Patent ID: 8837538
Filing Date: 2014-09-16
Classification: G02F,H01S

Abstract:
1. A laser system comprising: a pump laser configured to generate a pump beam having a pump wavelength and a pulse repetition frequency (PRF); a resonant cavity positioned to receive a first portion of the pump beam; a non-linear crystal positioned within the resonant cavity such that the non-linear crystal and resonant cavity have a band of lasing wavelengths including wavelengths other than the pump wavelength, the non-linear crystal operable to output a signal beam in response to the first portion of the pump beam; a seed laser positioned to emit a seed signal into the resonant cavity, the seed signal having a seed wavelength and the seed wavelength being within the band of lasing wavelengths; a seed laser controller electrically coupled to the seed laser and programmed to modulate the seed wavelength at the PRF of the pump laser; and a sum frequency generator (SFG) positioned to receive a second portion of the pump beam and a portion of the signal beam, the SFG operable to output an output beam in response to the second portion of the pump beam and the portion of the signal beam an SFG actuator controller electrically coupled to an SFG actuator the SFG actuator controller programmed to modulate the output beam by driving the SFG actuator; wherein the output beam is an ultraviolet (UV) beam with a wavelength that is modulated in a band from about 0.5 to about 4 nanometers.