Acta Optica Sinica, Volume. 41, Issue 17, 1723001(2021)
Reconfigurable Mode Multiplexer Waveguide Switch Based on Phase Change Material
Based on the optical phase change material Ge2Sb2Se4Te1 and the optical waveguide structure, a reconfigurable 2×4 mode multiplexing optical switch device is proposed to improve the optical communication capacity. The device is composed of two 1×2 multiplexing switch units with a slanted waveguide structure and a 2×2 multiplexing switch unit with symmetrical structure. First, the mode transmission characteristics in the waveguide are analyzed by the mode coupling theory. Second, the optical switching device is modeled by the three-dimensional finite difference time domain method. Finally, the model is used for experimental research. The research results show that when the working wavelength is 1550 nm, the insertion loss of the 1×2 switch unit when the phase change material is in the crystalline state and the amorphous state is as low as 0.60 dB and 0.06 dB, and the extinction ratio is as high as 19.55 dB and 27.58 dB, respectively. The minimum insertion loss of the 2×4 mode multiplex switch in the entire C-band (1530--1565 nm) is 0.23 dB, and the maximum extinction ratio is 19.12 dB.
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Yuanshuai Lü, Chenggen Wang, Wei Yuan, Guiju Zhang, Kaiyue Qi. Reconfigurable Mode Multiplexer Waveguide Switch Based on Phase Change Material[J]. Acta Optica Sinica, 2021, 41(17): 1723001
Category: Optical Devices
Received: Feb. 22, 2021
Accepted: Mar. 23, 2021
Published Online: Sep. 3, 2021
The Author Email: Zhang Guiju (gjzhang@suda.edu.cn), Qi Kaiyue (tommy?qi@sjtu.edu.cn)