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Optical signal to noise ratio (OSNR) monitoring is an important topic of optical performance monitoring. A robust OSNR monitoring scheme is desired for management of dynamic optical networks. In this paper, our OSNR monitoring methods based on optical filtering effects are reviewed, which exhibit the merits of dispersion insensitivity, low cost, and simple operation.
Optical performance monitoring (OPM) can offer great assistances for intelligent system management of future smart optical networks. Since different optical impairments induce received electrical signal waveform distortion in different forms and degrees, analysis on electrical waveform distortion is an alternative way to monitor optical impairment by using electrical sampling technique, which takes...
In this paper, we propose and demonstrate inband OSNR monitoring in 100-Gb/s PDM RZ-DQPSK system by using cost-effective low bandwidth sampling technique. The OSNR monitoring is insensitive to PMD effect.
We experimentally demonstrate optical signal to noise ratio (OSNR) and chromatic dispersion (CD) monitoring simultaneously in NRZ-DPSK and DQPSK systems by using single 2-dimension (2-D) phase portrait, which is generated by single-channel sampling technique.
In this paper, we propose a novel optical notch filtering scheme, which can be used for optical signal to noise ratio (OSNR) monitoring. OSNR monitoring for 10-Gb/s and 40-Gb/s NRZ-OOK, NRZ-DPSK and Duo-binary signals are demonstrated in VPI transmission maker 7.6. Low bandwidth photo detector adopted in the monitoring scheme would provide immunity to chromatic dispersion (CD) and low cost solution.
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...
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