title: Rangeability extension of fiber-optic low-coherence measurement based on cascaded multistage fiber delay line.
abstract: We demonstrate a simple method to extend the measurable fiber length with a fiber-optic low-coherence technique. This method is based on a cascaded structure of multistage fiber delay line laid in one arm of the low-coherence technique. By choosing different individual stages in the cascaded fiber delay line, the length of the fiber under test can be continuously measured with a different measurement range. The measurement range of 0.81 km and spatial resolution of 60 μm are successfully realized.
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: Shuguang
authors.initials: S
authors.lastname: Li
authors.forename: Xinwan
authors.initials: X
authors.lastname: Li
authors.forename: Weiwen
authors.initials: W
authors.lastname: Zou
authors.forename: Jianping
authors.initials: J
authors.lastname: Chen