JPH0270470U - - Google Patents
Info
- Publication number
- JPH0270470U JPH0270470U JP14927788U JP14927788U JPH0270470U JP H0270470 U JPH0270470 U JP H0270470U JP 14927788 U JP14927788 U JP 14927788U JP 14927788 U JP14927788 U JP 14927788U JP H0270470 U JPH0270470 U JP H0270470U
- Authority
- JP
- Japan
- Prior art keywords
- optical output
- reference voltage
- drive current
- semiconductor laser
- generating
- 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
- 230000003287 optical effect Effects 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims 2
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Optical Head (AREA)
Description
第１図は本考案の一実施例の構成を示す構成図
、第２図は本考案の詳細な構成を示す回路図、第
３図及び第４図は従来の光出力制御回路の構成を
示す構成図、第５図は従来の光出力制御回路の回
路構成を示す回路図である。
１……電流制御トランジスタ、２……半導体レ
ーザ、３……スイツチング素子、４……時定数回
路。
Fig. 1 is a block diagram showing the structure of an embodiment of the present invention, Fig. 2 is a circuit diagram showing the detailed structure of the present invention, and Figs. 3 and 4 show the structure of a conventional optical output control circuit. FIG. 5 is a circuit diagram showing the circuit configuration of a conventional optical output control circuit. DESCRIPTION OF SYMBOLS 1...Current control transistor, 2...Semiconductor laser, 3...Switching element, 4...Time constant circuit.
Claims (1)
御手段と、 半導体レーザの光出力に応じた信号を発生する
光出力検出手段と、 基準電圧を発生する基準電圧源とを備え、 前記光出力検出手段の出力信号と前記基準電圧
源の基準電圧とを比較することにより半導体レー
ザに供給する駆動電流を制御して光出力を安定化
する光出力制御回路であつて、 前記駆動電流制御手段の入力部にスイツチング
手段を介して時定数回路を付加したことを特徴と
する光出力制御回路。[Claims for Utility Model Registration] Drive current control means for supplying a drive current to a semiconductor laser, optical output detection means for generating a signal according to the optical output of the semiconductor laser, and a reference voltage source for generating a reference voltage. An optical output control circuit for stabilizing optical output by controlling a drive current supplied to a semiconductor laser by comparing an output signal of the optical output detection means and a reference voltage of the reference voltage source, comprising: A light output control circuit characterized in that a time constant circuit is added to the input section of the drive current control means via switching means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988149277U JPH064601Y2 (en) | 1988-11-15 | 1988-11-15 | Optical output control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988149277U JPH064601Y2 (en) | 1988-11-15 | 1988-11-15 | Optical output control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0270470U true JPH0270470U (en) | 1990-05-29 |
| JPH064601Y2 JPH064601Y2 (en) | 1994-02-02 |
Family
ID=31421361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988149277U Expired - Lifetime JPH064601Y2 (en) | 1988-11-15 | 1988-11-15 | Optical output control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH064601Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06310792A (en) * | 1993-04-22 | 1994-11-04 | Nec Corp | Optical amplifier |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6247181A (en) * | 1985-08-27 | 1987-02-28 | Konishiroku Photo Ind Co Ltd | Semiconductor laser driving circuit |
-
1988
- 1988-11-15 JP JP1988149277U patent/JPH064601Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6247181A (en) * | 1985-08-27 | 1987-02-28 | Konishiroku Photo Ind Co Ltd | Semiconductor laser driving circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06310792A (en) * | 1993-04-22 | 1994-11-04 | Nec Corp | Optical amplifier |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH064601Y2 (en) | 1994-02-02 |
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