JPH0297081A - Semiconductor array laser - Google Patents

Semiconductor array laser

Info

Publication number
JPH0297081A
JPH0297081A JP63249361A JP24936188A JPH0297081A JP H0297081 A JPH0297081 A JP H0297081A JP 63249361 A JP63249361 A JP 63249361A JP 24936188 A JP24936188 A JP 24936188A JP H0297081 A JPH0297081 A JP H0297081A
Authority
JP
Japan
Prior art keywords
laser
isolator
chips
beams
semiconductor array
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
JP63249361A
Other languages
Japanese (ja)
Inventor
Mitsuo Ishii
光男 石井
Akira Hattori
亮 服部
Hitoshi Kagawa
仁志 香川
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP63249361A priority Critical patent/JPH0297081A/en
Publication of JPH0297081A publication Critical patent/JPH0297081A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S5/00Semiconductor lasers
    • H01S5/02Structural details or components not essential to laser action
    • H01S5/022Mountings; Housings
    • H01S5/023Mount members, e.g. sub-mount members
    • H01S5/02325Mechanically integrated components on mount members or optical micro-benches
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S5/00Semiconductor lasers
    • H01S5/005Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
    • H01S5/0071Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping for beam steering, e.g. using a mirror outside the cavity to change the beam direction
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S5/00Semiconductor lasers
    • H01S5/06Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068Stabilisation of laser output parameters
    • H01S5/0683Stabilisation of laser output parameters by monitoring the optical output parameters
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S5/00Semiconductor lasers
    • H01S5/40Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4025Array arrangements, e.g. constituted by discrete laser diodes or laser bar
    • H01S5/4031Edge-emitting structures

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)

Abstract

PURPOSE:To enable the drive and the control of laser chips independently of each other by a method wherein two or more beams, very close to each other, of the rear laser beams emitted from laser chips of a semiconductor chip array are isolated through an isolator to be monitored by different photodetectors respectively. CONSTITUTION:A semiconductor laser array of this design is composed of the following: a semiconductor chip array 1, which is composed of laser chips 4 and 5 electrically isolated from each other, mounted on a submount 2 or a block 3; an isolator 7 isolating the rear laser beams 10 and 11 from each other and diverting their traveling directions; and photodetectors which monitor the beams of rear laser beams isolated by the isolator 7 respectively. The, two beams, separated from each other by a very small space of the rear laser rays are isolated by an isolator to be incident on two photodiodes 12 respectively. Therefore, even if laser chips are driven at the same time, the rear laser rays can be monitored without the optical interference between them, so that LD chips call be driven at the same time independently of each other.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、複数個のレーザチップを有する半導体アレ
イレーザに関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a semiconductor array laser having a plurality of laser chips.

〔従来の技術〕[Conventional technology]

光デイスクメモリの情報の瞬時の書き込み/読み取りゃ
、レーザビームプリンタの高速化を目的として、その光
源となる半導体アレイレーザの開発が各社において行わ
れている。
With the aim of speeding up laser beam printers for instantaneous writing/reading of information on optical disk memories, various companies are developing semiconductor array lasers to serve as light sources.

第2図は従来の半導体アレイレーザを示す断面図であ、
る。この図において、1はLDアレイチップ、2はサブ
マウント、3はブロック(ヒートシンク)、4.5はL
Dチップで、分離溝6により電気的に分離形成されてい
る。8.9は前記LDチップ4,5より放射された前面
レーザ光、10.11は前記LDチップ4.5より放射
された裏面レーザ光、12は内蔵されたモニタ用のフォ
トダイオード、13はパッケージである。
FIG. 2 is a cross-sectional view showing a conventional semiconductor array laser.
Ru. In this figure, 1 is the LD array chip, 2 is the submount, 3 is the block (heat sink), and 4.5 is the L
The D chip is electrically isolated by a separation groove 6. 8.9 is the front laser beam emitted from the LD chips 4 and 5, 10.11 is the back laser beam emitted from the LD chip 4.5, 12 is a built-in photodiode for monitoring, and 13 is a package. It is.

そして、LDアレイチップ1はサブマウント2を介して
、ブロック3上に載置されており、ブロック3はパッケ
ージ13の主面に対して、第2図に示したようにマウン
トされている。また、図示してないが、LDアレイチッ
プ1は金ワイヤを介してパッケージ13とは電気的に絶
縁されたポストと電気的に接続される。
The LD array chip 1 is mounted on a block 3 via a submount 2, and the block 3 is mounted on the main surface of the package 13 as shown in FIG. Although not shown, the LD array chip 1 is electrically connected to posts electrically insulated from the package 13 via gold wires.

