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Proceedings Paper

A 25-Gbps high-sensitivity optical receiver with 10-Gbps photodiode using inductive input coupling for optical interconnects
Author(s): Hideki Oku; Kiyomi Narita; Takashi Shiraishi; Satoshi Ide; Kazuhiro Tanaka
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Paper Abstract

A 25-Gbps high-sensitivity optical receiver with a 10-Gbps photodiode (PD) using inductive input coupling has been demonstrated for optical interconnects. We introduced the inductive input coupling technique to achieve the 25-Gbps optical receiver using a 10-Gbps PD. We implemented an input inductor (Lin) between the PD and trans-impedance amplifier (TIA), and optimized inductance to enhance the bandwidth and reduce the input referred noise current through simulation with the RF PD-model. Near the resonance frequency of the tank circuit formed by PD capacitance, Lin, and TIA input capacitance, the PD photo-current through Lin into the TIA is enhanced. This resonance has the effects of enhancing the bandwidth at TIA input and reducing the input equivalent value of the noise current from TIA. We fabricated the 25-Gbps optical receiver with the 10-Gbps PD using an inductive input coupling technique. Due to the application of an inductor, the receiver bandwidth is enhanced from 10 GHz to 14.2 GHz. Thanks to this wide-band and low-noise performance, we were able to improve the sensitivity at an error rate of 1E-12 from non-error-free to -6.5 dBm. These results indicate that our technique is promising for cost-effective optical interconnects.

Paper Details

Date Published: 2 February 2012
PDF: 6 pages
Proc. SPIE 8267, Optoelectronic Interconnects XII, 82670C (2 February 2012); doi: 10.1117/12.907979
Show Author Affiliations
Hideki Oku, Fujitsu Labs., Ltd. (Japan)
Kiyomi Narita, Fujitsu Labs., Ltd. (Japan)
Takashi Shiraishi, Fujitsu Labs., Ltd. (Japan)
Satoshi Ide, Fujitsu Labs., Ltd. (Japan)
Kazuhiro Tanaka, Fujitsu Labs., Ltd. (Japan)

Published in SPIE Proceedings Vol. 8267:
Optoelectronic Interconnects XII
Alexei L. Glebov; Ray T. Chen, Editor(s)

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