title: High-resolution measurement of fiber length by using a mode-locked fiber laser configuration.
abstract: A simple method to precisely measure fiber length has been experimentally demonstrated by using a mode-locked fiber laser configuration. Since the transit time in a cavity is exactly proportional to the cavity length, it is easy to obtain the fiber length from the generation of mode-locked pulses in the fiber laser with a long-range nonlinear optical loop mirror that includes the measured fiber. Our new method has a large measurement range, over hundreds of kilometers, and a high resolution, of the order of centimeters, as well as no measurement dead zone.
authors.affiliation: Department of Physics, Shanghai Jiao Tong University, Shanghai, China.
authors.forename: Y L
authors.initials: YL
authors.lastname: Hu
authors.forename: L
authors.initials: L
authors.lastname: Zhan
authors.forename: Z X
authors.initials: ZX
authors.lastname: Zhang
authors.forename: S Y
authors.initials: SY
authors.lastname: Luo
authors.forename: Y X
authors.initials: YX
authors.lastname: Xia