A 25-Gbps high-sensitivity optical receiver with 10-Gbps photodiode using inductive input coupling for optical interconnects

Hideki Oku; Kiyomi Narita; Takashi Shiraishi; Satoshi Ide; Kazuhiro Tanaka

doi:10.1117/12.907979

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2 February 2012 A 25-Gbps high-sensitivity optical receiver with 10-Gbps photodiode using inductive input coupling for optical interconnects

Hideki Oku, Kiyomi Narita, Takashi Shiraishi, Satoshi Ide, Kazuhiro Tanaka

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Proceedings Volume 8267, Optoelectronic Interconnects XII; 82670C (2012) https://doi.org/10.1117/12.907979
Event: SPIE OPTO, 2012, San Francisco, California, United States

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.

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Hideki Oku, Kiyomi Narita, Takashi Shiraishi, Satoshi Ide, and Kazuhiro Tanaka "A 25-Gbps high-sensitivity optical receiver with 10-Gbps photodiode using inductive input coupling for optical interconnects", Proc. SPIE 8267, Optoelectronic Interconnects XII, 82670C (2 February 2012); https://doi.org/10.1117/12.907979

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