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High dynamic range is a key requirement in analog applications. In multichannel optical signal processing applications, a wideband radio-frequency signal suffers from distortion from both in-channel and out-of-channel signals due to nonlinear modulator behavior. We demonstrate experimentally the compensation of nonlinearities occurring due to out-of-channel “cross-modulation” with a novel predistortion...
We present the compensation of nonlinearities due to cross-modulation for high dynamic range in RF channelization applications using a novel predistortion method. Simulations show that the cross-modulation nonlinearity, a key limitation, can be suppressed by more than 30dB.
We experimentally demonstrate compensation of nonlinearity due to cross-gain modulation in wideband analog systems employing narrow-band optical filtering, which is essential for multi-channel optical signal processing in RF channelizer applications.
We review recent developments in coherent, spectral phase coded optical code-division multiplexed (OCDM) systems employing integrated ring-resonator based coding technologies. We describe progress in advanced modulation formats for improved spectral efficiency and long distance transmission.
We experimentally demonstrate a novel multiscale sampling technique for extending the dynamic range of a phase-modulated analog optical system employing passband signals by 20 dB. Envelope distortion is compensated using digital post-processing.
All-Raman transmission of 128times42.7 Gb/s at 50 GHz channel spacing over 1280 km of standard single-mode fiber is demonstrated. This record capacity for this high spectral efficiency is achieved by strong filtering of carrier-suppressed return-to-zero signals
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