JPS54157003A - Polarization multiplex two-way optical transmission system - Google Patents

Polarization multiplex two-way optical transmission system

Info

Publication number
JPS54157003A
JPS54157003A JP6552178A JP6552178A JPS54157003A JP S54157003 A JPS54157003 A JP S54157003A JP 6552178 A JP6552178 A JP 6552178A JP 6552178 A JP6552178 A JP 6552178A JP S54157003 A JPS54157003 A JP S54157003A
Authority
JP
Japan
Prior art keywords
optical signals
lens
optical
polarizor
led
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
Application number
JP6552178A
Other languages
Japanese (ja)
Inventor
Kiyoshi Nosu
Kunio Hashimoto
Koichi Asatani
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 JP6552178A priority Critical patent/JPS54157003A/en
Publication of JPS54157003A publication Critical patent/JPS54157003A/en
Pending 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
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2589—Bidirectional transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To prevent crosstalk and the attenuation of energy to separate optical signals, by separating light pathes or optical signal on a basis of thier directions so that optical signals issued by the optical signal source of the other side may be led to photo detectors mutually. CONSTITUTION:The ray issued by optical signal source 1 is adjusted to parallel beams by lens 4 and are connected to optical fiber 3 through polarizor 8 by lens 5, and optical signals transmitted through fiber 3 are connected to polarizor 8 in the other side by lens 5 and are focused through polarizor 8 by lens 7 and are led to photo detector 2. Here, two-way optical signals are so arranged that polarization surface may be orthogonal to each other when they are transmitted through fiber 3, and light pathes of optical signals can be separated by their directions, and therefore, optical signals issued by optical signal source 1 of the other side are led to photo detectors 2 mutually. As a result, the attenuation of energy is not received because two-way optical signals are separated, and crosstalk accompanied with separation can be prevented.
JP6552178A 1978-05-31 1978-05-31 Polarization multiplex two-way optical transmission system Pending JPS54157003A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6552178A JPS54157003A (en) 1978-05-31 1978-05-31 Polarization multiplex two-way optical transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6552178A JPS54157003A (en) 1978-05-31 1978-05-31 Polarization multiplex two-way optical transmission system

Publications (1)

Publication Number Publication Date
JPS54157003A true JPS54157003A (en) 1979-12-11

Family

ID=13289403

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6552178A Pending JPS54157003A (en) 1978-05-31 1978-05-31 Polarization multiplex two-way optical transmission system

Country Status (1)

Country Link
JP (1) JPS54157003A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56116336A (en) * 1980-02-19 1981-09-12 Matsushita Electric Ind Co Ltd Overall duplicate communication system
US4566761A (en) * 1984-09-13 1986-01-28 Gte Laboratories Incorporated Birefringent optical wavelength multiplexer/demultiplexer
US4685773A (en) * 1984-09-13 1987-08-11 Gte Laboratories Incorporated Birefringent optical multiplexer with flattened bandpass
US4744075A (en) * 1987-04-02 1988-05-10 Gte Laboratories Incorporated Multichannel wavelength multiplexer/demultiplexer
US4973124A (en) * 1988-12-22 1990-11-27 Nec Corporation Wavelength drop-and-insert device
US6580535B1 (en) 1999-12-28 2003-06-17 Telefonaktiebolaget Lm Ericsson (Publ) Polarization division multiplexing in optical data transmission systems
CN110620655A (en) * 2019-05-06 2019-12-27 科大国盾量子技术股份有限公司 Polarization multiplexing bidirectional quantum key distribution method and system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51132901A (en) * 1975-05-15 1976-11-18 Nippon Telegr & Teleph Corp <Ntt> Orthogonal polarization transfer method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51132901A (en) * 1975-05-15 1976-11-18 Nippon Telegr & Teleph Corp <Ntt> Orthogonal polarization transfer method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56116336A (en) * 1980-02-19 1981-09-12 Matsushita Electric Ind Co Ltd Overall duplicate communication system
US4566761A (en) * 1984-09-13 1986-01-28 Gte Laboratories Incorporated Birefringent optical wavelength multiplexer/demultiplexer
US4685773A (en) * 1984-09-13 1987-08-11 Gte Laboratories Incorporated Birefringent optical multiplexer with flattened bandpass
US4744075A (en) * 1987-04-02 1988-05-10 Gte Laboratories Incorporated Multichannel wavelength multiplexer/demultiplexer
US4973124A (en) * 1988-12-22 1990-11-27 Nec Corporation Wavelength drop-and-insert device
US6580535B1 (en) 1999-12-28 2003-06-17 Telefonaktiebolaget Lm Ericsson (Publ) Polarization division multiplexing in optical data transmission systems
CN110620655A (en) * 2019-05-06 2019-12-27 科大国盾量子技术股份有限公司 Polarization multiplexing bidirectional quantum key distribution method and system
CN110620655B (en) * 2019-05-06 2023-01-31 科大国盾量子技术股份有限公司 Polarization multiplexing bidirectional quantum key distribution method and system

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