JPS6475910A - Optical fiber gyroscope - Google Patents

Optical fiber gyroscope

Info

Publication number
JPS6475910A
JPS6475910A JP23265987A JP23265987A JPS6475910A JP S6475910 A JPS6475910 A JP S6475910A JP 23265987 A JP23265987 A JP 23265987A JP 23265987 A JP23265987 A JP 23265987A JP S6475910 A JPS6475910 A JP S6475910A
Authority
JP
Japan
Prior art keywords
optical fiber
light
angular frequency
length
amplifier
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
JP23265987A
Other languages
Japanese (ja)
Inventor
Masanobu Takahashi
Shuichi Tai
Kazuo Hisama
Toshio Aranishi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP23265987A priority Critical patent/JPS6475910A/en
Publication of JPS6475910A publication Critical patent/JPS6475910A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/58—Turn-sensitive devices without moving masses
    • G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
    • G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
    • G01C19/727—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers using a passive ring resonator

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Gyroscopes (AREA)

Abstract

PURPOSE:To remove the effect of reflected light on signal light and to obtain a highly sensitive optical fiber gyroscope with low drift, by controlling the length of an optical fiber, which is coupled with an optical fiber ring, keeping the average of the phase difference between the signal light and the reflected light, and decreasing the drift of output. CONSTITUTION:Light emitted from a laser light source 1 is split into two light beams through a half mirror 3a. The light beams are received in two input ends of an optical fiber 9a, which is coupled with an optical fiber ring resonator R. The optical fiber length (14a-14b) of the optical fiber 9a is finely modulated with a specified angular frequency by using a modulator 13b. The angular frequency component in a lock-in amplifier 5b, which is a detected rotation signal that is yielded in this modulation, is detected with a lock-in amplifier 5c. Then, the optical fiber length of the fiber 9a is controlled with a phase controller 12b so that the angular frequency component becomes zero.
JP23265987A 1987-09-18 1987-09-18 Optical fiber gyroscope Pending JPS6475910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23265987A JPS6475910A (en) 1987-09-18 1987-09-18 Optical fiber gyroscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23265987A JPS6475910A (en) 1987-09-18 1987-09-18 Optical fiber gyroscope

Publications (1)

Publication Number Publication Date
JPS6475910A true JPS6475910A (en) 1989-03-22

Family

ID=16942775

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23265987A Pending JPS6475910A (en) 1987-09-18 1987-09-18 Optical fiber gyroscope

Country Status (1)

Country Link
JP (1) JPS6475910A (en)

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