JPS5452562A - Variable wavelength selection filter - Google Patents
Variable wavelength selection filterInfo
- Publication number
- JPS5452562A JPS5452562A JP11924377A JP11924377A JPS5452562A JP S5452562 A JPS5452562 A JP S5452562A JP 11924377 A JP11924377 A JP 11924377A JP 11924377 A JP11924377 A JP 11924377A JP S5452562 A JPS5452562 A JP S5452562A
- Authority
- JP
- Japan
- Prior art keywords
- wavelength
- refractive index
- variable
- effective refractive
- lambda1
- 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)
- Optical Filters (AREA)
Abstract
PURPOSE:To make wavelength selection variable and further provide switching action by making use of the electro-optical effect of corrugation and substrates. CONSTITUTION:4 is a Y-cut LiNbO3 ferrodielectric substrate, 5 is a Ti diffused layer optical guide made through vapor deposition, etc. of Ti thin film, 6 is corrugations made of holography or the like and 7 is a voltage-applying Al electrode mad through vapor deposition, etc. When the light signal mixed with lambda1, lambda2, etc. is propagated in the optical guide 5, the wavelength lambda1 is branched by the corrugations having a diffraction grating width suitable for the Bragg's reflection conditions of the wavelength lambda1. The effective refractive index of the optical guide 5 is changed by applying a certain voltage in the Z axis direction of the substrate to the Al electrode 7. This causes the Bragg's reflection conditions to change even in the corrugation of the same diffraction grating width, thus enabling the signal of the wavelength lambda2 propagating next in correspondence to the change portion of the effective refractive index to be branched. This effective refractive index is variable with the applied voltage, hence the selection of the wavelengths is made variable, thus switching action by On and OFF may be effected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11924377A JPS5452562A (en) | 1977-10-03 | 1977-10-03 | Variable wavelength selection filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11924377A JPS5452562A (en) | 1977-10-03 | 1977-10-03 | Variable wavelength selection filter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5452562A true JPS5452562A (en) | 1979-04-25 |
Family
ID=14756498
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11924377A Pending JPS5452562A (en) | 1977-10-03 | 1977-10-03 | Variable wavelength selection filter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5452562A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57176004A (en) * | 1981-04-23 | 1982-10-29 | Agency Of Ind Science & Technol | Manufacture of optical element |
JPS60175025A (en) * | 1984-02-21 | 1985-09-09 | Nippon Telegr & Teleph Corp <Ntt> | Optical demultiplexer |
JPS6286327A (en) * | 1985-10-11 | 1987-04-20 | Fuji Photo Film Co Ltd | Optical modulator |
JPS649414A (en) * | 1987-07-02 | 1989-01-12 | Kokusai Denshin Denwa Co Ltd | Wavelength variable optical multiplexer and demultiplexer |
JP2009509182A (en) * | 2005-09-19 | 2009-03-05 | スウェット オプティクス ゲーエムベーハー | Process for controlling an optical element and its transfer function |
-
1977
- 1977-10-03 JP JP11924377A patent/JPS5452562A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57176004A (en) * | 1981-04-23 | 1982-10-29 | Agency Of Ind Science & Technol | Manufacture of optical element |
JPS60175025A (en) * | 1984-02-21 | 1985-09-09 | Nippon Telegr & Teleph Corp <Ntt> | Optical demultiplexer |
JPS6286327A (en) * | 1985-10-11 | 1987-04-20 | Fuji Photo Film Co Ltd | Optical modulator |
JPS649414A (en) * | 1987-07-02 | 1989-01-12 | Kokusai Denshin Denwa Co Ltd | Wavelength variable optical multiplexer and demultiplexer |
JP2009509182A (en) * | 2005-09-19 | 2009-03-05 | スウェット オプティクス ゲーエムベーハー | Process for controlling an optical element and its transfer function |
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