[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

SE7902823L - RINGLASER GYROSCOPE - Google Patents

RINGLASER GYROSCOPE

Info

Publication number
SE7902823L
SE7902823L SE7902823A SE7902823A SE7902823L SE 7902823 L SE7902823 L SE 7902823L SE 7902823 A SE7902823 A SE 7902823A SE 7902823 A SE7902823 A SE 7902823A SE 7902823 L SE7902823 L SE 7902823L
Authority
SE
Sweden
Prior art keywords
laser
modes
primary
waves
cavity length
Prior art date
Application number
SE7902823A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE448320B (en
Inventor
V E Sanders
Original Assignee
Litton Systems Inc
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 Litton Systems Inc filed Critical Litton Systems Inc
Publication of SE7902823L publication Critical patent/SE7902823L/en
Publication of SE448320B publication Critical patent/SE448320B/en

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/58Turn-sensitive devices without moving masses
    • G01C19/64Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
    • G01C19/66Ring laser gyrometers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Remote Sensing (AREA)
  • Gyroscopes (AREA)
  • Lasers (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Lubricants (AREA)
  • Photoreceptors In Electrophotography (AREA)

Abstract

A ring laser gyroscope has one or more weaker secondary laser modes, operating slightly above the laser threshold, coupling with stronger primary counterpropagating laser modes to produce a dithering effect which reduces or eliminates lock-in between the primary modes. Cavity length control circuitry 32 may be provided to detune the cavity length to allow two secondary opposing modes (40, 42) to be generated Figure 3 (not shown). Alternatively, an external laser beam source (74) may generate the secondary waves Figures (not shown). Finally, part of one of the primary waves may leave the ring laser path through a partially reflective mirror and be acted upon by an oscillating mirror (94) which doppler- shifts the frequency. This mode is reintroduced into the ring laser path to couple with the primary mode Figure 6 (not shown). <IMAGE>
SE7902823A 1978-05-26 1979-03-29 RING LASER GYRO SE448320B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US90991978A 1978-05-26 1978-05-26

Publications (2)

Publication Number Publication Date
SE7902823L true SE7902823L (en) 1979-11-27
SE448320B SE448320B (en) 1987-02-09

Family

ID=25428045

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7902823A SE448320B (en) 1978-05-26 1979-03-29 RING LASER GYRO

Country Status (18)

Country Link
JP (1) JPS596520B2 (en)
AU (1) AU521186B2 (en)
BE (1) BE874859A (en)
BR (1) BR7901915A (en)
CA (1) CA1125895A (en)
CH (1) CH645718A5 (en)
DE (1) DE2920429A1 (en)
DK (1) DK215579A (en)
ES (1) ES479075A1 (en)
FR (1) FR2426887A1 (en)
GB (1) GB2021851B (en)
GR (1) GR66808B (en)
IL (1) IL56658A (en)
IT (1) IT1115066B (en)
NL (1) NL181953C (en)
NO (1) NO152272C (en)
NZ (1) NZ189487A (en)
SE (1) SE448320B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120839A (en) * 1982-05-19 1983-12-07 Raytheon Co Ring laser gyroscope
DE3412016C2 (en) * 1984-03-31 1986-12-11 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Ring laser
US4783169A (en) * 1985-08-09 1988-11-08 Litton Systems, Inc. Control of a ring laser gyro cavity according to a preselected model
CN103674003B (en) * 2012-09-07 2016-06-01 中国航空工业第六一八研究所 A kind of electromagnetic drive type shaking laser gyroscope mechanism

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3697181A (en) * 1967-03-14 1972-10-10 Sperry Rand Corp Ring laser having amplitude and phase controlled crossed-beam anti-locking feedback
US3741657A (en) * 1971-03-03 1973-06-26 Raytheon Co Laser gyroscope
US3846025A (en) * 1973-04-02 1974-11-05 S Wilber Frequency sensitive laser rotary motion sensor
US4152071A (en) * 1976-08-02 1979-05-01 Honeywell Inc. Control apparatus
CA1085031A (en) * 1976-11-08 1980-09-02 Litton Systems, Inc. Laser gyro with phased dithered mirrors

Also Published As

Publication number Publication date
NZ189487A (en) 1982-12-07
ES479075A1 (en) 1979-06-01
AU4398179A (en) 1979-11-29
NO791638L (en) 1979-11-27
BR7901915A (en) 1979-12-04
CH645718A5 (en) 1984-10-15
FR2426887B1 (en) 1984-06-22
BE874859A (en) 1979-07-02
FR2426887A1 (en) 1979-12-21
NO152272C (en) 1985-08-28
GB2021851A (en) 1979-12-05
AU521186B2 (en) 1982-03-18
DK215579A (en) 1979-11-27
GB2021851B (en) 1982-07-21
NL181953B (en) 1987-07-01
SE448320B (en) 1987-02-09
NO152272B (en) 1985-05-20
NL7901581A (en) 1979-11-28
JPS596520B2 (en) 1984-02-13
CA1125895A (en) 1982-06-15
IT1115066B (en) 1986-02-03
IT7948410A0 (en) 1979-03-20
JPS54155794A (en) 1979-12-08
NL181953C (en) 1987-12-01
IL56658A (en) 1981-07-31
DE2920429A1 (en) 1979-11-29
GR66808B (en) 1981-04-30

Similar Documents

Publication Publication Date Title
DE3380498D1 (en) Stabilized fiber optic sensor
EP0331303A3 (en) Second harmonic generation
CA2149156A1 (en) Semiconductor Laser Having Integrated Waveguiding Lens
DE69008415D1 (en) Frequency conversion of optical radiation.
JPS6453482A (en) Laser oscillator
SE8206389L (en) RING LASER GYRO WITH PHASE DETECTOR
JPS566492A (en) Light amplifier
SE7902823L (en) RINGLASER GYROSCOPE
DE3876031D1 (en) FREQUENCY COUPLED LASER LIGHT SOURCE.
GB2008314A (en) Face-pumped laser with diffraction-limited output beam
JPS5569115A (en) Optical coupling device
JPS55115008A (en) Semiconductor laser coupler
JPS6410224A (en) Laser device
JPS6454789A (en) External resonance type semiconductor laser
JPS6475908A (en) Optical fiber gyroscope
SE8403264D0 (en) Ring laser gyro
GB2010576A (en) Improvements in or relating to Ring Lasers
JPS551138A (en) Multi-wavelength laser beam oscillator
JPS57124491A (en) Coupler for semiconductor laser and optical fiber
JPS57132027A (en) Oscillation sensor by optical fiber
M-TEHRANI Investigations of the coherence properties of a ring laser[Ph. D. Thesis]
JPS57180191A (en) Laser for wide range of wavelength
JPS52114292A (en) Frequency sweep type laser oscillator
KANG-YIH Semiconductor laser having integrated waveguiding lens
JPS55127706A (en) Frequency optical control system of superhigh frequency active circuit

Legal Events

Date Code Title Description
NUG Patent has lapsed

Ref document number: 7902823-9

Effective date: 19900125

Format of ref document f/p: F