Brillouin lasing in coupled silica toroid microcavities
Brillouin lasing in coupled silica toroid microcavities
复制标题
DOI：
10.1063/1.5021062
复制
发表时间：
2017-02
期刊：
影响因子：
--
通讯作者：
Yoshihiro Honda;W. Yoshiki;T. Tetsumoto;Shun Fujii;K. Furusawa;N. Sekine;T. Tanabe
中科院分区：
文献类型：
--
作者：
Yoshihiro Honda;W. Yoshiki;T. Tetsumoto;Shun Fujii;K. Furusawa;N. Sekine;T. Tanabe
受激布里渊散射（SBS）是一种众所周知的非线性过程，其中两个光波通过声波相互作用。声波是通过电致伸缩过程产生的。受激布里渊散射近年来受到广泛关注，因为它可以用于低噪声激光器、微波合成器、慢光和光存储。回音壁模式（WGM）微腔具有高Q值和小模体积，使我们能够产生低阈值功率的SBS。在这项研究中，有必要通过使用mm级腔体将自由光谱范围（FSR）与布里渊频移（数十GHz）相匹配，或者制备分离布里渊频移的高阶横向WGM以产生SBS [1-3]。这两种方法都很难制备SBS微腔，因为我们需要精确控制微腔的尺寸。耦合腔使得模式分离能够自由调谐，这使得我们无需精确控制腔的尺寸。耦合硅环形微腔已经被用于放大光机械振荡[4]，但这种方法还没有扩展到布里渊激光。在这项工作中，我们首次在实验上证明了耦合石英环形微腔中的SBS。
Stimulated Brillouin scattering (SBS) is a well-known nonlinear process in which two optical waves interact via an acoustic wave. The acoustic wave is generated via the electrostriction process. SBS has recently received a lot of attention because it can be employed for low-noise lasers, microwave synthesizers, slowing light and light storage. Whispering-gallery mode (WGM) microcavities with high Q factors and small mode volumes enable us to generate SBS with low threshold power. In this research, it is necessary to match the free spectral range (FSR) to the Brillouin frequency shift (tens of GHz) by using mm-scale cavities or to prepare high-order transverse WGMs that separate the Brillouin frequency shift to generate SBS [1-3]. With both approaches, it is very difficult to fabricate microcavities for SBS because we need to control the size of the microcavities precisely. The coupled cavities enable mode separation to be freely tuned, and this allows us to avoid the need for precise control of the cavity size. Coupled silica toroid microcavities have already been used to amplify optomechanical oscillation [4], but this approach has yet to be expanded to Brillouin lasing. In this work, we demonstrated SBS in coupled silica toroid microcavities experimentally for the first time.