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OTDR Last modified: Tuesday, May 29, 2001
Short for Optical Time Domain Reflectometer, an instrument that analyzes the light loss in an optical fiber in optical network trouble shooting. An OTDR injects a short, intense laser pulse into the optical fiber and measures the backscatter and reflection of light as a function of time. The reflected light characteristics are analyzed to determine the location of any fiber optic breaks or splice losses.
	Related Categories Cables Fiber Optics Lasers Related Terms fiber optics optoelectronics