LDチップ4.5を駆動する場合は、個々のLDチップ
が金ワイヤで接続されたポストと、パッケージ13と電
気的に接続されたポストとの間に順次方向バイアスを印
加することにより、レーザ発振が開始され、前面レーザ
光8.9、裏面レーザ光10.11が放射される。そし
て、裏面レーザ光10.11をフォトダイオード12に
よってモニタすることによって、前面レーザ光8.9の
出力の安定化を図フでいた。
When driving the LD chip 4.5, laser oscillation is achieved by sequentially applying a directional bias between the post to which each LD chip is connected with a gold wire and the post electrically connected to the package 13. is started, and a front laser beam 8.9 and a back laser beam 10.11 are emitted. By monitoring the back laser beam 10.11 with the photodiode 12, it was possible to stabilize the output of the front laser beam 8.9.

ところで、一般には、2点発光の場合、発光点間隔を1
00μm程度に設定する場合が多く、この場合、2発光
点から前面レーザ光8.9を共通の光学系で集光して、
活用することが可能である。また、光デイスクメモリや
レーザビームプリンタ等への応用においては、同時に、
2本以上のレーザビームをそれぞれ独立に動作させて活
用され、高速化という点で半導体アレイレーザは非常に
有望である。
By the way, in general, in the case of two-point light emission, the distance between the light-emitting points is set to 1.
In many cases, it is set to about 00 μm, and in this case, the front laser beam 8.9 from the two light emitting points is focused by a common optical system,
It is possible to utilize it. In addition, in applications such as optical disk memory and laser beam printers, at the same time,
Semiconductor array lasers are very promising in terms of speed-up and are utilized by operating two or more laser beams independently.

しかし、従来は第2図に示したよう、LDチップ4,5
の発光点間隔が狭いため、フォトダイオード12を1個
のみパッケージ13に接続しており、LDチップ4.5
の裏面レーザ光10.11を個別にモニタするか、同時
にモニタするしかなかった。
However, in the past, as shown in FIG.
Since the distance between the light emitting points is narrow, only one photodiode 12 is connected to the package 13, and the LD chip 4.5
There was no choice but to monitor the backside laser beams 10 and 11 individually or simultaneously.

(発明が解決しようとする課題) 上記のような従来の半導体アレイレーザは、高速化に対
応して、2個のLDチップ4,5を同時に発光させた場
合、2個のLDチップ4.5の裏面レーザ光10,11
の光学的干渉は避けられず、所望の特性を得ることが非
常に困難であった。このため、システム応用上、同時に
2個のLDチップ4,5を独立して駆動することができ
ない、すなわち、高速化できないという問題があった。
(Problems to be Solved by the Invention) The conventional semiconductor array laser as described above corresponds to higher speeds, and when the two LD chips 4 and 5 emit light at the same time, the two LD chips 4.5 backside laser beams 10, 11
optical interference is unavoidable, making it extremely difficult to obtain desired characteristics. Therefore, in terms of system application, there was a problem that the two LD chips 4 and 5 could not be driven independently at the same time, that is, the speed could not be increased.

この発明は、上記のような問題点を解消するためになさ
れたもので、複数個のLDチップの裏面レーザ光の光学
的干渉を避けることができ、同時に複数個のLDチップ
を独立してモニタ可能な半導体アレイレーザを得ること
を目的とする。
This invention was made to solve the above-mentioned problems, and it is possible to avoid optical interference of the backside laser beams of multiple LD chips, and to simultaneously monitor multiple LD chips independently. The purpose is to obtain a semiconductor array laser that is possible.

(課題を解決するための手段〕 この発明に係る半導体アレイレーザは、サブマウントま
たはヒートシンク上に載置され、電気的に分離された複
数個のレーザチップからなる半導体アレイチップと、前
記サブマウントまたはヒートシンク上に形成され、前記
半導体アレイチップから出射される複数本の裏面レーザ
光を分離して進行方向を変化させるアイソレータと、こ
のアイソレータにより分離された前記複数本の裏面レー
ザ光をそれぞれモニタする複数個の受光器とから構成し
たものである。
(Means for Solving the Problems) A semiconductor array laser according to the present invention includes a semiconductor array chip including a plurality of electrically isolated laser chips placed on a submount or a heat sink; an isolator that is formed on the heat sink and separates the plurality of backside laser beams emitted from the semiconductor array chip and changes the traveling direction; and a plurality of isolators that respectively monitor the plurality of backside laser beams separated by the isolator. It consists of two photoreceivers.

