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

Author Affiliations
Key Laboratory of Optical Fiber Sensing and Communication Networks, School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
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.

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