EP1960738A1 - Durch alternative vorspannung optisch aktiver halbleiterlaser-kreisel - Google Patents
Durch alternative vorspannung optisch aktiver halbleiterlaser-kreiselInfo
- Publication number
- EP1960738A1 EP1960738A1 EP06819925A EP06819925A EP1960738A1 EP 1960738 A1 EP1960738 A1 EP 1960738A1 EP 06819925 A EP06819925 A EP 06819925A EP 06819925 A EP06819925 A EP 06819925A EP 1960738 A1 EP1960738 A1 EP 1960738A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- optical
- phase shift
- rotator
- laser
- frequency
- 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.)
- Withdrawn
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 73
- 230000010363 phase shift Effects 0.000 claims abstract description 44
- 230000000694 effects Effects 0.000 claims description 26
- 239000007787 solid Substances 0.000 claims description 10
- 230000010355 oscillation Effects 0.000 claims description 9
- 230000006641 stabilisation Effects 0.000 claims description 8
- 238000011105 stabilization Methods 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 230000000737 periodic effect Effects 0.000 claims description 5
- 230000004044 response Effects 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000005674 electromagnetic induction Effects 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 abstract 1
- 230000010287 polarization Effects 0.000 description 19
- 230000002457 bidirectional effect Effects 0.000 description 4
- 230000003071 parasitic effect Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000368 destabilizing effect Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 229910019655 synthetic inorganic crystalline material Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 description 1
- 230000035559 beat frequency Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- HQWUQSSKOBTIHZ-UHFFFAOYSA-N gadolinium terbium Chemical compound [Gd][Tb] HQWUQSSKOBTIHZ-UHFFFAOYSA-N 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 1
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
- G01C19/66—Ring laser gyrometers
- G01C19/68—Lock-in prevention
Definitions
- the laser gyro developed about thirty years ago, is widely marketed and used today. Its operating principle is based on the Sagnac effect, which induces a frequency difference .DELTA.F between the two counter-propagating optical emission modes propagating in opposite directions, of a bidirectional ring laser cavity when it is animated by a rotation movement.
- An amplifying medium in the solid state A device for stabilizing the intensities of the counter-propagating modes; characterized in that said cavity also comprises:
- the first or the second rotator comprises at least one Faraday effect material surrounded by an electromagnetic induction coil supplied with electric current;
- the control means comprise an ultra-stable voltage reference generator which controls a stabilized current driving the periodic switching device of the current supplying the induction coil.
- the rotator may also include a magnetic shield and a magnetic field sensor.
- the intensity stabilization device comprises at least one first linear polarizer, an optical effect rotator non-reciprocal and an optical element, said optical element being either a reciprocal optical rotator, possibly induced by the use of a non-planar cavity or a birefringent element, at least one of the angles of rotation introduced on the plane of polarization of light or birefringence being adjustable.
- the polarization direction of the beam 101 rotates by + ⁇ in the forward direction and the polarization direction of the beam 102 rotates by - ⁇ in the opposite direction of propagation, so as to return to the initial direction as shown in the diagrams of FIG.
