Title :
Performance improvement of a combined OTDR for distributed strain and loss measurement by randomizing the reference light polarization state
Author :
Kurashima, T. ; Tateda, M. ; Horiguchi, T. ; Koyamada, Y.
Author_Institution :
NTT Access Network Syst. Labs., Ibaraki, Japan
fDate :
3/1/1997 12:00:00 AM
Abstract :
We successfully improve the ability of an OTDR, which combines both BOTDR and COTDR functions, to measure strain and optical loss distribution along optical fibers, by randomizing the polarization state of the reference lightwave for optical coherent detection. The OTDR is upgraded to provide a high-spatial resolution of up to 1 m in the BOTDR mode and a fading noise as low as 0.05 dB in the COTDR mode.
Keywords :
optical fibre losses; optical fibre polarisation; optical fibre testing; optical loss measurement; optical resolving power; strain measurement; BOTDR; COTDR; COTDR mode; combined OTDR; distributed strain measurement; fading noise; high-spatial resolution; loss measurement; optical coherent detection; optical fiber measurement; optical loss distribution; optical time division reflectometry; performance improvement; polarization state; reference light polarization state; reference lightwave; Loss measurement; Optical detectors; Optical fiber losses; Optical fiber polarization; Optical fibers; Optical losses; Optical noise; Optical polarization; Performance loss; Strain measurement;
Journal_Title :
Photonics Technology Letters, IEEE
