JPS63139307A - Optical axis adjusting method for luminous body module - Google Patents

Optical axis adjusting method for luminous body module

Info

Publication number
JPS63139307A
JPS63139307A JP28805586A JP28805586A JPS63139307A JP S63139307 A JPS63139307 A JP S63139307A JP 28805586 A JP28805586 A JP 28805586A JP 28805586 A JP28805586 A JP 28805586A JP S63139307 A JPS63139307 A JP S63139307A
Authority
JP
Japan
Prior art keywords
light source
light
lens system
optical fiber
focus
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
Application number
JP28805586A
Other languages
Japanese (ja)
Inventor
Kenji Tagawa
憲治 田川
Takayuki Masuko
益子 隆行
Shigeki Watanabe
茂樹 渡辺
▲う▼野 三郎
Saburou Asano
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP28805586A priority Critical patent/JPS63139307A/en
Publication of JPS63139307A publication Critical patent/JPS63139307A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To adjust an optical axis by a visual observation, by setting a relative position of a curved-face mirror and a dummy light source, and a curvature of the curved-face mirror, so that a focus of a light beam from the dummy light source, which is made incident on a lens system through the curved-face mirror coincides with a focus of a light source CONSTITUTION:A light source 1 outputs parallel rays A, and a lens system 2 is placed on an optical path of said parallel rays A. In this state, an output light of a dummy light source 5 is made incident on the lens system through a curved-face mirror 4 having a convex reflecting surface, therefore, a chromatic aberration of the lens system is corrected, and a focus of the dummy light source 5 coincides with a focus of the light source 1. Accordingly, an optical fiber 3 can be positioned by a visual observation so that the core center of the end face of the optical fiber 3 is positioned in this focus. Subsequently, after the optical axis adjustment has been completed by positioning the optical fiber 3, the curved-face mirror 4 is moved to a position of a broken line, by which a luminous body module which can couple an output light of the light source 1 to the optical fiber 3 is formed.

Description

【発明の詳細な説明】 概   要 光源から出力された平行光線をレンズ系により光ファイ
バに結合するようにした発光体モジュールの光軸調整に
際し、光源とレンズ系間に曲面鏡を配置し、光源と同一
ビーム径の可視光を出力するダミー光源からの光を°前
記曲面鏡で反射させ、レンズ系における前記反射光の焦
点が光源の焦点と一致すべく、曲面鏡とダミー光源の相
対位置及び曲面鏡の曲率を設定し、この焦点に光フアイ
バ端面のコア中心を配置するようにして、発光体モジュ
ールが可視光用であるか否かにかかわらず、目視による
光軸調整を可能とする。
[Detailed Description of the Invention] Overview When adjusting the optical axis of a light emitter module that couples parallel light beams output from a light source to an optical fiber using a lens system, a curved mirror is placed between the light source and the lens system, and the light source Light from a dummy light source that outputs visible light with the same beam diameter as is reflected by the curved mirror, and the relative position of the curved mirror and the dummy light source and By setting the curvature of the curved mirror and arranging the core center of the end face of the optical fiber at the focal point, it is possible to visually adjust the optical axis regardless of whether the light emitter module is for visible light or not.

産業上の利用分野 本発明は、光ファイバを伝送路とする光通信システムに
使用する発光体モジュール、特に可視光範囲外の光源を
用いてなる発光体モジュールに適した光軸調整方法に関
する。
INDUSTRIAL APPLICATION FIELD The present invention relates to an optical axis adjustment method suitable for a light emitter module used in an optical communication system using an optical fiber as a transmission line, and particularly for a light emitter module using a light source outside the visible light range.

光ファイバを伝送路とする光逼信システムの送借倒にお
いては、時系列の電気信号でLD(半導体レーザ)及び
LED <発光ダイオード)等の発光体を駆動して時系
列の光パルスを形成し、この光信号をレンズ系を介して
光ファイバに導くようにしている。発光体、レンズ系、
及び接続用の光ファイバは、通常、発光体モジュールと
して一体化されており、実用的な発光体モジュールを提
供するために、簡便な光軸調整方法が要望されている。
In the transmission and transfer of optical transmission systems using optical fibers as transmission lines, time-series electrical signals are used to drive light-emitting bodies such as LDs (semiconductor lasers) and LEDs (light-emitting diodes) to form time-series optical pulses. This optical signal is then guided to an optical fiber via a lens system. Luminous body, lens system,
and a connecting optical fiber are usually integrated as a light emitter module, and in order to provide a practical light emitter module, a simple optical axis adjustment method is desired.