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)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0512608A FR2894663B1 (fr) | 2005-12-13 | 2005-12-13 | Gyrolaser a etat solide active optiquement par biais alternatif |
| PCT/EP2006/069440 WO2007068652A1 (fr) | 2005-12-13 | 2006-12-07 | Gyrolaser a etat solide active optiquement par biais alternatif |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1960738A1 true EP1960738A1 (de) | 2008-08-27 |
Family
ID=36764521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06819925A Withdrawn EP1960738A1 (de) | 2005-12-13 | 2006-12-07 | Durch alternative vorspannung optisch aktiver halbleiterlaser-kreisel |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8035818B2 (de) |
| EP (1) | EP1960738A1 (de) |
| FR (1) | FR2894663B1 (de) |
| WO (1) | WO2007068652A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2959811B1 (fr) | 2010-05-07 | 2013-03-01 | Thales Sa | Gyrolaser a etat solide multioscillateur stabilise passivement par un dispositif a cristal doubleur de frequence |
| US11476633B2 (en) | 2020-07-20 | 2022-10-18 | Honeywell International Inc. | Apparatus and methods for stable bidirectional output from ring laser gyroscope |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2335597A1 (de) * | 1972-07-17 | 1974-01-31 | North American Rockwell | Ringlaser-gyroskop |
| US3867034A (en) * | 1973-11-16 | 1975-02-18 | Honeywell Inc | Laser angular rate sensor biasing apparatus |
| US4222668A (en) * | 1978-02-23 | 1980-09-16 | Rockwell International Corporation | Ferrimagnetic Faraday elements for ring lasers |
| US5408492A (en) | 1993-05-21 | 1995-04-18 | Smiths Industries Aerospace & Defense Systems, Inc. | Solid medium optical ring laser rotation sensor |
| JP3531917B2 (ja) * | 2000-07-12 | 2004-05-31 | キヤノン株式会社 | リングレーザー |
| FR2825463B1 (fr) | 2001-05-30 | 2003-09-12 | Thales Sa | Gyrometre laser etat solide comportant un bloc resonateur |
| US6683692B2 (en) * | 2001-06-21 | 2004-01-27 | Honeywell International | Dither system for motion sensors |
| US6603558B2 (en) * | 2001-07-25 | 2003-08-05 | University Of Delaware | Micro-ring cavity gyroscope with magnetic field lock-in minimization |
| FR2853061B1 (fr) | 2003-03-25 | 2006-01-20 | Thales Sa | Gyrolaser a etat solide stabilise |
| FR2854947B1 (fr) * | 2003-05-16 | 2005-07-01 | Thales Sa | Gyrolaser a etat solide stabilise par des dispositifs acousto-optiques |
| FR2863702B1 (fr) | 2003-12-12 | 2006-03-03 | Thales Sa | Gyrolaser a etat solide stabilise et a milieu laser anisotrope |
| US6952366B2 (en) * | 2004-02-10 | 2005-10-04 | Micron Technology, Inc. | NROM flash memory cell with integrated DRAM |
| FR2876448B1 (fr) | 2004-03-16 | 2007-11-02 | Thales Sa | Gyrolaser a etat solide stabilise sans zone aveugle |
| FR2876447B1 (fr) | 2004-03-16 | 2007-11-02 | Thales Sa | Gyrolaser a etat solide stabilise a quatre modes sans zone aveugle |
| FR2876449B1 (fr) | 2004-10-08 | 2006-12-29 | Thales Sa | Gyrolaser a etat solide a facteur d'echelle stabilise |
| FR2877775B1 (fr) | 2004-11-05 | 2008-06-06 | Thales Sa | Gyrolaser a milieu solide semi-conducteur a structure verticale |
| US7362443B2 (en) * | 2005-11-17 | 2008-04-22 | Honeywell International Inc. | Optical gyro with free space resonator and method for sensing inertial rotation rate |
| FR2894662B1 (fr) * | 2005-12-13 | 2008-01-25 | Thales Sa | Gyrolaser a etat solide a modes contre-propagatifs orthogonaux |
| FR2905005B1 (fr) | 2006-08-18 | 2008-09-26 | Thales Sa | Gyrolaser a etat solide avec milieu a gain active mecaniquement. |
-
2005
- 2005-12-13 FR FR0512608A patent/FR2894663B1/fr not_active Expired - Fee Related
-
2006
- 2006-12-07 EP EP06819925A patent/EP1960738A1/de not_active Withdrawn
- 2006-12-07 US US12/097,429 patent/US8035818B2/en not_active Expired - Fee Related
- 2006-12-07 WO PCT/EP2006/069440 patent/WO2007068652A1/fr active Application Filing
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007068652A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007068652A1 (fr) | 2007-06-21 |
| FR2894663B1 (fr) | 2008-02-08 |
| FR2894663A1 (fr) | 2007-06-15 |
| US20110194119A1 (en) | 2011-08-11 |
| US8035818B2 (en) | 2011-10-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20080609 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE |
|
| RBV | Designated contracting states (corrected) |
Designated state(s): DE |
|
| 17Q | First examination report despatched |
Effective date: 20100203 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20100615 |