Picometer displacement sensing using the ultrahigh-order modes in a submillimeter scale optical waveguide.
An improved scheme for displacement measurement using the ultrahigh-order guided modes in a symmetrical metal-cladding optical waveguide is proposed. Based on this idea together with the lock-in amplification technique, a sensor with a stable displacement resolution of 3.3 pm is experimentally demonstrated without any complicated servo system.
Chen
Fan
F
Cao
Zhuangqi
Z
Shen
Qishun
Q
Deng
Xiaoxu
X
Duan
Biming
B
Yuan
Wen
W
Sang
Minghuang
M
Wang
Shengqian
S