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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 25 — Dec. 10, 2007
  • pp: 16308–16315

GaP waveguide emitters for high power broadband THz generation pumped by Yb-doped fiber lasers

Guoqing Chang, Charles J. Divin, Jun Yang, Malakeh A Musheinish, Steven L. Williamson, Almantas Galvanauskas, and Theodore B. Norris  »View Author Affiliations


Optics Express, Vol. 15, Issue 25, pp. 16308-16315 (2007)
http://dx.doi.org/10.1364/OE.15.016308


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Abstract

We demonstrate the generation of broadband THz pulses by optical rectification in GaP waveguides pumped by high power Yb-doped fiber amplifiers. The dispersion of the GaP emitter can be controlled via the geometry of the waveguide; the peak frequency of the emitted THz radiation is tuned by varying the waveguide cross-section. Most importantly, the use of a waveguide for the THz emission increases the coherent buildup length of the THz pulses and offers scalability to higher power; this was investigated by pumping a GaP waveguide emitter with a high power Yb-doped fiber laser system. A 25-MHz-repetition-rate pulse train of THz radiation with 120 µW average power was achieved using 14 W optical power, which represents the highest average power for a broadband THz source pumped by fiber lasers to date.

© 2007 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.7110) Nonlinear optics : Ultrafast nonlinear optics

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: October 8, 2007
Revised Manuscript: November 13, 2007
Manuscript Accepted: November 14, 2007
Published: November 26, 2007

Citation
Guoqing Chang, Charles J. Divin, Jun Yang, Malakeh A. Musheinish, Steven L. Williamson, Almantas Galvanauskas, and Theodore B. Norris, "GaP waveguide emitters for high power broadband THz generation pumped by Yb-doped fiber lasers," Opt. Express 15, 16308-16315 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-25-16308


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