JPS55154789A - Driving circuit for semiconductor laser - Google Patents
Driving circuit for semiconductor laserInfo
- Publication number
- JPS55154789A JPS55154789A JP6215079A JP6215079A JPS55154789A JP S55154789 A JPS55154789 A JP S55154789A JP 6215079 A JP6215079 A JP 6215079A JP 6215079 A JP6215079 A JP 6215079A JP S55154789 A JPS55154789 A JP S55154789A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- pulse
- laser
- output
- duration
- 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
- 239000004065 semiconductor Substances 0.000 title abstract 2
- 230000003287 optical effect Effects 0.000 abstract 2
- 230000032683 aging Effects 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
- H01S5/06835—Stabilising during pulse modulation or generation
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
Abstract
PURPOSE:To compensate laser oscillation delay time by comparing the duration of the optical output from a laser with a reference value to control the pulse current or bias current of the laser to stabilize the optical output and further controlling the width of the input electric pulse signal. CONSTITUTION:A pulse input signal as a rectangular wave is converted through a waveform shaper 11 into a triangular wave, which is applied to a pulse duration control circuit 12. Then, the output from the circuit 12 is applied to a semiconductor laser driving circuit 13, the output of which drives the laser 14. The light output from the laser 14 is convertered through a photodiode 15 into an electric signal, which is compared by a comparator 16 to which reference value 1 is applied with the reference value 1 to alter the pulse current in the circuit 13. At this time a pulse duration setting circuit 17 is newly added between the comparator 16 and the circuit 12 to control the duration of the triangular wave produced from the circuit 12. In this manner, the light pulse may become stable against the ageing change and temperature change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6215079A JPS55154789A (en) | 1979-05-22 | 1979-05-22 | Driving circuit for semiconductor laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6215079A JPS55154789A (en) | 1979-05-22 | 1979-05-22 | Driving circuit for semiconductor laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55154789A true JPS55154789A (en) | 1980-12-02 |
Family
ID=13191779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6215079A Pending JPS55154789A (en) | 1979-05-22 | 1979-05-22 | Driving circuit for semiconductor laser |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55154789A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57138360U (en) * | 1981-02-25 | 1982-08-30 | ||
| JPS57154974A (en) * | 1981-03-19 | 1982-09-24 | Sharp Corp | Recorder |
| JPH0281072U (en) * | 1988-12-12 | 1990-06-22 |
-
1979
- 1979-05-22 JP JP6215079A patent/JPS55154789A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57138360U (en) * | 1981-02-25 | 1982-08-30 | ||
| JPS57154974A (en) * | 1981-03-19 | 1982-09-24 | Sharp Corp | Recorder |
| JPS6258585B2 (en) * | 1981-03-19 | 1987-12-07 | Sharp Kk | |
| JPH0281072U (en) * | 1988-12-12 | 1990-06-22 |
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