| 摘要 |
PURPOSE: Provided are an optic sensor system which uses a brillouin scattering amplification induced by modulating a pumping pulse light and CW(continuous wave) probe light, and a method for detecting an intruder by using the system. CONSTITUTION: The sensor system comprises a laser diode(31) for radiating a light; a coupler(32,38) for diverging the light radiated from the laser diode; the first modulating means(33) for modulating the diverged light into pumping pulse light; the second modulating means(36) for modulating the diverged, another light into CW probe light and outputting the light onto optic fiber; an optic fiber amplifier(37) for amplifying the pumping pulse light from the first modulating means and outputting the light onto the optic fiber; and a light detector(39) for detecting backscattering light returning from the optic fiber.
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