Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Gyroscope: Precession

Gyroscope: Precession

Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Identification of pathologically insignificant prostate cancer is not accurate in unscreened men.

British journal of cancer·2014

Same author

Improving solvent suppression in jump-return NOESY experiments.

Journal of biomolecular NMR·2012

Same author

Minimisation of sensitivity losses due to the use of gradient pulses in triple-resonance NMR of proteins.

Journal of biomolecular NMR·2012

Same author

Effects of dietary sulphur sources on concentrations of hydrogen sulphide in the rumen head-space gas of dairy cows.

Animal : an international journal of animal bioscience·2012

Same author

Enzymatic activity of albumin shown by coelenterazine chemiluminescence.

Luminescence : the journal of biological and chemical luminescence·2012

Same author

Measuring macromolecular diffusion using heteronuclear multiple-quantum pulsed-field-gradient NMR.

Journal of biomolecular NMR·2010

Search research articles

Related Experiment Video

Updated: Jul 8, 2026

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Published on: May 29, 2014

Mode matching for a passive resonant ring laser gyroscope.

T D Baxter¹, T T Saito, G L Shaw

¹US Air Force Academy, Colorado Springs, Colorado 80840, USA.

|August 15, 1983

Summary

This study details a method for optimizing laser mode matching in ring laser gyros using cylindrical lenses. Proper mode matching significantly enhances the lowest-order mode amplitude and suppresses higher-order modes.

More Related Videos

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

Published on: August 8, 2025

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Related Experiment Videos

Last Updated: Jul 8, 2026

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Published on: May 29, 2014

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

Published on: August 8, 2025

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Area of Science:

Optics
Laser Physics
Optical Engineering

Background:

Passive resonant ring laser gyros are sensitive to input laser mode characteristics.
Efficient operation requires matching the input laser mode to the lowest-order cavity mode.

Purpose of the Study:

To develop and analyze an analytical method for mode matching in passive resonant ring laser gyros.
To determine optimal parameters for cylindrical mode-matching lenses.

Main Methods:

Described an analytical method for mode matching.
Detailed steps for locating and calculating focal lengths of cylindrical lenses.
Experimentally compared results with no mode matching, spherical lens, horizontal-only, and full cylindrical lens matching.

Main Results:

The amplitude of the lowest-order mode increased approximately 2.5 times with proper cylindrical lens mode matching compared to no matching.
Higher-order modes were reduced to near zero intensity.
The relative intensity of the lowest-order mode to higher-order modes increased from ~5x to ~60x.

Conclusions:

Cylindrical mode-matching lenses are crucial for optimizing passive resonant ring laser gyro performance.
Effective mode matching significantly improves signal quality and reduces noise by enhancing the fundamental mode and suppressing unwanted higher-order modes.