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

Linear Approximation in Frequency Domain

Linear Approximation in Frequency Domain

Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear.

Reconstruction of Signal using Interpolation

Reconstruction of Signal using Interpolation

Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next sampling...

Doppler Effect - II

Doppler Effect - II

The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...

Linear Approximation in Time Domain

Linear Approximation in Time Domain

Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length, the...

Doppler Effect - I

Doppler Effect - I

The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted experiments with both moving sources and moving observers. Consider an observer standing on a street corner, observing an ambulance with a siren sound passing by at a constant speed. The observer experiences two characteristic changes in the sound of the siren. Initially, the sound increases in loudness as the ambulance approaches and decreases in...

Differential Leveling

Differential Leveling

Differential leveling is a precise method in surveying used to determine the elevation difference between two points. Its primary goal is to establish accurate vertical measurements to create level surfaces or grade lines critical for designing and constructing infrastructures such as roads, bridges, and buildings.The procedure for differential leveling begins with setting up and leveling the instrument at a point where the benchmark can be seen. The level rod is held on the benchmark (BM), and...

You might also read

Related Articles

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

Sort by

Same author

Ultrasound Biomicroscopic Evaluation of Postoperative Anterior Segment Changes in Canine Intumescent Cataracts.

Veterinary ophthalmology·2026

Same author

Fully automated centrifugal microfluidic system for self-calibrating isothermal nucleic acid quantification.

Biosensors & bioelectronics·2026

Same author

Evolving national dementia policies in the OECD: Prevention, diagnosis, and care.

Alzheimer's & dementia : the journal of the Alzheimer's Association·2026

Same author

Optic neuritis and meningoencephalitis associated with an ovarian teratoma in a dog.

Journal of veterinary internal medicine·2026

Same author

The impact of physical activity on the psychological wellbeing and study abroad satisfaction of Chinese international students in a cross-cultural context.

BMC public health·2026

Same author

Rhesus macaques with an <i>OPA1</i> mutation demonstrate features of autosomal dominant optic atrophy.

Proceedings of the National Academy of Sciences of the United States of America·2026

Search research articles

Related Experiment Video

Updated: Jun 17, 2026

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Published on: April 4, 2017

A passive method to compensate nonlinearity in a homodyne interferometer.

Jeongho Ahn¹, Jong-Ahn Kim, Chu-Shik Kang

¹Division of Mechanical Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon, 305-701, Republic of Korea.

|January 7, 2010

Summary

A new method corrects nonlinearity in homodyne interferometers caused by polarization crosstalk. By realigning wave plates, nonlinearity is reduced from 3.75 nm to 0.36 nm, improving measurement accuracy.

More Related Videos

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

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Related Experiment Videos

Last Updated: Jun 17, 2026

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Published on: April 4, 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

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Area of Science:

Optics and Photonics
Interferometry
Metrology

Background:

Polarization crosstalk in optical components like polarizing beam splitters (PBS) and wave plates (WP) introduces nonlinearity in homodyne interferometers.
This nonlinearity can significantly degrade the precision of optical measurements.

Purpose of the Study:

To analyze the nonlinearity arising from polarization crosstalk in homodyne interferometers.
To develop and present a novel compensation method for suppressing this nonlinearity.

Main Methods:

Theoretical analysis of polarization crosstalk effects in PBS and WP.
Introduction of a new compensation technique involving specific realignment angles for wave plate axes based on PBS characteristics.

Main Results:

The proposed method effectively suppresses nonlinearity in homodyne interferometers.
Achieved nonlinearity of 0.36 nm, a substantial improvement over the 3.75 nm observed with conventional alignment methods.

Conclusions:

The developed wave plate realignment technique offers a significant advancement in reducing nonlinearity in homodyne interferometers.
This method enhances the accuracy and reliability of measurements performed using such interferometric systems.