Author Affiliations
Abstract
1 Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China
2 College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou 325035, China
3 College of Science and Technology, Ningbo University, Ningbo 315211, China
4 Laboratory of Infrared Materials and Devices, The Research Institute of Advanced Technologies, Ningbo University, Ningbo 315211, China
5 Department of Information Science and Electronics Engineering, Zhejiang University, Hangzhou 310027, China
A polarization-insensitive mode-order converting power splitter using a pixelated region is presented and investigated in this paper. As TE0 and TM0 modes are injected into the input port, they are converted into TE1 and TM1 modes, which evenly come out from the two output ports. The finite-difference time-domain method and direct-binary-search optimization algorithm are utilized to optimize structural parameters of the pixelated region to attain small insertion loss, low crosstalk, wide bandwidth, excellent power uniformity, polarization-insensitive property, and compact size. Experimental results reveal that the insertion loss, crosstalk, and power uniformity of the fabricated device at 1550 nm are 0.57, -19.67, and 0.094 dB in the case of TE polarization, while in the TM polarization, the relevant insertion loss, crosstalk, and power uniformity are 0.57, -19.40, and 0.11 dB. Within a wavelength range from 1520 to 1600 nm, for the fabricated device working at TE polarization, the insertion loss, crosstalk, and power uniformity are lower than 1.39, -17.64, and 0.14 dB. In the case of TM polarization, we achieved an insertion loss, crosstalk, and power uniformity less than 1.23, -17.62, and 0.14 dB.
integrated optics optical waveguide polarization-insensitive property mode-order converting power splitter Chinese Optics Letters
2024, 22(3): 031301
