Analysis of Pump-Induced Temporal Contrast Degradation in Optical Parametric Chirped-Pulse Amplification
The pump-induced degradation of the temporal contrast of laser pulses amplified by optical parametric chirped-pulse amplification (OPCPA) is studied analytically. In OPCPA systems, the temporal fluctuations of the pump pulse are coupled to the spectrum of the chirped signal by the instantaneous parametric gain and lead to a reduction in the temporal contrast of the recompressed amplified signal. The intensity and shape of the induced temporal pedestal depend on the pump fluctuations and the parametric amplifier operating regime. General equations describing the contrast degradation are derived and applied to the case of sinusoidal pump-intensity modulation and pump amplified spontaneous emission. The reduction of the contrast in the amplified pulse is quantified analytically and via simulations for an OPCPA system.
- Research Organization:
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC52-92SF19460
- OSTI ID:
- 920689
- Report Number(s):
- DOE/Sf/19460-786; 2007-88; 1755; TRN: US200805%%122
- Journal Information:
- Journal of the Optical Society of America B, Vol. 24, Issue 12
- Country of Publication:
- United States
- Language:
- English
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