Xf. Chen et al., AN IMPROVED OTDR TECHNIQUE ON NONREFLECTIVE EVENT LOCATING ACCURACY WITH MINOR REFLECTION CONSIDERED, IEEE photonics technology letters, 10(4), 1998, pp. 570-572
Improvement on the nonreflective locating accuracy is still a problem
for short pulse duration of an OTDR. When the reflected term is consid
ered, with the novel judgment function proposed in this letter, such p
roblems can be solved. The locating precision could not exceed 1 m for
OTDR pulse duration of 100 ns and 0.4 m for 50 ns.