JPS56144588A - Circuit for stabilizing semiconductor laser output - Google Patents
Circuit for stabilizing semiconductor laser outputInfo
- Publication number
- JPS56144588A JPS56144588A JP4623480A JP4623480A JPS56144588A JP S56144588 A JPS56144588 A JP S56144588A JP 4623480 A JP4623480 A JP 4623480A JP 4623480 A JP4623480 A JP 4623480A JP S56144588 A JPS56144588 A JP S56144588A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- temperature
- detected
- output
- voltage
- 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
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
- H01S5/0687—Stabilising the frequency of the laser
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
- Semiconductor Lasers (AREA)
Abstract
PURPOSE:To stabilize the light signal output and the oscillation wavelength for PCM communication or the like by a method wherein the temperature of the laser element is detected by an interface voltage and the control of the temperature and the stabilization of the interface voltage are performed by said detected output. CONSTITUTION:A temperature controlling circuit 1a is attached to a circuit adapted to take out a light signal from a laser element 3 by direct modulation of a bias current applied thereon with a driving circuit 1. This circuit subtracts a drop in the voltage due to a series resistance component RS of the element from the terminal voltage thereof and detects an interface voltage V which is amplified and detected to obtain a DC bias component. A differential signal between the DC bias component being amplified and detected and the reference voltage activates a temperature controlling element 8. This can stabilize the temperature of a laser element 3 to ensure a stable light output thereby preventing changes in the oscillation wavelength other- wise caused by variation of the temperature. The stabilization circuit is added with a circuit adapted to control the amplitude of a driving pulse current by detecting deterioration in the pulse amplitude with a light output behind the laser element 3 to stabilize the output against secular change of the element.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4623480A JPS56144588A (en) | 1980-04-10 | 1980-04-10 | Circuit for stabilizing semiconductor laser output |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4623480A JPS56144588A (en) | 1980-04-10 | 1980-04-10 | Circuit for stabilizing semiconductor laser output |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56144588A true JPS56144588A (en) | 1981-11-10 |
Family
ID=12741421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4623480A Pending JPS56144588A (en) | 1980-04-10 | 1980-04-10 | Circuit for stabilizing semiconductor laser output |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56144588A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58182286A (en) * | 1982-04-16 | 1983-10-25 | Sanyo Electric Co Ltd | Semiconductor laser element drive circuit |
WO2023282750A1 (en) * | 2021-07-09 | 2023-01-12 | Nearfield Instruments B.V. | Laser diode arrangement, method of operating a laser diode and scanning microscope device comprising a laser diode |
-
1980
- 1980-04-10 JP JP4623480A patent/JPS56144588A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58182286A (en) * | 1982-04-16 | 1983-10-25 | Sanyo Electric Co Ltd | Semiconductor laser element drive circuit |
WO2023282750A1 (en) * | 2021-07-09 | 2023-01-12 | Nearfield Instruments B.V. | Laser diode arrangement, method of operating a laser diode and scanning microscope device comprising a laser diode |
NL2028674B1 (en) * | 2021-07-09 | 2023-01-16 | Nearfield Instr B V | Laser diode arrangement, method of operating a laser diode and scanning microscope device comprising a laser diode |
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