GB1535444A - Electromagnetic wave ring resonator - Google Patents

Electromagnetic wave ring resonator

Info

Publication number
GB1535444A
GB1535444A GB53024/76A GB5302476A GB1535444A GB 1535444 A GB1535444 A GB 1535444A GB 53024/76 A GB53024/76 A GB 53024/76A GB 5302476 A GB5302476 A GB 5302476A GB 1535444 A GB1535444 A GB 1535444A
Authority
GB
United Kingdom
Prior art keywords
mirrors
resonator
ring
resonant
beams
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.)
Expired
Application number
GB53024/76A
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.)
Raytheon Co
Original Assignee
Raytheon Co
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 Raytheon Co filed Critical Raytheon Co
Publication of GB1535444A publication Critical patent/GB1535444A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/06—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the phase of light
    • 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
    • G01C19/66—Ring laser gyrometers

Landscapes

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

Abstract

1535444 Lasers RAYTHEON CO 20 Dec 1976 [2 Jan 1976] 53024/76 Heading H1C The ring resonator of a rotational rate sensor has an even number of mirrors 12-22, Fig. 1, or 42-48, Fig. 4, in the optical path, the mirrors being so arranged that the electromagnetic field distribution of a circulated resonant beam is spatially rotated by #/2 radians for each complete passage of the ring. Due to this spatial rotation and the phase alterations effected by the mirrors, the resonator supports two oppositely directed resonant beams each having a circular polarization which is oppositely directed to the other and each of a different frequency. The resonator includes a laser active medium 24 in a magnetic field from an energized coil or magnet 30, the Zeeman effect so obtained producing a total of four resonant beams of different frequencies, two for each direction around the ring. The output beams from mirrors 20 or 44 may be used in a feedback path 40, 41 to effect resonator frequency stabilization. A suitable laser active medium may be a gas mixture comprising 8 <SP>3</SP>He + 0À48 <SP>22</SP>Ne + 0À52 <SP>20</SP>Ne.
GB53024/76A 1976-01-02 1976-12-20 Electromagnetic wave ring resonator Expired GB1535444A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64630776A 1976-01-02 1976-01-02

Publications (1)

Publication Number Publication Date
GB1535444A true GB1535444A (en) 1978-12-13

Family

ID=24592548

Family Applications (1)

Application Number Title Priority Date Filing Date
GB53024/76A Expired GB1535444A (en) 1976-01-02 1976-12-20 Electromagnetic wave ring resonator

Country Status (7)

Country Link
JP (1) JPS596518B2 (en)
CA (1) CA1077602A (en)
DE (1) DE2700045C2 (en)
FR (1) FR2337447A1 (en)
GB (1) GB1535444A (en)
IT (1) IT1077505B (en)
NL (1) NL7614434A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138625A (en) * 1983-04-20 1984-10-24 Litton Systems Inc Ring laser rotational rate sensor
GB2227879A (en) * 1989-02-03 1990-08-08 Ferranti Int Signal Multi-oscillator ring laser gyroscope

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1116279A (en) * 1978-01-03 1982-01-12 Terry A. Dorschner Laser gyroscope system
CA1132692A (en) * 1978-04-07 1982-09-28 James B. Matthews Phase-locked laser gyroscope system
DE2816937C2 (en) * 1978-04-19 1982-07-15 Basf Ag, 6700 Ludwigshafen Use of reactive dyes for dyeing cellulosic textile material or leather
FR2430598A1 (en) * 1978-07-03 1980-02-01 Litton Systems Inc Four-mode ring laser gyroscope - has reflecting mirror surfaces mounted on quartz block producing small incident angles
US4213705A (en) * 1978-11-09 1980-07-22 Litton Systems, Inc. Four mode Zeeman laser gyroscope with minimum hole burning competition
CA1189600A (en) * 1980-10-17 1985-06-25 Raytheon Company Dispersion equalized ring laser gyroscope
US4519708A (en) * 1981-05-20 1985-05-28 Raytheon Company Mode discrimination apparatus
GB2120839A (en) * 1982-05-19 1983-12-07 Raytheon Co Ring laser gyroscope
JPS6068684A (en) * 1983-09-26 1985-04-19 Fujitsu Ltd Laser light source

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1287836B (en) * 1963-12-18
US3473031A (en) * 1965-06-23 1969-10-14 Philco Ford Corp Laser transmitter for generation of simultaneous frequency modulated and unmodulated beams
US3480878A (en) * 1966-09-20 1969-11-25 Sperry Rand Corp Ring laser with means for reducing coupling to backscattered waves
US3741657A (en) * 1971-03-03 1973-06-26 Raytheon Co Laser gyroscope

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138625A (en) * 1983-04-20 1984-10-24 Litton Systems Inc Ring laser rotational rate sensor
GB2227879A (en) * 1989-02-03 1990-08-08 Ferranti Int Signal Multi-oscillator ring laser gyroscope
GB2227879B (en) * 1989-02-03 1994-02-09 Ferranti Int Signal Multi-oscillator ring laser gyroscope

Also Published As

Publication number Publication date
JPS596518B2 (en) 1984-02-13
IT1077505B (en) 1985-05-04
FR2337447B1 (en) 1982-11-19
FR2337447A1 (en) 1977-07-29
DE2700045A1 (en) 1977-07-14
DE2700045C2 (en) 1984-10-18
JPS5285497A (en) 1977-07-15
CA1077602A (en) 1980-05-13
NL7614434A (en) 1977-07-05

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19961219