CPC H04B 10/516 (2013.01) [G02F 1/0121 (2013.01); G02F 1/225 (2013.01); G02F 7/00 (2013.01); H03M 1/002 (2013.01); H03M 1/70 (2013.01); H04B 10/2575 (2013.01); H04B 10/25891 (2020.05); H04B 10/505 (2013.01); H04B 10/541 (2013.01); H04B 10/556 (2013.01); G02F 1/015 (2013.01); G02F 1/212 (2021.01); G02F 2203/19 (2013.01); H04B 10/5055 (2013.01)] | 58 Claims |
1. An optical modulation system, the system comprising:
an input for receiving digital input words, each digital input word comprising a plurality of input data bits;
an input optical signal,
wherein the optical modulation system, based on a mapping, maps a digital input word received at the input to a corresponding digital output word comprising a plurality of output data bits,
wherein the mapping specifies, for each digital input word included in a set of possible digital input words for the plurality of input data bits, a corresponding digital output word from a set of possible digital output words for the plurality of output data bits,
wherein, for a first subset of digital input words specified in the mapping and having increasing values, deltas between values of digital output words in the set of possible digital output words, corresponding respectively to digital input words in the first subset, decrease,
wherein, for a second subset of digital input words specified in the mapping and having increasing values, deltas between values of digital output words in the set of possible digital output words, corresponding respectively to digital input words in the second subset, increase, and
wherein the optical modulation system further comprises a modulator for modulating the input optical signal responsively to the digital output word mapped from the digital input word, thereby generating one or more modulated optical signal outputs for transmission over one or more optical fibers.
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