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A Standalone Burst-Mode Receiver With Clock and Data Recovery, Clock Phase Alignment, and RS(255, 239) Codes for SAC-OCDMA Applications

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6 Author(s)

We demonstrate a standalone (no global clock) burst-mode receiver (BMRx) for a 7 times 622 Mb/s incoherent spectral-amplitude-coded optical code-division multiple-access system. The receiver provides the following functions: quantization (intensity noise filtering), clock and data recovery, burst-mode functionality (automatic phase acquisition) using a clock phase aligner (CPA), framing (for byte synchronization), and forward-error correction (FEC) using a (255, 239) Reed-Solomon decoder. The receiver provides an instantaneous (zero preamble bit) phase acquisition time for any phase step (plusmn2pi rads) between consecutive packets. With the CPA, we report a zero packet loss ratio (PLR) for up to four simultaneous users and more than a 300-fold improvement in the PLR for a fully loaded system. The BMRx also accomplishes more than 2.5 dB of coding gain, and achieves error-free (bit-error rate ) operation for a fully loaded system.

Published in:

Photonics Technology Letters, IEEE  (Volume:20 ,  Issue: 5 )