P. Runge, S. Schubert, A. Seeger, T. Gartner, K. Janiak, J. Stephan, D. Trommer, M. Nielsen
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Monolithic InP receiver chip with a 90° hybrid and a variable optical attenuator for 100GBit/s colourless WDM detection
We demonstrate a monolithically integrated quadrature coherent receiver photonic integrated circuit (PIC) on an InP substrate with a 90° optical hybrid, a variable optical attenuator (VOA) and four pin-photodetectors. With an attenuation of more than 20dB the VOA enables the usage of the receiver PIC for colourless WDM detection.