JPS5626233A - Method and device for measurement of fluctuation of dynamic pressure applied to optical fiber - Google Patents

Method and device for measurement of fluctuation of dynamic pressure applied to optical fiber

Info

Publication number
JPS5626233A
JPS5626233A JP10229079A JP10229079A JPS5626233A JP S5626233 A JPS5626233 A JP S5626233A JP 10229079 A JP10229079 A JP 10229079A JP 10229079 A JP10229079 A JP 10229079A JP S5626233 A JPS5626233 A JP S5626233A
Authority
JP
Japan
Prior art keywords
fluctuation
phase
amplifier
optical
measurement
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
JP10229079A
Other languages
Japanese (ja)
Inventor
Noburu Shibata
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 JP10229079A priority Critical patent/JPS5626233A/en
Publication of JPS5626233A publication Critical patent/JPS5626233A/en
Pending legal-status Critical Current

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  • Measuring Fluid Pressure (AREA)

Abstract

PURPOSE: To realize a faithful and high-accuracy measurement for the voltage fluctuation, by measuring the fluctuation of the dynamic voltage applied to the optical fiber from the phase variation of the light itself propagating and by the optical heterodyne system.
CONSTITUTION: The zero-dimensional and primary diffracted rays 3 and 4 of the black region of the interferential light source diffracted by acoustic-optical modulator 2 enter optical fibers 8 and 7 for measurement and reference each. And the rays of different optical paths passing through mirror 9 and half-mirror 10 each interfere each other to detect the beat signal by light receiver 11. And the phase term is extracted by the FM wave detection via frequency discriminator 12, and the frequency is selected through BPF13 to be applied to lock-in amplifier 11. The reference signal sent from distortion sensitivity element 15 loaded to fiber 7 having the same frequency and a fixed phase relation as and with the above signal applied to amplifier 11 is also applied to amplifier 11. Thus the variation of the phase of the light itself propagating is measured by the heterodyne system. As a result, the fluctuation of the dynamic voltage which is caused by the phase fluctuation corresponding to the voltage fluctuation and in accordance with the dynamic fluctuation in the longer side direction of the fiber can be measured in a high accuracy.
COPYRIGHT: (C)1981,JPO&Japio
JP10229079A 1979-08-13 1979-08-13 Method and device for measurement of fluctuation of dynamic pressure applied to optical fiber Pending JPS5626233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10229079A JPS5626233A (en) 1979-08-13 1979-08-13 Method and device for measurement of fluctuation of dynamic pressure applied to optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10229079A JPS5626233A (en) 1979-08-13 1979-08-13 Method and device for measurement of fluctuation of dynamic pressure applied to optical fiber

Publications (1)

Publication Number Publication Date
JPS5626233A true JPS5626233A (en) 1981-03-13

Family

ID=14323473

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10229079A Pending JPS5626233A (en) 1979-08-13 1979-08-13 Method and device for measurement of fluctuation of dynamic pressure applied to optical fiber

Country Status (1)

Country Link
JP (1) JPS5626233A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57190238A (en) * 1981-05-19 1982-11-22 Toshiba Corp Photo load detector
WO1983001303A1 (en) * 1981-10-07 1983-04-14 Mc Donnell Douglas Corp Improved compact optical gyro
JPS58114743U (en) * 1982-01-30 1983-08-05 トヨタ自動車株式会社 pressure-light converter
JPS62152395A (en) * 1985-12-24 1987-07-07 Hitachi Ltd Winding type induction machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57190238A (en) * 1981-05-19 1982-11-22 Toshiba Corp Photo load detector
WO1983001303A1 (en) * 1981-10-07 1983-04-14 Mc Donnell Douglas Corp Improved compact optical gyro
JPS58114743U (en) * 1982-01-30 1983-08-05 トヨタ自動車株式会社 pressure-light converter
JPS62152395A (en) * 1985-12-24 1987-07-07 Hitachi Ltd Winding type induction machine

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