EFFICIENT, TUNABLE OPTICAL EMISSION FROM LiNbO3 WITHOUT A RESONATOR
EFFICIENT, TUNABLE OPTICAL EMISSION FROM LiNbO3 WITHOUT A RESONATOR
复制标题
DOI：
10.1063/1.1652910
复制
发表时间：
1969-08
影响因子：
4
通讯作者：
J. Yarborough;S. Sussman;H. E. Purhoff;R. Pantell;B. Johnson
中科院分区：
文献类型：
--
作者：
J. Yarborough;S. Sussman;H. E. Purhoff;R. Pantell;B. Johnson
我们报告的第一个观察到的可调受激光发射从非线性晶体不使用外部谐振器，并与大于50%的转换的泵浦光束的可调频率。LiNbO 3晶体的相对面被抛光成平坦且平行，以提供晶体内信号辐射（斯托克斯）的多次反射。A1对称性248-cm−1极化激元模式用Q开关红宝石激光器激发，信号频率通过改变激光束相对于晶体表面法线的入射角来调谐。在室温下工作;在大部分调谐范围内没有观察到晶体损坏;并且在Q开关脉冲的前几纳秒内发生激光耗尽。斯托克斯频率和激光频率之间的差在42到200 cm-1之间变化，相应的闲频波长在238到50 μ之间变化。
We report the first observation of tunable stimulated optical emission from a nonlinear crystal without the use of an external resonator, and with greater than 50% conversion of the pump beam to the tunable frequency. Opposite faces of a LiNbO3 crystal were polished flat and parallel to provide for multiple reflections of the signal radiation (Stokes) inside the crystal. The A1 symmetry 248‐cm−1 polariton mode was excited with a Q‐switched ruby laser, and the signal frequency was tuned by varying the angle of incidence of the laser beam relative to the normal to the crystal surface. Operation was at room temperature; no crystal damage was observed over most of the tuning range; and laser depletion occurred within the first few nanoseconds of the Q‐switched pulse. The difference between the Stokes frequency and laser frequency was varied from 42 to 200 cm−1, and the corresponding idler wavelength was varied from 238 to 50 μ.