Waveguide-coupled germanium lateral uni-traveling-carrier photodetector for coherent applications at 130 Gbaud and beyond

Jianping Wang; Takasi Simoyama; Akira Oka; Mario Alberto Serrano-Núñez; Yoshihiko Yoshida; Kiyomasa Doi; Ayahito Uetake; Shuntaro Makino; Akira Ishii; Suguru Akiyama

doi:10.1117/12.3001629

12 March 2024 Waveguide-coupled germanium lateral uni-traveling-carrier photodetector for coherent applications at 130 Gbaud and beyond

Jianping Wang, Takasi Simoyama, Akira Oka, Mario Alberto Serrano-Núñez, Yoshihiko Yoshida, Kiyomasa Doi, Ayahito Uetake, Shuntaro Makino, Akira Ishii, Suguru Akiyama

Author Affiliations +

Proceedings Volume 12891, Silicon Photonics XIX; 128910L (2024) https://doi.org/10.1117/12.3001629
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

We propose a novel waveguide-coupled germanium lateral uni-traveling carrier photodetector (L-UTC PD) structure, which offers tremendous potential for coherent communication applications at 130 Gbaud and beyond. This PD structure is very simple and can be easily fabricated in a commercial silicon photonics (SiPh) foundry. The fabricated L-UTC PD has a very low dark current (~4.2 nA), a high responsivity (~0.66 A/W@1550 nm) and a small capacitance (<14.6 fF). Moreover, the L-UTC PD exhibits excellent tolerance to high optical input power, with a 3-dB bandwidth exceeding 67 GHz, even at a high photocurrent of 3.0 mA.

Conference Presentation

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

Citation Download Citation

Jianping Wang, Takasi Simoyama, Akira Oka, Mario Alberto Serrano-Núñez, Yoshihiko Yoshida, Kiyomasa Doi, Ayahito Uetake, Shuntaro Makino, Akira Ishii, and Suguru Akiyama "Waveguide-coupled germanium lateral uni-traveling-carrier photodetector for coherent applications at 130 Gbaud and beyond", Proc. SPIE 12891, Silicon Photonics XIX, 128910L (12 March 2024); https://doi.org/10.1117/12.3001629

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