JPS6313386A - Short-pulse laser beam generator - Google Patents
Short-pulse laser beam generatorInfo
- Publication number
- JPS6313386A JPS6313386A JP61157430A JP15743086A JPS6313386A JP S6313386 A JPS6313386 A JP S6313386A JP 61157430 A JP61157430 A JP 61157430A JP 15743086 A JP15743086 A JP 15743086A JP S6313386 A JPS6313386 A JP S6313386A
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic
- total reflection
- light
- laser
- reflection mirror
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 5
- 230000010355 oscillation Effects 0.000 claims abstract description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052786 argon Inorganic materials 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 229910003327 LiNbO3 Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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
- H01S3/117—Q-switching using intracavity acousto-optic devices
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、極めて短いパルス幅のレーザ光を出力するこ
とができる短パルスレーザ光発生装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a short-pulse laser light generating device that can output laser light with an extremely short pulse width.
（従来の技術）
超音波光偏向器（ブラッグセル）を用いた短パルスレー
ザ光発生装置が知られている。(Prior Art) A short pulse laser light generation device using an ultrasonic light deflector (Bragg cell) is known.
第２図は、前記短パルスレーザ光発生装置の構成を示す
略図である。FIG. 2 is a schematic diagram showing the configuration of the short pulse laser beam generator.
平面全反射ミラー２１、レーザ管１．凹面全反射ミラー
２２および２４、凹面全反射ミラー２２と凹面全反射ミ
ラー２４間に配置された超音波ブラッグセル２３から構
成されている。Planar total reflection mirror 21, laser tube 1. It consists of concave total reflection mirrors 22 and 24 and an ultrasonic Bragg cell 23 arranged between the concave total reflection mirror 22 and the concave total reflection mirror 24.
この装置において全反射ミラー２１と凹面全反射ミラー
２４がレーザ共鳴器を構成している。In this device, a total reflection mirror 21 and a concave total reflection mirror 24 constitute a laser resonator.
線１１．１２はレーザ発振光の経路を示している。Lines 11 and 12 indicate the path of laser oscillation light.
凹面全反射ミラー２２と凹面全反射ミラー２４により前
記レーザ光はその間の１点に集光させられており、その
集光点に前記ブラッグセル２３が配置されている。The laser beam is focused on one point between the concave total reflection mirror 22 and the concave total reflection mirror 24, and the Bragg cell 23 is disposed at the convergence point.
前記ブラッグセルが動作していないとき装置は、レーザ
共鳴器にとどまっていてレーザ光は外にでることができ
ない。When the Bragg cell is not operating, the device remains in the laser resonator and no laser light can exit.
ところが、一定の波長をもつ超音波の進行波を短時間だ
け前記ブラッグセル２３内に発生させると、はぼその時
間に対応した短パルス光２０が得られる。However, if a traveling wave of ultrasonic waves having a fixed wavelength is generated within the Bragg cell 23 for a short period of time, a short pulse light 20 corresponding to an approximate period of time is obtained.
前述した構成で、５０ｎｓの短パルス光を得ている。With the above-described configuration, short pulse light of 50 ns is obtained.
（発明が解決しようとする問題点）
このような装置では、外にパルス光を取り出すために、
３枚のミラーを使っているので、必然的に装置全体が大
きなものとなってしまうという欠点がある。(Problem to be solved by the invention) In such a device, in order to extract pulsed light to the outside,
Since three mirrors are used, the disadvantage is that the entire device is inevitably large.
本発明の目的は、より小型の装置でより短いパルス間隔
の光を取り出すことができる短パルスレーザ光発生装置
を提供することにある。An object of the present invention is to provide a short-pulse laser light generating device that can extract light with a shorter pulse interval using a smaller device.
