Affiliation:
1. University of Rochester
2. University of Rochester Laser Laboratory for Energetics
Abstract
Optical parametric chirped-pulse amplification (OPCPA) is an effective
way to generate ultrashort pulses that has been used extensively for a
variety of applications requiring high peak intensities. Precise
control and measurement of a system’s spectral and spatial phases are
required for Fourier-transform–limited pulse compression and
diffraction-limited focusing. Phase accumulated during optical
parametric amplification (OPA) can degrade the compressibility and
focusability of the pulse, reducing peak intensity. We used analytic
and numerical analysis of OPA to study the influence of crystal
parameters, the wavefront of the pump and signal, and their relative
optical alignment on the accumulated phase. We show that the
accumulated signal phase is largely independent of amplifier
saturation and, with significant local wavefront gradients in the
signal or pump beam, the quality of the compressed pulses can be
degraded. We use first-order expressions for the pump- and
signal-angle sensitivity to evaluate an OPCPA system consisting of a
highly deuterated potassium dihydrogen phosphate amplifier designed to
support bandwidth for 15 fs pulses centered at 920 nm.
Funder
National Nuclear Security
Administration
University of Rochester
New York State Energy Research and
Development Authority
The University of Rochester Laser
Laboratory for Energetics
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering
Cited by
1 articles.
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