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

MOSFET Amplifiers

MOSFET Amplifiers

The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...

Controlled-Current Coulometry: Overview

Controlled-Current Coulometry: Overview

Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...

Time and frequency -Domain Interpretation of Phase-lag Control

Time and frequency -Domain Interpretation of Phase-lag Control

Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any finite,...

MOSFET: Enhancement Mode

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...

Phase-lead and Phase-lag Controllers

Phase-lead and Phase-lag Controllers

Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass filters, manage...

Generator Voltage Control

Generator Voltage Control

Generator voltage control is crucial for maintaining the stable operation of synchronous generators and wind turbines. In older models, a DC generator driven by the rotor delivers DC power to the rotor's field winding, and the power is transferred through slip rings and brushes. In the latest models, static or brushless exciters are used. Static exciters rectify AC power from the generator terminals and then transfer the DC power directly to the rotor. Brushless exciters, on the other hand, use...

You might also read

Related Articles

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

Sort by

Same author

Understanding and correcting wavenumber error in interference pattern structured illumination imaging.

Optics express·2022

Same author

Layer-by-Layer Pyramid Formation from Low-Energy Ar<sup>+</sup> Bombardment and Annealing of Ge (110).

Nanomaterials (Basel, Switzerland)·2021

Same author

Laser wavelength metrology with low-finesse etalons and Bayer filters.

Optics express·2020

Same author

Magneto-Optical Trap Field Characterization with the Directional Hanle Effect.

Scientific reports·2019

Same author

Light splitting with imperfect wave plates.

Applied optics·2017

Same author

Laser wavelength metrology with color sensor chips.

Optics express·2015

Search research articles

Related Experiment Video

Updated: Jul 3, 2026

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

An ultrahigh stability, low-noise laser current driver with digital control.

Christopher J Erickson¹, Marshall Van Zijll, Greg Doermann

¹Department of Physics and Astronomy, Brigham Young University, Provo, Utan 84602, USA.

The Review of Scientific Instruments

|August 7, 2008

Summary

We developed a stable laser current driver with digital control for precise, repeatable performance. This improved design minimizes noise and phase lag, enhancing laser system accuracy and stability.

More Related Videos

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Related Experiment Videos

Last Updated: Jul 3, 2026

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Area of Science:

Physics
Electrical Engineering
Optics

Background:

Laser systems require stable and precise current drivers for optimal performance.
Existing designs like the Hall-Libbrecht driver have limitations in noise and stability.
Remote digital control offers potential for improved accuracy and reduced system complexity.

Purpose of the Study:

To present a novel laser current driver design with low noise and high modulation bandwidth.
To improve upon the stability and accuracy of existing laser current drivers.
To enable remote digital control for enhanced repeatability and performance.

Main Methods:

Design and implementation of a new laser current driver circuit.
Integration of a microprocessor unit for digital set-point control.
Comprehensive characterization of driver performance, including stability, noise, accuracy, and bandwidth.

Main Results:

The developed driver exhibits low noise and high modulation bandwidth.
Excellent long-term stability and precise set-point repeatability were achieved.
Digital control via a microprocessor unit significantly improved accuracy and stability.

Conclusions:

The novel laser current driver design offers superior performance compared to traditional methods.
Remote digital control enhances laser system precision, stability, and ease of use.
This driver is suitable for applications demanding high-performance laser current control.