Endovascular Ultraviolet Laser-Facilitated Reversal of Vasospasm Induced by Subarachnoid Hemorrhage in Canines

Watson, Brant D.; Sadasivan, Chander; Hurst, Robert W.

doi:10.1007/978-3-030-04615-6_19

Cited by 1 publication

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“…In recent years, high-power UV lasers at 355 nm have been widely used in industrial applications and scientific fields such as laser printing, UV curing, laser micromachining (cutting, drilling and etching), optical data storage, medical treatment, and so on, due to their high photon energy, high resolution, good focusing performance, small spot size and small diffraction effect [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

High efficiency 355 nm laser by employing a flat-flat cavity with improved harmonic beam quality

et al. 2021

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A high efficiency 355 nm ultraviolet (UV) laser is obtained by intracavity frequency-tripling of a 1064 nm Nd:YVO 4 laser in a flat-flat cavity. The 5.6 W UV maximum average output power is obtained at the incident pump power of 29 W at 808 nm and the repetition rate of 50 kHz, corresponding to the pump-UV conversion efficiency of 19.3%. The corresponding pulse width is 14.2 ns, with the energy of a single pulse and corresponding peak power estimated to be 112 µJ and 7.89 kW, respectively. The frequency doubling and tripling lasers are obtained by employing type-I phase-matching LiB 3 O 5 (LBO) crystal with parallel surfaces and a type-II phase-matching LBO crystal with Brewster angle-cut uncoated surface, respectively. The beam quality of the 355 nm laser is measured to be M x 2 = 1.257 and M y 2 = 1.173, respectively. The reasons for improvement of harmonic beam quality are explained by simulating the laser field intensity distribution changes in two special directions during the nonlinear conversion process.

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Section: Introductionmentioning

confidence: 99%