4.5 Article

Noncollinear phase-matching geometries in ultra-broadband quasi-parametric amplification

Journal

CHINESE PHYSICS B
Volume 31, Issue 5, Pages -

Publisher

IOP Publishing Ltd
DOI: 10.1088/1674-1056/ac3a5b

Keywords

quasi-parametric amplification; noncollinear phase-matching geometry; nonlinear optics; ultrafast optics

Funding

  1. National Natural Science Foundation of China [51832009]
  2. Fundamental Research Funds for the Central Universities, China [2019YJS209]

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This paper investigates the ultra-broadband amplification and noncollinear phase-matching geometry in quasi-parametric chirped pulse amplification (QPCPA). A novel triple-wavelength phase-matching geometry is proposed that can support stable ultra-broadband amplification in QPCPA.
Optical parametric chirped pulse amplification (OPCPA) shows great potential in producing ultrashort high-intensity pulses because of its large gain bandwidth. Quasi-parametric chirped pulse amplification (QPCPA) may further extend the bandwidth. However, behavior of QPCPA at a limited pump intensity (e.g., <= 5 GW/cm(2) in a nanosecond pumped QPCPA) has not yet been investigated fully. We discuss detailedly the ultra-broadband amplification and the noncollinear phase-matching geometry in QPCPA, model and develop a novel noncollinear geometry in QPCPA, namely triple-wavelength phase-matching geometry, which provides two additional phase-matching points around the phase-matching point at the central wavelength. Our analysis demonstrates that the triple-wavelength phase-matching geometry can support stable, ultra-broadband amplification in QPCPA. The numerical simulation results show that ultrashort pulse with a pulse duration of 7.92 fs can be achieved in QPCPA when the pump intensity is limited to 5 GW/cm(2), calculated using the nonlinear coefficient of YCa4O(BO3)(3).

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