Samblowski Aiko, Vollmer Christina E, Baune Christoph, Fiurášek Jaromír, Schnabel Roman
Opt Lett. 2014 May 15;39(10):2979-81. doi: 10.1364/OL.39.002979.
We report on the experimental frequency conversion of a dim, coherent continuous-wave light field from 1550 to 532 nm with an external photon-number conversion efficiency of (84.4±1.5)%. In contrast to previous works, our conversion efficiency value incorporates all losses before the photoelectric detection, including those introduced by frequency filters. We used sum-frequency generation, which was realized in a standing-wave cavity built around a periodically poled type I potassium titanyl phosphate (PPKTP) crystal, pumped by an intense field at 810 nm. Our result is in full agreement with a numerical model. For optimized cavity coupler reflectivities, it predicts a conversion efficiency of up to 93% using the same PPKTP crystal.
我们报告了将微弱的相干连续波光场从1550纳米实验性地频率转换为532纳米，外部光子数转换效率为(84.4±1.5)%。与之前的工作不同，我们的转换效率值包含了光电探测之前的所有损耗，包括频率滤波器引入的损耗。我们使用了和频产生，这是在围绕周期性极化I型钛酸钡钾（PPKTP）晶体构建的驻波腔中实现的，由810纳米的强场泵浦。我们的结果与数值模型完全一致。对于优化的腔耦合器反射率，使用相同的PPKTP晶体，该模型预测转换效率高达93%。
