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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 14 — Jul. 7, 2008
  • pp: 10664–10674

The impact of spectral modulations on the contrast of pulses of nonlinear chirped-pulse amplification systems

Damian N. Schimpf, Enrico Seise, Jens Limpert, and Andreas Tünnermann  »View Author Affiliations

Optics Express, Vol. 16, Issue 14, pp. 10664-10674 (2008)

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A detrimental pulse distortion mechanism inherent to nonlinear chirped-pulse amplification systems is revealed and analyzed. When seeding the nonlinear amplification stage with pulses possessing weak side-pulses, the Kerr-nonlinearity causes a transfer of energy from the main pulse to side pulses. The resulting decrease in pulse contrast is determined by the accumulated nonlinear phase-shift (i.e., the B-integral) and the initial pulse-contrast. The energy transfer can be described by Bessel-functions. Thus, applications relying on a high pulse-contrast demand a low B-integral of the amplification system and a master-oscillator that exhibits an excellent pulse-contrast. In particular, nonlinear fiber CPA-systems operated at B-integrals far beyond π have to be revised in this context.

© 2008 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(140.3280) Lasers and laser optics : Laser amplifiers
(190.3270) Nonlinear optics : Kerr effect
(320.7090) Ultrafast optics : Ultrafast lasers

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: March 12, 2008
Revised Manuscript: June 9, 2008
Manuscript Accepted: June 11, 2008
Published: July 2, 2008

Damian N. Schimpf, Enrico Seise, Jens Limpert, and Andreas Tünnermann, "The impact of spectral modulations on the contrast of pulses of nonlinear chirped-pulse amplification systems," Opt. Express 16, 10664-10674 (2008)

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