Title :
Resolution control of low-coherence optical time-domain reflectometer between 14 and 290 mu m
Author :
Takada, Kazumasa ; Himeno, Akira ; Yukimatsu, Ken-ichi
Author_Institution :
NTT Corp., Tokyo, Japan
fDate :
7/1/1991 12:00:00 AM
Abstract :
A low-coherence OTDR that can control spatial resolution is demonstrated through the use of a new light source consisting of a superluminescent diode (SLD), an AR-coated LD booster amplifier, and two identical optical bandpass filters: one for truncating the SLD output, and the other for reducing amplified spontaneous emission. The resolution is changed from 14 to 290 mu m for single mode fibers by using filters with different bandwidths. Backscattering measurements are demonstrated for a fiber at three resolutions: 14, 44, and 290 mu m. The best dynamic range at 10 Hz detection bandwidth is found to be 18 dB at 290 mu m resolution.<>
Keywords :
backscatter; light scattering; optical fibres; optical resolving power; optical testing; reflectometers; time-domain reflectometry; 10 Hz; 14 to 290 micron; AR-coated LD booster amplifier; amplified spontaneous emission; backscattering measurements; bandwidths; dynamic range; light source; low-coherence OTDR; optical bandpass filters; optical time-domain reflectometer; resolution control; single mode fibers; spatial resolution; superluminescent diode; Band pass filters; Bandwidth; Light sources; Lighting control; Optical control; Optical filters; Spatial resolution; Stimulated emission; Superluminescent diodes; Time domain analysis;
Journal_Title :
Photonics Technology Letters, IEEE
