Bandwidth efficient dual carrier

摘要

In some examples, a transmit assembly is described that may include a first optical transmitter, a second optical transmitter, and a polarizing beam combiner. The first optical transmitter may be configured to emit a first optical data signal centered at a first frequency. The second optical transmitter may be configured to emit a second optical data signal centered at a second frequency offset from the first frequency by a nominal offset n. The polarizing beam combiner may be configured to generate a dual carrier optical data signal by polarization interleaving the first optical data signal with the second optical data signal. An output of the polarizing beam combiner may be configured to be communicatively coupled via an optical transmission medium to a polarization-insensitive receive assembly.

主权项

1. A transmit assembly, comprising:
a first optical transmitter configured to emit a first non-return-to-zero (NRZ) optical data signal centered at a first frequency, wherein the first NRZ optical data signal is amplitude modulated; a second optical transmitter configured to emit a second NRZ optical data signal centered at a second frequency offset from the first frequency by a nominal offset n, wherein the second NRZ optical data signal is amplitude modulated; and a polarizing beam combiner configured to generate a dual carrier optical data signal by polarization interleaving the first NRZ optical data signal with the second NRZ optical data signal; wherein:
an output of the polarizing beam combiner is configured to be communicatively coupled via an optical transmission medium to a polarization-insensitive receive assembly;the optical transmission medium is devoid of dispersion compensating elements;a spectral efficiency of the dual carrier optical data signal is at least 1 bit per second per hertz; andthe nominal offset n is less than a bit rate of the amplitude modulated first or second NRZ optical data signal such that frequency spectrums of the amplitude modulated first and second NRZ optical data signals overlap.