JPH10293233A - Optical fiber light guide unit - Google Patents

Optical fiber light guide unit

Info

Publication number
JPH10293233A
JPH10293233A JP9103446A JP10344697A JPH10293233A JP H10293233 A JPH10293233 A JP H10293233A JP 9103446 A JP9103446 A JP 9103446A JP 10344697 A JP10344697 A JP 10344697A JP H10293233 A JPH10293233 A JP H10293233A
Authority
JP
Japan
Prior art keywords
optical fiber
oscillation
semiconductor laser
quasi
semiconductor lasers
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Withdrawn
Application number
JP9103446A
Other languages
Japanese (ja)
Inventor
Satoru Yamaguchi
哲 山口
Katsuhiro Minamida
勝宏 南田
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP9103446A priority Critical patent/JPH10293233A/en
Publication of JPH10293233A publication Critical patent/JPH10293233A/en
Withdrawn legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide an optical system which can guide projection lights from false successive oscillation semiconductor lasers to one optical fiber. SOLUTION: A rotary mirror 2 which slants in the direction wherein the projection lights from the false successive oscillation semiconductor lasers 1 arrayed on the same circumference are guided to the end surface of an optical fiber 4 is rotated and directed to the respective semiconductor lasers in synchronism with the oscillation of the respective semiconductor lasers made to oscillate so that false successive oscillation pulses are shifted respectively. Consequently, the oscillation lights of all the semiconductor lasers which are arrayed can be guided to the optical fiber 4.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、複数の擬似連続発
振をする半導体レーザ光を光ファイバーに導光するため
の光学系に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical system for guiding a plurality of quasi-continuously oscillating semiconductor laser beams to an optical fiber.

【0002】[0002]

【従来の技術】半導体レーザからの出射光を光ファイバ
ーに導光する方法として、単純にレンズを用いて1個の
半導体レーザ光を導光したり、偏光ビームスプリッター
を用いた偏光カップリングにより2個の半導体レーザ光
を重ね合わせて導光する方法があった。
2. Description of the Related Art As a method of guiding light emitted from a semiconductor laser to an optical fiber, one semiconductor laser light is simply guided using a lens, or two light beams are guided by a polarization coupling using a polarization beam splitter. There is a method of superposing the semiconductor laser beams and guiding the light.

【0003】一方、半導体レーザは発光領域が微小であ
るが故に、発振光として取り出せる光出力には限りがあ
る。このため、高出力化のために、発光領域を与える活
性層ストライプを空間的に多数配列するなどの措置が取
られている。また、微小領域からの発熱も高出力化を妨
げる要因となる。そこで、発振と放熱とを交互に繰り返
し、放熱時には発振を休んで、ピークパワーの高い矩形
状のパルス発振を行う擬似連続発振(Quasi-CW)半導体
レーザが開発された。例えば、ピークパワー65W、パ
ルス幅1ms、発振時間の割合を与えるデューティーフ
ァクター20%で発振する擬似連続発振半導体レーザ等
がある。
On the other hand, since a semiconductor laser has a very small light emitting area, the light output that can be extracted as oscillation light is limited. For this reason, measures such as spatially arranging a large number of active layer stripes for providing a light emitting region have been taken to increase the output. Further, heat generation from the minute region also becomes a factor that hinders an increase in output. Therefore, a quasi-continuous wave (Quasi-CW) semiconductor laser has been developed which alternately repeats oscillation and heat dissipation, pauses oscillation during heat dissipation, and performs rectangular pulse oscillation with high peak power. For example, there is a quasi-continuous oscillation semiconductor laser that oscillates at a peak power of 65 W, a pulse width of 1 ms, and a duty factor of 20% that gives a ratio of oscillation time.

【0004】[0004]

【発明が解決しようとする課題】ところで、上記した半
導体レーザーを3個以上発振させて、それらからの出射
光を1本の光ファイバーに導光できると良いが、従来の
偏光ビームスプリッターを用いた偏光カップリングでは
困難であった。
By the way, it is desirable to oscillate three or more of the above-mentioned semiconductor lasers and to guide the light emitted therefrom to one optical fiber. However, it is preferable to use a conventional polarization beam splitter. The coupling was difficult.

