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Phase-incoherent DQPSK wavelength conversion using a photonic integrated circuit

: Bougioukos, M.; Richter, T.; Kouloumentas, C.; Katopodis, V.; Harmon, R.; Rogers, D.; Harrison, J.; Poustie, A.; Maxwell, G.; Schubert, C.; Avramopoulos, H.


IEEE Photonics Technology Letters 23 (2011), Nr.22, S.1649-1651
ISSN: 1041-1135
Fraunhofer HHI ()

We investigate the performance of a large-scale, silica-on-silicon photonic integrated circuit for multiformat signal processing, and we experimentally demonstrate wavelength-conversion of (differential) quadrature phase-shift keying [(D)QPSK] signals. The circuit exploits phase-incoherent techniques to decode the input signal and to phase remodulate two phase-shift-keying components before combining them in a common QPSK output stream. Error-free wavelength conversion with 4-dB power penalty is reported at 44 Gb/s.