JPS5722528A - Measuring method for optical fiber transmission band - Google Patents

Measuring method for optical fiber transmission band

Info

Publication number
JPS5722528A
JPS5722528A JP9698280A JP9698280A JPS5722528A JP S5722528 A JPS5722528 A JP S5722528A JP 9698280 A JP9698280 A JP 9698280A JP 9698280 A JP9698280 A JP 9698280A JP S5722528 A JPS5722528 A JP S5722528A
Authority
JP
Japan
Prior art keywords
optical fiber
transmission band
pulse
fiber
propagates
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
JP9698280A
Other languages
Japanese (ja)
Inventor
Tadatoshi Tanifuji
Masamitsu Tokuda
Tsuneo Horiguchi
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 JP9698280A priority Critical patent/JPS5722528A/en
Publication of JPS5722528A publication Critical patent/JPS5722528A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
    • G01M11/3172—Reflectometers detecting the back-scattered light in the frequency-domain, e.g. OFDR, FMCW, heterodyne detection

Abstract

PURPOSE:To connect a measuring device to only one end of an optical fiber thereby to permit transmission band measurement to be performed, by detecting an optical pulse that is reflected from the other end propagates in the opposite direction within an optical fiber and emits from one end, and by evaluating the transmission band. CONSTITUTION:A laser pulse light that is excited at a pulse generator 2 and outputted from a semiconductor 1 propagates via an optical direction coupler 3 and an exciter 7 inserted in order to excite mode distribution with good reproducibility in an optical fiber 8 to be measured. A part of the laser light reflected from the other end surface 9 of said fiber 8 propagates in the opposite direction through the fiber 8 and is detected by a detector 4. Further, by a sampling circuit 5 and an operation processing part 6, etc., the detected laser light pulse is subjected to Fourier transformation 6, and the 6dB band width of both ways is determined. Accordingly, only one end of an optical fiber is connected with a measuring device, and measurement for a transmission band is performed along with realization of easy calibration of transmitting and receiving devices, thereby allowing a highly accurate measurement to be performed.
JP9698280A 1980-07-16 1980-07-16 Measuring method for optical fiber transmission band Pending JPS5722528A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9698280A JPS5722528A (en) 1980-07-16 1980-07-16 Measuring method for optical fiber transmission band

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9698280A JPS5722528A (en) 1980-07-16 1980-07-16 Measuring method for optical fiber transmission band

Publications (1)

Publication Number Publication Date
JPS5722528A true JPS5722528A (en) 1982-02-05

Family

ID=14179413

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9698280A Pending JPS5722528A (en) 1980-07-16 1980-07-16 Measuring method for optical fiber transmission band

Country Status (1)

Country Link
JP (1) JPS5722528A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6140882U (en) * 1984-08-20 1986-03-15 律雄 中島 In-process feeder
US4659216A (en) * 1984-09-17 1987-04-21 Standard Telephones And Cables Public Limited Company Optical fibre reflectometer
JPH0714871U (en) * 1993-08-25 1995-03-14 ナガヤ工業有限会社 Squid fishing tackle support

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS536059A (en) * 1976-07-07 1978-01-20 Sumitomo Electric Ind Ltd Measuring method and apparatus for optical fiber transmission characteristics
JPS536047A (en) * 1976-07-07 1978-01-20 Sumitomo Electric Ind Ltd Optical fiber terminal reflector
JPS53140051A (en) * 1977-05-13 1978-12-06 Sumitomo Electric Ind Ltd Method and system for measuring transmission loss of optical fiber

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS536059A (en) * 1976-07-07 1978-01-20 Sumitomo Electric Ind Ltd Measuring method and apparatus for optical fiber transmission characteristics
JPS536047A (en) * 1976-07-07 1978-01-20 Sumitomo Electric Ind Ltd Optical fiber terminal reflector
JPS53140051A (en) * 1977-05-13 1978-12-06 Sumitomo Electric Ind Ltd Method and system for measuring transmission loss of optical fiber

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6140882U (en) * 1984-08-20 1986-03-15 律雄 中島 In-process feeder
US4659216A (en) * 1984-09-17 1987-04-21 Standard Telephones And Cables Public Limited Company Optical fibre reflectometer
JPH0714871U (en) * 1993-08-25 1995-03-14 ナガヤ工業有限会社 Squid fishing tackle support

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