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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 27, Iss. 6 — Jun. 1, 2010
  • pp: 1286–1290

Gain guiding effect in end-pumped Nd : YVO 4 MOPA lasers

Xingpeng Yan, Qiang Liu, Xing Fu, Dongsheng Wang, and Mali Gong  »View Author Affiliations


JOSA B, Vol. 27, Issue 6, pp. 1286-1290 (2010)
http://dx.doi.org/10.1364/JOSAB.27.001286


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Abstract

A master oscillator power amplifier (MOPA) Nd : YVO 4 laser with a controllable gain distribution was built up in our experiment. With the gain guiding effects, the final beam quality of the MOPA system with two amplification stages was near-diffraction-limited ( M 2 1.2 ) compared with M 2 2.5 in the master oscillator, and the total extraction efficiency of amplifier stages was up to 44% corresponding to a 107 W laser output. The enhancement of the beam quality during the amplifying process was also observed in the other two MOPA lasers with the optimal gain adjusting, a MOPA laser containing a Nd : YVO 4 seed laser and four Nd : YVO 4 amplifier stages, and another MOPA laser containing a Nd:yttrium aluminum garnet acoustic-optic cavity dump pulsed seed laser and four Nd : YVO 4 amplifier stages. It has been shown for the first time to our knowledge that not only the power scaling can be realized in the MOPA configuration, but the beam quality can be enhanced as well because of the gain guiding effects.

© 2010 Optical Society of America

OCIS Codes
(140.3280) Lasers and laser optics : Laser amplifiers
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3530) Lasers and laser optics : Lasers, neodymium

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: February 25, 2010
Revised Manuscript: April 3, 2010
Manuscript Accepted: April 21, 2010
Published: May 24, 2010

Citation
Xingpeng Yan, Qiang Liu, Xing Fu, Dongsheng Wang, and Mali Gong, "Gain guiding effect in end-pumped Nd:YVO4 MOPA lasers," J. Opt. Soc. Am. B 27, 1286-1290 (2010)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-27-6-1286

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