Aniolek K W, Schmitt R L, Kulp T J, Richman B A, Bisson S E, Powers P E
Opt Lett. 2000 Apr 15;25(8):557-9. doi: 10.1364/ol.25.000557.
For what is believed to be the first time, a single-longitudinal-mode passively Q-switched Nd:YAG microlaser is used to pump a narrow-bandwidth periodically poled lithium niobate (PPLN) optical parametric generator-optical parametric amplifier (OPG-OPA). Before amplification in the OPA, the output of the OPG stage was spectrally filtered with an air-spaced etalon, resulting in spectroscopically useful radiation (bandwidth, ~0.05 cm(-1) FWHM) that was tunable in 15-cm(-1) segments anywhere in the signal range 6820-6220 cm(-1) and the idler range 2580-3180 cm(-1). The ability to pump an OPG-OPA with compact, high-repetition-rate, intrinsically narrow-bandwidth microlasers is made possible by the high gain of PPLN. The result is a tunable light source that is well suited for use in portable spectroscopic gas sensors.
据信这是首次使用单纵模被动调Q Nd:YAG微激光器泵浦窄带宽周期性极化铌酸锂（PPLN）光学参量发生器 - 光学参量放大器（OPG - OPA）。在OPA中进行放大之前，OPG阶段的输出通过空气间隔标准具进行光谱滤波，产生了光谱学上有用的辐射（带宽，~0.05 cm⁻¹半高宽），该辐射在信号范围6820 - 6220 cm⁻¹和闲频范围2580 - 3180 cm⁻¹内的任何位置都可在15 cm⁻¹的波段内调谐。PPLN的高增益使得用紧凑、高重复率、本质上窄带宽的微激光器泵浦OPG - OPA成为可能。结果是得到了一种非常适合用于便携式光谱气体传感器的可调谐光源。
