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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 19 — Sep. 15, 2008
  • pp: 15074–15089

High fidelity femtosecond pulses from an ultrafast fiber laser system via adaptive amplitude and phase pre-shaping

Jerry Prawiharjo, Nikita K. Daga, Rui Geng, Jonathan H.V. Price, David C. Hanna, David J. Richardson, and David P. Shepherd  »View Author Affiliations


Optics Express, Vol. 16, Issue 19, pp. 15074-15089 (2008)
http://dx.doi.org/10.1364/OE.16.015074


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Abstract

The generation of high-fidelity femtosecond pulses is experimentally demonstrated in a fiber based chirped-pulse amplification (CPA) system through an adaptive amplitude and phase pre-shaping technique. A pulse shaper, based on a dual-layer liquid crystal spatial light modulator (LC-SLM), was implemented in the fiber CPA system for amplitude and phase shaping prior to amplification. The LC-SLM was controlled using a differential evolution algorithm, to maximize a two-photon absorption detector signal from the compressed fiber CPA output pulses. It is shown that this approach compensates for both accumulated phase from material dispersion and nonlinear phase modulation. A train of pulses was produced with an average power of 12.6W at a 50MHz repetition rate from our fiber CPA system, which were compressible to high fidelity pulses with a duration of 170 fs.

© 2008 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(320.5540) Ultrafast optics : Pulse shaping
(320.7090) Ultrafast optics : Ultrafast lasers

ToC Category:
Ultrafast Optics

History
Original Manuscript: July 1, 2008
Revised Manuscript: August 15, 2008
Manuscript Accepted: August 15, 2008
Published: September 10, 2008

Citation
Jerry Prawiharjo, Nikita K. Daga, Rui Geng, Jonathan H. Price, David C. Hanna, David J. Richardson, and David P. Shepherd, "High fidelity femtosecond pulses from an ultrafast fiber laser system via adaptive amplitude and phase pre-shaping," Opt. Express 16, 15074-15089 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-19-15074


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