Chinese Optics Letters, 2021, 19 (7): 071903, Published Online: Apr. 20, 2021
Precise control of micro-rod resonator free spectral range via iterative laser annealing Download: 513次
Abstract
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 resonator quality-factor is only slightly affected by the iterative annealing procedure. Using the fabricated micro-rod resonators, 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.
Qin Wen, Wenwen Cui, Yong Geng, Heng Zhou, Kun Qiu. Precise control of micro-rod resonator free spectral range via iterative laser annealing[J]. Chinese Optics Letters, 2021, 19(7): 071903.