Design and demonstration of high-speed and high-power traveling-wave germanium photodetector

Design and demonstration of high-speed and high-power traveling-wave germanium photodetector

Traveling-wave photodetector (TWPD) with output photocurrent of over 127.5 mA and 3-dB bandwidth of 36.8 GHz at 1 mA is demonstrated. Under the photocurrent of 40 mA, the 8-PD TWPD shows a bandwidth of 32.3 GHz and realizes clear 50 Gb/s open eye diagram in such a high-power situation. Based on refl...

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Veröffentlicht in:IEEE photonics technology letters 2023-11, Vol.35 (21), p.1-1
Hauptverfasser: Zhu, Yupeng, Liu, Zhi, Liu, Xiangquan, Chen, Dan, Cui, Jinlai, Yang, Yazhou, Huang, Qinxing, Zheng, Jun, Zuo, Yuhua, Cheng, Buwen
Format: Artikel
Sprache:eng
Schlagworte:
Bandwidth
Capacitance
CMOS
equivalent circuit model
Equivalent circuits
Germanium
High speed
High-power photodetector
Integrated circuit modeling
Optical distortion
Optical reflection
Photoconductivity
Photoelectric effect
Photoelectric emission
Photometers
Traveling waves
traveling-wave electrode
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Zusammenfassung:Traveling-wave photodetector (TWPD) with output photocurrent of over 127.5 mA and 3-dB bandwidth of 36.8 GHz at 1 mA is demonstrated. Under the photocurrent of 40 mA, the 8-PD TWPD shows a bandwidth of 32.3 GHz and realizes clear 50 Gb/s open eye diagram in such a high-power situation. Based on reflection coefficients and equivalent circuit, the current-dependent phenomenon of PD junction capacitance and its influence on high-speed behavior of TWPD at high-power mode is proposed and analyzed. The detailed analysis and experimental demonstration of this work will provide effective guidance for the design and manufacture of high-performance TWPD.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2023.3308341