Patent ID: 7693358

Claim:
A distributed fiber optic sensor device that employs a photonic band gap fiber as a sensing medium, the photonic band gap fiber, which is the sensing medium, comprising: a quartz section; and a plurality of high refractive index portions provided in the quartz section along a longitudinal direction of the photonic band gap fiber, the high refractive index portions being photonic band gaps periodically arranged to form a triangular-lattice pattern; the photonic band gap fiber has a bandwidth which includes a wavelength band of a Stokes beam generated due to stimulated Raman scattering; the photonic band gap fiber has a band gap width which includes a wavelength band of an anti-Stokes beam generated due to the stimulated Raman scattering and a wavelength band of an optical signal incident into the photonic band gap fiber, and the distributed fiber optic sensor device further comprising a pulse light source for inputting the optical signal into the photonic band gap fiber at both ends of the photonic band gap fiber.