Other

Yokogawa Electric Corporation

Ando Electric Company

Kyusyu Ando Electric Company Limited

Katsumi Hirata

Tetsuya Araki

Makoto Kuratsu

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.

Optical pulse testing device

An optical pulse &#x3bb;from a light source sectionis incident upon an optical fiberthrough an optical demultiplexer sectionand its return light is supplied to an optical/electrical processing sectionas the light of a plurality of different wavelengths &#x3bb;to &#x3bb;n by the optical demultiplexer sectionand is respectively converted into electrical signals. Signals of the converted return light are respectively sampled and are averaged by respective processing circuitstoof a signal processing sectionso as to be formed as desired measurement waveforms. In the measurement waveforms, which are the results, data for corresponding sampling points are expressed as measurement data at an identical distance in the optical fiber.

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Yokohama, Japan

Katsumi Hirata