Title :
Optical fiber length measurement by external phase modulation type optical heterodyne reflectometry
Author :
Kimura, Tadashi ; Sawada, Isamu ; Sasaki, Noriyuki ; Noda, Ken-Ichi
Author_Institution :
Fac. of Technol., Tokyo Univ. of Agric. & Technol., Japan
fDate :
4/1/1989 12:00:00 AM
Abstract :
A method for measuring optical fiber length is proposed and demonstrated experimentally with external phase modulation optical heterodyne reflectometry using a He-Ne laser as a light source. The system offers a simple length-measuring method with satisfactory resolution. The reflected waves from fiber faults, if any, also can be detected by this method by observing two signals which occur at fault points and fiber end
Keywords :
fault location; gas lasers; length measurement; measurement by laser beam; optical fibres; optical modulation; reflectometry; He-Ne laser; external phase modulation; fault location; optical fibre length measurement; optical heterodyne reflectometry; Fiber lasers; Length measurement; Light sources; Optical fibers; Optical mixing; Optical modulation; Phase measurement; Phase modulation; Reflectometry; Signal resolution;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
