30 July 2001 40-Gbit/s receivers for next-generation telecommunication systems
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Proceedings Volume 4532, Active and Passive Optical Components for WDM Communication; (2001) https://doi.org/10.1117/12.436009
Event: ITCom 2001: International Symposium on the Convergence of IT and Communications, 2001, Denver, CO, United States
Abstract
As the demand for increased bandwidth continues to grow, the implementation of 10 Gbit/s systems is underway and telecommunications companies are now beginning to see a need for 40 Gbit/s per channel. One of the key enablers for building such 40 Gbit/s systems is the availability of high bandwidth receivers. At 40 Gbit/s the fundamental tradeoff between the transit time limited bandwidth and the internal quantum efficiency for conventional surface illuminated PIN detectors makes them unsuitable. It is therefore necessary to employ a waveguide photodetector design. Many 40 Gbit/s systems employ return-to-zero transmission formats and polarization interleaving. This added complexity places additional demands on both the bandwidth and the polarization dependence of these detectors. The high demands placed on the detector design make an optoelectronic integrated circuit approach for the receiver very difficult to realize. In this paper, we will discuss a 40 Gbit/s receiver with a responsivity greater than 0.7 A/W and polarization dependence of less than 0.1 dB over the wavelength range from 1500 nm to 1620 nm. This receiver has a 3dB bandwidth of 40 Ghz, a conversion gain as high as 120 V/W, < 20 pA/(root) Hz input referred noise, < -7 dBm sensitivity, low deviation from linear phase, and a linear output swing greater than 0.8 V p-p.
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Mark Karnakewicz, Ola Sjoelund, Ayman Kanan, T. G. Beck Mason, Rao Gudimetla, Kai Hui, Jim Wang, J. Michael Geary, Julie Ji, Osamu Mizuhara, "40-Gbit/s receivers for next-generation telecommunication systems", Proc. SPIE 4532, Active and Passive Optical Components for WDM Communication, (30 July 2001); doi: 10.1117/12.436009; https://doi.org/10.1117/12.436009
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