JPS5793228A - Trouble detecting device for optical transmission fiber - Google Patents

Trouble detecting device for optical transmission fiber

Info

Publication number
JPS5793228A
JPS5793228A JP16976180A JP16976180A JPS5793228A JP S5793228 A JPS5793228 A JP S5793228A JP 16976180 A JP16976180 A JP 16976180A JP 16976180 A JP16976180 A JP 16976180A JP S5793228 A JPS5793228 A JP S5793228A
Authority
JP
Japan
Prior art keywords
shutter
amplifier
light
laser light
mirror
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
JP16976180A
Other languages
Japanese (ja)
Other versions
JPH033173B2 (en
Inventor
Yuzuru Doi
Shinichi Harada
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.)
Medos Kenkyusho KK
Original Assignee
Medos Kenkyusho KK
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 Medos Kenkyusho KK filed Critical Medos Kenkyusho KK
Priority to JP16976180A priority Critical patent/JPS5793228A/en
Publication of JPS5793228A publication Critical patent/JPS5793228A/en
Publication of JPH033173B2 publication Critical patent/JPH033173B2/ja
Granted 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
    • G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

PURPOSE:To detect the damage in the transmission fiber without erroneous operation by comparing the reflected light from the emitting end of the fiber with reference light which is a part of transmitted light of laser light. CONSTITUTION:A shutter 4, which detects the trouble in the laser light reflected from the emitting end 3 of the laser transmitting fiber 2 and is operated, is provided on an optical axis of a laser light source 1. The trouble detector which is linked with the shutter 4 is provided between an inside viewing mirror 6 and the shutter 4. A mirror 7 is provided. An optical detector 8 and an amplifier 9 are arranged on the reflected optical axis of the mirror 7. The detector 10 which detects the reference light of the laser light is provided in the irradiating light source 1. A gate circuit 11 which performs ON and OFF operations of a contact switch 5 when the shutter 4 is closed from an open position is arranged, and an amplifier 12 is arranged. A differential amplifier 13 and a comparator 14 are arranged after the amplifier 9. The shutter control circuit 15 and the shutter 4 are linked together.
JP16976180A 1980-12-02 1980-12-02 Trouble detecting device for optical transmission fiber Granted JPS5793228A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16976180A JPS5793228A (en) 1980-12-02 1980-12-02 Trouble detecting device for optical transmission fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16976180A JPS5793228A (en) 1980-12-02 1980-12-02 Trouble detecting device for optical transmission fiber

Publications (2)

Publication Number Publication Date
JPS5793228A true JPS5793228A (en) 1982-06-10
JPH033173B2 JPH033173B2 (en) 1991-01-17

Family

ID=15892356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16976180A Granted JPS5793228A (en) 1980-12-02 1980-12-02 Trouble detecting device for optical transmission fiber

Country Status (1)

Country Link
JP (1) JPS5793228A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0212786A1 (en) * 1985-08-02 1987-03-04 C.R. Bard, Inc. Laser/optical fiber safety apparatus and method
FR2649803A1 (en) * 1989-07-14 1991-01-18 Tektronix Inc OPTICAL TIME REFLECTOMETER AND AUTOMATIC MASK TRIGGER FOR SUCH A REFLECTOMETER
US4994059A (en) * 1986-05-09 1991-02-19 Gv Medical, Inc. Laser catheter feedback system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0212786A1 (en) * 1985-08-02 1987-03-04 C.R. Bard, Inc. Laser/optical fiber safety apparatus and method
US4994059A (en) * 1986-05-09 1991-02-19 Gv Medical, Inc. Laser catheter feedback system
FR2649803A1 (en) * 1989-07-14 1991-01-18 Tektronix Inc OPTICAL TIME REFLECTOMETER AND AUTOMATIC MASK TRIGGER FOR SUCH A REFLECTOMETER

Also Published As

Publication number Publication date
JPH033173B2 (en) 1991-01-17

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