Experimental demonstration of multimode microresonator sensing by machine learning

Noise-squeezed forward Brillouin lasers in multimode fiber microresonators

Stimulated Brillouin scattering (SBS) in low-power and compact microresonators has created a new field in cavity nonlinear photonics due to the marriage between acoustic and optical signal processing. Considering the fundamental differences between backward SBS and forward SBS processes, it is challenging to observe the coexistence of both processes in the same microresonator, as well as the photon noise suppression for the forward stimulated Brillouin laser (FSBL). In this paper, we demonstrate the first 20-dB-noise-squeezed FSBL generation excited by the coexisting backward SBL (BSBL) in an …

Exploiting Ultralow Loss Multimode Waveguides for Broadband Frequency Combs

Low propagation loss in high confinement waveguides is critical for chip-based nonlinear photonics applications. Sophisticated fabrication processes which yield sub-nm roughness are generally needed to reduce scattering points at the waveguide interfaces in order to achieve ultralow propagation loss. Here, we show ultralow propagation loss by shaping the mode using a highly multimode structure to reduce its overlap with the waveguide interfaces, thus relaxing the fabrication processing requirements. Microresonators with intrinsic quality factors (Q) of 31.8 $\pm$ 4.4 million are experimentally…

Demonstration of hybrid high-Q hexagonal boron nitride microresonators

Hexagonal boron nitride (hBN) is a wide bandgap van der Waals material that is emerging as a powerful platform for quantum optics and nanophotonics. In this work, we demonstrate whispering gallery mode silica microresonators hybridized with thin layers of epitaxially grown hBN that exhibit high optical quality factor $> 7 \times 10^5$. Measurements of the effect of hBN thickness on optical $Q$ and comparison with a theoretical model allows the linear optical absorption coefficient of the hBN films to be estimated. These high-$Q$ devices will be useful for applications in quantum and nonlinear …

4H-碳化硅-绝缘体平台上集成微加热器及其应用

Integrated microheater on the 4H-silicon-carbide-on-insulator platform and its applications

本研究在4H-SiCOI平台上集成微加热器实现可调谐性，实现11.7 pm/mW调谐速率和快速热光扫描，用于确定性单孤子态访问及梳线滤波，为芯片级应用铺路。

耗散克尔多孤子的全光方位捕获用于相对噪声抑制

All-Optical Azimuthal Trapping of Dissipative Kerr Multi-Solitons for Relative Noise Suppression

本文提出利用克尔诱导同步的全光捕获技术将多DKS状态方位钉扎到公共参考场，使重复频率噪声与孤子数量无关，从而让多DKS状态在噪声性能上可与单DKS状态相比，提升其计量应用价值。

太赫兹频率下平面多模周期滤波器的演示

Demonstration of a planar multimodal periodic filter at THz frequencies

本文提出一种基于共面带状线和有限地面共面波导的平面多模周期滤波器，用于太赫兹频率操作，通过灵活设计和主动控制实现滤波特性。