SYSTEM AND METHOD FOR GENERATING EYE-SAFE HIGH INTENSITY OPTICAL PULSES WITH TWO BACKWARD- SHIFTING RAMAN CELLS

摘要

A system and method for converting a pulsed laser beam at a first wavelength to a pulsed beam at a second, Stokes, wavelength. The system includes two Raman cells filled with the same Raman-active gas. The second cell receives a backward-propagating Stokes pulse beam from the first Raman cell, with the backward-propagating Stokes pulsed beam entering the second Raman cell in a direction opposite to the direction of travel of the incoming laser pulses at the first wavelength. The second Raman cell generates a high intensity output pulsed beam at the second, Stokes, wavelength. The system can produce a high intensity eye-safe pulsed beam.