JPS5773633A - Light pulse testing device - Google Patents

Light pulse testing device

Info

Publication number
JPS5773633A
JPS5773633A JP15041780A JP15041780A JPS5773633A JP S5773633 A JPS5773633 A JP S5773633A JP 15041780 A JP15041780 A JP 15041780A JP 15041780 A JP15041780 A JP 15041780A JP S5773633 A JPS5773633 A JP S5773633A
Authority
JP
Japan
Prior art keywords
light
driver
ultrasonic
constitution
polarizing element
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
JP15041780A
Other languages
Japanese (ja)
Other versions
JPH0130097B2 (en
Inventor
Masataka Nakazawa
Masamitsu Tokuda
Naoya Uchida
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 JP15041780A priority Critical patent/JPS5773633A/en
Publication of JPS5773633A publication Critical patent/JPS5773633A/en
Publication of JPH0130097B2 publication Critical patent/JPH0130097B2/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
    • G01M11/3181—Reflectometers dealing with polarisation

Abstract

PURPOSE:To obtain the constitution of a less-loss device by interposing an ultrasonic-wave polarizer between a laser light source and the input terminal of an optical fiber and by separating incident light and reflected light reflected in the fiber and emitted. CONSTITUTION:Pulses from a pulse generator 11 are supplied to a Q switch driver 23 through a delay circuit 22. This driver 23 drives a YAG laser 24, and between its output and an objective lens 14, a ultrasonic-wave polarizing element 27 is arranged. The polarizing element 27 is put in operation for an adequate time through a dedicated driver 28 controlled by a pulse control circuit 29 to separate and extract laser scattering light, arriving from an optical fiber 15, from an incident optical path, thereby sending it to a photodetector 16. Its output is passed through an amplifier 17, a box Kerr integrator 18, and a logarithmic amplifier 19 to obtain a drawing on an X-Y plotter 21. Thus, the loss accompanying the separation of the incident light and emitted light is reduced and the device has increased diagnostic distance.
JP15041780A 1980-10-27 1980-10-27 Light pulse testing device Granted JPS5773633A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15041780A JPS5773633A (en) 1980-10-27 1980-10-27 Light pulse testing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15041780A JPS5773633A (en) 1980-10-27 1980-10-27 Light pulse testing device

Publications (2)

Publication Number Publication Date
JPS5773633A true JPS5773633A (en) 1982-05-08
JPH0130097B2 JPH0130097B2 (en) 1989-06-16

Family

ID=15496479

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15041780A Granted JPS5773633A (en) 1980-10-27 1980-10-27 Light pulse testing device

Country Status (1)

Country Link
JP (1) JPS5773633A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5614739A (en) * 1979-07-16 1981-02-13 Kokusai Denshin Denwa Co Ltd <Kdd> Light pulse echo detector
JPS61270632A (en) * 1985-05-25 1986-11-29 Hitachi Cable Ltd Optical fiber type measuring instrument for temperature distribution
JPH02651U (en) * 1988-06-13 1990-01-05
KR100381007B1 (en) * 2000-12-26 2003-04-26 주식회사 케이티 Method for Detecting Light And Optical Spectrometer Using Acoustic Wave

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5149737A (en) * 1974-10-25 1976-04-30 Nippon Electric Co HIKARIFUAI BADANSENKEN SASOCHI
JPS54113351A (en) * 1978-02-23 1979-09-04 Sumitomo Electric Ind Ltd Measurement of transmission loss of optical fibers
JPS5614739A (en) * 1979-07-16 1981-02-13 Kokusai Denshin Denwa Co Ltd <Kdd> Light pulse echo detector
JPS5619743U (en) * 1979-07-23 1981-02-21

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5114275A (en) * 1974-07-25 1976-02-04 Fujitsu Ltd Handotaisochino seizohoho

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5149737A (en) * 1974-10-25 1976-04-30 Nippon Electric Co HIKARIFUAI BADANSENKEN SASOCHI
JPS54113351A (en) * 1978-02-23 1979-09-04 Sumitomo Electric Ind Ltd Measurement of transmission loss of optical fibers
JPS5614739A (en) * 1979-07-16 1981-02-13 Kokusai Denshin Denwa Co Ltd <Kdd> Light pulse echo detector
JPS5619743U (en) * 1979-07-23 1981-02-21

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5614739A (en) * 1979-07-16 1981-02-13 Kokusai Denshin Denwa Co Ltd <Kdd> Light pulse echo detector
JPS6252251B2 (en) * 1979-07-16 1987-11-04 Kokusai Denshin Denwa Co Ltd
JPS61270632A (en) * 1985-05-25 1986-11-29 Hitachi Cable Ltd Optical fiber type measuring instrument for temperature distribution
JPH0364812B2 (en) * 1985-05-25 1991-10-08 Hitachi Densen Kk
JPH02651U (en) * 1988-06-13 1990-01-05
KR100381007B1 (en) * 2000-12-26 2003-04-26 주식회사 케이티 Method for Detecting Light And Optical Spectrometer Using Acoustic Wave

Also Published As

Publication number Publication date
JPH0130097B2 (en) 1989-06-16

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