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In this communication we propose a OSNR measurement system capable of perform in-band measures of optical noise in OOK/PSK channels. Our design takes advantage of the noise polarization insensibility, using a polarization interferometer to discriminate it from the signals.
We experimentally demonstrate a chromatic dispersion monitoring technique utilizing a delay-line interferometer and a <;10-GHz photodetector for 40-Gb/s OOK/DPSK. Spectral shift of RF dip changing with up to 560-ps/nm-CD is measured insensitive to 23-ps-DGD and <;15-dB-OSNR.
We demonstrate long-haul transmission of 50-Gb/s RZ and NRZ-DQPSK signals generated using an electroabsorption-based optical vector modulator. Transmission over 1650 km is achieved with less than 1.2 dB OSNR penalty relative to back-to-back performance.
We experimentally demonstrate for the first time phase-incoherent regeneration of DPSK signals based on fiber-Sagnac interferometer. Power penalty improvement of phase-, amplitude- and ASE-noise loaded signals up to 3 dB is reported at 40 Gb/s.
As optical networks become more complex, the need for in-line monitoring of more than just channel wavelength, power and OSNR becomes compelling. In this paper we describe an asynchronous delay tap sampling technique coupled with statistical machine learning that enables a single monitor to measure multiple simultaneous impairments on multiple formats. We demonstrate the technique for simultaneous...
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