【0005】本発明は、かかる状況に鑑みてなされたも
のであり、複数の擬似連続発振半導体レーザからの出射
光を、1本のファイバーに導光することが可能な光学系
を提供することを目的とする。
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an optical system capable of guiding outgoing light from a plurality of pseudo continuous wave semiconductor lasers to one fiber. Aim.

【0006】[0006]

【課題を解決するための手段】上記の目的を達成するた
めに本発明は、まず、複数の擬似連続発振をする半導体
レーザ光をファイバーに導光する光学系に於て、同一円
周上でレーザ光出射方向を円の中心向きに配列した複数
の擬似連続発振半導体レーザと、前記半導体レーザの各
出射光を所望の方向に反射する回転鏡と、前記回転鏡か
らの反射光を前記光ファイバーに導光する光学系を有
し、前記回転鏡を、擬似連続発振パルスの位相をそれぞ
れずらして発振させた前記各半導体レーザの発振に同期
して前記各半導体レーザの方向に回転させ配向させるこ
とを特徴とする光ファイバー導光器を提供する。
According to the present invention, there is provided an optical system for guiding a plurality of quasi-continuously oscillating semiconductor laser beams to a fiber on the same circumference. A plurality of quasi-continuous oscillation semiconductor lasers whose laser light emission directions are arranged in the direction of the center of the circle; a rotating mirror that reflects each emitted light of the semiconductor laser in a desired direction; and a light reflected from the rotating mirror to the optical fiber. Having an optical system for guiding light, and rotating and orienting the rotating mirror in the direction of each of the semiconductor lasers in synchronization with the oscillation of each of the semiconductor lasers oscillated by shifting the phase of the pseudo continuous oscillation pulse. An optical fiber light guide is provided.

【0007】[0007]

【発明の実施の形態】以下、添付の図面を参照して本発
明を詳細に説明する。図1に本発明の光学系の要部構成
を示す。回転鏡2が回転軸Oを中心に回転可能に支持さ
れている。また、回転軸Oを中心とする同一円周上には
複数の擬似連続発振をする半導体レーザ1、11、1
2、13、14、15が円の中心に向けてレーザ光を出
射するように配列されている。回転鏡2は各半導体レー
ザ1、11、12、13、14、15と対向したときに
その出射光を下方の光ファイバー4の端面に向けて反射
する角度に傾斜している。尚、回転鏡2と光ファイバー
4との間には回転鏡2にて反射した光を光ファイバー4
の端面に収束させるためのレンズ3が介在している。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a main configuration of an optical system according to the present invention. The rotating mirror 2 is supported so as to be rotatable about a rotation axis O. A plurality of quasi-continuously oscillating semiconductor lasers 1, 11, 1 are arranged on the same circumference around the rotation axis O.
2, 13, 14, and 15 are arranged so as to emit laser light toward the center of the circle. The rotating mirror 2 is inclined at an angle to reflect the emitted light toward the end face of the optical fiber 4 below when the rotating mirror 2 faces each of the semiconductor lasers 1, 11, 12, 13, 14, and 15. The light reflected by the rotating mirror 2 is provided between the rotating mirror 2 and the optical fiber 4.
A lens 3 for converging on the end face of the lens is interposed.

【0008】例えば、ピーク出力65Wの擬似連続発振
半導体レーザ1から出力された光は回転鏡2で反射され
レンズ3を通して光ファイバー4に導光される。
For example, light output from the quasi-continuous oscillation semiconductor laser 1 having a peak output of 65 W is reflected by the rotating mirror 2 and guided to the optical fiber 4 through the lens 3.

【0009】擬似連続発振半導体レーザ1の発振が終了
すると、次の擬似連続発振半導体レーザ11が発振を開
始し、それと同時に回転鏡2が回転し、この擬似連続振
半導体レーザ11からの出射光を反射して光ファイバー
4に導光する。
When the oscillation of the quasi-continuous oscillation semiconductor laser 1 ends, the next quasi-continuous oscillation semiconductor laser 11 starts oscillating, and at the same time, the rotating mirror 2 rotates, and the light emitted from the quasi-continuous oscillation semiconductor laser 11 is emitted. The light is reflected and guided to the optical fiber 4.

