title: Two-beam interferometer with optical path difference magnified.
abstract: A two-beam interferometer is proposed and experimentally demonstrated with OPD magnified. Two cascaded fiber ring resonators with almost the same fiber length are spliced into a fiber loop. An acousto-optic modulator is employed to generate optical pulses and to choose the pulses traveling around one of the resonators for x trips. The interferometer is characterized in displacement in our experiment. Experimental results show the proportional relationship between the sensitivity and x. The high-sensitivity interferometer scheme is useful in some measurement applications that require high sensitivity, such as solid earth tide gauge.
authors: Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
authors: Liang
authors: L
authors: Zhang
authors: Ping
authors: P
authors: Lu
authors: Deming
authors: D
authors: Liu
authors: Jiangshan
authors: J
authors: Zhang
authors: Shun
authors: S
authors: Wang
authors: Dajian
authors: D
authors: Wang