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Application of Software-Defined Radio for Rayleigh and Raman Scattering Measurement in Optical Fibers

Shatarah I. S. M., Więcek B.

Measurement Automation Monitoring

2018

Vol. 64, No. 4

112--115

A laboratory system for measuring the Raman scattering light in optical fiber is presented. The system is equipped with the developed driver for 5 mW/1550 nm laser diode, optical circulator, WDM filters to separate Rayleigh and Raman scattered light and InGaAs cooled photodiode to detect the weak scattered radiation. Instead of using expensive network analyzer we propose to use Software-Defined Radio, which ensures the necessary sensitivity and selectivity of detected signals. The preliminary results are presented for about 3 km – length single mode silica optical fiber.