JPS55143519A - Photo branching filter - Google Patents
Photo branching filterInfo
- Publication number
- JPS55143519A JPS55143519A JP5147379A JP5147379A JPS55143519A JP S55143519 A JPS55143519 A JP S55143519A JP 5147379 A JP5147379 A JP 5147379A JP 5147379 A JP5147379 A JP 5147379A JP S55143519 A JPS55143519 A JP S55143519A
- Authority
- JP
- Japan
- Prior art keywords
- light
- phase
- delay circuit
- optical guides
- propagated
- 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
Abstract
PURPOSE:To sharpen the rise characteristic of amplitude and increase frequency band utilization rate by inserting a periodic delay circuit to at least one of the arbitrary positions of two optical guides of different electrical lengths connected by a polarizer and analyzer. CONSTITUTION:At the time when the light containing central frequencies f1,... f2n enters from an incident light guide 4, the basic wave guiding sequence of said light and the action of each constituting circuit are identical to those of known ones. In this invention, the phase of the light emitted from a double refractive crystal 3 and entered a periodic delay circuit 7 causes a delay in the phase at fixed period intervals in the delay circuit 7 and receives the stepwise change in the phase of the light. Because of this, the phase difference of the light having propagated in the two optical guides becomes integer times of pi of several times in one channel frequency interval of the branching filter 1 and therefore the phase difference may be made close to the value of pi flatly over a wide frequency band. Because of this, at the time when the light having propagated in the two optical guides 5, 6 is going to be combined in an analyzer 2, it becomes of extremely sharp rise.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54051473A JPS6049888B2 (en) | 1979-04-27 | 1979-04-27 | optical demultiplexer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54051473A JPS6049888B2 (en) | 1979-04-27 | 1979-04-27 | optical demultiplexer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55143519A true JPS55143519A (en) | 1980-11-08 |
JPS6049888B2 JPS6049888B2 (en) | 1985-11-05 |
Family
ID=12887912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54051473A Expired JPS6049888B2 (en) | 1979-04-27 | 1979-04-27 | optical demultiplexer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6049888B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58138915U (en) * | 1982-03-16 | 1983-09-19 | 日立電線株式会社 | Fiber optic demultiplexer |
JPS59155806A (en) * | 1983-02-24 | 1984-09-05 | Kokusai Denshin Denwa Co Ltd <Kdd> | Non-polarization element |
JPS6132030A (en) * | 1984-07-23 | 1986-02-14 | Nippon Telegr & Teleph Corp <Ntt> | Optical multiplexing method |
-
1979
- 1979-04-27 JP JP54051473A patent/JPS6049888B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58138915U (en) * | 1982-03-16 | 1983-09-19 | 日立電線株式会社 | Fiber optic demultiplexer |
JPS59155806A (en) * | 1983-02-24 | 1984-09-05 | Kokusai Denshin Denwa Co Ltd <Kdd> | Non-polarization element |
JPH05684B2 (en) * | 1983-02-24 | 1993-01-06 | Kokusai Denshin Denwa Co Ltd | |
JPS6132030A (en) * | 1984-07-23 | 1986-02-14 | Nippon Telegr & Teleph Corp <Ntt> | Optical multiplexing method |
Also Published As
Publication number | Publication date |
---|---|
JPS6049888B2 (en) | 1985-11-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1298387A (en) | Improvements in or relating to dielectric waveguide circuit elements | |
KR840006704A (en) | Fiber Optic Switch and Discontinuous Variable Delay Lines | |
JPS5348756A (en) | Optical fiber wave guide | |
DE2966107D1 (en) | High frequency wave guide filter | |
DE3479448D1 (en) | OPTICAL WAVE GUIDE. OPTICAL WAVEGUIDES | |
JPS5635525A (en) | Surface elastic wave resonator | |
EP0260595A3 (en) | Device for continuous polarization and phase control without resetting | |
JPS5290957A (en) | Branching filter for optical fibers | |
JPS55143519A (en) | Photo branching filter | |
JPS55163505A (en) | Light wavelength selective coupling device | |
FR2390027A1 (en) | Attenuation of slotted waveguide aerial parasitic side lobes - is achieved by plate filter installed in plane of emission | |
FR2349968A1 (en) | Microwave guide with lateral access - has opening with slotted metal sheet to provide frequency multiplexing or de-multiplexing | |
JPS6482022A (en) | Waveguide type wavelength converting element | |
JPS5310246A (en) | Attenuator for millimeter wave guide | |
JPS5286044A (en) | Branching filter using dielectric resonator | |
JPS57131101A (en) | Waveguide distributor | |
JPS56164305A (en) | Optical fiber dispersively delayed equalizer and its production | |
JPS51138362A (en) | Grouped unidirectional elastic surface wave filter | |
JPS57190387A (en) | Wavelength sweeping laser device | |
JPS536052A (en) | Optically variable branching device | |
JPS5441654A (en) | Frequency converter | |
SU394878A1 (en) | DIRECTED TAILOR | |
JPS5698922A (en) | Surface elastic wave device | |
AVERKOV et al. | Waves in unsteady-state inhomogeneous nondispersive media | |
JPS5285451A (en) | Waveguide type filter |