Title :
Wavelength Coded Optical Time-Domain Reflectometry
Author :
Zhu, Ning Hua ; Ke, Jian Hong ; Zhang, Hong Guang ; Chen, Wei ; Liu, Jian Guo ; Zhao, Ling Juan ; Wang, Wei
Author_Institution :
State Key Lab. on Integrated Optoelectron., Chinese Acad. of Sci., Beijing, China
fDate :
3/15/2010 12:00:00 AM
Abstract :
This paper presents a wavelength coded optical time-domain reflectometry based on optical heterodyne technique. In this scheme, the probe and reference optical pulses have different wavelengths. This enables optical heterodyne detection to be used to improve the system performances significantly. We demonstrate a spatial resolution of 2.5 m within a range of 60 km in weak-reflection signal detection and direct observation of Brillouin scattering over a long optical fiber, suggesting online fiber sensing possible. The principle of wavelength coding is applicable to other systems like lidar and radar to increase receiver sensitivity and simplify system structure.
Keywords :
Brillouin spectra; heterodyne detection; optical receivers; time-domain reflectometry; Brillouin scattering; online fiber sensing; optical fiber; optical heterodyne technique; optical pulses; receiver sensitivity; spatial resolution; wavelength coded optical time-domain reflectometry; weak-reflection signal detection; Brillouin scattering; optical heterodyne technique; optical time-domain reflectometry; tunable laser;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2009.2039853
