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We report on the continuous-wave and passively Q-switched operation of a compositionally “mixed” heavily doped 16.6 at.% Yb:(Y,Lu)3Al5O12 garnet crystal at cryogenic temperatures (100–200 K), pumped by a volume Bragg grating stabilized diode laser emitting at 969 nm. At 140 K, in the...
In this paper, we report a nonlinear optical parametric amplifier featuring high conversion efficiency, high temporal contrast and ultra-broadband spectrum simultaneously, based on the dual-crystal scheme. By removing the idler pulse between two crystals and optimizing the phase-matching...
Four-wave mixing (FWM) optical parametric amplification using uniform-width and flared-waveguide quantum dot semiconductor optical amplifiers (FW-QDSOAs) as a nonlinear interaction medium has been investigated in this report. The analysis has been performed based on numerical simulation of a set...
A direct comparison of the properties of electron beam generated by antiparallel circularly polarized Laguerre–Gaussian (CPLG) laser pulse and parallel CPLG laser pulse has been performed with three-dimensional particle-in-cell simulations. It is known that the longitudinal field of an...
Fabrication of a through hole in a polyimide film (PI) was demonstrated by holographic ultraviolet (UV) nanosecond laser processing with a computer-generated hologram displayed on a phase-only spatial light modulator (SLM). The UV laser was directly modulated into a Bessel beam by a diffractive...
An optical method for high-speed line-of-sight pressure measurements using infrared laser absorption spectroscopy is presented with detailed uncertainty analysis related to thermodynamic and compositional variation in combustion environments. The technique exploits simultaneous sub-microsecond...
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