Optical parametric amplification pumped by a phase-aberrated beam.
In this paper we theoretically study the spatial characteristics of optical parametric amplification (OPA) or chirped pulse OPA (OPCPA) pumped with a phase-aberrated beam. Due to the fact that pump-to-signal phase transfer caused by walk-off effect is highly gain-dependent, in a high gain OPA system the signal beam-quality will be significantly degraded even for a weak walk-off, accompanied with beam tilting and converging or diverging. It is demonstrated that an OPA configuration with walkoff-compensated crystal pair is capable of reducing the phase transfer and hence ensuring signal beam-quality, which may be of importance for designing high-energy OPCPA systems.
State Key Laboratory for Advanced Photonic Materials and Devices, Department of Optical Science and Engineering, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China.
Xiaohong
X
Wei
Liejia
L
Qian
Peng
P
Yuan
Heyuan
H
Zhu
Dianyuan
D
Fan
D000669:Amplifiers, Electronic; D016477:Artifacts; D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D008027:Light; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*; D012542:Scattering, Radiation