High-resolution measurement of fiber length by using a mode-locked fiber laser configuration.
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.
Hu
Y L
YL
Department of Physics, Shanghai Jiao Tong University, Shanghai, China.
Zhan
L
L
Zhang
Z X
ZX
Luo
S Y
SY
Xia
Y X
YX