Ultraviolet fiber laser system

摘要

Laser master oscillator—power amplifier system for generating high pulse energy, high average power laser pulses in the ultraviolet 191.25-201.25 nm and 243-246.25 nm spectral ranges, and in the visible 450-537.5 nm spectral range with controllable pulse duration and pulse repetition rate employ a master oscillator seed laser operating in the infra-red spectral range, and a single series connected chain of hybrid fiber—bulk crystalline amplifiers coupled to a non-linear frequency conversion unit to convert the laser pulses to the ultraviolet and visible spectral ranges.

主权项

1. A laser system for generating laser emissions in the ultraviolet or visible spectral range comprising:
a master oscillator laser providing laser emissions on a single wavelength in one of the ranges 972-985 nm, 1530-1610 nm or 1800-2150 nm; a fiber laser amplifier having a spectral gain band that encompasses the master oscillator wavelength for amplifying the laser emissions, the fiber laser amplifier comprising a single series coupled chain of a fiber laser pre-amplifier system, a pumped fiber laser power amplifier system, and a bulk crystalline laser amplifier; the bulk crystalline laser amplifier having a spectral gain band that encompasses the wavelength of the master oscillator laser emissions for amplifying the laser emissions from the fiber laser power amplifier system and for providing a further amplified output at said wavelength; and a non-linear frequency conversion unit for converting said further amplified wavelength from the bulk amplifier to a wavelength in the ultraviolet or visible spectral range.