WO1986003066A1 - Compensation de birefringence dans des lasers couples par polarisation - Google Patents

Compensation de birefringence dans des lasers couples par polarisation Download PDF

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Publication number
WO1986003066A1
WO1986003066A1 PCT/AU1985/000274 AU8500274W WO8603066A1 WO 1986003066 A1 WO1986003066 A1 WO 1986003066A1 AU 8500274 W AU8500274 W AU 8500274W WO 8603066 A1 WO8603066 A1 WO 8603066A1
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WO
WIPO (PCT)
Prior art keywords
prism
porro
phase shift
laser
reflector
Prior art date
Application number
PCT/AU1985/000274
Other languages
English (en)
Inventor
James Richards
Original Assignee
The Commonwealth Of Australia Care Of The Assistan
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 The Commonwealth Of Australia Care Of The Assistan filed Critical The Commonwealth Of Australia Care Of The Assistan
Priority to GB08615952A priority Critical patent/GB2178891B/en
Publication of WO1986003066A1 publication Critical patent/WO1986003066A1/fr

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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
    • H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
    • H01S3/1123—Q-switching
    • H01S3/115—Q-switching using intracavity electro-optic devices
    • 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
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/08004—Construction or shape of optical resonators or components thereof incorporating a dispersive element, e.g. a prism for wavelength selection

Definitions

  • the invention comprises a circular laser rod in a cavity defined at a first end by a zero phase shift Porro or compound TIR prism,
  • FIG. 1 is a schematic diagram of a first form of thee iinnvveennttiioonn using a compound TIR and the 45 optical rotator,
  • FIG. 2 is a similar view using a zero phase shift Porro in place of the compound TIR prism and a quarter wave plate in place of the optical rotator,
  • FIG. 3 is a similar view using a compound TIR prism and a half waveplate in place of the optical rotator or 20. quarter wave plate.
  • FIG. 4 shows the variation in output coupling for a laser geometry similar to FIG. 1 the (a) to (f) sub-figures indicating progressive rotation at 15 intervals, and
  • FIG. 5 shows the variation at various Porro phase shifts for a laser geometry similar to FIG. 2.
  • FIG. 1 A schematic diagram of the laser resonator is shown in FIG. 1.
  • the essential components include
  • a plane polariser 1 a circular laser rod 2, a 45° optical rotator 3 and a ⁇ /2 phase shift Porro prism 4.
  • the prism 4 shown is a compound TIR prism previously patented for laser use (Aust. patent application PCT/AU82/00045) as it has the required ⁇ /2 phase shift.
  • the laser include an electro-optic Pockels cell 5 and a 100% reflector 6, either a mirror or Porro prism being suitable.
  • ⁇ is the angle of the TIR's or Porro's roof edge and the pass plane of the polariser.
  • the beam returning to the polariser passes through a different region of the laser rod than the outgoing beam due to the reflecting properties of the TIR or Porro prism.
  • the retardance 5. is unchanged but the azimuth orientation is altered to (2 ⁇ - p), giving a matrix of cos — sin - cos(4e - 2p) i sin - sin (4 ⁇ - 2P) 2
  • FIG. 2 A schematic diagram of this laser configuration is shown in FIG. 2. It has similar components to the configuration described above and uses similar
  • ⁇ is the angle of the Porro's roof edge and the pass plane of the polariser.
  • the components required for this compensation scheme include a zero phase shift Porro prism. This component must be manufactured by applying suitable phase shifting dielectric coatings to the totally internally reflecting surfaces of the Porr.o prism, 15. see Venning above ' .
  • the other components are commonly encountered in polarisation coupled lasers.
  • FIG. 3 A schematic diagram of this laser configuration is shown in FIG. 3. It has similar components to the 20. configurations described above except that the half wave plate 9 is placed between the laser rod 2 and the Porro prism 4, which in this case must be a ⁇ /2 phase shift Porro. Analysis of this configuration by the Jones calculus reveals that compensation is perfect .25. provided that a relative orientation of 22.5 degrees between the azimuth directions of the half wave plate and Porro is main ⁇ tained. Further by rotating the half wave plate-Porro prism combination various output coupling values between zero and 1007> can be achieved, the output being again 5. given by
  • ⁇ is the angle of the Porro's roof edge and the pass plane of the polariser.
  • optical equivalence of laser configuration C to configurations A and B can be demonstrated by noting 10. that the effect of the half waveplate at ( ⁇ - 22.5°) and ⁇ /2 Porro prism oriented at ⁇ is the product of the following three matrices.
  • FIG. 4 shows the variation in output coupling for a laser geometry similar to that shown in FIG. 1 except that the
  • FIG. 4a shows the result for zero rotation i.e. the same as a conventional uncompensated- configuration
  • FIG. 5 In this case the output coupling variations are shown as the phase shift of the Porro prism is varied from zero to ⁇ /2 with increments of ⁇ /10. As in the results shown in FIG. 4 the orientation of the Porro is varied to provide the same output coupling in
  • phase shift Porro that is for the same geometry as in configuration B, that compensation is perfect.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)

