GB1535444A - Electromagnetic wave ring resonator - Google Patents
Electromagnetic wave ring resonatorInfo
- 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
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)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (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.
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)
| 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)
| 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)
| 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 |
-
1976
- 1976-12-13 CA CA267,744A patent/CA1077602A/en not_active Expired
- 1976-12-20 GB GB53024/76A patent/GB1535444A/en not_active Expired
- 1976-12-27 NL NL7614434A patent/NL7614434A/en not_active Application Discontinuation
- 1976-12-28 JP JP51160830A patent/JPS596518B2/en not_active Expired
- 1976-12-31 FR FR7639770A patent/FR2337447A1/en active Granted
-
1977
- 1977-01-03 IT IT19010/77A patent/IT1077505B/en active
- 1977-01-03 DE DE2700045A patent/DE2700045C2/en not_active Expired
Cited By (3)
| 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 |
|---|---|
| DE2700045C2 (en) | 1984-10-18 |
| FR2337447B1 (en) | 1982-11-19 |
| IT1077505B (en) | 1985-05-04 |
| NL7614434A (en) | 1977-07-05 |
| FR2337447A1 (en) | 1977-07-29 |
| JPS5285497A (en) | 1977-07-15 |
| CA1077602A (en) | 1980-05-13 |
| JPS596518B2 (en) | 1984-02-13 |
| DE2700045A1 (en) | 1977-07-14 |
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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 |