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Optics Letters

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  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 8 — Apr. 15, 2007
  • pp: 949–951

Single-frequency terahertz source pumped by Q-switched fiber lasers based on difference-frequency generation in GaSe crystal

Wei Shi, Matthew Leigh, Jie Zong, and Shibin Jiang  »View Author Affiliations


Optics Letters, Vol. 32, Issue 8, pp. 949-951 (2007)
http://dx.doi.org/10.1364/OL.32.000949


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Abstract

We demonstrate a unique terahertz (THz) source that is compact, utilizes recently developed all-fiber Q-switched lasers, and is based on difference-frequency generation in a GaSe crystal. A single piezo simultaneously Q switched the two fiber lasers by using stress-induced birefringence, to achieve the temporal overlap of pulses from the two fiber lasers. These correlated pulses then combine in the GaSe crystal to produce coherent and highly monochromatic THz pulses. The peak power for this THz source can reach 0.53 mW , corresponding to an average power of 0.43 μ W and a conversion efficiency of 4.75 × 10 7 . The estimated linewidth of this THz source can be as narrow as 35 MHz or 1.17 × 10 3 cm 1 .

© 2007 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(190.2620) Nonlinear optics : Harmonic generation and mixing

ToC Category:
Nonlinear Optics

History
Original Manuscript: October 18, 2006
Revised Manuscript: January 10, 2007
Manuscript Accepted: January 11, 2007
Published: March 19, 2007

Citation
Wei Shi, Matthew Leigh, Jie Zong, and Shibin Jiang, "Single-frequency terahertz source pumped by Q-switched fiber lasers based on difference-frequency generation in GaSe crystal," Opt. Lett. 32, 949-951 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-8-949


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