【0010】同様にして順次、擬似連続発振半導体レー
ザ12、13、14、15からの出射光を回転鏡2にて
反射して光ファイバー4に導光する。そして、また擬似
連続発振半導体レーザ1、11、12、13、14、1
5、1、11・・・の擬似連続発振を繰り返すと、連続
して光ファイバー4に出射光を導光することができる。
図2に各擬似連続発振半導体レーザ1、11、12、1
3、14、15の発振タイミング5、51、52、5
3、54、55を示す。
Similarly, the light emitted from the quasi-continuous wave semiconductor lasers 12, 13, 14, and 15 is sequentially reflected by the rotating mirror 2 and guided to the optical fiber 4. Further, the pseudo continuous wave semiconductor lasers 1, 11, 12, 13, 14, 1
By repeating the quasi-continuous oscillation of 5, 1, 11,..., The emitted light can be continuously guided to the optical fiber 4.
FIG. 2 shows each of the quasi-continuous wave semiconductor lasers 1, 11, 12, and 1.
3, 14, 15 oscillation timings 5, 51, 52, 5
3, 54 and 55 are shown.

【0011】[0011]

【発明の効果】かかる構成の集光光学系は、複数の擬似
連続発振半導体レーザから半導体レーザ出射光を順番に
光ファイバーに導光し、ファイバー出射端から連続した
レーザ出力を得ることができる。
According to the condensing optical system having such a configuration, the semiconductor laser outgoing light from the plurality of pseudo continuous oscillation semiconductor lasers is guided to the optical fiber in order, and a continuous laser output can be obtained from the fiber outgoing end.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明が適用された光学系の要部構成を示す模
式的斜視図。
FIG. 1 is a schematic perspective view showing a main configuration of an optical system to which the present invention is applied.

【図2】複数の擬似連続発振半導体レーザの発振のタイ
ミングを表す図。
FIG. 2 is a diagram illustrating timings of oscillation of a plurality of pseudo continuous wave semiconductor lasers.

【符号の説明】[Explanation of symbols]

1 擬似連続発振半導体レーザ 11 擬似連続発振半導体レーザ 12 擬似連続発振半導体レーザ 13 擬似連続発振半導体レーザ 14 擬似連続発振半導体レーザ 15 擬似連続発振半導体レーザ 2 回転鏡 3 レンズ 4 光ファイバー 5 擬似連続発振半導体レーザ1の発振のタイミング 51 擬似連続発振半導体レーザ11の発振のタイミン
グ 52 擬似連続発振半導体レーザ12の発振のタイミン
グ 53 擬似連続発振半導体レーザ13の発振のタイミン
グ 54 擬似連続発振半導体レーザ14の発振のタイミン
グ 55 擬似連続発振半導体レーザ15の発振のタイミン
グ O 回転軸
Reference Signs List 1 quasi-continuous oscillation semiconductor laser 11 quasi-continuous oscillation semiconductor laser 12 quasi-continuous oscillation semiconductor laser 13 quasi-continuous oscillation semiconductor laser 14 quasi-continuous oscillation semiconductor laser 15 quasi-continuous oscillation semiconductor laser 2 rotating mirror 3 lens 4 optical fiber 5 quasi-continuous oscillation semiconductor laser 1 51 Oscillation timing of the pseudo continuous oscillation semiconductor laser 11 52 Oscillation timing of the pseudo continuous oscillation semiconductor laser 12 53 Oscillation timing of the pseudo continuous oscillation semiconductor laser 13 54 Oscillation timing of the pseudo continuous oscillation semiconductor laser 14 55 Pseudo Oscillation timing of continuous oscillation semiconductor laser 15

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 複数の擬似連続発振をする半導体レー
ザ光を光ファイバーに導光する光学系に於て、 同一円周上でレーザ光の出射方向を円の中心向きに配列
した複数の擬似連続発振半導体レーザと、 前記半導体レーザの各出射光を所望の方向に反射するべ
く傾斜する回転鏡と、 前記回転鏡からの反射光を前記光ファイバーに導光する
光学系とを有し、 前記回転鏡を、擬似連続発振パルスの位相をそれぞれず
らして発振させた前記各半導体レーザの発振に同期して
前記各半導体レーザの方向に回転させて配向させること
を特徴とする光ファイバー導光器。
In an optical system for guiding a plurality of semiconductor laser beams that perform quasi-continuous oscillation to an optical fiber, a plurality of quasi-continuous oscillations in which the emission directions of the laser beams are arranged on the same circumference toward the center of the circle. A semiconductor laser; a rotating mirror inclined to reflect each emitted light of the semiconductor laser in a desired direction; and an optical system for guiding the reflected light from the rotating mirror to the optical fiber. An optical fiber light guide for rotating and orienting in the direction of each of the semiconductor lasers in synchronization with the oscillation of each of the semiconductor lasers oscillated by shifting the phase of the pseudo continuous oscillation pulse.
JP9103446A 1997-04-21 1997-04-21 Optical fiber light guide unit Withdrawn JPH10293233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9103446A JPH10293233A (en) 1997-04-21 1997-04-21 Optical fiber light guide unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9103446A JPH10293233A (en) 1997-04-21 1997-04-21 Optical fiber light guide unit

