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Photonic vector signal generation employing a novel optical direct-detection in-phase/quadrature-phase upconversion

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Abstract

This work demonstrates the feasibility of the generation of an RF direct-detection vector signal using optical in-phase/quadrature-phase (I/Q) upconversion. The advantage of the proposed transmitter is that no electrical mixer is needed to generate the RF signal. Therefore, I/Q data of RF signals are processed at baseband at the transmitter, which is independent of the carrier frequency of the generated RF signal. A 10Gb/s 16 quadrature amplitude modulation signal is experimentally demonstrated. Following transmission over a 50km single-mode fiber, the power penalty is negligible. Moreover, I/Q imbalance of the proposed transmitter is studied and compensated by digital signal processing, which is both numerically and experimentally verified.

© 2010 Optical Society of America

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