JPH02166929A - Optical transmission module - Google Patents
Optical transmission moduleInfo
- Publication number
- JPH02166929A JPH02166929A JP63320626A JP32062688A JPH02166929A JP H02166929 A JPH02166929 A JP H02166929A JP 63320626 A JP63320626 A JP 63320626A JP 32062688 A JP32062688 A JP 32062688A JP H02166929 A JPH02166929 A JP H02166929A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- module
- switching
- driving
- optical transmission
- 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 abstract description 13
- 230000005540 biological transmission Effects 0.000 title claims abstract description 6
- 230000006866 deterioration Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Optical Communication System (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、光合分波波長多重光モジュールに係り、特に
長寿命化に好適な光伝送モジュールに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical multiplexing/demultiplexing/wavelength multiplexing optical module, and particularly to an optical transmission module suitable for a long life.
従来の装置は、［電子通信学会・Ｃ３８５−７４」に記
載のように１発光素子・受光素子及び合分波ブロックを
集合した構成となっていた。The conventional device has a configuration in which one light-emitting element, one light-receiving element, and a multiplexing/demultiplexing block are assembled as described in [IEICE C385-74].
上記従来技術は、信頼性について配慮がされておらず、
特に発光素子にレーザダイオード（ＬＤ）を使用時、モ
ジュールの寿命に問題があった。The above conventional technology does not give consideration to reliability,
In particular, when a laser diode (LD) is used as a light emitting element, there is a problem with the lifespan of the module.
本発明の目的は、モジュールの長寿命を提供することに
ある。The purpose of the invention is to provide a long life of the module.
上記目的は、光モジユール内の１チャネルの発光素子を
複数個用意し、これを切換で駆動することにより達成さ
れる。The above object is achieved by preparing a plurality of one-channel light emitting elements in the optical module and driving them by switching.
第１図を用いて説明する。 This will be explained using FIG.
初期は、ＬＤモジュール−３のあるＬＤを、ＬＤ切換回
路−２により選択して使用する。この時ＬＤモジュール
−３の他のＬＤはＬＤ切換回路によりＬＤ駆動回路−１
とは切離されており発光しない状態に保たれる。Initially, the LD in the LD module 3 is selected and used by the LD switching circuit 2. At this time, the other LDs in the LD module-3 are switched to the LD drive circuit-1 by the LD switching circuit.
It is separated from the light and kept in a state where it does not emit light.
次に、使用中のＬＤが寿命等により劣化するにつれて、
Ａ Ｐ Ｃ（Ａｕｔｏ Ｐｏｗａｒ Ｃｏｎｔｒｏｌ
）回路−６により、駆動電流が増加する。この電流があ
る値（例えば、初期値の２倍）になった時、ＬＤ切換制
御回路−５が働き、ＬＤ切換回路−６が動作しＬＤモジ
ュール−３の他のＬＤに切換ねり、ＬＤ駆動回路−１に
より駆動され発光する。Next, as the LD in use deteriorates due to its lifespan,
APC (Auto Power Control)
) The drive current is increased by circuit-6. When this current reaches a certain value (for example, twice the initial value), the LD switching control circuit-5 operates, the LD switching circuit-6 operates, and switches to another LD in the LD module-3, driving the LD. It is driven by circuit-1 and emits light.
以下本発明の一実施例を第２図により説明する。 An embodiment of the present invention will be described below with reference to FIG.
図中１部は、ＬＤ切換回路、■部はＬＤ切換制御回路、
■部は、ＬＤ駆動回路を示す。In the figure, part 1 is the LD switching circuit, part ■ is the LD switching control circuit,
Part (2) shows the LD drive circuit.
初期時（発光時）は、ＬＤ−１３の駆動電流りが流れて
おり、抵抗Ｒの両端に発生する電位差を。At the initial stage (when emitting light), a driving current of LD-13 is flowing, and a potential difference occurs between both ends of the resistor R.
増幅器−８で増幅する。この時、増幅器−８の出力Ｖが
、Ｖ＞Ｖｒｅｆとなる様にＶｒｓｆを設定しておく。Amplify with amplifier-8. At this time, Vrsf is set so that the output V of the amplifier-8 satisfies V>Vref.
