Patent ID: 8290371
Filing Date: 2012-10-16
Classification: H04J,H04K

Abstract:
1. An optical system for transporting data, comprising a source for generating a sequence of optical pulses each optical pulse comprising a plurality of spectral lines uniformly spaced in frequency with fixed absolute frequency and relative phase; a set of data modulators each associated with a tributary/channel and operable to modulate the sequence of pulses using tributary/channel data to produce a modulated data signal; a set of encoders imparting a plurality of orthogonal codes, each of the plurality of orthogonal codes being associated with one of the data modulators to spectrally encode the modulated data signal to produce an encoded data signal; an optical combiner for bit-synchronously combining the encoded data signals into a composite transport data signal wherein each tributary/channel shares the same spectral bandwidth during transmission; a shared spectral phase scrambler for phase scrambling the composite transport data signal using a shared scramble code as an encryption key to generate the encrypted signal; a shared spectral phase descrambler for descrambling the encrypted signal using a shared descramble code as a key to generate a descrambled data signal, the shared descramble code being a compliment of the shared scramble code; and a set of decoders each of which is a conjugate match to one of the encoders, for spectrally decoding a specified encoded data signal to produce a set of decoded data signals.