JPS55120241A - Optical communication unit - Google Patents

Optical communication unit

Info

Publication number
JPS55120241A
JPS55120241A JP2811279A JP2811279A JPS55120241A JP S55120241 A JPS55120241 A JP S55120241A JP 2811279 A JP2811279 A JP 2811279A JP 2811279 A JP2811279 A JP 2811279A JP S55120241 A JPS55120241 A JP S55120241A
Authority
JP
Japan
Prior art keywords
terminal station
terminal
filter
lambda2
lambda1
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
JP2811279A
Other languages
Japanese (ja)
Other versions
JPS6030459B2 (en
Inventor
Tsutomu Tanaka
Yoshinobu Tsujimoto
Akimoto Serizawa
Katsuji Hattori
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP54028112A priority Critical patent/JPS6030459B2/en
Publication of JPS55120241A publication Critical patent/JPS55120241A/en
Publication of JPS6030459B2 publication Critical patent/JPS6030459B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems

Abstract

PURPOSE:To make it possible to reduce the number of transmission lines, constituting each terminal station, down to one and also to halve needed switches in an exchange in number by changing transmission over to reception, or vice versa in each terminal station by using a branching filter. CONSTITUTION:Each of terminal stations 1-4 is provided with branching filter 8, filter 9 of which allows light of waveform lambda1 to pass through and reflects that of waveform lambda2. One transmission line 7 from terminal stations 1-4 is used and the number of switches 6 in exchange 5 is halved. When terminal station 4 communicates with terminal station 2, switch 10 is connected as shown by solid lines and light emission source 11 emits light of lambda1, which reaches terminal station 2 after piercing filter 9. A light signal of lambda2 transmitted from terminal station 2, on the other hand, is reflected by filter 9 and reaches photodetector 12. Next, when terminal stations 1-3 communicate with terminal station 4, switch 10 of terminal station 4 is left connected as it is as shown broken lines and a light signal of lambda1 transmitted from terminal stations 1-3 reaches photodetector 12 and terminal station 4 sends the signal of lambda2 from light emission source 13.
JP54028112A 1979-03-09 1979-03-09 optical communication equipment Expired JPS6030459B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54028112A JPS6030459B2 (en) 1979-03-09 1979-03-09 optical communication equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54028112A JPS6030459B2 (en) 1979-03-09 1979-03-09 optical communication equipment

Publications (2)

Publication Number Publication Date
JPS55120241A true JPS55120241A (en) 1980-09-16
JPS6030459B2 JPS6030459B2 (en) 1985-07-16

Family

ID=12239724

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54028112A Expired JPS6030459B2 (en) 1979-03-09 1979-03-09 optical communication equipment

Country Status (1)

Country Link
JP (1) JPS6030459B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4551829A (en) * 1982-03-10 1985-11-05 Harris Corporation Wavelength division multiplexed fiber-optic cable system with non-unique terminal types
US4736359A (en) * 1986-05-06 1988-04-05 Itt Defense Communications , A Division Of Itt Corporation Single fiber optical communication system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6179367U (en) * 1984-10-27 1986-05-27

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4551829A (en) * 1982-03-10 1985-11-05 Harris Corporation Wavelength division multiplexed fiber-optic cable system with non-unique terminal types
US4736359A (en) * 1986-05-06 1988-04-05 Itt Defense Communications , A Division Of Itt Corporation Single fiber optical communication system

Also Published As

Publication number Publication date
JPS6030459B2 (en) 1985-07-16

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