JPS55135437A - Optical transmission system - Google Patents
Optical transmission systemInfo
- Publication number
- JPS55135437A JPS55135437A JP4255879A JP4255879A JPS55135437A JP S55135437 A JPS55135437 A JP S55135437A JP 4255879 A JP4255879 A JP 4255879A JP 4255879 A JP4255879 A JP 4255879A JP S55135437 A JPS55135437 A JP S55135437A
- Authority
- JP
- Japan
- Prior art keywords
- lambdan
- long
- lambda1
- wavelengths
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Optical Communication System (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
PURPOSE:To provide the branching function to the transmission line by using the long-size optical line featuring the different propagation constant according to the polarizing direction for the transmission line. CONSTITUTION:The long-size optical line consisting of oval core 1 and dlad 2 features the differences of DELTAbeta1-DELTAbetan to each wavelength for the propagation constant against the two orthogonal polarizing directions and to the light wave lengths lambda1-lambdan plus the substantially constant difference of DELTAbetai to the adjacent wavelengths. And the light is put into one end of the long-size line via the linear polarized, circular polarized or oval polarized wave in order to excite the light waves featuring wavelengths lambda1-lambdan in the two orthogonal polarizing directions. Then the linear polarization in which the polarizing directions of the adjacent light waves cross vertically via the optical phase unit consisting of oval core 3 and cladding 4. In addition, the branching is given to wavelengths lambda1-lambdan by polarization isolator 5, and thus these optical waves are put into photo detectors 6 and 7.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54042558A JPS6017094B2 (en) | 1979-04-10 | 1979-04-10 | Optical transmission method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54042558A JPS6017094B2 (en) | 1979-04-10 | 1979-04-10 | Optical transmission method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55135437A true JPS55135437A (en) | 1980-10-22 |
JPS6017094B2 JPS6017094B2 (en) | 1985-05-01 |
Family
ID=12639363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54042558A Expired JPS6017094B2 (en) | 1979-04-10 | 1979-04-10 | Optical transmission method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6017094B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58195802A (en) * | 1982-05-11 | 1983-11-15 | Nippon Telegr & Teleph Corp <Ntt> | Fiber type phase shifter |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5350754A (en) * | 1976-10-18 | 1978-05-09 | Nec Corp | Multiplexed light separating circuit |
-
1979
- 1979-04-10 JP JP54042558A patent/JPS6017094B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5350754A (en) * | 1976-10-18 | 1978-05-09 | Nec Corp | Multiplexed light separating circuit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58195802A (en) * | 1982-05-11 | 1983-11-15 | Nippon Telegr & Teleph Corp <Ntt> | Fiber type phase shifter |
Also Published As
Publication number | Publication date |
---|---|
JPS6017094B2 (en) | 1985-05-01 |
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