Patent ID: 7113667

Claim:
A FEC enhanced system for an optical transport network comprising: an optical transmitter including a TxPIC chip having a photonic integrated circuit comprising an array of modulated sources representing channel signals on a wavelength grid and providing respective modulating data bit streams as channel signal outputs coupled to a multiplexer to provide a multiplexed output signal of the channel signal outputs; at least one FEC encoder coupled to the modulated sources to encode error-correcting code containing redundant information of the data bit stream for each channel signal; an optical receiver including a RxPIC chip having a photonic integrated circuit comprising a demultiplexer and an array of photodetectors couple to outputs of the demultiplexer; at least one FEC decoder coupled to the photodetectors to provide decoded data relating to the bit error rate (BER); and a controller in the optical receiver to provide real-time information to the optical transmitter relating to optical characteristics of the modulated sources based upon the BER data and to provide for adjustment of decision threshold values in the receiver to enhance data recovery.