Patent ID: 7738515
Filing Date: 2010-06-15
Classification: G02F,H01S,Y10S

Abstract:
1. Laser apparatus comprising: a laser-resonator arranged to deliver fundamental-wavelength optical pulses having a pulse-duration, the fundamental-wavelength optical pulses being temporally equispaced by a pulse-repetition period τ and delivered at a pulse-repetition frequency (PRF) equal to 1/τ; and an optical delay loop including one or more optically nonlinear crystals and arranged to receive the fundamental-wavelength optical pulses, the optical delay loop being configured and arranged such that each fundamental-wavelength pulse is converted within the optical delay loop into a harmonic-wavelength pulse and further arranged to convert each of the harmonic-wavelength into a plurality of replicas thereof, with the replicas of each harmonic-wavelength pulse being temporally spaced apart by about τ/N where N is an integer equal to or greater than 2.