EP 1815588 A4 20100303 - METHOD AND SYSTEM FOR OPERATING A LASER SELF-MODULATED AT ALKALI-METAL ATOM HYPERFINE FREQUENCE
Title (en)
METHOD AND SYSTEM FOR OPERATING A LASER SELF-MODULATED AT ALKALI-METAL ATOM HYPERFINE FREQUENCE
Title (de)
VERFAHREN UND SYSTEM ZUM SELBSTMODULIERTEN BETRIEB EINES LASERS BEI ALKALIMETALLATOM-HYPERFEINFREQUENZ
Title (fr)
PROCEDE ET SYSTEME D'EXPLOITATION D'UN LASER AUTO-MODULE A UNE FREQUENCE HYPERFINE D'ATOME DE METAL ALCALIN
Publication
Application
Priority
- US 2005042396 W 20051122
- US 63002404 P 20041122
- US 5226105 A 20050207
- US 28406405 A 20051121
Abstract (en)
[origin: WO2006073597A2] The present invention provides a method and apparatus for making atomic clocks or atomic magnetometers as self-modulated laser systems based on the physics of push-pull optical pumping. An atomic vapor cell is required to be in the laser cavity. With proper conditions, spontaneous push-pull optical pumping can occur inside the laser cavity. This causes the laser beam to be modulated at hyperfine-resonance frequency. With a fast photodetector, the modulated laser signal can be converted into the electrical signal, which serves as the atomic clock ticking signal or magnetometer signal. The self-modulated laser system does not use any local oscillator and the microwave circuit to lock the oscillator frequency to the hyperfine-resonance frequency, and therefore can consume less power and become more compact than conventional systems. This invention will benefit applications of time measurements and magnetic-field measurements.
IPC 8 full level
H03B 17/00 (2006.01); H01S 1/06 (2006.01); H01S 3/08 (2006.01); H01S 3/106 (2006.01); H01S 3/11 (2006.01); H01S 5/065 (2006.01)
CPC (source: EP)
G04F 5/145 (2013.01); H03L 7/26 (2013.01); H01S 3/08022 (2013.01); H01S 3/1061 (2013.01); H01S 3/1115 (2013.01); H01S 3/1303 (2013.01); H01S 5/0623 (2013.01); H01S 5/065 (2013.01); H01S 5/0687 (2013.01); H01S 5/141 (2013.01)
Citation (search report)
- [Y] JP H0315779 A 19910124 - HITACHI LTD
- [Y] EP 1473605 A2 20041103 - AGILENT TECHNOLOGIES INC [US]
- [A] US 2004202050 A1 20041014 - HAPPER WILLIAM [US], et al
- [XY] HAGIMOTO K ET AL: "Stabilization of a Laser Diode with an Intracavity Cesium Cell", JPN. J. APPL. PHYS., vol. 36, December 1997 (1997-12-01), pages 7212 - 7215, XP009128282
- [X] CUNEO C J ET AL: "OPTICALLY STABILIZED DIODE LASER USING HIGH-CONTRAST SATURATED ABSORPTION", APPLIED PHYSICS LETTERS, AIP, AMERICAN INSTITUTE OF PHYSICS, MELVILLE, NY, US, vol. 64, no. 20, 16 May 1994 (1994-05-16), pages 2625 - 2627, XP000449691, ISSN: 0003-6951
- [X] VELICHANSKII V L ET AL: "SEMICONDUCTOR LASER WITH 133Cs VAPOR EXTERNAL SELECTIVE MIRROR", SOV J QUANTUM ELECTRON, vol. 8, no. 7, July 1978 (1978-07-01), pages 836 - 839, XP009128332
- See references of WO 2006073597A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
WO 2006073597 A2 20060713; WO 2006073597 A3 20070426; EP 1815588 A2 20070808; EP 1815588 A4 20100303; JP 2008522411 A 20080626
DOCDB simple family (application)
US 2005042396 W 20051122; EP 05857002 A 20051122; JP 2007543419 A 20051122