Abstract

Dans un laser couplé par polarisation à biréfrigence compensée, une cavité désamorcée entre deux réflecteurs totaux (4-6) contient une tige circulaire (2) de laser, un polarisateur (1) et une cellule de Pockels (5). Des éléments rotateurs optiques (3-4, (4-9) ou (7-8) sont formés à une extrémité adjacente à la tige de laser (2) et comprennent soit un rotateur optique (3) soit une plaque de quart d'onde (7) ou de demi-onde (9).
PCT/AU1985/000274 1984-11-09 1985-11-08 Compensation de birefringence dans des lasers couples par polarisation WO1986003066A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08615952A GB2178891B (en) 1984-11-09 1985-11-08 Birefringence compensation in polarisation coupled lasers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPG8061 1984-11-09
AUPG806184 1984-11-09

Publications (1)

Publication Number Publication Date
WO1986003066A1 true WO1986003066A1 (fr) 1986-05-22

Family

ID=3770837

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1985/000274 WO1986003066A1 (fr) 1984-11-09 1985-11-08 Compensation de birefringence dans des lasers couples par polarisation

Country Status (2)

Country Link
GB (1) GB2178891B (fr)
WO (1) WO1986003066A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0383638A2 (fr) * 1989-02-17 1990-08-22 Spectra-Physics Lasers, Inc. Oscillateur-amplificateur laser avec compensation de la biréfringence induite par contrainte
EP0402570A2 (fr) * 1989-06-14 1990-12-19 Matsushita Electric Industrial Co., Ltd. Dispositif laser à bande étroite
EP0489956A1 (fr) * 1990-12-12 1992-06-17 Matsushita Electric Industrial Co., Ltd. Appareil laser à bande étroite
FR2673491A1 (fr) * 1991-03-01 1992-09-04 Bourgogne Universite Resonateur optique et oscillateur laser en anneau a elements polarisants.
US5150370A (en) * 1989-06-14 1992-09-22 Matsushita Electric Industrial Co., Ltd. Narrow-band laser apparatus
WO1995022187A1 (fr) * 1994-02-15 1995-08-17 Coherent, Inc. Systeme permettant de minimiser la depolarisation d'un faisceau laser due a la birefringence induite par la chaleur
WO2001052367A1 (fr) * 2000-01-13 2001-07-19 Raytheon Company Compensateur de birefringence thermique pour laser a double passage
DE4415511B4 (de) * 1994-05-03 2006-04-27 Wittrock, Ulrich, Prof. Dr. Laseranordnung zur Kompensation der Doppelbrechung und der Bifokussierung in Lasermedien
WO2019081334A1 (fr) * 2017-10-26 2019-05-02 Silltec Source laser a solide
RU191113U1 (ru) * 2019-05-15 2019-07-24 Федеральное государственное бюджетное учреждение науки Научно-технологический центр уникального приборостроения Российской академии наук (НТЦ УП РАН) Импульсный твердотельный лазер
CN115513759A (zh) * 2022-11-17 2022-12-23 北京镭宝光电技术有限公司 激光器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1224318A (en) * 1967-06-30 1971-03-10 Atomic Energy Authority Uk Improvements in or relating to lasers
US3757249A (en) * 1972-02-15 1973-09-04 Atomic Energy Commission Q switched mode locked laser oscillator
JPS5676587A (en) * 1979-11-28 1981-06-24 Tech Res & Dev Inst Of Japan Def Agency Pulse laser device
US4305046A (en) * 1978-07-12 1981-12-08 Agence Nationale De La Valorisation De La Recherche (Anvar) Selective optical resonator
US4408334A (en) * 1981-03-13 1983-10-04 The United States Of America As Represented By The Secretary Of The Navy Waveplate for correcting thermally induced stress birefringence in solid state lasers
US4461009A (en) * 1981-09-15 1984-07-17 The United States Of America As Represented By The Secretary Of The Navy Output coupler for laser resonator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1224318A (en) * 1967-06-30 1971-03-10 Atomic Energy Authority Uk Improvements in or relating to lasers
US3757249A (en) * 1972-02-15 1973-09-04 Atomic Energy Commission Q switched mode locked laser oscillator
US4305046A (en) * 1978-07-12 1981-12-08 Agence Nationale De La Valorisation De La Recherche (Anvar) Selective optical resonator
JPS5676587A (en) * 1979-11-28 1981-06-24 Tech Res & Dev Inst Of Japan Def Agency Pulse laser device
US4408334A (en) * 1981-03-13 1983-10-04 The United States Of America As Represented By The Secretary Of The Navy Waveplate for correcting thermally induced stress birefringence in solid state lasers
US4461009A (en) * 1981-09-15 1984-07-17 The United States Of America As Represented By The Secretary Of The Navy Output coupler for laser resonator

