title: Optical heterodyne micro-vibration measurement based on all-fiber acousto-optic frequency shifter.
abstract: An all-fiber optical heterodyne detection configuration was proposed based on an all-fiber acousto-optic structure, which acted as both frequency shifter and coupler at the same time. The vibration waveform within a frequency range between 1 Hz to 200 kHz of a piezoelectric mirror was measured using this optical heterodyne detection system. The minimal measurable vibration amplitude and resolution are around 6 pm and 1 pm in the region of tens to hundreds of kilohertz, respectively. The configuration has advantages of compact size, high accuracy and non-contact measurement. Moreover, it is of a dynamically adjustable signal-to-noise ratio to adapt different surface with different reflections in the measurement, which will improve the usage efficiency of the light power.
authors.forename: Wending
authors.initials: W
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Gao
authors.forename: Ligang
authors.initials: L
authors.lastname: Huang
authors.forename: Dong
authors.initials: D
authors.lastname: Mao
authors.forename: Biqiang
authors.initials: B
authors.lastname: Jiang
authors.forename: Feng
authors.initials: F
authors.lastname: Gao
authors.forename: Dexing
authors.initials: D
authors.lastname: Yang
authors.forename: Guoquan
authors.initials: G
authors.lastname: Zhang
authors.forename: Jingjun
authors.initials: J
authors.lastname: Xu
authors.forename: Jianlin
authors.initials: J
authors.lastname: Zhao