JPS6484446A - Semiconductor laser light source device - Google Patents
Semiconductor laser light source deviceInfo
- Publication number
- JPS6484446A JPS6484446A JP62242992A JP24299287A JPS6484446A JP S6484446 A JPS6484446 A JP S6484446A JP 62242992 A JP62242992 A JP 62242992A JP 24299287 A JP24299287 A JP 24299287A JP S6484446 A JPS6484446 A JP S6484446A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- light quantity
- current
- light beam
- light
- 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
Abstract
PURPOSE:To make a feedback signal for light quantity stabilization control into a high level by providing a laser diode to monitor light quantity in addition to the laser diode to emit a light beam to be used for picture recording, etc. CONSTITUTION:The light quantity of the second light beam 12 is detected by a photodiode 24, and is outputted as the light quantity feedback signal S2 from a difference current/voltage converter 25, and a differential amplifier 23 amplifies a difference between a light quantity instruction signal S1 and the signal S2, and outputs a current instruct signal S3 to a current buffer 22, and the light quantity of the light beam 12 is controlled to a value that the signal S1 shows. Besides, the signal S3 is inputted to an adder 21 too, and the current instruction signal S5 to correct the difference between the drive current versus light output characteristics of the first and the second laser diodes 13, 14, is outputted to the current buffer 20, and a current I1 flows in the laser diode 13, and the first light beam with the same light quantity as the light beam 12 is emitted, and the light quantity of the light beam 11 is controlled to the value that the signal S1 shows.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62242992A JPS6484446A (en) | 1987-09-28 | 1987-09-28 | Semiconductor laser light source device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62242992A JPS6484446A (en) | 1987-09-28 | 1987-09-28 | Semiconductor laser light source device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6484446A true JPS6484446A (en) | 1989-03-29 |
Family
ID=17097281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62242992A Pending JPS6484446A (en) | 1987-09-28 | 1987-09-28 | Semiconductor laser light source device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6484446A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6734891B2 (en) | 2000-12-20 | 2004-05-11 | Heidelberger Druckmaschinen Ag | Method for the thermal stabilization of a laser diode in a recorder |
-
1987
- 1987-09-28 JP JP62242992A patent/JPS6484446A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6734891B2 (en) | 2000-12-20 | 2004-05-11 | Heidelberger Druckmaschinen Ag | Method for the thermal stabilization of a laser diode in a recorder |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5287375A (en) | Apparatus for driving a laser diode array | |
CA2073430A1 (en) | Laser control circuit | |
TW331049B (en) | Optoelectronic transceiver module laser diode stabilizer and bias control method | |
JPS6484446A (en) | Semiconductor laser light source device | |
JPS56106259A (en) | Control device for quantity of light | |
JPS5490982A (en) | Light output stabilizing circuit of semiconductor laser | |
JPS6489579A (en) | Fiber laser device | |
JPS6438766A (en) | Laser diode driving device | |
JPS54102885A (en) | Automatic ouput control circuit for semiconductor laser | |
YUJI et al. | Semiconductor laser light source device | |
JPS56148878A (en) | Strain compensating circuit for laser diode | |
JPS6410429A (en) | Laser diode driving device | |
JPS6476546A (en) | Automatic optical output controller for semiconductor laser | |
JPS5563895A (en) | Light output stabilization circuit | |
JPS57147291A (en) | Light transmission circuit | |
JPS62206910A (en) | Inverting type optical amplifier | |
JPS6459880A (en) | Semiconductor laser driving system | |
JPS5797691A (en) | Bias circuit for laser diode | |
JPS6420687A (en) | Drive circuit for semiconductor laser | |
JPS5776946A (en) | Automatic gain control system | |
JP2776501B2 (en) | Optical transmitter | |
JPS6464385A (en) | Optical output stabilization circuit | |
JPS5550679A (en) | Laser drive current control system | |
JPH04133533A (en) | Output stabilized light source | |
JPS572587A (en) | Bias circuit for laser diode |