Generation of high energy mid-infrared continuum laser pulses

摘要

In one aspect, a method is provided for generating supercontinuum laser pulses within a continuous mid-infrared spectral range in a chalcogenide material. This method includes focusing an input laser beam of femtosecond pulses with a pulse energy higher than 10 microjoule along an optical path of the input laser beam; placing a chalcogenide material at a selected location along the optical path of the laser beam so that the laser intensity at the chalcogenide material is sufficiently high to cause nonlinear optical absorption that causes conversion of input optical energy into supercontinuum laser pulses of a pulse energy at or above a microjoule level at optical wavelengths within a broad continuous mid-infrared spectral range without damaging the chalcogenide material; and simultaneously moving the chalcogenide material laterally relative to the input laser beam to avoid damage to the chalcogenide material.