JPH02166780A - Optical transmitter - Google Patents
Optical transmitterInfo
- Publication number
- JPH02166780A JPH02166780A JP63320627A JP32062788A JPH02166780A JP H02166780 A JPH02166780 A JP H02166780A JP 63320627 A JP63320627 A JP 63320627A JP 32062788 A JP32062788 A JP 32062788A JP H02166780 A JPH02166780 A JP H02166780A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- comparator
- voltage
- transistor
- input
- 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 title claims description 4
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 claims 1
- 229910052729 chemical element Inorganic materials 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000007257 malfunction Effects 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
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/06808—Stabilisation of laser output parameters by monitoring the electrical laser parameters, e.g. voltage or current
-
- 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
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/06825—Protecting the laser, e.g. during switch-on/off, detection of malfunctioning or degradation
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
- Semiconductor Lasers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分桁〕
本発明は、信号入力が無いとき、LDの発光を止めると
同時に、冷却回路の動作を停市する機能に係り1%に、
LDの長寿命化と、消費電力の省力化に好適な光送信器
に関する。[Detailed Description of the Invention] [Industrial Applicability] The present invention has a function of stopping the light emission of the LD and simultaneously stopping the operation of the cooling circuit when there is no signal input.
The present invention relates to an optical transmitter suitable for extending the life of an LD and reducing power consumption.
従来の装置は、「光フアイバ応用技術集成」(日経技術
図書■)の214ページに記載のように、「ベルチェ素
子で呈温近くに制御する」となっていた。As described on page 214 of ``Optical Fiber Application Technology Collection'' (Nikkei Technical Book ■), the conventional device was ``controlled to near temperature using a Vertier element.''
また、ベルチェ素子により冷却する場合は、数Aの電流
が必要である。Moreover, when cooling with a Vertier element, a current of several amperes is required.
上記従来技術は、無信号入力時の、消費電力について配
慮されておらず、LDの寿命及び、消費電力が大きいと
いう問題があった。The above-mentioned conventional technology does not consider power consumption when no signal is input, and has problems in that the life of the LD is long and the power consumption is large.
本発明の目的は、レーザーダイオードの長寿命化と、を
子冷却回路付LD駆動回路の低消費電力化を行うことに
ある。An object of the present invention is to extend the life of a laser diode and to reduce the power consumption of an LD drive circuit with a laser diode cooling circuit.
上記目的は、信号入力の有無を判断して、LD及び、冷
却素子をオン、オフする制御回路を設けることにより達
成される。The above object is achieved by providing a control circuit that determines the presence or absence of a signal input and turns on and off the LD and the cooling element.
信号入力の有無は、整流回路を設け、この整流回路の直
流電圧を比較することによシ1判断し。The presence or absence of a signal input is determined by providing a rectifier circuit and comparing the DC voltages of this rectifier circuit.
スイッチ回路を制御する。Control the switch circuit.
このスイッチ回路によ、す、LDの駆動回路のオン、オ
フ及び、冷却回路のオン、オフを同時に行うので誤動作
することがない。This switch circuit simultaneously turns on and off the LD drive circuit and turns on and off the cooling circuit, thereby preventing malfunctions.
て実施例〕 以下1本発明の一実施例を図により説明する。Examples] An embodiment of the present invention will be described below with reference to the drawings.
LD駆動回路は、スイッチ回路−1,LDモジュール−
2,トランジスター5.6.増幅器−7,整流回路−8
,比較器−9より構成される。The LD drive circuit includes switch circuit-1, LD module-
2, Transistor 5.6. Amplifier-7, rectifier circuit-8
, comparator-9.
まず信号が、LD駆動回路に入力されているときについ
て説明する。信号は、増幅器−7で増幅され、整流器−
8で整流され、直流電圧を得る。First, the case where a signal is input to the LD drive circuit will be explained. The signal is amplified by amplifier-7 and rectifier-
8 to obtain a DC voltage.
この直流電圧とv−ioとが比較器−9で比較される。This DC voltage and v-io are compared by a comparator-9.
