Abstract
Photonic integrated circuits for wideband and multi-band optical communications will need waveguide crossings that operate at all the wavelengths required by the system. In this Letter, we use the modified gradient decedent method to optimize the dual-wavelength band (DWB) crossings on both single- and double-level platforms. On the single-level platform, the simulation results show insertion losses (ILs) less than 0.07 and 0.11 dB for a crossing working at a DWB of 1.5–1.6 and 1.95–2.05 µm. ILs are less than 0.1 and 0.2 dB for a crossing operating in the DWB of 1.5–1.6 and 2.2–2.3 µm. On the double-layer platform, the simulated results show IL less than 0.08 dB across the wavelength range of 1.25–2.25 µm. We experimentally demonstrate the DWB crossing operating at 1.5–1.6 and 2.2–2.3 µm to have IL less than 0.3 and 0.4 dB and crosstalk of ${-}{28}$ and ${-}{26}\;{\rm dB}$ in the two bands, respectively.
© 2021 Optical Society of America
Full Article | PDF ArticleMore Like This
Zejie Yu, Aosong Feng, Xiang Xi, and Xiankai Sun
Opt. Lett. 44(1) 77-80 (2019)
Dan Yi, Yaojing Zhang, and Hon Ki Tsang
Opt. Lett. 46(4) 876-879 (2021)
Hansi Ma, Te Du, Xinpeng Jiang, Zhaojian Zhang, Xin He, Huan Chen, Yang Yu, Zhenfu Zhang, Yunxin Han, Junbo Yang, Yuanxi Peng, and Liang Fang
Opt. Express 31(18) 29235-29244 (2023)