期刊
OPTICS LETTERS
卷 46, 期 22, 页码 5743-5746出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.440145
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资金
- National Natural Science Foundation of China [61727820, 61905142, 61975120, 91850203]
OPCPA is susceptible to undesired spatiotemporal couplings caused by nonlinear phase shifts from frequency-dependent phase mismatch. These couplings result in pulse-front deformation, transversely varying pulse duration, and spectrally varying wavefront curvature, directly related to phase-mismatch dispersion terms. Numerical study shows that focused signal intensity significantly decreases with increasing signal bandwidth and pump depletion.
Optical parametric chirped-pulse amplification (OPCPA) is prone to undesired spatiotemporal couplings. This Letter studies a family ofOPCPAcouplings resulting fromthe non-linear phase shift induced by frequency-dependent phase mismatch. These OPCPA couplings manifest as pulse-front deformation, transversely varying pulse duration, and spectrally varying wavefront curvature, which are directly linked with the phase-mismatch dispersion terms. The numerical study in this Letter also reveals that the focused signal intensity severely degrades with increasing signal bandwidth and pumpdepletion. (C) 2021 Optical Society of America
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