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0383638A2 (fr) * 1989-02-17 1990-08-22 Spectra-Physics Lasers, Inc. Oscillateur-amplificateur laser avec compensation de la biréfringence induite par contrainte
US4955725A (en) * 1989-02-17 1990-09-11 Spectra Physics Laser oscillator/amplifier with compensation for stress birefringence
EP0383638A3 (fr) * 1989-02-17 1991-10-02 Spectra-Physics Lasers, Inc. Oscillateur-amplificateur laser avec compensation de la biréfringence induite par contrainte
EP0402570A2 (fr) * 1989-06-14 1990-12-19 Matsushita Electric Industrial Co., Ltd. Dispositif laser à bande étroite
EP0402570A3 (fr) * 1989-06-14 1991-09-11 Matsushita Electric Industrial Co., Ltd. Dispositif laser à bande étroite
US5150370A (en) * 1989-06-14 1992-09-22 Matsushita Electric Industrial Co., Ltd. Narrow-band laser apparatus
EP0489956A1 (fr) * 1990-12-12 1992-06-17 Matsushita Electric Industrial Co., Ltd. Appareil laser à bande étroite
FR2673491A1 (fr) * 1991-03-01 1992-09-04 Bourgogne Universite Resonateur optique et oscillateur laser en anneau a elements polarisants.
WO1995022187A1 (fr) * 1994-02-15 1995-08-17 Coherent, Inc. Systeme permettant de minimiser la depolarisation d'un faisceau laser due a la birefringence induite par la chaleur
US5504763A (en) * 1994-02-15 1996-04-02 Coherent, Inc. System for minimizing the depolarization of a laser beam due to thermally induced birefringence
DE4415511B4 (de) * 1994-05-03 2006-04-27 Wittrock, Ulrich, Prof. Dr. Laseranordnung zur Kompensation der Doppelbrechung und der Bifokussierung in Lasermedien
WO2001052367A1 (fr) * 2000-01-13 2001-07-19 Raytheon Company Compensateur de birefringence thermique pour laser a double passage
US6317450B1 (en) 2000-01-13 2001-11-13 Raytheon Company Reeder compensator
WO2019081334A1 (fr) * 2017-10-26 2019-05-02 Silltec Source laser a solide
FR3073098A1 (fr) * 2017-10-26 2019-05-03 Silltec Source laser a solide
RU191113U1 (ru) * 2019-05-15 2019-07-24 Федеральное государственное бюджетное учреждение науки Научно-технологический центр уникального приборостроения Российской академии наук (НТЦ УП РАН) Импульсный твердотельный лазер
CN115513759A (zh) * 2022-11-17 2022-12-23 北京镭宝光电技术有限公司 激光器

Also Published As

Publication number Publication date
GB8615952D0 (en) 1986-08-06
GB2178891B (en) 1988-07-06
GB2178891A (en) 1987-02-18

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