title: Picometer displacement sensing using the ultrahigh-order modes in a submillimeter scale optical waveguide.
abstract: 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.
authors.forename: Fan
authors.initials: F
authors.lastname: Chen
authors.forename: Zhuangqi
authors.initials: Z
authors.lastname: Cao
authors.forename: Qishun
authors.initials: Q
authors.lastname: Shen
authors.forename: Xiaoxu
authors.initials: X
authors.lastname: Deng
authors.forename: Biming
authors.initials: B
authors.lastname: Duan
authors.forename: Wen
authors.initials: W
authors.lastname: Yuan
authors.forename: Minghuang
authors.initials: M
authors.lastname: Sang
authors.forename: Shengqian
authors.initials: S
authors.lastname: Wang