従来の技術 従来、例えば第3図に示したような発光体モジュールの
光軸調整を行なう場合には、先ず、図示しないコリメー
トレンズを内蔵する発光体部品10と球形レンズ11と
を、互いの光軸が一致するように適当な台座上に載置固
定した後に、実際に発光体部品10を駆動して、球形レ
ンズ11による最小スポット径を与える位@(焦点)に
光ファイバ12の入射端面のコア中心がくるように、光
ファイバ12の位置決めをなしていた。
2. Description of the Related Art Conventionally, when adjusting the optical axis of a light emitter module as shown in FIG. After mounting and fixing on a suitable pedestal so that the axes match, the light emitter component 10 is actually driven to bring the incident end face of the optical fiber 12 to a position @ (focal point) that provides the minimum spot diameter by the spherical lens 11. The optical fiber 12 was positioned so that the center of the core was located.

発明が解決しようとする問題点 上記光軸調整方法は、発光体の出力する光が可視光であ
る場合には、目視により光ファイバ、を最適な位置に設
定することが可能であり、簡便な調整方法と言うことが
できる。しかし、最近において光通信に用いられる波長
帯は、石英系光ファイバの最低損失を与える1、3μm
乃至1.6μmの波長帯に移行してきており、このよう
に可視光範囲外の発光体モジュールについては、光軸調
整を目視により行なうことは不可能である。このため、
光ファイバ12の@適位置を決定するためには、光ファ
イバ12の出射端におけるフィールドパターン等の測定
が必要となり、繁雑な作業が要求されるという問題が生
じていた。
Problems to be Solved by the Invention The optical axis adjustment method described above is a simple method that allows the optical fiber to be set at the optimal position by visual inspection when the light output from the light emitter is visible light. This can be called an adjustment method. However, recently, the wavelength band used for optical communication is 1.3 μm, which provides the lowest loss of silica-based optical fiber.
The wavelength band has shifted to 1.6 μm to 1.6 μm, and it is impossible to visually adjust the optical axis of a light emitting module outside the visible light range. For this reason,
In order to determine the proper position of the optical fiber 12, it is necessary to measure the field pattern and the like at the output end of the optical fiber 12, which poses the problem of requiring complicated work.

本発明はこのような問題に鑑みて創作されたもので、発
光波長帯が可視光範囲外の発光体を用いてなる発光体モ
ジュールであっても、目視により簡単に光軸調整を行な
えるようにすることを目的としている。
The present invention was created in view of these problems, and it is possible to easily adjust the optical axis by visual inspection even if the light emitting module uses a light emitting material whose emission wavelength band is outside the visible light range. It is intended to be.

問題31、を解決するための手段 上述した従来技術の問題を解決するために、本発明は、
下記の光軸調整方法を提供する。
Means for Solving Problem 31 In order to solve the above-mentioned problems of the prior art, the present invention
The following optical axis adjustment method is provided.

光源から出力された平行光線をレンズ系により光ファイ
バに結合するようにした発光体モジュールの光軸調整を
行なうにあたり、先ず、光源とレンズ系間に曲面鏡を配
置する。次に、光源と同一ビーム径の可視光を出力する
ダミー光源からの光を前記曲面鏡で反射させる。このと
ぎ、曲面鏡とダミー光源の相対位置及び曲面鏡の曲率は
、レンズ系における前記反射光の焦点が前記光源の焦点
と一致するように設定されている。最後に、この焦点に
光ファイバ端面のコア中心がくるように、目視等により
光ファイバの位置決めを行なう。
When adjusting the optical axis of a light emitter module that couples parallel light rays output from a light source to an optical fiber using a lens system, a curved mirror is first placed between the light source and the lens system. Next, light from a dummy light source that outputs visible light having the same beam diameter as the light source is reflected by the curved mirror. At this point, the relative positions of the curved mirror and the dummy light source and the curvature of the curved mirror are set so that the focus of the reflected light in the lens system coincides with the focus of the light source. Finally, the optical fiber is positioned by visual inspection or the like so that the core center of the end face of the optical fiber is located at this focal point.

