Wideband Dispersion Flattening for Whispering Gallery Mode Microresonators Fabricated by Laser Micromachining

被引：4
作者：
Zhou, Cheng [1 ]
Du, Jiangbing [1 ]
He, Zuyuan [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Shanghai Inst Adv Commun & Data Sci, Key Lab, Shanghai 200240, Peoples R China
来源：
IEEE PHOTONICS JOURNAL | 2017年 / 9卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Whispering gallery mode; microresonators; dispersion; OPTICAL MICROCAVITIES; FREQUENCY COMBS; RESONATOR; CHIP; SPECTROSCOPY;
D O I：
10.1109/JPHOT.2017.2773120
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Dispersion engineering of microresonators is very important for applications, such as optical comb generation which desires wideband flat and small dispersion. In this paper, dispersion investigation has been carried out for whispering gallery mode (WGM) microresonators fabricated by laser micromachining. The dispersion properties of WGM microresonators fabricated by CO2 and femtosecond lasers have been comprehensively studied by finite element method for different geometries. Significantly flattened dispersion curves have been obtained for both microresonators fabricated by CO2 laser and femtosecond laser with optimized geometries. The belt-like resonator fabricated by femtosecond laser has better flattened small dispersion which is only between 0 and 4 ps/(nm. km) within the wavelength range from 1300 to 1800 nm, comparable to that of a zero dispersion flattened fiber. The results are of great significance for guiding the WGM microresonator fabrication for optical comb generation applications.
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页数：8
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