Pulse-to-pulse coherent beat note generated by a passively Q-switched two-frequency laser
Optics Letters, Vol. 33, Issue 21, pp. 2524-2526 (2008)
http://dx.doi.org/10.1364/OL.33.002524
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Abstract
We demonstrate experimentally the pulse-to-pulse coherence of the beat note produced by a dual-polarization passively Q-switched Nd:YAG laser subjected to a frequency-shifted, polarization-rotated, optical feedback. The reinjection of one laser eigenstate into the other eigenstate ensures the phase-locking of the beat note against an external acoustic reference wave at the onset of each pulse, circumventing the intrinsic memory loss of the optical phase between successive pulses. It opens the possibility to generate optically a coherent pulsed beat note in the radio-frequency range with a subhertz linewidth, i.e., over thousands of pulses. An application to lidar radar is discussed.
© 2008 Optical Society of America
OCIS Codes
(140.3520) Lasers and laser optics : Lasers, injection-locked
(140.3540) Lasers and laser optics : Lasers, Q-switched
(280.3640) Remote sensing and sensors : Lidar
ToC Category:
Lasers and Laser Optics
History
Original Manuscript: July 24, 2008
Revised Manuscript: September 25, 2008
Manuscript Accepted: September 29, 2008
Published: October 28, 2008
Citation
Marc Brunel and Marc Vallet, "Pulse-to-pulse coherent beat note generated by a passively Q-switched two-frequency laser," Opt. Lett. 33, 2524-2526 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-21-2524
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