JPS55135437A - Optical transmission system - Google Patents

Optical transmission system

Info

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
Application number
JP4255879A
Other languages
Japanese (ja)
Other versions
JPS6017094B2 (en
Inventor
Haruhiko Tsuchiya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP54042558A priority Critical patent/JPS6017094B2/en
Publication of JPS55135437A publication Critical patent/JPS55135437A/en
Publication of JPS6017094B2 publication Critical patent/JPS6017094B2/en
Expired legal-status Critical Current

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.
JP54042558A 1979-04-10 1979-04-10 Optical transmission method Expired JPS6017094B2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5350754A (en) * 1976-10-18 1978-05-09 Nec Corp Multiplexed light separating circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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