Publications (1)

Publication Number Publication Date
JPH10293233A true JPH10293233A (en) 1998-11-04

Family

ID=14354264

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9103446A Withdrawn JPH10293233A (en) 1997-04-21 1997-04-21 Optical fiber light guide unit

Country Status (1)

Country Link
JP (1) JPH10293233A (en)

Cited By (10)

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WO2003100315A1 (en) 2002-05-24 2003-12-04 Olympus Corporation Illuminating device, and photographing device and projector device using this illuminating device
JP2005181579A (en) * 2003-12-18 2005-07-07 Olympus Corp Lighting device and display device using the same
JP2005531135A (en) * 2002-05-22 2005-10-13 カビタル オイ Method and laser apparatus for generating high optical power density
US6991336B2 (en) 2002-08-07 2006-01-31 Olympus Corporation Illumination apparatus and projector display apparatus
EP1602962A3 (en) * 2002-10-21 2006-07-05 Olympus Corporation Illumination apparatus and image projection apparatus
US7252392B2 (en) 2003-12-16 2007-08-07 Olympus Corporation Illumination apparatus and image projection apparatus using the illumination apparatus
WO2008146561A1 (en) * 2007-05-30 2008-12-04 Olympus Corporation Illuminating device and image projecting display device
JP2009028773A (en) * 2007-07-30 2009-02-12 Sunx Ltd Laser beam machining apparatus
WO2009154028A1 (en) * 2008-06-17 2009-12-23 オリンパス株式会社 Light source device and endoscopic device

Cited By (22)

* Cited by examiner, † Cited by third party
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JP2005531135A (en) * 2002-05-22 2005-10-13 カビタル オイ Method and laser apparatus for generating high optical power density
US7817693B2 (en) 2002-05-22 2010-10-19 Cavitar Oy Method and a laser device for producing high optical power density
US7128423B2 (en) 2002-05-24 2006-10-31 Olympus Corporation Illumination apparatus, and image capturing apparatus and projector apparatus using this illumination apparatus
US7322705B2 (en) 2002-05-24 2008-01-29 Olympus Corporation Illumination apparatus, and image capturing apparatus and projector apparatus using this illumination apparatus
WO2003100315A1 (en) 2002-05-24 2003-12-04 Olympus Corporation Illuminating device, and photographing device and projector device using this illuminating device
EP1508740A1 (en) * 2002-05-24 2005-02-23 Olympus Corporation Illuminating device, and photographing device and projector device using this illuminating device
US6899435B2 (en) 2002-05-24 2005-05-31 Olympus Corporation Illumination apparatus and image projection apparatus using the illumination apparatus
US7083288B2 (en) 2002-05-24 2006-08-01 Olympus Corporation Illumination apparatus and image projection apparatus using the illumination apparatus
JP2003344948A (en) * 2002-05-24 2003-12-03 Olympus Optical Co Ltd Illumination device and image projecting device
EP1508740A4 (en) * 2002-05-24 2008-09-03 Olympus Corp Illuminating device, and photographing device and projector device using this illuminating device
US6991336B2 (en) 2002-08-07 2006-01-31 Olympus Corporation Illumination apparatus and projector display apparatus
US7080909B2 (en) 2002-08-07 2006-07-25 Olympus Corporation Illumination apparatus and projector display apparatus
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WO2008146561A1 (en) * 2007-05-30 2008-12-04 Olympus Corporation Illuminating device and image projecting display device
JP2009028773A (en) * 2007-07-30 2009-02-12 Sunx Ltd Laser beam machining apparatus
WO2009154028A1 (en) * 2008-06-17 2009-12-23 オリンパス株式会社 Light source device and endoscopic device

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Effective date: 20040706