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High-speed high-performance vertical-illumination type 100% Ge-on-Si photodetectors for optical data communications

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5 Author(s)
In Gyoo Kim ; Electron. & Telecommun. Res. Inst., Daejeon, South Korea ; Sanghoon Kim ; Ki-Seok Jang ; Jiho Joo
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We present a high-speed high-responsivity vertical-illumination-type 100% Ge-on-Si photodetector (PD) based on silicon photonics technology. At λ=1550nm, the fabricated germanium photodetectors exhibit the responsivity of 0.92A/W, 0.73 A/W, and 0.45A/W for the data rate of 10Gbps, 25Gbps and 40Gbps, respectively. The devices show the -3dB bandwidth (f-3dB) up to 45GHz, and display good eye-openings up to 50Gbps data transmission. These results indicate the readiness of the Ge-on-Si PD for optical network communication applications.

Published in:

Opto-Electronics and Communications Conference (OECC), 2012 17th

Date of Conference:

2-6 July 2012