作   用 光源から出力された平行光線をレンズ系により光ファイ
バに結合するようにした発光体モジュールの光軸調整を
行なうにあたり、単に、光源とし”、  2  (2+
1r1+−’T7  ;?;i  66  e  Mコ
 稈J  I 、  7    #  m  JQ  
L  日   L/  −−ム径の可視光を出力するグ
ミ−光源からの光を、この平面鏡を介してレンズ系に入
射ざVたとしても、光源とダミー光源の出力光の波長が
異なるときには、レンズ系の色収差により、光源からの
光線の焦点とダミー光源からの光線の焦点が一致せず、
ダミー光源からの目視可能な光線を利用して、この発光
体モジュールの光軸調整を行なうことはできない。
When adjusting the optical axis of a light emitter module that couples parallel light rays output from a light source to an optical fiber using a lens system, simply use the light source as a 2 (2+
1r1+-'T7 ;? ;i 66 e M culm J I, 7 # m JQ
Even if light from a gummy light source that outputs visible light with a diameter of L/--mm is incident on the lens system through this plane mirror, if the wavelengths of the output light from the light source and the dummy light source are different, Due to the chromatic aberration of the lens system, the focus of the light ray from the light source does not match the focus of the light ray from the dummy light source,
The optical axis of this light emitting module cannot be adjusted using the visible light beam from the dummy light source.

本発明の光軸調整方法では、光源とレンズ系間に曲面鏡
を配置して、この曲面鏡を介してレンズ系に大割するダ
ミー光源からの光の焦点と光源の焦点とが一致するよう
に、曲面鏡とダミー光源の相対位置及び曲面鏡の曲率を
設定しているので、光源の出力光が可視光範囲外のもの
であったとしても、ダミー光源からの可視光により、目
視による光軸調整が可能となる。
In the optical axis adjustment method of the present invention, a curved mirror is placed between the light source and the lens system, and the focus of the light from the dummy light source, which is roughly divided into the lens system via the curved mirror, is matched with the focus of the light source. Since the relative position of the curved mirror and the dummy light source and the curvature of the curved mirror are set, even if the output light of the light source is outside the visible light range, the visible light from the dummy light source can be used to visually detect the light. Axis adjustment is possible.

実  施  例 以下、図面に示す実施例に従って、本発明をよりH体的
に説明する。
EXAMPLES Hereinafter, the present invention will be explained in more detail according to examples shown in the drawings.

第1図は、本発明の望ましい実施例を示すものであり、
光源1の発光波長λ1が、可視光を出力するダミー光源
5の発光波長λ2より長い場合についてのものである。
FIG. 1 shows a preferred embodiment of the present invention,
This is a case where the emission wavelength λ1 of the light source 1 is longer than the emission wavelength λ2 of the dummy light source 5 that outputs visible light.

光源1は平行光線A(破線)を出力し、レンズ系2はこ
の平行光線Aの光路上に配置されている。4は凸段射面
を有する曲面鏡であり、光軸調整時には、平行光線Aに
対して45°傾斜してかつ前記凸段射面がレンズ系2に
対向するように配置され、光軸調整終了後には、図中一
点鎖線で示す位置に移動可能に構成されている。ダミー
光源5は平行光線B(実線)を出力し、この平行光線B
は、曲面鏡4で反射した後に、平行光線Aと同一光軸を
有するようになっている。
A light source 1 outputs a parallel ray A (dashed line), and a lens system 2 is arranged on the optical path of this parallel ray A. Reference numeral 4 denotes a curved mirror having a convex stepped surface, and when adjusting the optical axis, it is arranged so that it is inclined at 45 degrees with respect to the parallel ray A and the convex stepped surface faces the lens system 2. After finishing, it is configured to be movable to the position shown by the dashed line in the figure. The dummy light source 5 outputs a parallel ray B (solid line), and this parallel ray B
After being reflected by the curved mirror 4, it has the same optical axis as the parallel ray A.

即ち、平行光線Aと平行光線8は互いに直交している。That is, the parallel rays A and 8 are orthogonal to each other.

曲面鏡4は必ずしも平行光線Aに対して45°傾斜させ
る必要はないが、他の傾斜角とした場合には、ダミー光
源5の出力光(平行光線B)の反射光が平行光線Aと同
一光軸を有するように、ダミー光源5の向きが変更され
る。
The curved mirror 4 does not necessarily have to be tilted at 45 degrees with respect to the parallel ray A, but if it is tilted at another angle, the reflected light of the output light (parallel ray B) of the dummy light source 5 will be the same as the parallel ray A. The direction of the dummy light source 5 is changed so that it has an optical axis.

