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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 4 — Feb. 24, 2014
  • pp: 4123–4130

Coherent polarization beam combination of four mode-locked fiber MOPAs in picosecond regime

Pengfei Ma, Rumao Tao, Xiaolin Wang, Yanxing Ma, Rongtao Su, and Pu Zhou  »View Author Affiliations


Optics Express, Vol. 22, Issue 4, pp. 4123-4130 (2014)
http://dx.doi.org/10.1364/OE.22.004123


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Abstract

In this manuscript, we report on coherent polarization beam combination (CPBC) of a four-channel pulsed amplifier array in the picosecond regime by using single frequency dithering technique. By employing a photo-detector with low-pass bandwidth (8.5 MHz at 10 dB gain) to filter the intensity fluctuation and obtain phase errors for feedback, a combined laser pulse with~480 ps pulse width at~60 MHz repetition rate is obtained with an average power of 88 W. By adjusting the optical path differences (OPDs) and controlling the pump power to ensure the synchronizations and alleviate the influence of nonlinear phases among each channel, more than 90% combining efficiency is achieved with excellent beam quality (M2~1.1). Finally, the efficiency loss of the system along with the power scaling process is discussed.

© 2014 Optical Society of America

OCIS Codes
(140.3298) Lasers and laser optics : Laser beam combining
(140.3425) Lasers and laser optics : Laser stabilization

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: November 25, 2013
Revised Manuscript: January 25, 2014
Manuscript Accepted: February 3, 2014
Published: February 14, 2014

Citation
Pengfei Ma, Rumao Tao, Xiaolin Wang, Yanxing Ma, Rongtao Su, and Pu Zhou, "Coherent polarization beam combination of four mode-locked fiber MOPAs in picosecond regime," Opt. Express 22, 4123-4130 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-4-4123


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