JPS63100863U - - Google Patents
Info
- Publication number
- JPS63100863U JPS63100863U JP19608286U JP19608286U JPS63100863U JP S63100863 U JPS63100863 U JP S63100863U JP 19608286 U JP19608286 U JP 19608286U JP 19608286 U JP19608286 U JP 19608286U JP S63100863 U JPS63100863 U JP S63100863U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- weighting
- light
- semiconductor laser
- 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.)
- Granted
Links
- 239000004065 semiconductor Substances 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は本考案に係る半導体レーザのモニタ回
路のブロツク図、第２図は第１図のモニタ回路の
実回路図、第３図及び第４図は従来の半導体レー
ザのモニタ回路を略示した模式図である。
Ｐ１，Ｐ２，Ｐ３……ビーム、１Ａ，１Ｂ，１
Ｃ……受光素子、Ｎ１，Ｎ２，Ｎ３……減算回路
、Ｑ１，Ｑ２，Ｑ３，Ｑ４，Ｑ５……重み付け回
路、Ｍ……加算回路、Ｔ１，Ｔ２，Ｔ３……出力
端子。
FIG. 1 is a block diagram of a semiconductor laser monitor circuit according to the present invention, FIG. 2 is an actual circuit diagram of the monitor circuit of FIG. 1, and FIGS. 3 and 4 are schematic diagrams of conventional semiconductor laser monitor circuits. FIG. P 1 , P 2 , P 3 ...beam, 1A, 1B, 1
C... Light receiving element, N1, N2, N3... Subtracting circuit, Q1, Q2, Q3, Q4, Q5... Weighting circuit, M... Adding circuit, T 1 , T 2 , T 3 ... Output terminal.
Claims (1)
ザのビームの夫々を各別に受光する受光素子を並
設してモニタする半導体レーザのモニタ回路にお
いて、 前記受光素子のうち両端に位置する２つの受光
素子の出力に夫々重み付けする第１、第２の重み
付け回路と、この第１、第２の重み付け回路の出
力を加算する加算回路と、中央に位置する受光素
子の出力から前記加算回路の出力を減算する第１
の減算回路と、該減算回路の出力に重み付けする
第３の重み付け回路と、該第３の重み付け回路の
出力に各別に重み付けする第４、第５の重み付け
回路と、一端に位置する受光素子の出力から第４
の重み付け回路の出力を減算する第２の減算回路
と、他端に位置する受光素子の出力から第５の重
み付け回路の出力を減算する第３の減算回路とを
備え、前記第２及び第３の減算回路の各出力を、
一端及び他端の各ビームの光強度とし、前記第３
の重み付け回路の出力を、中央のビームの光強度
とすべく構成していることを特徴とする半導体レ
ーザのモニタ回路。[Claims for Utility Model Registration] In a semiconductor laser monitoring circuit that monitors a semiconductor laser by arranging and monitoring light-receiving elements that separately receive the beams of a semiconductor laser that emits three beams aligned in one direction, one of the light-receiving elements includes: First and second weighting circuits that respectively weight the outputs of the two light-receiving elements located at both ends, an adding circuit that adds the outputs of the first and second weighting circuits, and the output of the light-receiving element located at the center. a first subtracting the output of the adder circuit from
a subtraction circuit, a third weighting circuit that weights the output of the subtraction circuit, fourth and fifth weighting circuits that weight the output of the third weighting circuit separately, and a light receiving element located at one end. 4th from output
a second subtraction circuit that subtracts the output of the fifth weighting circuit, and a third subtraction circuit that subtracts the output of the fifth weighting circuit from the output of the light receiving element located at the other end; Each output of the subtraction circuit is
The light intensity of each beam at one end and the other end, and the third
A semiconductor laser monitor circuit characterized in that the output of the weighting circuit is configured to be the light intensity of the central beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986196082U JPH0453013Y2 (en) | 1986-12-19 | 1986-12-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986196082U JPH0453013Y2 (en) | 1986-12-19 | 1986-12-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63100863U true JPS63100863U (en) | 1988-06-30 |
| JPH0453013Y2 JPH0453013Y2 (en) | 1992-12-14 |
Family
ID=31154571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986196082U Expired JPH0453013Y2 (en) | 1986-12-19 | 1986-12-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0453013Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5874359U (en) * | 1981-11-13 | 1983-05-19 | 株式会社日立製作所 | Semiconductor laser array device |
| JPS59183576A (en) * | 1983-03-30 | 1984-10-18 | インタ−ナシヨナル ビジネス マシ−ンズ コ−ポレ−シヨン | Photodiode array signal compensating circuit |
-
1986
- 1986-12-19 JP JP1986196082U patent/JPH0453013Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5874359U (en) * | 1981-11-13 | 1983-05-19 | 株式会社日立製作所 | Semiconductor laser array device |
| JPS59183576A (en) * | 1983-03-30 | 1984-10-18 | インタ−ナシヨナル ビジネス マシ−ンズ コ−ポレ−シヨン | Photodiode array signal compensating circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0453013Y2 (en) | 1992-12-14 |
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