JPH028074U - - Google Patents
Info
- Publication number
- JPH028074U JPH028074U JP8329888U JP8329888U JPH028074U JP H028074 U JPH028074 U JP H028074U JP 8329888 U JP8329888 U JP 8329888U JP 8329888 U JP8329888 U JP 8329888U JP H028074 U JPH028074 U JP H028074U
- Authority
- JP
- Japan
- Prior art keywords
- semiconductor laser
- amount
- amplitude
- light emitted
- fluctuation
- 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
Description
第１図は本考案の一実施例を示すブロツク図、
第２図は従来例を示すブロツク図である。
１……レーザダイオード、２……フオトダイオ
ード。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram showing a conventional example. 1... Laser diode, 2... Photo diode.
Claims (1)
調する手段と、該半導体レーザの平均光量の変化
を検知し、該光量変化に応じて半導体レーザ駆動
電流をコントロールし、上記半導体レーザの平均
発光パワーを一定に保つ手段と、上記半導体レー
ザの発光光量の変動振幅を検出する手段とを有し
該変動振幅に応じて上記記録信号の振幅を負帰還
制御することを特徴とする半導体レーザパワーコ
ントロール回路。 Means for modulating the amount of light emitted by the semiconductor laser according to a recording signal, detecting a change in the average light amount of the semiconductor laser, controlling the semiconductor laser driving current according to the change in the light amount, and controlling the average light emitting power of the semiconductor laser. 1. A semiconductor laser power control circuit comprising means for keeping the amount of light emitted from the semiconductor laser constant, and means for detecting an amplitude of fluctuation in the amount of light emitted from the semiconductor laser, and negative feedback control of the amplitude of the recording signal in accordance with the amplitude of the fluctuation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8329888U JPH028074U (en) | 1988-06-23 | 1988-06-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8329888U JPH028074U (en) | 1988-06-23 | 1988-06-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH028074U true JPH028074U (en) | 1990-01-18 |
Family
ID=31308022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8329888U Pending JPH028074U (en) | 1988-06-23 | 1988-06-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH028074U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6190487A (en) * | 1984-10-11 | 1986-05-08 | Nippon Telegr & Teleph Corp <Ntt> | Semiconductor laser drive circuit |
-
1988
- 1988-06-23 JP JP8329888U patent/JPH028074U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6190487A (en) * | 1984-10-11 | 1986-05-08 | Nippon Telegr & Teleph Corp <Ntt> | Semiconductor laser drive circuit |
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