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Optics Letters

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  • Vol. 36, Iss. 18 — Sep. 15, 2011
  • pp: 3575–3577

220 μJ monolithic single-frequency Q-switched fiber laser at 2 μm by using highly Tm-doped germanate fibers

Wei Shi, Eliot B. Petersen, Dan T. Nguyen, Zhidong Yao, Arturo Chavez-Pirson, N. Peyghambarian, and Jirong Yu  »View Author Affiliations


Optics Letters, Vol. 36, Issue 18, pp. 3575-3577 (2011)
http://dx.doi.org/10.1364/OL.36.003575


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Abstract

We report a unique all fiber-based single-frequency Q-switched laser in a monolithic master oscillator power amplifier configuration at 1920 nm by using highly Tm-doped germanate fibers for the first time. The actively Q-switched fiber laser seed was achieved by using a piezo to press the fiber in the fiber Bragg grating cavity and modulate the fiber birefringence, enabling Q-switching with pulse width and repetition rate tunability. A single-mode polarization maintaining large core 25 μm highly Tm-doped germanate fiber was used in the power amplifier stage. For 80 ns pulses with 20 kHz repetition rate, we achieved 220 μJ pulse energy, which corresponds to a peak power of 2.75 kW with transform-limited linewidth.

© 2011 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3540) Lasers and laser optics : Lasers, Q-switched
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 8, 2011
Revised Manuscript: August 13, 2011
Manuscript Accepted: August 13, 2011
Published: September 9, 2011

Citation
Wei Shi, Eliot B. Petersen, Dan T. Nguyen, Zhidong Yao, Arturo Chavez-Pirson, N. Peyghambarian, and Jirong Yu, "220 μJ monolithic single-frequency Q-switched fiber laser at 2 μmby using highly Tm-doped germanate fibers," Opt. Lett. 36, 3575-3577 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-18-3575


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