JPS5548993A - Semiconductor laser device - Google Patents
Semiconductor laser deviceInfo
- Publication number
- JPS5548993A JPS5548993A JP12288978A JP12288978A JPS5548993A JP S5548993 A JPS5548993 A JP S5548993A JP 12288978 A JP12288978 A JP 12288978A JP 12288978 A JP12288978 A JP 12288978A JP S5548993 A JPS5548993 A JP S5548993A
- Authority
- JP
- Japan
- Prior art keywords
- light
- laser
- photo
- end surface
- reflection
- 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 prevent laser from unstable operation due to reflection of light, without using a light isolator nor a reflection preventing film, by appropriately determining the relatiue value between laser output light reflecting surface and a resonator length.
CONSTITUTION: An output light 10 of a semiconductor laser 1 is gathered by a lens system 2 and combined with a photo-element 40 of a phto-fiber, etc. A part of the output light 10 is reflected by light-entering end surface of the element 40, turned into a reflecting light 11 by being gathered by the lens 2 and combined with a laser 1. when a photo-resonator length of laser 1 and a photo distance L between laser radiation end surface 5 and light-entering end surface 4 of the element 400 are set to (m+0.2)LD≤La≤(m+0.8)LD(m=0, 1, 2...), fluctuation of light output is not excessively increased even at the time when the reflection light 11 returned to laser 1 stabilizing the function of the laser. Further, the photo-resonator length and the photo-distance are to be obtained by multiplying the actual length and distance over refraction of the medium.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12288978A JPS5548993A (en) | 1978-10-04 | 1978-10-04 | Semiconductor laser device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12288978A JPS5548993A (en) | 1978-10-04 | 1978-10-04 | Semiconductor laser device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5548993A true JPS5548993A (en) | 1980-04-08 |
Family
ID=14847134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12288978A Pending JPS5548993A (en) | 1978-10-04 | 1978-10-04 | Semiconductor laser device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5548993A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5995183A (en) * | 1982-11-24 | 1984-06-01 | Ricoh Co Ltd | Marking device |
WO1985000702A1 (en) * | 1983-07-28 | 1985-02-14 | American Telephone & Telegraph Company | Coupled cavity laser |
JPS60179709A (en) * | 1984-02-28 | 1985-09-13 | Fujitsu Ltd | Optical coupling device |
JPS60221711A (en) * | 1984-03-19 | 1985-11-06 | Fujitsu Ltd | Photodetecting device |
JPS6112735U (en) * | 1984-06-29 | 1986-01-25 | 修明 岩田 | rotary printing press |
JPS61181676A (en) * | 1985-02-07 | 1986-08-14 | Fuji Xerox Co Ltd | Controller for printing position of stamper |
JPS6253765U (en) * | 1985-11-13 | 1987-04-03 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5081695A (en) * | 1973-11-21 | 1975-07-02 |
-
1978
- 1978-10-04 JP JP12288978A patent/JPS5548993A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5081695A (en) * | 1973-11-21 | 1975-07-02 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5995183A (en) * | 1982-11-24 | 1984-06-01 | Ricoh Co Ltd | Marking device |
WO1985000702A1 (en) * | 1983-07-28 | 1985-02-14 | American Telephone & Telegraph Company | Coupled cavity laser |
EP0150214A1 (en) * | 1983-07-28 | 1985-08-07 | American Telephone & Telegraph | Coupled cavity laser. |
JPS60179709A (en) * | 1984-02-28 | 1985-09-13 | Fujitsu Ltd | Optical coupling device |
JPS60221711A (en) * | 1984-03-19 | 1985-11-06 | Fujitsu Ltd | Photodetecting device |
JPS6322568B2 (en) * | 1984-03-19 | 1988-05-12 | Fujitsu Ltd | |
JPS6112735U (en) * | 1984-06-29 | 1986-01-25 | 修明 岩田 | rotary printing press |
JPS61181676A (en) * | 1985-02-07 | 1986-08-14 | Fuji Xerox Co Ltd | Controller for printing position of stamper |
JPS6253765U (en) * | 1985-11-13 | 1987-04-03 |
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