JPS6472581A - Semiconductor laser device - Google Patents
Semiconductor laser deviceInfo
- Publication number
- JPS6472581A JPS6472581A JP22862087A JP22862087A JPS6472581A JP S6472581 A JPS6472581 A JP S6472581A JP 22862087 A JP22862087 A JP 22862087A JP 22862087 A JP22862087 A JP 22862087A JP S6472581 A JPS6472581 A JP S6472581A
- Authority
- JP
- Japan
- Prior art keywords
- wavelength
- laser
- oscillation
- lambda1
- lambda0
- 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 switch an oscillation wavelength of a semiconductor laser by an optical input and to switch it at a high speed by selecting an oscillation axis mode in response to an incident light on the laser by utilizing the difference of the oscillation wavelengths due to the difference of the axial modes of the laser. CONSTITUTION:A light 21 having a wavelength substantially coincident with a wavelength lambda1 is incident to a semiconductor laser 10 which has at least two oscillation axial modes of wavelengths lambda0, lambda1 and is oscillated with a wavelength lambda0 to switch the oscillation wavelength of the laser 10 from the lambda0 to the lambda1, thereby maintaining the oscillation wavelength of the laser 10 lambda1 even if the incident level of the light 21 of the wavelength substantially coincident with the wavelength lambda1 is reduced. For example, the laser beam 21 of a second semiconductor laser 20 is guided by the first semiconductor laser 10, and a laser radiation 11 of the laser 10 is produced as an output light. The laser 10 is formed into a DFB laser to be oscillated at the wavelength lambda0 in which a part of the diffraction grating is shifted by lambda/4, and the oscillated wavelength is brought into coincidence with the Bragg's wavelength.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22862087A JPS6472581A (en) | 1987-09-14 | 1987-09-14 | Semiconductor laser device |
| DE88302252T DE3884433T2 (en) | 1987-03-17 | 1988-03-15 | Laser devices. |
| EP88302252A EP0283248B1 (en) | 1987-03-17 | 1988-03-15 | Laser devices |
| US07/397,887 US4977561A (en) | 1987-03-17 | 1989-08-24 | Oscillation mode switching laser devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22862087A JPS6472581A (en) | 1987-09-14 | 1987-09-14 | Semiconductor laser device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6472581A true JPS6472581A (en) | 1989-03-17 |
Family
ID=16879196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22862087A Pending JPS6472581A (en) | 1987-03-17 | 1987-09-14 | Semiconductor laser device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6472581A (en) |
-
1987
- 1987-09-14 JP JP22862087A patent/JPS6472581A/en active Pending
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