（問題点を解決するための手段）
前記目的を達成するために、本発明による短パルスレー
ザ光発生装置は、相対する第１および第２の凹面全反射
ミラーより構成されているレーザ共鳴器内に前記第１の
凹面全反射ミラー側から順に分光プリズム、レーザ管、
超音波光偏向器をこの順番に配置し、超音波光偏向器を
駆動して短時間レーザ光を外部に取り出すように構成さ
れている。(Means for Solving the Problems) In order to achieve the above object, a short pulse laser light generating device according to the present invention includes a laser resonator that is configured of opposing first and second concave total reflection mirrors. In order from the first concave total reflection mirror side, a spectroscopic prism, a laser tube,
The ultrasonic beam deflectors are arranged in this order, and the ultrasonic beam deflectors are driven to take out the laser beam to the outside for a short time.
前記２枚の凹面全反射ミラーと前記超音波光偏向器は、
前記超音波光偏向器中の１点にレーザ光が集光する位置
関係を保って配置され、前記超音波光偏向器は前記点上
に超音波進行波を発生させるように駆動され短時間だけ
ブラッグ反射して短パルスを取り出すように構成するこ
とができる。The two concave total reflection mirrors and the ultrasonic optical deflector are
The ultrasonic light deflector is arranged such that the laser beam is focused on one point in the ultrasonic light deflector, and the ultrasonic light deflector is driven to generate an ultrasonic traveling wave on the point for a short time. It can be configured to take out short pulses by Bragg reflection.
前記分光プリズムは前記第２の凹面全反射ミラーと一体
に設けることができ、分光プリズムにブリュースタ角で
入射する光の成分のみをレーザ発振に寄与させることが
できる。The spectroscopic prism can be provided integrally with the second concave total reflection mirror, and only the component of the light incident on the spectroscopic prism at Brewster's angle can contribute to laser oscillation.
前記超音波光偏向器は、２つの超音波トランスデユーサ
を用い、第１の超音波トランスデユーサにより発生させ
られた超音波進行波によりブラッグ反射した光を第２の
超音波トランスデユーサにより発生させられた超音波進
行波で再度ブラッグ反射させるように構成することがで
きる。The ultrasonic optical deflector uses two ultrasonic transducers, and uses the second ultrasonic transducer to reflect Bragg-reflected light from an ultrasonic traveling wave generated by the first ultrasonic transducer. The generated ultrasonic traveling wave can be configured to cause Bragg reflection again.
（実施例）
以下、図面等を参照して本発明をさらに詳しく説明する
。(Example) Hereinafter, the present invention will be described in more detail with reference to the drawings and the like.
第１図は、本発明による短パルスレーザ光発生装置の実
施例を示す図であって、同図（Ａ）は平面図、同図（Ｂ
）は側面図である。FIG. 1 is a diagram showing an embodiment of a short pulse laser beam generator according to the present invention, in which (A) is a plan view and (B) is a plan view.
) is a side view.
この実施例は、全反射ミラ一つきのプリズム３でＰ偏光
のアルゴン放電光を分光して、そのうちから５１４５人
の光のみがレーザ発Ｉ辰し、しかもそのレーザ光がレー
ザ共鳴器内におかれたブラングセル２により短時間だけ
偏向されて短パルス光としてレーザ装面の外に取り出さ
れるようにしたものである。In this example, P-polarized argon discharge light is split into spectra using a prism 3 with a single total reflection mirror, and only the light of 5145 people is emitted as a laser, and that laser light is placed inside a laser resonator. The light is deflected for a short time by the blank cell 2 and extracted as short pulse light to the outside of the laser device surface.
全反射ミラ一つきのプリズム３は合成石英でできている
。Prism 3 with one total reflection mirror is made of synthetic quartz.
このプリズム３には５１４５人の光がフ゛リュースタ角
で入射すると、５１４５人の光のみが、相対する全反射
ミラー４に戻れる角度位置に配置されている。When the lights of 5,145 people are incident on this prism 3 at a fistor angle, only the lights of the 5,145 people are arranged at an angular position where they can return to the opposing total reflection mirror 4.