次にこの状態では、シュミット回路−７の出力は「ＬＯ
ｗ」レベルであり、インバーター１０の出力がｒＨｉｇ
ｈＪであるため、に部のＴＲＩはＯＮ状態、ＴＲ２はＯ
ＦＦ状態にある。そのため。Next, in this state, the output of Schmitt circuit-7 is “LO
w” level, and the output of the inverter 10 is rHigh.
Since it is hJ, TRI of the part is in the ON state and TR2 is in the O state.
It is in FF state. Therefore.
ＬＤ−１３は発光し、ＬＤ−１４は発光しない。LD-13 emits light and LD-14 does not.
経年変化により、ＬＤ−１３が劣化し、Ａ２６回路−１
２により、ＬＤ−１３の駆動電流五が増加すると、Ｖ＜
Ｖｒｅｆの状態となる。この時、シュミット回路−１３
の出力はｒＨｉｇｈＪとなり、ＴＲＩはＯＦＦ状態、Ｔ
Ｒ２はＯＮ状態となり。Due to aging, LD-13 deteriorates and A26 circuit-1
2, when the driving current of LD-13 increases, V<
The state becomes Vref. At this time, Schmitt circuit-13
The output of is rHighJ, TRI is OFF state, T
R2 becomes ON state.
ＬＤ１３は発光を停止し、ＬＤ−１４は発光する。LD13 stops emitting light, and LD-14 emits light.
またこの時、ＬＤ−１３を流れる駆動電流！は、なくな
り、増幅器−８の出力Ｖは上がるが、シュミット回路−
７の出力がｒＨｉｇｈＪであるため。Also, at this time, the drive current flowing through LD-13! disappears, and the output V of amplifier-8 increases, but the Schmitt circuit
Because the output of 7 is rHighJ.
Ｖ ｒｅｆも上がり、Ｖｒｅｆ＞Ｖの状態に保たれ、Ｌ
Ｄ−１４は発光しつづける。V ref also rises, the state of V ref > V is maintained, and L
D-14 continues to emit light.
本発明によれば、１チャネルのＬＤを複数個用意しても
１つの駆動回路により制御できるので、光伝送モジュー
ルの長寿命化、必要最低限の実装回路増加におさえられ
る効果がある。According to the present invention, even if a plurality of 1-channel LDs are prepared, they can be controlled by a single drive circuit, so that the life of the optical transmission module can be extended and the number of circuits to be mounted can be kept to the minimum necessary.
第１図は、本発明の一実施例のブロック図、第２図は同
じく回路図である。
１・・・ＬＤ駆動回路、２・・・ＬＤ切換回路、３，９
・・・モニタＰＤ付ＬＤモジュール、４・・・光合分波
器。
５・・・ＬＤ切換制御回路、６，１２・・・Ａ２６回路
。
８・・・増幅回路、１０・・・インバータ回路、１１・
・・電源、１３．１４・・・ＬＤ、７・・・シュミット
回ｉ！８゜第２図FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a circuit diagram of the same. 1... LD drive circuit, 2... LD switching circuit, 3, 9
...LD module with monitor PD, 4...Optical multiplexer/demultiplexer. 5...LD switching control circuit, 6, 12...A26 circuit. 8... Amplifier circuit, 10... Inverter circuit, 11.
...Power supply, 13.14...LD, 7...Schmidt times i! 8゜Figure 2
Claims (1)
子、駆動回路、前置増幅器、光合波分波器から構成され
る一体化波長多重モジュールにおいて、１チャネルの発
素素子を複数個と、これを駆動する１個の駆動回路を内
蔵したことを特徴とする、光伝送モジュール。1. In an integrated wavelength multiplexing module that has multiple input/output channels and is composed of a light emitting element, a light receiving element, a drive circuit, a preamplifier, and an optical multiplexer/demultiplexer, one channel can be combined with multiple light emitting elements. , an optical transmission module having a built-in driving circuit for driving the optical transmission module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63320626A JPH02166929A (en) | 1988-12-21 | 1988-12-21 | Optical transmission module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63320626A JPH02166929A (en) | 1988-12-21 | 1988-12-21 | Optical transmission module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02166929A true JPH02166929A (en) | 1990-06-27 |
Family
ID=18123506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63320626A Pending JPH02166929A (en) | 1988-12-21 | 1988-12-21 | Optical transmission module |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02166929A (en) |
-
1988
- 1988-12-21 JP JP63320626A patent/JPH02166929A/en active Pending
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