Cavanna Andrea, Just Felix, Sharapova Polina R, Taheri Michael, Leuchs Gerd, Chekhova Maria V
Opt Lett. 2016 Feb 1;41(3):646-9. doi: 10.1364/OL.41.000646.
We suggest a novel optical parametric generator (OPG) in which one of the downconverted beams is spontaneously generated along the Poynting vector of the pump beam. In this configuration, the generation takes advantage of the walk-off of the extraordinary pump, rather than being degraded by it. As a result, the generated signal and idler beams are bright due to a high conversion efficiency, spatially nearly single mode due to the preferred direction of the Poynting vector, tunable over a wide range of wavelengths and broadband. The two beams are also correlated in frequency and in the photon number per pulse. Furthermore, due to their thermal statistics, these beams can be used as a pump to efficiently generate other nonlinear processes.
我们提出了一种新型光学参量发生器（OPG），其中一个下转换光束沿泵浦光束的坡印廷矢量自发产生。在这种配置中，该产生过程利用了异常泵浦的离散，而不是受其影响而性能下降。结果，由于高转换效率，所产生的信号光束和闲频光束很亮；由于坡印廷矢量的优先方向，在空间上几乎是单模的；在很宽的波长范围内可调谐且具有宽带特性。这两束光在频率和每个脉冲的光子数上也具有相关性。此外，由于它们的热统计特性，这些光束可用作泵浦光以有效地产生其他非线性过程。
