Yang, C.-L.C.-L.YangLee, S.-L.S.-L.LeeWu, J.J.WuHEN-WAI TSAO2018-09-102018-09-102004http://www.scopus.com/inward/record.url?eid=2-s2.0-1642602707&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/307456A compact module including a polarization-selective electrooptic modulator and a light-emitting diode (LED) sensor is utilized for optical signal-to-noise-ratio (OSNR) monitoring and channel recognition. The modulator acts as a polarizer and provides signal dithering to improve the detection sensitivity, while the LED is used as a channel sensor. The channel sensor can monitor a wide wavelength range that is rapidly adjustable and can have much relaxed tolerance on temperature control. The combination of a polarization controller/rotator and the polarized modulator can accurately measure the OSNR between 5 and 35 dB with an error less than 0.5 dB.application/pdf185022 bytesapplication/pdfChannel monitoring; Fiber networks; Optical performance monitoring; Optical signal-to-noise-ratio (OSNR) monitoring; Wavelength-division multiplexing (WDM)[SDGs]SDG7Electrooptical devices; Light modulators; Light polarization; Sensitivity analysis; Sensors; Signal detection; Signal to noise ratio; Temperature control; Tuning; Video signal processing; Wavelength division multiplexing; Channel monitoring; Optical performance monitoring; Optical signal to noise ratio (OSNR); Communication channels (information theory)journal article10.1109/LPT.2004.8237562-s2.0-1642602707