Abstract
In recent times, phase-sensitive optical time domain reflectometers became widely common for monitoring of extended objects and providing necessary measurements in optical telecommunications. In this paper we present our investigations and results in the development and characterization of a new type of laser for phase-sensitive optical time domain reflectometry.
Highlights
IntroductionPhase-sensitive optical time domain reflectometers (φ-OTDR) are widely used in remote monitoring systems, providing a great amount of measurements for plants installation and security (pipelines, railway tracks, perimeter security, etc.), in proximity of an optical fiber [1,2,3,4,5]
Phase-sensitive optical time domain reflectometers (φ-OTDR) are widely used in remote monitoring systems, providing a great amount of measurements for plants installation and security, in proximity of an optical fiber [1,2,3,4,5]
In this paper we proposed a structure of an Yb-Er:glass laser system for φ-OTDR, meeting the requirements of high enough stability operation
Summary
Phase-sensitive optical time domain reflectometers (φ-OTDR) are widely used in remote monitoring systems, providing a great amount of measurements for plants installation and security (pipelines, railway tracks, perimeter security, etc.), in proximity of an optical fiber [1,2,3,4,5]. The most important component of a φ-OTDR is its laser source, which defines the quality of the system. Different requirements arise for a laser providing efficient and well-precise operation of the φ-OTDR. The Yb-Er:glass solid-state laser [6] presents a great interest as it has very good short-term wavelength stability and possibility of wavelength tuning for compensation of φ-OTDR sensitivity ‘dead zones’. One significant question is about finding the most adequate structure of the laser system, achieving the accuracy requirements for φ-OTDR with a simple and practical minilaser setup
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