College of Science, National University of Defense Technology, Changsha 410073, China.
Opt Lett. 2009 Dec 15;34(24):3848-50. doi: 10.1364/OL.34.003848.
FM-to-AM conversion can cause many negative effects (e.g., reducing of margin against damage to the optics) on the performance of a third-harmonic conversion system. In this Letter, the FM-to-AM conversion effect in third-harmonic generation is investigated both at and away from the retracing point of Type II potassium dihydrogen phosphate crystal. Obtained results indicate that the FM-to-AM conversion can be suppressed effectively when the crystal works at the retracing point.
FM-AM 转换会对三次谐波转换系统的性能产生许多负面影响（例如，降低光学损伤的裕度）。在本信中，研究了在 II 型磷酸二氢钾晶体的回溯点处和远离回溯点处的三次谐波产生中的 FM-AM 转换效应。得到的结果表明，当晶体在回溯点工作时，可以有效地抑制 FM-AM 转换。
