Stimulated generation of deterministic platicon frequency microcombs  

作　　者：HAO LIU SHU-WEI HUANG WENTING WANG JINGHUI YANG MINGBIN YU DIM-LEE KWONG PIERRE COLMAN CHEE WEI WONG 

机构地区：[1]Fang Lu Mesoscopic Optics and Quantum Electronics Laboratory,University of California Los Angeles,Los Angeles,California 90095,USA [2]Department of Electrical,Computer,and Energy Engineering,University of Colorado Boulder,Boulder,Colorado 80309,USA [3]Institute of Microelectronics,Singapore,Singapore [4]Universitéde Bourgogne Franche-Comté,ICB,UMR CNRS 6303,Dijon,France

出　　处：《Photonics Research》2022年第8期1877-1885,共9页光子学研究（英文版）

基　　金：National Science Foundation(1741707,1810506,1824568);Office of Naval Research(N00014-16-1-2094);Air Force Office of Scientific Research(FA9550-15-1-0081)。

摘　　要：Dissipative Kerr soliton generation in chip-scale nonlinear resonators has recently observed remarkable advances,spanning from massively parallel communications, to self-referenced oscillators, and to dual-comb spectroscopy.Often working in the anomalous dispersion regime, unique driving protocols and dispersion in these nonlinear resonators have been examined to achieve the soliton and soliton-like temporal pulse shapes and coherent frequency comb generation. The normal dispersion regime provides a complementary approach to bridge the nonlinear dynamical studies, including the possibility of square pulse formation with flattop plateaus, or platicons.Here we report observations of square pulse formation in chip-scale frequency combs through stimulated pumping at one free spectral range and in silicon nitride rings with +55 fs~2∕mm normal group velocity dispersion.Tuning of the platicon frequency comb via a varied sideband modulation frequency is examined in both spectral and temporal measurements. Determined by second-harmonic autocorrelation and cross correlation, we observe bright square platicon pulse of 17 ps pulse width on a 19 GHz flat frequency comb. With auxiliary-laser-assisted thermal stabilization, we surpass the thermal bistable dragging and extend the mode-locking access to narrower 2 ps platicon pulse states, supported by nonlinear dynamical modeling and boundary limit discussions.

关 键 词：PUMPING SOLITON DISPERSION 

分 类 号：TN751.2[电子电信—电路与系统] TN40