A new measurement of stimulated Brillouin scattering phase conjugation fidelity for high pump energies

作者：Wang Y L; Lu Z W; HE W M; Zheng Z X; Zhao Y H

来源：Laser and Particle Beams, 2009, 27(2): 297-302.

DOI：10.1017/S026303460900038X

• Beam combination
• Phase conjugation
• Stimulated Brillouin scattering

In order to measure the phase conjugation-fidelity of stimulated Brillouin scattering with high pump energy more accurately and conveniently, a new measurement is proposed. According to the definition of the fidelity with optical field correlated integral, the method of recording the far-field by array camera is analyzed theoretically. By the method, an experiment for high energy stimulated Brillouin scattering is arranged, and maximum energy of 3.42 J is achieved in a single-cell stimulated Brillouin scattering generator. For small pump pulse, the fidelity maintains a high value of more than 0.9. However, the reflectivity fluctuation is significant when the pump energy is larger than 1.5 J. As a result, the fidelity decreases gradually to 0.5 at the pump energy of 3.42 J. The reflectivity shows the same character of great fluctuation as the fidelity at high pump energy.

• 出版日期2009-6
• 单位哈尔滨工业大学