Measurement of the threshold of nonfocusing-pumped stimulated Brillouin scattering based on the spatial characteristic of the reflected pulse

We present a method for measuring the threshold of stimulated Brillouin scattering (SBS) when a large-aperture laser pulse with ultra-Gaussian shape is used as the pump source. By using an optical aperture to filter out part of the backward scattered light, the measured energy efficiency will be ...

Source: Applied Optics - May 21, 2019 Category: Physics Authors: Xuehua Zhu Source Type: research