V−1o?!−適当な値に設定することにより、比較器
−9の出力はHとなり、スイッチ回路−1はA−0間が
接続されるため、トランジスター5が動作するので、L
D−3は発光する。また、トランジスター6も同時にオ
ンするため、ペルチェ素子−4に電流が流れる。V-1o? ! - By setting an appropriate value, the output of the comparator-9 becomes H, and since the switch circuit-1 is connected between A and 0, the transistor 5 operates, so the output becomes L.
D-3 emits light. Further, since the transistor 6 is also turned on at the same time, a current flows through the Peltier element-4.
次和、信号入力がオフしたとき、比較器−9の入力電圧
が、■より低くなることにより、比較器−9の出力がL
となる。When the signal input is turned off, the input voltage of comparator-9 becomes lower than ■, and the output of comparator-9 becomes L.
becomes.
さらに、スイッチ回路−1は、C−8間が接続されるこ
とにより、トランジスター5がオフする。Further, in the switch circuit-1, the transistor 5 is turned off by connecting C-8.
これによ、りI、D−3の発光が停止する。As a result, the light emission of lights I and D-3 is stopped.
また、トランジスター6もオフすることにより。Also, by turning off transistor 6.
ペルチェ素子−4には電流が流れなくなる。Current no longer flows through the Peltier element-4.
本発明によれば、信号入力の有無により、 LDの発光
及び停止、ベルチェ素子のオン、オフが出来るので、L
Dの長寿命化と、低消費電力化の効果がある。According to the present invention, depending on the presence or absence of a signal input, the LD can emit and stop light emission, and the Bertier element can be turned on and off.
This has the effect of extending the life of D and reducing power consumption.
図は本発明の一実施例の回路図である。
1・・・スイッチ回&!、 2・・・LDモジュール
、3・・・LD、 4・・・ベルチェ素子
。
5.6・・・トランジスタ、7・・・増幅器。
8・・・整流回路、 9・・・比較器。
10・・・直流電圧。
、/7′
代理人弁理士 小 川 勝 (男
(、The figure is a circuit diagram of an embodiment of the present invention. 1... Switch times &! , 2... LD module, 3... LD, 4... Vertier element. 5.6...transistor, 7...amplifier. 8... Rectifier circuit, 9... Comparator. 10...DC voltage. ,/7' Representative Patent Attorney Masaru Ogawa (Male)
Claims (1)
LD(レーザーダイオード)駆動回路より成る光送信器
において、信号入力検出回路と、LD枢動回路及び、電
子冷却回路をオン、オフするスイッチを設けたことを特
徴とする光送信器。1. A semiconductor laser diode module with electronic cooling;
An optical transmitter comprising an LD (laser diode) driving circuit, characterized in that the optical transmitter is provided with a switch for turning on and off a signal input detection circuit, an LD pivot circuit, and an electronic cooling circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63320627A JPH02166780A (en) | 1988-12-21 | 1988-12-21 | Optical transmitter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63320627A JPH02166780A (en) | 1988-12-21 | 1988-12-21 | Optical transmitter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02166780A true JPH02166780A (en) | 1990-06-27 |
Family
ID=18123517
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63320627A Pending JPH02166780A (en) | 1988-12-21 | 1988-12-21 | Optical transmitter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02166780A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0722678A (en) * | 1993-06-30 | 1995-01-24 | Nec Corp | Temperature control circuit |
KR100556002B1 (en) * | 2001-08-09 | 2006-03-03 | 세이코 엡슨 가부시키가이샤 | Light transmitter |
KR100893214B1 (en) * | 2007-03-22 | 2009-04-16 | 삼성전자주식회사 | Apparatus and metod for controlling optical transmission in optical network unit |
-
1988
- 1988-12-21 JP JP63320627A patent/JPH02166780A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0722678A (en) * | 1993-06-30 | 1995-01-24 | Nec Corp | Temperature control circuit |
KR100556002B1 (en) * | 2001-08-09 | 2006-03-03 | 세이코 엡슨 가부시키가이샤 | Light transmitter |
KR100893214B1 (en) * | 2007-03-22 | 2009-04-16 | 삼성전자주식회사 | Apparatus and metod for controlling optical transmission in optical network unit |
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