Laser & Optoelectronics Progress, Volume. 60, Issue 17, 1723001(2023)
Polarization-Independent Optical Power Splitter with a Designable Splitting Ratio
Based on a sandwich structure and adiabatic coupler, a polarization-independent optical power splitter with a designable splitting ratio is designed to achieve power distribution for the 1550 nm wavelength optical signal with a designable splitting ratio. By adjusting the refractive index of the sandwiched middle layer material SiNx, the splitting ratios of the transverse electric (TE) and transverse magnetic (TM) polarization modes are made equal at the same wavelength, and a polarization-independence function is realized. Next, the designable splitting ratio function is obtained by varying the asymmetry of the waveguide gaps in the adiabatic coupler. The three-dimensional finite-difference time-domain method is used for modeling and simulations. The results reveal that the coupling length of the proposed device is only 7 μm. The device can achieve designable splitting ratios ranging from 0.50 to 0.95 and simultaneously support the TE and TM polarization modes. The insertion loss value is lower than 0.31 dB. A 100 nm bandwidth can be obtained when the tolerance of the splitting ratio is within ±0.01. The proposed approach is potentially applicable to future photonic integrated circuit systems.
Get Citation
Copy Citation Text
Jingli Wang, Haiguang Liu, Yueteng Zhang, Yuchen Song, Hanxiao Shen, Heming Chen, Kai Zhong. Polarization-Independent Optical Power Splitter with a Designable Splitting Ratio[J]. Laser & Optoelectronics Progress, 2023, 60(17): 1723001
Category: Optical Devices
Received: Jul. 3, 2022
Accepted: Sep. 13, 2022
Published Online: Sep. 13, 2023
The Author Email: Wang Jingli (jlwang@njupt.edu.cn)