プリズム３の全反射ミラー３ａと全反射ミラー４は共に
凹面ミラーであって、レーザ管１と全反射ミラー４との
間で発振レーザ光１１．１２が１点０に集光するように
なっている。Both the total reflection mirror 3a and the total reflection mirror 4 of the prism 3 are concave mirrors, and the oscillated laser beams 11 and 12 are focused on one point 0 between the laser tube 1 and the total reflection mirror 4. There is.
超音波ブラッグセル２は、厚さ１８μｍのＬｉＮｂＯ３
結晶でできた超音波トランスデユーサＴ１およびＴ２が
互いに相対する面にはりつけられている。The ultrasonic Bragg cell 2 is made of LiNbO3 with a thickness of 18 μm.
Ultrasonic transducers T1 and T2 made of crystals are attached to opposite sides.
超音波トランスデユーサＴ１には、図示されていない高
周波電源により、周波数６５０ＭＨｚ、時間幅７ｎｓの
バースト波が印加されると、ブラッグセル２の内部に波
長９μｍ、長さ４２μｍの超音波進行波Ｓ１が発生させ
られる。When a burst wave with a frequency of 650 MHz and a duration of 7 ns is applied to the ultrasonic transducer T1 by a high frequency power source (not shown), an ultrasonic traveling wave S1 with a wavelength of 9 μm and a length of 42 μm is generated inside the Bragg cell 2. be caused to occur.
同様に超音波トランスデユーサＴ２により超音波進行波
Ｓ１とは進行方向が逆で、波長が８１より少し短かいが
、長さは同じ超音波進行波Ｓ２が発生させられる。Similarly, the ultrasonic transducer T2 generates an ultrasonic traveling wave S2 whose traveling direction is opposite to that of the ultrasonic traveling wave S1, whose wavelength is a little shorter than 81, but whose length is the same.
前記超音波進行波Ｓ１が、前記レーザ集光点０を通過す
るようにブラッグセル２はおかれている。The Bragg cell 2 is placed so that the ultrasonic traveling wave S1 passes through the laser focal point 0.
したがって、トランスデユーサが駆動されると、時間幅
が約６ｎｓのレーザパルス光が、本来のレーザビームの
方向から２度ずれた方向に向かう。Therefore, when the transducer is driven, the laser pulse light having a duration of approximately 6 ns is directed in a direction that is deviated by 2 degrees from the original direction of the laser beam.
超音波進行波Ｓ１とはわずかに遅れて８２が発生し、前
記パルス光が本来のレーザビームの方向と約０．１変異
なるように、時間とＴ２に印加する周波数とを調整する
。The time and the frequency applied to T2 are adjusted so that the pulsed light 82 is generated with a slight delay from the ultrasonic traveling wave S1, and the pulsed light differs from the original laser beam direction by about 0.1.
これにより、前記パルス光は、前記レーザ管１を通過し
、ミラ一つきプリズム３のミラー３ａがつけられていな
い位置を通過して外にでることができる。Thereby, the pulsed light can pass through the laser tube 1, pass through the position of the single-mirror prism 3 where the mirror 3a is not attached, and exit.
すなわち、時間幅が約５ ｎ ｓのレーザパルス光２０
を発生させることができる。That is, the laser pulse light 20 with a time width of about 5 ns
can be generated.
（発明の効果）
以上詳しく説明したように、本発明による類パルスレー
ザ光発生装置は、相対する第１および第２の凹面全反射
ミラーより構成されているレーザ共鳴器内に前記第１の
凹面全反射ミラー側から順に分光プリズム、レーザ管、
超音波光偏向器をこの順番に配置し、超音波光偏向器を
駆動して短時間レーザ光を外部に取り出すように構成さ
れている。(Effects of the Invention) As described above in detail, the similar pulse laser light generating device according to the present invention has the first concave surface in a laser resonator constituted by opposing first and second concave total reflection mirrors. Spectroscopic prism, laser tube,
The ultrasonic light deflectors are arranged in this order, and the ultrasonic light deflectors are driven to extract laser light to the outside for a short time.
したがって、従来の装置より簡潔な装置により、短パル
スレーザ光を発生できる。Therefore, short pulse laser light can be generated using a simpler device than conventional devices.
