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14 August 2003 High-speed integrated photodetectors for 40-Gbit/s applications
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Photonic integrated photodetectors are built by combining guided-wave, optoelectronic and microwave devices. They offer high conversion efficiency, extremely high speed operation and high power linearity up to 20 mW of optical power. A careful design of the applied spot size converter allows an optimized fiber-chip coupling and polarization insensitive performance of the photodiodes. Recent results of electro-optic sampling measurements reveal 3 dB- and 6 dB-bandwidth of 64 GHz and 100 GHz, respectively, as well as an excellent phase linearity up to 160 GHz. Further integration of two photodiodes leads to e.g. 40 GHz balanced detectors enabling DPSK transmission for long-haul systems. Using optical pre-amplification an excellent sensitivity of -32 dBm was achieved at 40 Gbit/s.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Andreas Umbach "High-speed integrated photodetectors for 40-Gbit/s applications", Proc. SPIE 5246, Active and Passive Optical Components for WDM Communications III, (14 August 2003);

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