JPS6474787A - Characteristic selector for semiconductor laser - Google Patents
Characteristic selector for semiconductor laserInfo
- Publication number
- JPS6474787A JPS6474787A JP23312287A JP23312287A JPS6474787A JP S6474787 A JPS6474787 A JP S6474787A JP 23312287 A JP23312287 A JP 23312287A JP 23312287 A JP23312287 A JP 23312287A JP S6474787 A JPS6474787 A JP S6474787A
- Authority
- JP
- Japan
- Prior art keywords
- semiconductor laser
- injection current
- current versus
- output characteristics
- optical
- 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
Landscapes
- Testing Or Measuring Of Semiconductors Or The Like (AREA)
- Semiconductor Lasers (AREA)
Abstract
PURPOSE:To execute measurement including wavelength selection efficiently without an optical spectrum measurement system, which has been used, by arranging an optical filter, through which only a wave range required is transmitted, in front of a photodetector and measuring injection current versus optical output characteristics. CONSTITUTION:When the oscillation wavelength of a semiconductor laser 2 is kept near 1310nm, the transmittance of an optical filter 3 (wavelength transmission characteristics 7) is 95%, approximately the greater part of light emitted from the semiconductor laser 2 reach a photodetector 4, and injection current versus optical output characteristics 11 are approximately equal to the case of no optical filter 3. When the oscillation wavelength of the semiconductor laser 2 is kept near 1295nm, the amount of light entering the photodetector 4 reaches 50% of the amount of emission of the semiconductor laser 2, thus bringing the gradient of injection current versus optical output characteristics 12 to 50% of the case of no optical filter 3. Accordingly, when a standard for selection is set previously regarding the gradient of injection current versus optical output characteristics the characteristics of the semiconductor laser including wavelength selection are selected without measuring an optical spectrum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23312287A JPS6474787A (en) | 1987-09-16 | 1987-09-16 | Characteristic selector for semiconductor laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23312287A JPS6474787A (en) | 1987-09-16 | 1987-09-16 | Characteristic selector for semiconductor laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6474787A true JPS6474787A (en) | 1989-03-20 |
Family
ID=16950102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23312287A Pending JPS6474787A (en) | 1987-09-16 | 1987-09-16 | Characteristic selector for semiconductor laser |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6474787A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020072237A (en) * | 2001-03-08 | 2002-09-14 | 스즈키마코토 | Conical sea-weed roll and packing sheet thereof |
-
1987
- 1987-09-16 JP JP23312287A patent/JPS6474787A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020072237A (en) * | 2001-03-08 | 2002-09-14 | 스즈키마코토 | Conical sea-weed roll and packing sheet thereof |
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