Paper
3 April 2009 Reflectometer with linear frequency modulated subcarrier
Lev R. Aybatov
Author Affiliations +
Proceedings Volume 7374, Optical Technologies for Telecommunications 2008; 73740L (2009) https://doi.org/10.1117/12.829040
Event: Optical Technologies for Telecommunications 2008, 2008, Kazan, Russian Federation
Abstract
Construction principles are considered for reflectometers with linear frequency modulated (LFM) subcarrier intended for monitoring of fiber-optic communication links. Analysis of energy characteristics for square-law photodetection regime of optical signals was fulfilled. The analysis of photoresistor operation under radio-heterodyning regime was fulfilled and practical schemes for reflectometry with linear frequency modulated subcarrier has been elaborated to realize advantages of continuous-wave sounding methods at infrared spectral band which is especially important for monitoring of fiber-optic communication links. The processes of backscattering signals accumulation were investigated for reflectometers with LFM subcarrier. Energy characteristics of reflectometers with LFM subcarrier were researched and large range of these systems (86.1 km) was confirmed for sounding beam power 1 mW.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Lev R. Aybatov "Reflectometer with linear frequency modulated subcarrier", Proc. SPIE 7374, Optical Technologies for Telecommunications 2008, 73740L (3 April 2009); https://doi.org/10.1117/12.829040
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KEYWORDS
Reflectometry

Modulation

Photoresistors

Continuous wave operation

Photodetectors

Backscatter

Optical fibers

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