JPS618494B2 - - Google Patents
Info
- Publication number
- JPS618494B2 JPS618494B2 JP56041462A JP4146281A JPS618494B2 JP S618494 B2 JPS618494 B2 JP S618494B2 JP 56041462 A JP56041462 A JP 56041462A JP 4146281 A JP4146281 A JP 4146281A JP S618494 B2 JPS618494 B2 JP S618494B2
- Authority
- JP
- Japan
- 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.)
- Expired
Links
Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
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- 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
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- 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
- H01S5/06837—Stabilising otherwise than by an applied electric field or current, e.g. by controlling the temperature
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56041462A JPS57154657A (en) | 1981-03-20 | 1981-03-20 | Optical type information reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56041462A JPS57154657A (en) | 1981-03-20 | 1981-03-20 | Optical type information reproducing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57154657A JPS57154657A (en) | 1982-09-24 |
JPS618494B2 true JPS618494B2 (en) | 1986-03-14 |
Family
ID=12609033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56041462A Granted JPS57154657A (en) | 1981-03-20 | 1981-03-20 | Optical type information reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57154657A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0319595U (en) * | 1989-06-30 | 1991-02-26 | ||
JPH0453494U (en) * | 1990-09-05 | 1992-05-07 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1564729B1 (en) | 2004-02-17 | 2007-06-20 | Matsushita Electric Industrial Co., Ltd. | Optical-disk drive device |
-
1981
- 1981-03-20 JP JP56041462A patent/JPS57154657A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0319595U (en) * | 1989-06-30 | 1991-02-26 | ||
JPH0453494U (en) * | 1990-09-05 | 1992-05-07 |
Also Published As
Publication number | Publication date |
---|---|
JPS57154657A (en) | 1982-09-24 |