Precise control of micro-rod resonator free spectral range via iterative laser annealing

• 作者: Qin Wen Wenwen Cui Yong Geng Heng Zhou Kun Qiu
• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: Nonlinear Optics
• 页码范围: 77-81
• 页数: 5页
• 语种: 英文
• DOI: 10.3788/COL202119.071903

摘要

We demonstrate a novel method to control the free spectral range[FSR]of silica micro-rod resonators precisely.This method is accomplished by iteratively applying laser annealing on the already-fabricated micro-rod resonators.Fine and repeatable increasing of resonator FSR is demonstrated,and the best resolution is smaller than 5 MHz,while the res-onator quality-factor is only slightly affected by the iterative annealing procedure.Using the fabricated micro-rod reso-nators,single dissipative Kerr soliton microcombs are generated,and soliton repetition frequencies are tuned precisely by the iterative annealing process.The demonstrated method can be used for dual-comb spectroscopy and coherent optical communications.