Frigenti Gabriele, Farnesi Daniele, Nunzi Conti Gualtiero, Huguet Silvia Soria
Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi", Compendio del Viminale, Piazza del Viminale 1, 00184 Roma, Italy.
CNR-IFAC, Istituto di Fisica Applicata "Nello Carrara", Consiglio Nazionale delle Ricerche, via Madonna del Piano 10, I50019 Sesto Fiorentino (FI), Italy.
Micromachines (Basel). 2020 Mar 13;11(3):303. doi: 10.3390/mi11030303.
Nonlinear frequency generation requires high intensity density which is usually achieved with pulsed laser sources, anomalous dispersion, high nonlinear coefficients or long interaction lengths. Whispering gallery mode microresonators (WGMRs) are photonic devices that enhance nonlinear interactions and can be exploited for continuous wave (CW) nonlinear frequency conversion, due to their capability of confine light for long time periods in a very small volume, even though in the normal dispersion regime. All signals must be resonant with the cavity. Here, we present a review of nonlinear optical processes in glass microspherical cavities, hollow and solid.
非线性频率产生需要高强度密度，这通常通过脉冲激光源、反常色散、高非线性系数或长相互作用长度来实现。回音壁模式微谐振器（WGMRs）是一种光子器件，由于其能够在非常小的体积内长时间限制光，即使在正常色散 regime 中，也可以增强非线性相互作用，并可用于连续波（CW）非线性频率转换。所有信号都必须与腔谐振。在这里，我们对玻璃微球腔（空心和实心）中的非线性光学过程进行综述。
