An optical fiber link detection system and method based on digital modulation signal
A digital linear and frequency modulation signal technology, applied in the transmission system, electromagnetic wave transmission system, electrical components, etc., can solve the problems of high cost, conflict between dynamic range and measurement resolution, and achieve the effect of increasing equipment cost
Inactive Publication Date: 2018-12-18
WUHAN POST & TELECOMM RES INST CO LTD
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Abstract
The invention discloses an optical fiber link detection system and a method based on a digital linear frequency modulation signal. The system comprises a digital modulation signal generator, a circulator and a receiver. The digital modulation signal generator is used for generating a detection signal in the form of a digital modulation optical pulse and injecting the detected optical fiber throughthe circulator. The receiver extracts the detected optical fiber features carried by the detection signal from the backscattered signal. The invention utilizes the characteristic that the linear frequency modulation signal has excellent energy gathering in the fractional Fourier domain, by using digital LFM optical pulse as detection signal, LFM signals with different FM ranges are separated fromnoise in backscattered signals, and the characteristics of detected optical fiber are extracted, which can improve the dynamic range and measurement range resolution of optical fiber link detection simultaneously without increasing the cost.
Application Domain
Electromagnetic transmission
Technology Topic
PhysicsVIT signals +8
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