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We propose a novel optical signal-to-noise ratio (OSNR) monitoring scheme using a Sagnac interferometer based on fiber birefringence. The proposed OSNR monitoring scheme is demonstrated in single and dual polarization systems, which shows incident polarization independence and dispersion insensitivity.
In this paper, we propose a simple in-band optical signal to noise ratio (OSNR) monitoring method based on the beat noise RF power measurement. This method splits the incoming optical signal into two branches, and one of the branches is processed by an optical band pass filter. Then, the signals in the two branches are detected by balanced receiver and the beat noise can be calculated. The simulation...
Chromatic dispersion (CD) and polarization mode dispersion (PMD) monitoring methods based on RF spectrum analysis are demonstrated experimentally. By using a narrow band FBG notch filter, centered at optical carrier/10GHz away from carrier, corresponding RF power ratio/power can be used as CD/PMD monitoring signal in high-speed optical communication systems such as 57-Gbit/s D8PSK.
In this paper, we propose a chromatic dispersion (CD) monitoring technique based on fiber Bragg grating (FBG) filtering and RF power ratio measurement. This method can measure CD value without the effects of polarization-mode dispersion (PMD) and received power for non-return-to-zero (NRZ) phase-modulated signals. A narrowband FBG notch filter is placed at the optical carrier wavelength, such that...
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