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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 8 — Apr. 12, 2010
  • pp: 7714–7723

All-optical, actively Q-switched fiber laser

Robert J. Williams, Nemanja Jovanovic, Graham D. Marshall, and Michael J. Withford  »View Author Affiliations

Optics Express, Vol. 18, Issue 8, pp. 7714-7723 (2010)

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All-fiber lasers offer increased robustness and simplicity over other fiber laser systems. Current active Q-switching techniques for all-fiber lasers rely on electro-mechanical transducers to strain-tune an intra-cavity fiber-Bragg grating, which adds complexity and can lead to vibrational sensitivity. An all-optical technique for achieving active Q-switched operation is a more elegant approach and would maintain the inherent robustness and simplicity of an all-fiber laser system. In this work, we studied the optical tuning of a fiber-Bragg grating by resonant optical pumping and optimized it for application to active systems. We incorporated an optically-tunable fiber-Bragg grating into a fiber laser and demonstrated active Q-switching at 35 kHz with this all-optical, all-fiber laser system. We highlight the potential to operate at >300 kHz with the current embodiment. To our knowledge, this is the first demonstration of an optically-driven active Q-switch in a fiber laser. Further potential to operate at MHz frequencies is discussed.

© 2010 OSA

OCIS Codes
(140.3540) Lasers and laser optics : Lasers, Q-switched
(230.1150) Optical devices : All-optical devices
(320.2250) Ultrafast optics : Femtosecond phenomena
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:
Lasers and Laser Optics

Original Manuscript: January 19, 2010
Revised Manuscript: March 21, 2010
Manuscript Accepted: March 23, 2010
Published: March 30, 2010

Robert J. Williams, Nemanja Jovanovic, Graham D. Marshall, and Michael J. Withford, "All-optical, actively Q-switched fiber laser," Opt. Express 18, 7714-7723 (2010)

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