JPS6450016A - Demultiplexing and photodetecting device - Google Patents
Demultiplexing and photodetecting deviceInfo
- Publication number
- JPS6450016A JPS6450016A JP62207893A JP20789387A JPS6450016A JP S6450016 A JPS6450016 A JP S6450016A JP 62207893 A JP62207893 A JP 62207893A JP 20789387 A JP20789387 A JP 20789387A JP S6450016 A JPS6450016 A JP S6450016A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- signal light
- wavelength
- light varies
- photodetecting
- 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
- Optical Integrated Circuits (AREA)
- Solid State Image Pick-Up Elements (AREA)
- Light Receiving Elements (AREA)
- Optical Communication System (AREA)
Abstract
PURPOSE:To hold a photodetecting level nearly constant even if signal light varies in wavelength by controlling the reflection characteristics of a filter electrically. CONSTITUTION:The filter 111 can vary wavelength 2neLAMBDA (LAMBDA: diffraction grating period of filter 111, ne: effective refractive index of filter 111) corresponding to the largest reflection factor. Namely, even if the wavelength lambda1 of signal light varies, the impressed current of the filter 111 is controlled a control circuit 131 while the mean photocurrent of a photodetecting element A is monitored so that the photocurrent is maximum, thereby controlling the effective refractive index ne of the filter 111. Consequently, the level of signal light made incident on the photodetecting element A is held nearly constant even if the signal light varies in wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62207893A JPS6450016A (en) | 1987-08-20 | 1987-08-20 | Demultiplexing and photodetecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62207893A JPS6450016A (en) | 1987-08-20 | 1987-08-20 | Demultiplexing and photodetecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6450016A true JPS6450016A (en) | 1989-02-27 |
Family
ID=16547314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62207893A Pending JPS6450016A (en) | 1987-08-20 | 1987-08-20 | Demultiplexing and photodetecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6450016A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02259733A (en) * | 1989-03-31 | 1990-10-22 | Nippon Telegr & Teleph Corp <Ntt> | Optical switch |
| JPH02297525A (en) * | 1989-05-12 | 1990-12-10 | Nippon Telegr & Teleph Corp <Ntt> | Optical matrix switch |
| JPH06130237A (en) * | 1991-06-20 | 1994-05-13 | Oki Electric Ind Co Ltd | Wavelength selection element |
| JPH08204226A (en) * | 1995-01-23 | 1996-08-09 | Agency Of Ind Science & Technol | Light receiving element |
| JPH08211427A (en) * | 1995-02-08 | 1996-08-20 | Nippon Telegr & Teleph Corp <Ntt> | Optical multiplexer and demultiplexer |
| KR100472712B1 (en) * | 2002-10-30 | 2005-03-11 | 한국과학기술연구원 | Fiber gratings, control of grating strength thereof, and optical fiber device using the same |
| WO2009144883A1 (en) * | 2008-05-28 | 2009-12-03 | 日本電気株式会社 | Semiconductor light-receiving element and method of manufacture thereof |
| WO2009144884A1 (en) * | 2008-05-28 | 2009-12-03 | 日本電気株式会社 | Semiconductor light-receiving element and method of manufacture thereof |
-
1987
- 1987-08-20 JP JP62207893A patent/JPS6450016A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02259733A (en) * | 1989-03-31 | 1990-10-22 | Nippon Telegr & Teleph Corp <Ntt> | Optical switch |
| JPH02297525A (en) * | 1989-05-12 | 1990-12-10 | Nippon Telegr & Teleph Corp <Ntt> | Optical matrix switch |
| JPH06130237A (en) * | 1991-06-20 | 1994-05-13 | Oki Electric Ind Co Ltd | Wavelength selection element |
| JPH08204226A (en) * | 1995-01-23 | 1996-08-09 | Agency Of Ind Science & Technol | Light receiving element |
| JPH08211427A (en) * | 1995-02-08 | 1996-08-20 | Nippon Telegr & Teleph Corp <Ntt> | Optical multiplexer and demultiplexer |
| KR100472712B1 (en) * | 2002-10-30 | 2005-03-11 | 한국과학기술연구원 | Fiber gratings, control of grating strength thereof, and optical fiber device using the same |
| WO2009144883A1 (en) * | 2008-05-28 | 2009-12-03 | 日本電気株式会社 | Semiconductor light-receiving element and method of manufacture thereof |
| WO2009144884A1 (en) * | 2008-05-28 | 2009-12-03 | 日本電気株式会社 | Semiconductor light-receiving element and method of manufacture thereof |
| JP5278428B2 (en) * | 2008-05-28 | 2013-09-04 | 日本電気株式会社 | Semiconductor light receiving element and manufacturing method thereof |
| JP5278429B2 (en) * | 2008-05-28 | 2013-09-04 | 日本電気株式会社 | Semiconductor light receiving element and manufacturing method thereof |
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