January 01, 2014

High performance monolithically integrated SOA-UTC photoreceiver for 100Gbit/s applications

  • Achouche M.
  • Anagnosti M.
  • Caillaud C.
  • Glastre G.
  • Lanteri D.
  • Paret J.

In this paper we present a high-speed photo-detector comprising a uni-traveling carrier photo-diode (UTC PD) monolithically integrated with a semiconductor optical amplifier (SOA) for 100Gbit/s applications. This new pre-amplified photoreceiver design operates at 1.55μm wavelength with the UTC PD exceeding 110GHz 3dB bandwidth at high input powers and a dark current of 1 nA. A 40% bandwidth improvement is achieved by employing new optimized transmission lines (TMLs) to equalize the intrinsic response of the detector. The high performance buried heterostructure SOA exhibits low polarization dependence loss (<;1dB) low noise figure (~8dB) and 19dB gain allowing to achieve a responsivity of >50AIW. The bias dependence of the gain and the carrier recombination was analyzed using differential carrier lifetime measurements.

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