Volume 16 Issue 5
Sep.  2023
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XIE Feng, ZHU Shuo-long, ZHANG Zhen-rong. Design of an optical power splitter with adjustable split ratio[J]. Chinese Optics, 2023, 16(5): 1121-1128. doi: 10.37188/CO.2023-0038
Citation: XIE Feng, ZHU Shuo-long, ZHANG Zhen-rong. Design of an optical power splitter with adjustable split ratio[J]. Chinese Optics, 2023, 16(5): 1121-1128. doi: 10.37188/CO.2023-0038

Design of an optical power splitter with adjustable split ratio

doi: 10.37188/CO.2023-0038
Funds:  Supported by National Natural Science Foundation of China (No. 12272407, No. 62275269, No. 62275271); National Key R & D Program of China (No. 2022YFF0706005); China Guangdong Guangxi Joint Science Key Foundation (No. 2021GXNSFDA076001); KR & DP of Guangxi (No. AB22080048)
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  • Corresponding author: zzr76@gxu.edu.cn
  • Received Date: 02 Mar 2023
  • Rev Recd Date: 27 Mar 2023
  • Accepted Date: 03 Apr 2023
  • Available Online: 13 Apr 2023
  • Traditional analytical theory design scheme faces problems, such as high computational complexity, limited analytical solution, and high time-consumption. To cambat these issues, based on the design of traditional optical devices, a scheme for designing an optical power splitter with adjustable split ratio according to the reverse design method is proposed. In a compact region of 1.92 μm×1.92 μm, Ge2Sb2Se4Te1(GSST) is introduced to change the refractive index distribution of the device. The direct binary search algorithm is utilized to search the optimal state distribution of GSST in crystalline and amorphous states. A T-shaped optical power splitter with adjustable split ratio is designed and implemented for the same device structure. The initial structure, split ratio, phase change material region state distribution, manufacturing tolerance, and light field distribution of the device are simulated and analyzed. The results show the minimum relative errors of the designed optical power splitters with three splitting ratios of 1∶1, 1.5∶1 and 2∶1 between wavelengths 1530 nm and 1560 nm are 0.004%, 0.14% and 0.22%, respectively. The maximum fluctuations of the transmission curve in the manufacturing tolerance range are 0.95 dB, 1.21 dB and 1.18 dB, respectively. The splitter has a compact structure and great potential for applications in optical communication and information processing.


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