Method and apparatus for pulsed harmonic ultraviolet lasers

摘要

An apparatus for producing coherent, pulsed ultraviolet light with pulse durations that range between 1 ps and 1 μs includes one or more source lasers in the visible or near-infrared frequency range. The apparatus also includes one or more FC stages, at least one of the one or more FC stages including a nonlinear FC device and one or more optical elements. The optical elements include a reflector, a focusing element, a polarization-controlling optic, a wavelength separator, or a fiber optic component. The FC device includes a huntite-type aluminum double borate nonlinear optical material configured to produce FC light having a wavelength between 190 and 350 nm and a composition given by RAl3B4O12, where R comprises one or a plurality of elements {Sc, La, Y, Lu}. The nonlinear optical material is characterized by an optical transmission greater than 70% over the wavelength range of 190 to 350 nm.

主权项

1. An apparatus for producing coherent, pulsed, ultraviolet light, the apparatus comprising:
one or more source lasers configured to provide visible or near-infrared output radiation; and one or more frequency conversion stages, at least one of the one or more frequency conversion stages including a nonlinear critically phase-matched frequency conversion device and one or more optical elements including: a reflector, a focusing element, a polarization-controlling optic, a wavelength separator, or a fiber optic component; and wherein the nonlinear critically phase-matched frequency conversion device includes a huntite-type aluminum double borate nonlinear optical material producing frequency converted light having a wavelength between 190 and 350 nm and experiences a local peak intensity greater than 5 GW/cm2 during operation.