JPS561014A - Optical filter of controllable transmission characteristic - Google Patents
Optical filter of controllable transmission characteristicInfo
- Publication number
- JPS561014A JPS561014A JP7662079A JP7662079A JPS561014A JP S561014 A JPS561014 A JP S561014A JP 7662079 A JP7662079 A JP 7662079A JP 7662079 A JP7662079 A JP 7662079A JP S561014 A JPS561014 A JP S561014A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- refractive index
- transmission characteristics
- optic effect
- light
- 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 make the controlling of the transmission characteristics of the optical fiber by equally dividing incident light to two lines by a 3dB optical branching filter, changing the optical path length by way of a light variable phase shifter or changing the refractive index by electro-optic effect, magneto-optic effect, acousto- optic effect or the like and combining the light by a photocoupler. CONSTITUTION:A pattern such as the one shown in the figure is formed by photolithographic techniques on LiNbO3 crystal 4 or the like. The portions 5-7 where Ti is diffused are high in refractive index and form a core layer. Thereby, the 3dB branching filter and photocoupler are formed. Electrodes 8, 9 are formed on one or both of the two central core layers 6, 7 to permit application of voltage, whereby the light variable phase shifter is constituted. As voltage is applied to the electrodes 8, 9, the refractive index changes and the transmission characteristics of the filter changes. Hence, the transmission characteristics of the filter may be controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7662079A JPS561014A (en) | 1979-06-18 | 1979-06-18 | Optical filter of controllable transmission characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7662079A JPS561014A (en) | 1979-06-18 | 1979-06-18 | Optical filter of controllable transmission characteristic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS561014A true JPS561014A (en) | 1981-01-08 |
Family
ID=13610384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7662079A Pending JPS561014A (en) | 1979-06-18 | 1979-06-18 | Optical filter of controllable transmission characteristic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS561014A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6294823A (en) * | 1985-10-22 | 1987-05-01 | Nippon Telegr & Teleph Corp <Ntt> | Waveguide type optical modulator |
| JPH01501575A (en) * | 1986-10-24 | 1989-06-01 | ブリテッシュ・テレコミュニケイションズ・パブリック・リミテッド・カンパニー | How to modulate optical signals |
| WO2011096298A1 (en) * | 2010-02-08 | 2011-08-11 | コニカミノルタホールディングス株式会社 | Display element |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5354040A (en) * | 1976-10-27 | 1978-05-17 | Nippon Telegr & Teleph Corp <Ntt> | Light modulator |
-
1979
- 1979-06-18 JP JP7662079A patent/JPS561014A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5354040A (en) * | 1976-10-27 | 1978-05-17 | Nippon Telegr & Teleph Corp <Ntt> | Light modulator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6294823A (en) * | 1985-10-22 | 1987-05-01 | Nippon Telegr & Teleph Corp <Ntt> | Waveguide type optical modulator |
| JPH01501575A (en) * | 1986-10-24 | 1989-06-01 | ブリテッシュ・テレコミュニケイションズ・パブリック・リミテッド・カンパニー | How to modulate optical signals |
| WO2011096298A1 (en) * | 2010-02-08 | 2011-08-11 | コニカミノルタホールディングス株式会社 | Display element |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4984861A (en) | Low-loss proton exchanged waveguides for active integrated optic devices and method of making same | |
| US4070092A (en) | Active waveguide branch with variable synchronism | |
| US4983006A (en) | Polarization-independent optical waveguide switch | |
| CA2176099A1 (en) | Semiconductor modulator with a shift | |
| US4561718A (en) | Photoelastic effect optical waveguides | |
| US4300814A (en) | Method for balancing an integrated optical device and a device obtained by means of said method | |
| JPS561014A (en) | Optical filter of controllable transmission characteristic | |
| JPH08194196A (en) | Production of optical waveguide device | |
| US5103491A (en) | Waveguide type optical circuit element | |
| JPS57158616A (en) | Optical coupler | |
| US4772083A (en) | Optical fiber interferometer | |
| EP0398271A3 (en) | Optical wavelength converter device | |
| CN1203361C (en) | Clad modulation wave guide type electro-optical modulator | |
| GB2191013A (en) | Tunable optical fibre filters | |
| US4199221A (en) | Electro-optic thin-film waveguide modulator device | |
| JPS5452562A (en) | Variable wavelength selection filter | |
| CN112904479A (en) | Optical switch based on reverse Fano coupling micro-ring | |
| Wei et al. | Fabrication of lithium niobate optical channel waveguides by nickel indiffusion | |
| EP0204492A3 (en) | Tunable optical fibre filters | |
| JPS54156555A (en) | Photo circuit element | |
| JPS6484230A (en) | Optical switch | |
| JPH0644086B2 (en) | Method of manufacturing light control element | |
| JPS6375726A (en) | Optical attenuator | |
| JPS5573019A (en) | Light modulating and photo switch element | |
| JPS5630116A (en) | Photo function switch |