光源1とダミー光源5は、同一ビーム径の平行光線を出
力するので、これらの光線を曲面鏡4を介さずにレンズ
系2に入射させた場合には、レンズ系2の色収差により
、ダミー光源5の焦点の方が光源1の焦点よりレンズ系
2に近い位置となり、ダミー光源5の出力光を利用して
光軸調整を行なうことはできない。この実施例では、ダ
ミー光源5の出力光を、凸段射面を有する曲面鏡4を介
してレンズ系2に入射させているので、レンズ系2の色
収差は補正され、ダミー光源5の焦点は光源1の焦点と
一致する。従って、この焦点に光フアイバ3端簡のコア
中心が位置するように、目視により光ファイバ3の位置
決めを行なうことが可能となる。光ファイバ3の位置決
めにより光軸調整を完了した後に、曲面鏡4を図中破線
で示す位置に移動することにより、光源1の出力光を光
ファイバ3に結合することのできる発光体モジュールが
完成する。
The light source 1 and the dummy light source 5 output parallel light beams with the same beam diameter, so if these light beams are incident on the lens system 2 without going through the curved mirror 4, the dummy light source The focal point of the dummy light source 5 is located closer to the lens system 2 than the focal point of the light source 1, and the optical axis cannot be adjusted using the output light of the dummy light source 5. In this embodiment, the output light of the dummy light source 5 is made incident on the lens system 2 via the curved mirror 4 having a convex stepped incident surface, so the chromatic aberration of the lens system 2 is corrected, and the focal point of the dummy light source 5 is It coincides with the focus of light source 1. Therefore, it is possible to visually position the optical fiber 3 so that the core center of the three end pieces of the optical fiber is located at this focal point. After completing the optical axis adjustment by positioning the optical fiber 3, move the curved mirror 4 to the position indicated by the broken line in the figure to complete the light emitter module that can couple the output light of the light source 1 to the optical fiber 3. do.

第2図は、光源1の発光波長λ1が、可視光を出力する
ダミー光源5の発光波長λ2より短い場合について示し
たものであり、この場合、凸段射面を有する曲面114
に代えて、凹反射面を有する曲面鏡4′を用いている。
FIG. 2 shows a case where the emission wavelength λ1 of the light source 1 is shorter than the emission wavelength λ2 of the dummy light source 5 that outputs visible light.
Instead, a curved mirror 4' having a concave reflective surface is used.

曲面鏡4′は、図中実線位置と破線位置間を移動可能に
構成される。この実施例では、曲面1i4’ なしに光
源1及びダミー光源5の出力光をレンズ系2に入射させ
た場合の色収差(ダミー光源5の焦点が光源1の焦点よ
りレンズ系2に遠い位置となる)が曲面114′により
補正され、光源1の焦点とダミー光源5の焦点が一致す
るようになる。
The curved mirror 4' is configured to be movable between the solid line position and the broken line position in the figure. In this example, chromatic aberration occurs when the output lights of the light source 1 and the dummy light source 5 are made incident on the lens system 2 without the curved surface 1i4' (the focal point of the dummy light source 5 is located further away from the lens system 2 than the focal point of the light source 1). ) is corrected by the curved surface 114', so that the focus of the light source 1 and the focus of the dummy light source 5 match.

尚、曲面鏡4,4′の曲率はζダミー光源5の焦点が光
源1の焦点と一致するように、レンズ系2の色収差特性
及び光源1並びにダミー光源5の出力波長に応じて予め
設定しておくことが可能である。
The curvatures of the curved mirrors 4 and 4' are set in advance according to the chromatic aberration characteristics of the lens system 2 and the output wavelengths of the light source 1 and the dummy light source 5 so that the focus of the ζ dummy light source 5 coincides with the focus of the light source 1. It is possible to keep it.

発明の効果 以上詳述したように、本発明によれば、可視光を出力す
るダミー光源の焦点が光源の焦点と一致すように、光源
及びダミー光源の出力波長に応じた曲率の曲面鏡を、ダ
ミー光源の出力光の光路上に配置して、光ファイバの位
置決めを行なうようにしたので、光源の出力光が可視光
範囲外のものであったとしても、目視による発光体モジ
ュールの光軸調整が可能になるという効果を奏する。
Effects of the Invention As detailed above, according to the present invention, a curved mirror having a curvature according to the output wavelength of the light source and the dummy light source is provided so that the focus of the dummy light source that outputs visible light matches the focus of the light source. Since the optical fiber is positioned on the optical path of the output light of the dummy light source, even if the output light of the light source is outside the visible light range, the optical axis of the light emitter module can be determined by visual inspection. This has the effect of making adjustment possible.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明方法の望ましい実施例を示す図(λ2
〈λ1の場合)、 第2図は、本発明方法の望ましい実施例を示す図(λ 
〈λ2の場合)、 第3図は、一般的な発光体モジュールの概略構成図であ
る。 1・・・光源、     2.11・・・レンズ系、3
.12・・・光ファイバ、 4.4′・・・曲面鏡、  5・・・ダミー光源。 1゛光譚 2° レンズ系 3、 尤」ファイノV 4 曲15ヶ乞 5 デミー范堺 本宛明大プ乞イ列のさ括明図(χ2くλ言のどき)41
、m面妓 5: 夕゛(−七)色 本名5明スZか邑イ列/)さン【月回 (入1くλ2Q
とき)第2図
FIG. 1 is a diagram showing a preferred embodiment of the method of the present invention (λ2
(for λ1), FIG. 2 is a diagram showing a preferred embodiment of the method of the present invention (for λ
(In the case of λ2), FIG. 3 is a schematic configuration diagram of a general light emitting module. 1...Light source, 2.11...Lens system, 3
.. 12... Optical fiber, 4.4'... Curved mirror, 5... Dummy light source. 1゛Kotan 2° Lens system 3, 尤 Phyno V 4 Song 15 songs 5 Demy fan Sakaimoto Meiji series summary diagram (χ2 λ words) 41
, m-face prostitute 5: Yu゛ (-7) Color real name 5 Mingsu Z or Ou I row/) [Monthly (Enter 1ku λ2Q)
time) Figure 2