〔作用〕[Effect]

この発明においては、半導体アレイチップの個々のレー
ザチップから微小間隔で近接して出射される複数本の裏
面レーザ光がアイソレータによって分離され、それぞれ
が異なる受光器によりモニタされることにより、個々の
レーザチップの駆動、制御が可能になる。
In this invention, a plurality of backside laser beams emitted closely at minute intervals from individual laser chips of a semiconductor array chip are separated by an isolator, and each is monitored by a different receiver, so that each laser beam is It becomes possible to drive and control the chip.

〔実施例) 以下、この発明の一実施例を図について説明する。〔Example) An embodiment of the present invention will be described below with reference to the drawings.

第1図はこの発明の半導体アレイレーザ(2ビームアレ
イレーザ)の一実施例を示す断面図である。
FIG. 1 is a sectional view showing an embodiment of a semiconductor array laser (two-beam array laser) of the present invention.

この図において、第2図と同一符号は同一のものを示す
。7はアイソレータで、LDチップ4゜5の共振器面後
方より放射された裏面レーザ光10.11を左右に分離
して2個のフォトダイオド12に入射させる。
In this figure, the same reference numerals as in FIG. 2 indicate the same parts. Reference numeral 7 denotes an isolator which separates backside laser beams 10 and 11 emitted from the rear of the resonator surface of the LD chip 4.degree.

すなわち、この発明の半導体アレイレーザは、アイソレ
ータ7によって微小間隔で近接した2木の裏面レーザ光
10.11を分離して、それぞれ2個のフォトダイオー
ド12に入射させる構成としたので、LDチップ4.5
を同時に駆動しても裏面レーザ光10.11の光学的干
渉を生じることなくモニタすることができ、LDチップ
4,5を同時に独立して駆動することが可能になってい
る。
That is, the semiconductor array laser of the present invention has a configuration in which the isolator 7 separates two pieces of backside laser beams 10 and 11 that are close to each other at a minute interval and makes them respectively enter two photodiodes 12. .5
Even if the LD chips 4 and 5 are driven simultaneously, monitoring can be performed without optical interference of the backside laser beams 10 and 11, and it is possible to drive the LD chips 4 and 5 simultaneously and independently.

なお、サブマウント2の材料が、例えばシリコンの場合
には、エツチングでの加工が容易なことから、第1図に
示したように三角形状に、高さがLDアレイチップ1の
厚み程度になるようにエツチップ加工して、モノリシッ
クにアイソレータ7を形成することが考えられる。
If the material of the submount 2 is silicon, for example, it is easy to process by etching, so as shown in FIG. It is conceivable to form the isolator 7 monolithically by performing etching processing as described above.

また、機械加工が容易なことから、シリコンを三角形状
に加工したものを、LDアレイチップ1と同様に、サブ
マウント2上に接近させてマウントすることも可能であ
るほか、金属によりアイソレータ7を形成してもよい。
Furthermore, since machining is easy, it is also possible to mount silicon processed into a triangular shape close to the submount 2 in the same way as the LD array chip 1. may be formed.

また、反射ではなく、屈折によって光線を分離するアイ
ソレータを用いることも可能である。
It is also possible to use an isolator that separates light beams by refraction rather than reflection.

なお、上記実施例では、2ビームアレイレーザを示した
が、3個以上のLDチップを備えたアレイレーザについ
ても同様であることはいうまでもない。
In the above embodiment, a two-beam array laser is shown, but it goes without saying that the same applies to an array laser equipped with three or more LD chips.

〔発明の効果〕〔Effect of the invention〕

この発明は以上説明したとおり、サブマウントまたはヒ
ートシンク上に載置され、電気的に分離された複数個の
レーザチップからなる半導体アレイチップと、前記サブ
マウントまたはヒートシンク上に形成され、前記半導体
アレイチップから出射される複数本の裏面レーザ光を分
離して進行方向を変化させるアイソレータと、このアイ
ソレータにより分離された前記複数本の裏面レーザ光を
それぞれモニタする複数個の受光器とから構成したので
、半導体アレイチップの個々のレーザチップから微小間
隔で近接して出射される複数本の裏面レーザ光がアイソ
レータによって分離され、それぞれが異なる受光器によ
りモニタされ、個々のレーザチップを同時に独立して駆
動、制御することが可能となる。したがって、これによ
り、光デイスクメモリの情報の書き込み/読み取りを瞬
時に行うことが可能になるほか、レーザビームプリンタ
等の高速化が可能になるというような効果がある。
As described above, the present invention includes a semiconductor array chip that is placed on a submount or a heat sink and is made up of a plurality of electrically isolated laser chips; Since it is composed of an isolator that separates a plurality of back laser beams emitted from the laser beam and changes the traveling direction, and a plurality of light receivers that respectively monitor the plurality of back laser beams separated by this isolator, Multiple backside laser beams are emitted close to each other at minute intervals from the individual laser chips of the semiconductor array chip, are separated by an isolator, each is monitored by a different receiver, and the individual laser chips are driven simultaneously and independently. It becomes possible to control. Therefore, this has the effect of not only making it possible to write/read information on the optical disk memory instantaneously, but also making it possible to speed up laser beam printers and the like.

