You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
16 May 2008Ultra-long-distance (230 km) FBG sensor system
An ultra-long-distance Fiber Bragg Grating (FBG) sensor system using a high-speed swept-wavelength light source
(HSLS) is proposed and demonstrated. The light output of the HSLS is amplified and turned on and off, and its timing is
synchronized to the sweep signal of the HSLS to reduce optical noise caused by Rayleigh scattering from the
transmission fiber. This system can detect changes in FBG reflection wavelengths even when the FBGs are located at a
distance of 230 km.