JPS54123049A - Optical switch - Google Patents
Optical switchInfo
- Publication number
- JPS54123049A JPS54123049A JP2978078A JP2978078A JPS54123049A JP S54123049 A JPS54123049 A JP S54123049A JP 2978078 A JP2978078 A JP 2978078A JP 2978078 A JP2978078 A JP 2978078A JP S54123049 A JPS54123049 A JP S54123049A
- Authority
- JP
- Japan
- Prior art keywords
- waveguides
- waveguide
- optical
- deltabetae
- result
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
- G02F1/31—Digital deflection, i.e. optical switching
- G02F1/313—Digital deflection, i.e. optical switching in an optical waveguide structure
- G02F1/3132—Digital deflection, i.e. optical switching in an optical waveguide structure of directional coupler type
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Integrated Circuits (AREA)
Abstract
PURPOSE:To reduce the total length and the loss in optical transmission by making integral two 3 dB couplers and an optical modulator in one optical waveguide composed of a linear portion. CONSTITUTION:If a voltage is impressed upon electrodes 7 and 8, the depthwise electric field is established in a concentrated manner below the electrodes. Since waveguides 2 and 3 are preset in the region having the electric field concentrated, there is established a phase difference DELTAbetaE between the waveguides. At an optical modulator 6, on the other hand, a thin film 14 for phase misalignment is mounted only on one waveguide 3. As a result, the coefficient of transmission of the waveguide 3 has been varied more than that of the waveguide 2 to that the phase difference DELTAbetaL inbetween can be made sufficiently larger than the coupling coefficient K of the intrinsic type between the two waveguides. As a result, no shift of optical waves takes place upon the phase misalignment. As a result, after the DELTAbetaL takes a preset value by the charge of the thin film 14, the intensity of the waveguides 2 and 3 at their emanating ends can be varied from 0 to 1 by varying the value DELTAbetaE within a range of ¦DELTAbetaE¦<pi.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2978078A JPS5936249B2 (en) | 1978-03-17 | 1978-03-17 | light switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2978078A JPS5936249B2 (en) | 1978-03-17 | 1978-03-17 | light switch |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54123049A true JPS54123049A (en) | 1979-09-25 |
JPS5936249B2 JPS5936249B2 (en) | 1984-09-03 |
Family
ID=12285522
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2978078A Expired JPS5936249B2 (en) | 1978-03-17 | 1978-03-17 | light switch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5936249B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5735826A (en) * | 1980-08-13 | 1982-02-26 | Nippon Telegr & Teleph Corp <Ntt> | Optical switching device |
JPS57173814A (en) * | 1981-04-20 | 1982-10-26 | Matsushita Electric Ind Co Ltd | Optical waveguide branching device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6124255A (en) * | 1984-07-13 | 1986-02-01 | Hitachi Ltd | Structure for semiconductor package |
-
1978
- 1978-03-17 JP JP2978078A patent/JPS5936249B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5735826A (en) * | 1980-08-13 | 1982-02-26 | Nippon Telegr & Teleph Corp <Ntt> | Optical switching device |
JPS57173814A (en) * | 1981-04-20 | 1982-10-26 | Matsushita Electric Ind Co Ltd | Optical waveguide branching device |
Also Published As
Publication number | Publication date |
---|---|
JPS5936249B2 (en) | 1984-09-03 |
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