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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 31 — Nov. 1, 2009
  • pp: 6008–6014

Optical triggering of a Q-switched Nd:YAG laser via transverse bleaching of a Cr:YAG saturable absorber

Brian Cole, Jonathan Lei, Tom DiLazaro, Bradley Schilling, and Lew Goldberg  »View Author Affiliations


Applied Optics, Vol. 48, Issue 31, pp. 6008-6014 (2009)
http://dx.doi.org/10.1364/AO.48.006008


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Abstract

Optical triggering via direct bleaching of a Cr:YAG saturable absorber was applied to a monolithic Nd:YAG/Cr:YAG laser crystal. The method uses a single laser diode bar to bleach a thin sheet within the saturable absorber from a direction orthogonal to the lasing axis. By placing the Q-switch at the time corresponding to the steepest slope ( d T / d t ) for change in transmission during bleaching, the pulse-to-pulse timing jitter showed a 13.2 × reduction in standard deviation, from 132 ns for free-running operation to 10 ns with optical triggering. We measured that a fluence of 60 kW / cm 2 was sufficient to enable optical triggering, where a diode appropriately sized for the length of the Cr:YAG ( 3 mm ) would then require only 150 W of optical power over a 1 2 μs duration to enable effective jitter reduction. Additionally, we measured an increase in optical-to-optical efficiency with optical triggering, where the efficiency improved from 12% to 13.5%.

© 2009 Optical Society of America

OCIS Codes
(140.3530) Lasers and laser optics : Lasers, neodymium
(140.3540) Lasers and laser optics : Lasers, Q-switched

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: June 29, 2009
Revised Manuscript: September 29, 2009
Manuscript Accepted: October 2, 2009
Published: October 27, 2009

Citation
Brian Cole, Jonathan Lei, Tom DiLazaro, Bradley Schilling, and Lew Goldberg, "Optical triggering of a Q-switched Nd:YAG laser via transverse bleaching of a Cr:YAG saturable absorber," Appl. Opt. 48, 6008-6014 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-31-6008


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