Claims (1)

【特許請求の範囲】 光源(1)から出力された平行光線をレンズ系(2)に
より光ファイバ(3)に結合するようにした発光体モジ
ュールの光軸調整方法において、光源(1)とレンズ系
(2)間に曲面鏡(4)を配置し、 光源(1)と同一ビーム径の可視光を出力するダミー光
源(5)からの光を前記曲面鏡(4)で反射させ、 レンズ系(2)における前記反射光の焦点が光源(1)
の焦点と一致すべく、曲面鏡(4)とダミー光源(5)
の相対位置及び曲面鏡(4)の曲率を設定し、この焦点
に光ファイバ(3)端面のコア中心を配置するようにし
たことを特徴とする発光体モジュールの光軸調整方法。
[Claims] A method for adjusting the optical axis of a light emitter module in which parallel light beams output from a light source (1) are coupled to an optical fiber (3) by a lens system (2), wherein the light source (1) and the lens A curved mirror (4) is arranged between the system (2), and the light from the dummy light source (5) that outputs visible light with the same beam diameter as the light source (1) is reflected by the curved mirror (4), and the lens system The focus of the reflected light in (2) is the light source (1)
A curved mirror (4) and a dummy light source (5) are used to match the focal point of the
1. A method for adjusting an optical axis of a light emitting module, characterized in that the relative position of the curved mirror (4) and the curvature of the curved mirror (4) are set, and the center of the core of the end face of the optical fiber (3) is placed at the focal point.
JP28805586A 1986-12-02 1986-12-02 Optical axis adjusting method for luminous body module Pending JPS63139307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28805586A JPS63139307A (en) 1986-12-02 1986-12-02 Optical axis adjusting method for luminous body module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28805586A JPS63139307A (en) 1986-12-02 1986-12-02 Optical axis adjusting method for luminous body module

Publications (1)

Publication Number Publication Date
JPS63139307A true JPS63139307A (en) 1988-06-11

Family

ID=17725254

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28805586A Pending JPS63139307A (en) 1986-12-02 1986-12-02 Optical axis adjusting method for luminous body module

Country Status (1)

Country Link
JP (1) JPS63139307A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5916458A (en) * 1995-08-31 1999-06-29 Fujitsu Limited Production of optical module assembly
WO2013035227A1 (en) * 2011-09-09 2013-03-14 日本電気株式会社 Light receiving module
EP2579060A1 (en) * 2011-10-03 2013-04-10 Japan Aerospace Exploration Agency Laser light reflection method and device for aircraft-installed laser apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5916458A (en) * 1995-08-31 1999-06-29 Fujitsu Limited Production of optical module assembly
WO2013035227A1 (en) * 2011-09-09 2013-03-14 日本電気株式会社 Light receiving module
CN103858039A (en) * 2011-09-09 2014-06-11 日本电气株式会社 Light receiving module
JPWO2013035227A1 (en) * 2011-09-09 2015-03-23 日本電気株式会社 Receiver module
CN103858039B (en) * 2011-09-09 2015-11-25 日本电气株式会社 Optical Receivers
US9383528B2 (en) 2011-09-09 2016-07-05 Nec Corporation Light-receiving module
EP2579060A1 (en) * 2011-10-03 2013-04-10 Japan Aerospace Exploration Agency Laser light reflection method and device for aircraft-installed laser apparatus
JP2013078978A (en) * 2011-10-03 2013-05-02 Japan Aerospace Exploration Agency Laser light reflection method and device for aircraft-installed laser device

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