Asano M, Komori S, Ikuta R, Imoto N, Özdemir Ş K, Yamamoto T
Opt Lett. 2016 Dec 15;41(24):5793-5796. doi: 10.1364/OL.41.005793.
We report the first observation of nonlinear harmonic generation and sum frequency generation (SFG) coupled with stimulated Raman scattering (SRS) via the second-order (χ) and the third-order (χ) nonlinearities in a silica microbottle resonator. The visible light emission due to third-harmonic generation (THG) was observed in both the output of a tapered fiber and the optical microscope images, which can be used to identify the axial mode profiles. SFG enabled by three- and four-wave mixing processes between the pump light and the light generated via SRS was also observed. Second-harmonic generation (SHG) and the SFG are enabled by χ induced in silica by surface effects and multipole excitations.
我们报告了在二氧化硅微瓶谐振器中首次观察到通过二阶（χ）和三阶（χ）非线性效应，非线性谐波产生和和频产生（SFG）与受激拉曼散射（SRS）耦合的现象。在锥形光纤输出和光学显微镜图像中均观察到了由三次谐波产生（THG）引起的可见光发射，其可用于识别轴向模式轮廓。还观察到了泵浦光与通过SRS产生的光之间的三波和四波混频过程所实现的SFG。二次谐波产生（SHG）和SFG是由表面效应和多极激发在二氧化硅中诱导的χ实现的。
