Optics: measuring and testing – For optical fiber or waveguide inspection
Reexamination Certificate
2005-10-11
2005-10-11
Nguyen, Tu T. (Department: 2877)
Optics: measuring and testing
For optical fiber or waveguide inspection
Reexamination Certificate
active
06954264
ABSTRACT:
In order to improve a measuring precision in case of measuring properties of the optical fiber to be measured, in accordance with returned lights which have wavelengths different from each other, detection is carried out with respect to the returned lights of the wavelengths different from each other, at a timing based on difference of propagation rates between the returned lights in the optical fiber to be measured, and error between the returning points is compensated with respect to each returned light, in the optical pulse testing device for inputting the optical pulse to the optical fiber to be measured, to detect returned lights which have wavelengths different from each other and which are returned back from passing points in the optical fiber to be measured, respectively, in order to measure the properties of the optical fiber to be measured, in accordance with detection results of the returned lights.
REFERENCES:
patent: 6614512 (2003-09-01), Sakamoto et al.
patent: 2002/0141029 (2002-10-01), Carlson et al.
patent: 2126820 (1984-03-01), None
patent: 2163315 (1986-02-01), None
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patent: 2202046 (1988-09-01), None
Araki Tetsuya
Hirata Katsumi
Kuratsu Makoto
Nguyen Tu T.
Yokogawa Electric Corporation
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