Title :
Fiber-Optic Nerve Systems for materials that can feel pain
Author_Institution :
Univ. of Tokyo, Tokyo
Abstract :
Optical fibers can act as a sensor for strain or temperature through the properties, such as scattering. By applying ways to analyze distribution of the property along the fiber, "fiber optic nerve systems" are realized to sense damages induced in materials and structures, in which the fiber is embedded. We have proposed and developed a technique named "Brillouin Optical Correlation Domain Analysis; BOCDA". It is based on control of the correlation between the pump and probe continuous lightwaves, which excite the Stimulated Brillouin Scattering (SBS). A Single Side Band (SSB) Modulator can act as an ideal frequency shifter, and generate a probe ligtwave with a downshifted frequency. Strain distribution measurement with a long range has been demonstrated. By the correlation domain technique, we have also developed several "fiber optic nerve systems," including the multiplexed Bragg grating sensors with the same Bragg wavelength.
Keywords :
fibre optic sensors; optical correlation; optical pumping; stimulated Brillouin scattering; strain measurement; Bragg grating sensor; Brillouin optical correlation domain analysis; SSB; fiber-optic nerve system; frequency shifter; optical fiber sensor; single side band modulator; stimulated Brillouin scattering; strain distribution measurement; Brillouin scattering; Frequency; Optical fiber sensors; Optical fibers; Optical materials; Optical scattering; Optical sensors; Pain; Probes; Temperature sensors;
Conference_Titel :
Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-0931-0
Electronic_ISBN :
978-1-4244-0931-0
DOI :
10.1109/CLEOE-IQEC.2007.4386408