Accession Number : ADD014668

Title :   Optical Fiber Backscatter Signature Generator (OFBSG).

Descriptive Note : Patent, Filed 3 May 89, patented 28 Aug 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Kamikawa, Neil ; Nakagawa, Arthur ; Tanaka, Grant ; Yamada, Ken

Report Date : 28 Aug 1990

Pagination or Media Count : 18

Abstract : The optical fiber backscatter signal generator (OFBSG) generates simulated optical fiber backscatter waveform signals that are used to characterize or calibrate an optical time domain reflectometer (OTDR). An OTDR is a commercially available test instrument that measures loss and length of a fiber optic cable by launching an optical signal into the cable and measuringg the power that is reflected back (backscattered) into the OTDR. The OFBSG device creates a simulated optical fiber backscattered signal of a virtual cable and couples this signal into the OTDR so that length accuracy, loss accuracy, and dynamic range of the OTDR can be determined. An electrooptical secion, a signal generator section and a microprocessor section that is programmable to simulate a variety of cable anomalies, provide adaptability to accommodate a wide variety of OTDRs and, by reason of its sound engineering design, it is capable of being used under adverse conditions such as those encountered in this field. Patents. (jhd)

Descriptors :   *FIBER OPTICS TRANSMISSION LINES, *PATENTS, *REFLECTOMETERS, ACCURACY, ADAPTATION, ADVERSE CONDITIONS, ANOMALIES, LIGHT SCATTERING, CABLES, DYNAMIC RANGE, INSTRUMENTATION, LENGTH, LOSSES, MICROPROCESSORS, BACKSCATTERING, OPTICAL EQUIPMENT, OPTICS, REFLECTION, SIGNAL GENERATORS, SIGNALS, TEST EQUIPMENT, TIME DOMAIN

Subject Categories : Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE