999-1001 a microcrystalline fiber refer to the piezoelectric frequency tuning of the laser having. An internal doubling of the frequency is from this state the technology is not apparent.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, unter Beibehaltung der Eigenschaften des vorgenannten Mikrokristall-Lasers, einen solchen zu schaffen, mit dem eine erweiterte Abstimmung und Modulation der grund- und frequenzverdoppelten oder frequenzgemischten Wellenlänge ermöglicht wird.The present invention has for its object, while maintaining the properties of the aforementioned micro crystal laser create with which an advanced tuning and modulation of the basic and frequency-doubled or frequency-mixed wavelength is made possible.

Diese Aufgabe wird durch die im Patentanspruch aufgezeigten Maßnahmen gelöst. Nachfolgend ist ein Ausführungsbeispiel beschrieben und in der einzigen Figur der Zeichnung skizziert, die ein Schemabild eines halbmonolithischen, abstimmbaren Mikrokristall-Lasers im sichtbaren Wellenlängenbereich veranschaulicht.This object is achieved by the measures indicated in the claim solved. An embodiment is described below and in the sketched single figure of the drawing, which is a schematic image of a semi-monolithic, tunable micro-crystal laser in the visible wavelength range illustrated.

Das in der Figur skizzierte Ausführungsbeispiel zeigt einen Resonator des vorgenannten Festkörperlasers 10, der aus einem Laserkristall 11, der als einseitig einkoppelnder Spiegel S1 ausgebildet ist und einem nichtlinearen Kristall 12 gebildet ist, der einseitig als Auskoppelspiegel S2 ausgebildet ist, wobei die Kristalle 11 und 12 nach Schliff, Beschichtung und Montage die Ausbildung einer Resonatormode gewährleisten, wie dies in der vorgenannten Druckschrift bereits ausgeführt ist. Mit 14 ist die Pumplicht- Laserdiode bezeichnet.The exemplary embodiment outlined in the figure shows a resonator of the aforementioned solid-state laser 10 , which is formed from a laser crystal 11 , which is designed as a mirror S1 which is coupled in on one side, and a non-linear crystal 12, which is formed on one side as a coupling-out mirror S2, the crystals 11 and 12 After grinding, coating and assembly, ensure the formation of a resonator mode, as has already been stated in the aforementioned publication. With 14 the pump light laser diode is designated.

Claims (1)

Festkörperlaser, der im sichtbaren Wellenlängenbereich betrieben wird, dessen Festkörpermaterial, bestehend aus einem einseitig als Einkoppelspiegel verspiegelten Laserkristall und einem nichtlinearen Kristall, optisch mittels Laserdioden gepumpt wird und das Pumplicht longitudinal in die Resonatormode fokussiert wird, wobei der Resonator des Festkörperlasers aus einem Laserkristall, der an seiner der Laserdiode zugewandten Seite als Einkoppelspiegel ausgebildet ist und einem nichtlinearen Kristall, welcher an seiner der Laserdiode abgewandten Seite als Auskoppelspiegel ausgeführt ist, gebildet wird und eine Resonatorlänge von <1 mm aufweist, wobei Kristalle nach Schliff, Beschichtung und Montage die Ausbildung einer Resonatormode gewährleisten und zur Bildung eines Laserresonators beide Kristalle optisch kontaktiert sind, dadurch gekennzeichnet, daß der Laserkristall (11) und der nichtlineare Kristall (12) räumlich voneinander getrennt angeordnet und die einander gegenüberliegenden Flächen der beiden Kristalle (11, 12) mit einer bei der Grund-, Laser- und Pumpwellenlänge antireflektierenden (AR) Schicht (S3) versehen sind und dem nichtlinearen Kristall (12) eine mit einem HF-Generator (17) versehene Piezokeramik (16) zugeordnet ist, womit eine Abstimmung und Modulation der grund- und der frequenzverdoppelten oder frequenzgemischten Wellenlänge unter Beibehaltung der spezifischen Eigenschaften eines Mikrokristalls gewährleistet wird.Solid-state laser, which is operated in the visible wavelength range, the solid material, consisting of a laser crystal mirrored on one side as a coupling mirror and a non-linear crystal, is optically pumped by means of laser diodes and the pump light is focused longitudinally into the resonator mode, the resonator of the solid-state laser consisting of a laser crystal is formed on its side facing the laser diode as a coupling mirror and a nonlinear crystal, which is designed as a coupling mirror on its side facing away from the laser diode, and has a resonator length of <1 mm, crystals after grinding, coating and assembly forming a resonator mode ensure and to form a laser resonator both crystals are optically contacted, characterized in that the laser crystal ( 11 ) and the non-linear crystal ( 12 ) are spatially separated from each other and the opposite areas of the two crystals ( 11, 12 ) are provided with an (AR) layer (S3) that is anti-reflective at the basic, laser and pump wavelength and the nonlinear crystal ( 12 ) is provided with a piezoceramic (HF) generator ( 17 ) ( 16 ) is assigned, which ensures tuning and modulation of the fundamental and frequency-doubled or frequency-mixed wavelengths while maintaining the specific properties of a microcrystalline.
DE19904042440 1990-12-21 1990-12-21 SOLID LASER Expired - Fee Related DE4042440C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19904042440 DE4042440C2 (en) 1990-12-21 1990-12-21 SOLID LASER

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904041131 DE4041131A1 (en) 1990-12-21 1990-12-21 Solid body laser with longitudinal unimodal operation - has resonator contg. laser crystal and nonlinear crystal which guarantee resonator mode formation
DE19904042440 DE4042440C2 (en) 1990-12-21 1990-12-21 SOLID LASER

Publications (2)

Publication Number Publication Date
DE4042440A1 DE4042440A1 (en) 1992-07-09
DE4042440C2 true DE4042440C2 (en) 1993-11-04

Family

ID=25899639

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19904042440 Expired - Fee Related DE4042440C2 (en) 1990-12-21 1990-12-21 SOLID LASER

Country Status (1)

Country Link
DE (1) DE4042440C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19702146A1 (en) * 1996-01-22 1997-07-24 Nec Corp Laser diode pumped solid state laser apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4229500A1 (en) * 1992-09-04 1994-03-10 Deutsche Aerospace Solid-state hybrid laser system - with laser diode chip and associated cooling and temp. regulation elements contained in standard housing
DE4306919C2 (en) * 1993-03-05 1995-10-05 Daimler Benz Aerospace Ag Method of tuning a monolithic single-frequency micro crystal laser
US7505488B2 (en) 2001-09-28 2009-03-17 Raytheon Company Synthetic aperture ladar with chirped modelocked waveform

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5063566A (en) * 1990-04-30 1991-11-05 Amoco Corporation Internally-doubled, composite-cavity microlaser

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19702146A1 (en) * 1996-01-22 1997-07-24 Nec Corp Laser diode pumped solid state laser apparatus

Also Published As

Publication number Publication date
DE4042440A1 (en) 1992-07-09

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