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Optics Letters

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  • Vol. 36, Iss. 19 — Oct. 1, 2011
  • pp: 3858–3860

88 W 0.5 mJ femtosecond laser pulses from two coherently combined fiber amplifiers

Enrico Seise, Arno Klenke, Sven Breitkopf, Jens Limpert, and Andreas Tünnermann  »View Author Affiliations


Optics Letters, Vol. 36, Issue 19, pp. 3858-3860 (2011)
http://dx.doi.org/10.1364/OL.36.003858


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Abstract

The generation of 0.5 mJ femtosecond laser pulses by coherent combining of two high power high energy fiber chirped-pulse amplifiers is reported. The system is running at a repetition frequency of 175 kHz producing 88 W of average power after the compressor unit. Polarizing beam splitters have been used to realize an amplifying Mach–Zehnder interferometer, which has been stabilized with a Hänsch–Couillaud measurement system. The stabilized system possesses a measured residual rms phase difference fluctuation between the two branches as low as λ / 70 rad at the maximum power level. The experiment proves that coherent addition of femtosecond fiber lasers can be efficiently and reliably performed at high B-integral and considerable thermal load in the individual amplifiers.

© 2011 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(140.7090) Lasers and laser optics : Ultrafast lasers
(140.3298) Lasers and laser optics : Laser beam combining

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 28, 2011
Manuscript Accepted: August 26, 2011
Published: September 26, 2011

Citation
Enrico Seise, Arno Klenke, Sven Breitkopf, Jens Limpert, and Andreas Tünnermann, "88 W 0.5 mJ femtosecond laser pulses from two coherently combined fiber amplifiers," Opt. Lett. 36, 3858-3860 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-19-3858

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