第１図は、本発明による短パルスレーザ光発生装置の実
施例を示す図であって、同図（Ａ）は平面図、同図（Ｂ
）は側面図である。
第２図は、従来の短パルスレーザ光発生装置を示す略図
である。
１・・・レーザ管
２．２３・・・超音波光偏向器（ブラッグセル）３・・
・凹面全反射ミラ一つきプリズム４．２４・・・凹面全
反射ミラー
１１．１２・・・レーザの通常発振光
２０・・・短パルスレーザ光
２１・・・平面全反射ミラー
特許出願人 浜松ホトニクス株式会社
代理人 弁理士 井 ノ ロ 壽
２２図
！
手続ネｉ■正書
■凝ロ６１年 ８月２９日FIG. 1 is a diagram showing an embodiment of a short pulse laser beam generator according to the present invention, in which (A) is a plan view and (B) is a plan view.
) is a side view. FIG. 2 is a schematic diagram showing a conventional short pulse laser beam generator. 1...Laser tube 2.23...Ultrasonic light deflector (Bragg cell) 3...
- Prism with one concave total reflection mirror 4.24...Concave total reflection mirror 11.12...Normal oscillation light of laser 20...Short pulse laser beam 21...Flat total reflection mirror Patent applicant Hamamatsu Photonics Agent Co., Ltd. Patent Attorney Hisashi Inoro 22 pictures! Procedural Nei ■Authentic Book■Kuroro August 29, 1961
Claims (4)
構成されているレーザ共鳴器内に前記第１の凹面全反射
ミラー側から順に分光プリズム、レーザ管、超音波光偏
向器をこの順番に配置し、超音波光偏向器を駆動して短
時間レーザ光を外部に取り出すように構成した短パルス
レーザ光発生装置。(1) A spectroscopic prism, a laser tube, and an ultrasonic optical deflector are installed in this order from the first concave total reflection mirror side into a laser resonator composed of opposing first and second concave total reflection mirrors. A short-pulse laser light generating device configured to be placed in a 100-degree space and drive an ultrasonic light deflector to extract laser light to the outside for a short period of time.
器は、前記超音波光偏向器中の１点にレーザ光が集光す
る位置関係を保って配置され、前記超音波光偏向器は前
記点上に超音波進行波を発生させるように駆動され短時
間だけブラッグ反射して短パルスを取り出す特許請求の
範囲第１項記載の短パルスレーザ光発生装置。(2) The two concave total reflection mirrors and the ultrasonic light deflector are arranged in a positional relationship such that the laser beam is focused on one point in the ultrasonic light deflector, and the ultrasonic light deflector is 2. The short pulse laser light generating device according to claim 1, wherein the device is driven to generate an ultrasonic traveling wave on the point and undergoes Bragg reflection for a short period of time to extract a short pulse.
と一体に設けられており、分光プリズムにブリュースタ
角で入射する光の成分のみをレーザ発振に寄与させるよ
うにした特許請求の範囲第１項記載の短パルスレーザ光
発生装置。(3) The spectroscopic prism is provided integrally with the second concave total reflection mirror, and only the component of light incident on the spectroscopic prism at Brewster's angle contributes to laser oscillation. 2. The short pulse laser light generating device according to item 1.
