G - Physics – 01 – D
Patent
G - Physics
01
D
G01D 5/353 (2006.01) G01L 11/02 (2006.01) G01M 11/02 (2006.01)
Patent
CA 2615327
An optical fiber characteristic measuring system includes a device for generating a pulse train from coherent light having a first frequency, and launching the pulse train as pulsed light into one end of a target optical fiber to be measured, wherein the pulse train includes a first light pulse and a second light pulse, and the temporal interval between the center of the pulse width of the first light pulse and the center of the pulse width of the second light pulse is less than or equal to the lifetime of an acoustic wave in the target optical fiber; a device for launching coherent light having a second frequency as continuous light into another end of the target optical fiber; a device for varying the difference between the first frequency and the second frequency within a range which includes a Brillouin frequency shift with respect to the target optical fiber; a device for detecting light, which is emitted from said one end of the target optical fiber; and a device for measuring characteristics of the target optical fiber based on a result of the light detection.
Bcf Llp
Koyamada Yahei
Yokogawa Electric Corporation
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