Related Experiment Video
Updated: Dec 25, 2025

Implementation of a Reference Interferometer for Nanodetection
Published on: April 26, 2014
Phase-generated-carrier-modulated laser interferometer for measurement of ground vibration on an absolute gravimeter
Abstract:
This paper presents an innovative interferometer based on the phase-generated-carrier method to meet the requirement of micro-vibration detection on an absolute gravimeter. Our results, including those of both simulation and experiments, verified the feasibility of the interferometer. Based on this interferometer, continuous micro-vibrations are obtained and synchronously compared with the results detected by a 991B seismometer. The interferometer's accuracy reaches 10-8m, and the detected vibration frequency is less than 100 Hz. These findings can help broaden the application of interferometers and provide new guidelines for vibration measurement.
Related Concept Videos
Measuring Acceleration Due to Gravity
A simple pendulum can be described as a point mass and a string. Meanwhile, a physical pendulum is any object whose oscillations are similar to a simple pendulum, but cannot be modeled as a point mass on a string because its mass is distributed over a larger area. The behavior of a physical pendulum can be modeled using the principles of...
Electronic Distance Measuring Instruments
Galvanometer
The galvanometer consists of two concave-shaped permanent magnets, providing a uniform radial magnetic field in the annular region. In the center, a pivoted coil of fine copper wire is placed in the uniform...
Uncertainty in Measurement: Reading Instruments
Types of Global Positioning System Surveys

