A broadband athermal waveguide with low anomalous dispersion

Jianbin Ma; Guangzhen Luo; Pengfei Wang; Pengfei Ma; Ruiting Wang; Xuliang Zhou; Jiaoqing Pan; Yejin Zhang

doi:10.1117/12.2602582

9 October 2021 A broadband athermal waveguide with low anomalous dispersion

Jianbin Ma, Guangzhen Luo, Pengfei Wang, Pengfei Ma, Ruiting Wang, Xuliang Zhou, Jiaoqing Pan, Yejin Zhang

Proceedings Volume 11895, Optical Design and Testing XI; 118951A (2021) https://doi.org/10.1117/12.2602582
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Conference Poster

Abstract

We propose and numerically investigate a double-cladded athermal waveguide structure aiming at broadband low anomalous dispersion operation. Single-crystal aluminum nitride (AlN) is the core of the waveguide, cladding with silicon oxide (SiO2) and titanium dioxide (TiO2). TiO2 with a negative thermo-optic coefficient (TOC) is used to realize material thermal compensation for AlN. By optimizing the waveguide structure parameters, it shows a near-zero broadband effective TOC, ±4×10-6 /K over a 1770-nm bandwidth from 1830 to 3600 nm. Besides, it also has low anomalous dispersion, from -20 to 20 ps/nm/km in the same wavelength range. Different with the conventional strip waveguide, the waveguide is a double cladded structure, which is easy to fabricate in practice. Furthermore, this structure will not damage the single crystal state of aluminum nitride, maintaining its original excellent optical properties.

Citation Download Citation

Jianbin Ma, Guangzhen Luo, Pengfei Wang, Pengfei Ma, Ruiting Wang, Xuliang Zhou, Jiaoqing Pan, and Yejin Zhang "A broadband athermal waveguide with low anomalous dispersion", Proc. SPIE 11895, Optical Design and Testing XI, 118951A (9 October 2021); https://doi.org/10.1117/12.2602582

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