Abstract
We describe and experimentally demonstrate automated identification of optical modulation formats
exclusively from physical-layer signal characteristics. The system identifies the data encoding as on–off keyed
versus binary or quadrature phase-shift keyed, as well as auxiliary modulation profiles. The symbol clock rate and
optimal dispersion compensation are also determined. We have validated this system with over 1500 test cases. These
are enabling functionalities for a universal optical receiver and for a cognitive optical network architecture that
optimizes utilization of available optical bandwidth. We demonstrate the capabilities of the system using a wavelength
division multiplexed signal consisting of 19 channels, with multiple modulation formats and widely varying
dispersions, signal strengths, and optical signal-to-noise ratios.
© 2014 IEEE
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