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

第1図はこの発明の半導体アレイレーザの一実施例を示
す断面図、第2図は従来の半導体アレイレーザを示す断
面図である。 図において、1はLDアレイチップ、2はサブマウント
、3はブロック、4.5はLDチップ、6は分離溝、7
はアイソレータ、8.9は前面レーザ光、10.11は
裏面レーザ光、12はフォトダイオード、13はパッケ
ージである。 なお、各図中の同一符号は同一または相当部分を示す。
FIG. 1 is a sectional view showing an embodiment of the semiconductor array laser of the present invention, and FIG. 2 is a sectional view showing a conventional semiconductor array laser. In the figure, 1 is an LD array chip, 2 is a submount, 3 is a block, 4.5 is an LD chip, 6 is a separation groove, and 7
is an isolator, 8.9 is a front laser beam, 10.11 is a back laser beam, 12 is a photodiode, and 13 is a package. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】[Claims] サブマウントまたはヒートシンク上に載置され、電気的
に分離された複数個のレーザチップからなる半導体アレ
イチップと、前記サブマウントまたはヒートシンク上に
形成され、前記半導体アレイチップから出射される複数
本の裏面レーザ光を分離して進行方向を変化させるアイ
ソレータと、このアイソレータにより分離された前記複
数本の裏面レーザ光をそれぞれモニタする複数個の受光
器とから構成したことを特徴とする半導体アレイレーザ
A semiconductor array chip consisting of a plurality of electrically isolated laser chips placed on a submount or heat sink, and a back surface of a plurality of laser chips formed on the submount or heat sink and emitted from the semiconductor array chip. A semiconductor array laser comprising: an isolator that separates laser beams and changes the direction of travel; and a plurality of light receivers that respectively monitor the plurality of backside laser beams separated by the isolator.
JP63249361A 1988-10-03 1988-10-03 Semiconductor array laser Pending JPH0297081A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63249361A JPH0297081A (en) 1988-10-03 1988-10-03 Semiconductor array laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63249361A JPH0297081A (en) 1988-10-03 1988-10-03 Semiconductor array laser

Publications (1)

Publication Number Publication Date
JPH0297081A true JPH0297081A (en) 1990-04-09

Family

ID=17191882

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63249361A Pending JPH0297081A (en) 1988-10-03 1988-10-03 Semiconductor array laser

Country Status (1)

Country Link
JP (1) JPH0297081A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0457382A (en) * 1990-06-27 1992-02-25 Nec Home Electron Ltd Laser diode device
JPH0476971A (en) * 1990-07-18 1992-03-11 Mitsubishi Electric Corp Stem for semiconductor laser
JPH05343809A (en) * 1992-06-08 1993-12-24 Sumitomo Electric Ind Ltd Semiconductor laser device system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61107787A (en) * 1984-10-30 1986-05-26 Matsushita Electric Ind Co Ltd Semiconductor laser array device
JPS61261828A (en) * 1985-05-15 1986-11-19 Olympus Optical Co Ltd Light source device for optical information recording and reproducing
JPS63204781A (en) * 1987-02-20 1988-08-24 Sanyo Electric Co Ltd Semiconductor laser device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61107787A (en) * 1984-10-30 1986-05-26 Matsushita Electric Ind Co Ltd Semiconductor laser array device
JPS61261828A (en) * 1985-05-15 1986-11-19 Olympus Optical Co Ltd Light source device for optical information recording and reproducing
JPS63204781A (en) * 1987-02-20 1988-08-24 Sanyo Electric Co Ltd Semiconductor laser device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0457382A (en) * 1990-06-27 1992-02-25 Nec Home Electron Ltd Laser diode device
JPH0476971A (en) * 1990-07-18 1992-03-11 Mitsubishi Electric Corp Stem for semiconductor laser
JPH05343809A (en) * 1992-06-08 1993-12-24 Sumitomo Electric Ind Ltd Semiconductor laser device system

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