29 January 2018 Optical terabit transmitter and receiver based on passive polymer and InP technology for high-speed optical connectivity between datacenters
Author Affiliations +
Abstract
We demonstrate the hybrid integration of a multi-format tunable transmitter and a coherent optical receiver based on optical polymers and InP electronics and photonics for next generation metro and core optical networks. The transmitter comprises an array of two InP Mach-Zehnder modulators (MZMs) with 42 GHz bandwidth and two passive PolyBoards at the back- and front-end of the device. The back-end PolyBoard integrates an InP gain chip, a Bragg grating and a phase section on the polymer substrate capable of 22 nm wavelength tunability inside the C-band and optical waveguides that guide the light to the inputs of the two InP MZMs. The front-end PolyBoard provides the optical waveguides for combing the In-phase and Quadrature-phase modulated signals via an integrated thermo-optic phase shifter for applying the pi/2 phase-shift at the lower arm and a 3-dB optical coupler at the output. Two InP-double heterojunction bipolar transistor (InP-DHBT) 3-bit power digital-to-analog converters (DACs) are hybridly integrated at either side of the MZM array chip in order to drive the IQ transmitter with QPSK, 16-QAM and 64-QAM encoded signals. The coherent receiver is based on the other side on a PolyBoard, which integrates an InP gain chip and a monolithic Bragg grating for the formation of the local oscillator laser, and a monolithic 90° optical hybrid. This PolyBoard is further integrated with a 4-fold InP photodiode array chip with more than 80 GHz bandwidth and two high-speed InP-DHBT transimpedance amplifiers (TIAs) with automatic gain control. The transmitter and the receiver have been experimentally evaluated at 25Gbaud over 100 km for mQAM modulation showing bit-error-rate (BER) performance performance below FEC limit.
Conference Presentation
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V. Katopodis, C. Tsokos, D. de Felipe, M. Spyropoulou, A. Konczykowska, A. Aimone, P. Groumas, J.-Y. Dupuy, F. Jorge, H. Mardoyan, R. Rios-Müller, J. Renaudier, P. Jennevé, F. Boitier, A. Pagano, M. Quagliotti, D. Roccato, T. K. Johansen, M. Tienforti, A. Vannucci, H.-G. Bach, N. Keil, H. Avramopoulos, Ch. Kouloumentas, Muriel Riet, "Optical terabit transmitter and receiver based on passive polymer and InP technology for high-speed optical connectivity between datacenters", Proc. SPIE 10561, Next-Generation Optical Communication: Components, Sub-Systems, and Systems VII, 1056107 (29 January 2018); doi: 10.1117/12.2290258; https://doi.org/10.1117/12.2290258
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