High-responsivity and high-bandwidth uni-traveling carrier photodetectors for ultra-high-speed transmission networks

Yimiao Chu; Han Ye; Yu Zheng; Shuai Wang; Liyan Geng; Qin Han

doi:10.1117/12.3048558

5 December 2024 High-responsivity and high-bandwidth uni-traveling carrier photodetectors for ultra-high-speed transmission networks

Yimiao Chu, Han Ye, Yu Zheng, Shuai Wang, Liyan Geng, Qin Han

Author Affiliations +

Proceedings Volume 13418, Fifteenth International Conference on Information Optics and Photonics (CIOP 2024); 134182E (2024) https://doi.org/10.1117/12.3048558
Event: 15th International Conference on Information Optics and Photonics (CIOP2024), 2024, Xi’an, China

Abstract

With the rise of cloud computing, big data, and mobile internet, there is an increasing demand in information society for higher communication bandwidth and speed. There is an urgent need to conduct research on the next generation of ultra-high-speed transmission networks, with high-speed photodetectors being key components. We designed and fabricated a high responsivity, high bandwidth, and high output power edge-coupled Uni-Traveling Carrier Photodetector (UTC-PD). This paper details the structural design, experimental fabrication, and test results of a 1550nm wavelength InP-based edge-coupled UTC-PD. To achieve high responsivity and bandwidth simultaneously, we optimized the thickness of the absorption and collection layers. The device was fabricated using metal organic chemical vapor deposition and contact lithography techniques. The test results show that at a wavelength of 1550nm, the UTC-PD achieves a photoresponse of 0.49A/W (without anti-reflection coating). We conducted high-frequency performance testing of the photodetector using a vector network analyzer. Photodetectors of the same size exhibited uniform bandwidth performance, with a maximum bandwidth reaching up to 34.1GHz. At an optical current of 2.85mA, the photodetector exhibits RF output powers of 247uW @ 1GHz and 26.8uW @ 91GHz, with a reduction of 8.96dB within the 90GHz frequency range. This high responsivity, high bandwidth, and high output power photodetector could offer promising chip options for upcoming ultra-high-speed optical transmission networks.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yimiao Chu, Han Ye, Yu Zheng, Shuai Wang, Liyan Geng, and Qin Han "High-responsivity and high-bandwidth uni-traveling carrier photodetectors for ultra-high-speed transmission networks", Proc. SPIE 13418, Fifteenth International Conference on Information Optics and Photonics (CIOP 2024), 134182E (5 December 2024); https://doi.org/10.1117/12.3048558

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KEYWORDS

Photodetectors

Dark current

Optical transmission

Resistance

Absorption

Fabrication

Optical communications

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