ューサを用い第１の超音波トランスデューサにより発生
させられた超音波進行波によりブラッグ反射した光を第
２の超音波トランスデューサにより発生させられた超音
波進行波で再度ブラッグ反射させるように構成した特許
請求の範囲第１項記載の短パルスレーザ光発生装置。(4) The ultrasonic light deflector uses two ultrasonic transducers, and the second ultrasonic transducer generates Bragg-reflected light from the ultrasonic traveling wave generated by the first ultrasonic transducer. 2. The short-pulse laser light generating device according to claim 1, which is configured to cause Bragg reflection again using an ultrasonic traveling wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61157430A JPS6313386A (en) | 1986-07-04 | 1986-07-04 | Short-pulse laser beam generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61157430A JPS6313386A (en) | 1986-07-04 | 1986-07-04 | Short-pulse laser beam generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6313386A true JPS6313386A (en) | 1988-01-20 |
Family
ID=15649467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61157430A Pending JPS6313386A (en) | 1986-07-04 | 1986-07-04 | Short-pulse laser beam generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6313386A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999020996A1 (en) * | 1997-10-21 | 1999-04-29 | Trustee's Of Princeton University | Optical resonator for cavity ring-down spectroscopy with prism retroreflectors |
| US6172823B1 (en) | 1997-10-21 | 2001-01-09 | Trustees Of Princeton University | Mode matching for cavity ring-down spectroscopy based upon Brewster's angle prism retroreflectors |
| US6172824B1 (en) | 1997-10-21 | 2001-01-09 | Trustees Of Princeton University | Low loss prism retroreflectors for relative index of refraction less than the square root of 2 |
| US7046362B2 (en) | 2001-12-12 | 2006-05-16 | Trustees Of Princeton University | Fiber-optic based cavity ring-down spectroscopy apparatus |
| US7277177B2 (en) | 2002-05-13 | 2007-10-02 | Tiger Optics, Llc | System and method for controlling a light source for cavity ring-down spectroscopy |
| US7318909B2 (en) | 2001-12-12 | 2008-01-15 | Trustees Of Princeton University | Method and apparatus for enhanced evanescent field exposure in an optical fiber resonator for spectroscopic detection and measurement of trace species |
| US7352468B2 (en) | 2001-12-12 | 2008-04-01 | Trustees Of Princeton University | Cavity ring-down detection of surface plasmon resonance in an optical fiber resonator |
-
1986
- 1986-07-04 JP JP61157430A patent/JPS6313386A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999020996A1 (en) * | 1997-10-21 | 1999-04-29 | Trustee's Of Princeton University | Optical resonator for cavity ring-down spectroscopy with prism retroreflectors |
| US5973864A (en) * | 1997-10-21 | 1999-10-26 | Trustees Of Princeton University | High-finesse optical resonator for cavity ring-down spectroscopy based upon Brewster's angle prism retroreflectors |
| US6097555A (en) * | 1997-10-21 | 2000-08-01 | Trustees Of Princeton University | High-finesse optical resonator for cavity ring-down spectroscopy based upon Brewster's angle prism retroreflectors |
| US6172823B1 (en) | 1997-10-21 | 2001-01-09 | Trustees Of Princeton University | Mode matching for cavity ring-down spectroscopy based upon Brewster's angle prism retroreflectors |
| US6172824B1 (en) | 1997-10-21 | 2001-01-09 | Trustees Of Princeton University | Low loss prism retroreflectors for relative index of refraction less than the square root of 2 |
| US7046362B2 (en) | 2001-12-12 | 2006-05-16 | Trustees Of Princeton University | Fiber-optic based cavity ring-down spectroscopy apparatus |
| US7318909B2 (en) | 2001-12-12 | 2008-01-15 | Trustees Of Princeton University | Method and apparatus for enhanced evanescent field exposure in an optical fiber resonator for spectroscopic detection and measurement of trace species |
| US7352468B2 (en) | 2001-12-12 | 2008-04-01 | Trustees Of Princeton University | Cavity ring-down detection of surface plasmon resonance in an optical fiber resonator |
| US7504068B2 (en) | 2001-12-12 | 2009-03-17 | Trustees Of Princeton University | Apparatus for enhanced evanescent field exposure in an optical fiber resonator for spectroscopic detection and measurement of trace species |
| US7504263B2 (en) | 2001-12-12 | 2009-03-17 | Trustees Of Princeton University | Method for enhanced evanescent field exposure in an optical fiber resonator for spectroscopic detection and measurement of trace species |
| US7277177B2 (en) | 2002-05-13 | 2007-10-02 | Tiger Optics, Llc | System and method for controlling a light source for cavity ring-down spectroscopy |
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