Subpicosecond-time-domain reflectometry

Opt Lett. 1981 Sep 1;6(9):405-7. doi: 10.1364/ol.6.000405.

Abstract

We demonstrate a new method of optical time-domain reflectometry using subpicosecond pulses and nonlinear detection. The high-spatial-resolution ( approximately 15-microm) temporal resolution and sensitivity put new limits on the size and nature of defects that can be detected, localized, and analyzed in optical fibers.