Threshold of stimulated Brillouin scattering by use of a solar pumped laser

摘要

What is to our knowledge the first stimulated Brillouin scattering experiment using a high-power low-gain solar pumped laser is presented, A threshold reflectivity of 0.23% was reached when a peak power of 20.7 kW was used at 7.6 GHz. A cw solar pumped laser was Q-switched with an acousto-optic modulator, and the bandwidth was narrowed with an intracavity etalon. A high polarization ratio (>99.4%) was achieved by use of an intracavity configuration, Higher reflectivity values were limited because of the lack of availability of optical switches. (C) 2002 Optical Society of America. [References: 9]