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

Search research articles

Related Experiment Video

Updated: Jun 15, 2026

Bringing the Visible Universe into Focus with Robo-AO

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

Acoustooptic modulator intensity servo.

|March 10, 2010

Summary

This summary is machine-generated.

A novel device uses a servo-controlled acoustooptic modulator for optical isolation and amplitude noise reduction. This system achieves significant noise reduction up to 100 kHz, enhancing optical signal stability.

Related Concept Videos

Sound Intensity Level

Sound Intensity Level

Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of hearing. The loudness of the environment in which a person is located determines whether they can distinguish between different sound sources.
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and hence a...

Sound Intensity

Sound Intensity

The loudness of a sound source is related to how energetically the source is vibrating, consequently making the molecules of the propagation medium vibrate. To measure the loudness of a source, the physical quantity of interest is the intensity. This is defined as the energy emitted per unit of time per unit of area perpendicular to the sound wave's propagation direction. Since the total energy is greater if the source vibrates for a longer duration and over a larger area, dividing the emitted...

Intensity and Pressure of Sound Waves

Intensity and Pressure of Sound Waves

The intensity of sound waves can be related to displacement and pressure amplitudes by using their wave expressions and the definition of intensity. The critical step to achieve this is to write the power delivered by the particles on the wave as the product of force and velocity and simplify the force per unit area as the pressure. The velocity of the medium's particles can be derived from the displacement.
Unlike the time average of a sinusoidal term, which is zero since it is positive and...

Potentiometer

Potentiometer

Voltage and current measurements using a standard voltmeter and ammeter alter the circuit being measured either by drawing or resisting the current flow, which introduces uncertainties in the measurements. Null measurements balance the voltages so that no current flows through the measuring device and, therefore, no alterations occur in the measured circuit.
Suppose the emf of a battery needs to be measured. If the battery is directly connected to a standard voltmeter, the measured quantity is...

Motor Unit Stimulation

Motor Unit Stimulation

When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...

Load-frequency control

Load-frequency control

Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...

You might also read

Related Articles

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

Sort by

Same author

Laser wavelength comparison by high resolution interferometry.

Applied optics·2010

Same author

Description, performance, and wavelengths of iodine stabilized lasers.

Applied optics·2010

Same author

Scanning tunneling microscopy applied to optical surfaces.

Optics letters·2009

Same author

Direct frequency measurement of the I(2)-stabilized He-Ne 473-THz (633-nm) laser.

Optics letters·2009

Same author

National Physical Laboratory-National Bureau of Standards iodine-stabilized helium-neon laser intercomparison.

Optics letters·2009

Same author

Evidence of tumbling multiplets in saturation absorption spectra of SiF(4).

Optics letters·2009

Same journal

Multifunctional reconfigurable terahertz metasurface based on vanadium dioxide phase transition: achieving broadband absorption and efficient polarization conversion.

Applied optics·2026

Same journal

High-Q-factor electromagnetically induced transparency utilizing quasi-bound states in the continuum in an all-dielectric terahertz metasurface.

Applied optics·2026

Same journal

Automated stitching interferometry for high-precision metrology of X-ray mirrors.

Applied optics·2026

Same journal

Experimental demonstration of an approach to designing a metal-dielectric DBR resonant cavity structure.

Applied optics·2026

Same journal

High-precision wavefront reconstruction from a single-shot interferogram using a physics-driven hybrid feature calibration network.

Applied optics·2026

Same journal

Ultra-high-Q Fano resonance based on coupled topological corner states in Kagome photonic crystals.

Applied optics·2026

See all related articles

Area of Science:

Optics and Photonics
Instrumentation
Control Systems

Background:

Optical systems often suffer from unwanted amplitude noise.
Achieving high levels of optical isolation and noise reduction simultaneously is challenging.
Acoustooptic modulators are versatile tools for light manipulation.

Purpose of the Study:

To develop a device combining optical isolation and amplitude noise reduction.
To investigate the performance limits of servo-controlled acoustooptic modulators for noise suppression.
To enhance the stability and quality of optical beams.

Main Methods:

Construction of a device incorporating a servo-controlled acoustooptic intensity modulator.
Application of negative feedback around the acoustooptic modulator.

More Related Videos

Switchable Acoustic and Optical Resolution Photoacoustic Microscopy for In Vivo Small-animal Blood Vasculature Imaging

Switchable Acoustic and Optical Resolution Photoacoustic Microscopy for In Vivo Small-animal Blood Vasculature Imaging

Published on: June 26, 2017

Optogenetic Stimulation of the Auditory Nerve

Optogenetic Stimulation of the Auditory Nerve

Published on: October 8, 2014

Related Experiment Videos

Last Updated: Jun 15, 2026

Bringing the Visible Universe into Focus with Robo-AO

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

Switchable Acoustic and Optical Resolution Photoacoustic Microscopy for In Vivo Small-animal Blood Vasculature Imaging

Switchable Acoustic and Optical Resolution Photoacoustic Microscopy for In Vivo Small-animal Blood Vasculature Imaging

Published on: June 26, 2017

Optogenetic Stimulation of the Auditory Nerve

Optogenetic Stimulation of the Auditory Nerve

Published on: October 8, 2014

Servoing the intensity of the Bragg diffracted beam to a constant value.

Main Results:

The device achieves high optical isolation, theoretically perfect.
Significant amplitude noise reduction is demonstrated up to 100 kHz.
Noise reduction levels as high as 80 dB are achieved at low frequencies.

Conclusions:

The servo-controlled acoustooptic modulator effectively combines optical isolation and amplitude noise reduction.
The developed device offers a robust solution for improving optical signal quality.
This technology has potential applications in sensitive optical experiments and systems.