JPS643348U - - Google Patents
Info
- Publication number
- JPS643348U JPS643348U JP9729687U JP9729687U JPS643348U JP S643348 U JPS643348 U JP S643348U JP 9729687 U JP9729687 U JP 9729687U JP 9729687 U JP9729687 U JP 9729687U JP S643348 U JPS643348 U JP S643348U
- Authority
- JP
- Japan
- Prior art keywords
- light
- laser diode
- emitting laser
- electrical signal
- reference voltage
- 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 claims description 5
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
Landscapes
- Optical Communication System (AREA)
Description
第１図は本考案一実施例のブロツク構成図。第
２図は発光レーザダイオード動作図。
１……レーザモジユール、１Ａ……発光レーザ
ダイオード、１Ｂ……モニタ用の受光素子、２…
…レベル検出回路、３……比較回路、４……直流
電流駆動回路、５……パルス電流駆動回路、６…
…光出力低下切替回路、６Ａ，６Ｂ……スイツチ
、１０……光送信装置、１０Ａ……出力端子、１
１……光フアイバケーブル、１２……光出力、Ｐ
０……信号パルス、Ｒ１，Ｒ２……直列抵抗、Ｓ
……電気信号、Ｖ０……基準電圧。
FIG. 1 is a block diagram of an embodiment of the present invention. Figure 2 is a diagram of the operation of a light emitting laser diode. 1... Laser module, 1A... Light emitting laser diode, 1B... Light receiving element for monitoring, 2...
... Level detection circuit, 3 ... Comparison circuit, 4 ... DC current drive circuit, 5 ... Pulse current drive circuit, 6 ...
...Optical output reduction switching circuit, 6A, 6B...Switch, 10...Optical transmitter, 10A...Output terminal, 1
1...Optical fiber cable, 12...Optical output, P
0 ...Signal pulse, R1 , R2 ...Series resistance, S
...Electrical signal, V 0 ...Reference voltage.
Claims (1)
気信号に変換する受光素子と、 この電気信号のレベルを基準電圧と比較する比
較回路と、 この比較回路の出力により上記発光レーザダイ
オードに供給する電流を制御する制御回路と を備えた光送信装置において、 上記基準電圧を操作により基準値より小さい値
に設定する手段を含む ことを特徴とする光送信装置。[Claims for Utility Model Registration] A light-emitting laser diode for transmission, a light-receiving element that receives the backlight of the light-emitting laser diode and converts it into an electrical signal, a comparison circuit that compares the level of this electrical signal with a reference voltage, and a control circuit that controls the current supplied to the light emitting laser diode based on the output of the comparison circuit, characterized in that the optical transmitter includes means for setting the reference voltage to a value smaller than the reference value by operation. Optical transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9729687U JPS643348U (en) | 1987-06-26 | 1987-06-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9729687U JPS643348U (en) | 1987-06-26 | 1987-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS643348U true JPS643348U (en) | 1989-01-10 |
Family
ID=31322635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9729687U Pending JPS643348U (en) | 1987-06-26 | 1987-06-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS643348U (en) |
-
1987
- 1987-06-26 JP JP9729687U patent/JPS643348U/ja active Pending
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