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....

You might also read

Related Articles

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

Sort by

Same author

Interface profilometry with third harmonic generation microscopy.

Optics express·2026

Same author

Application of bimetallic gold-platinum nanoparticles in optical fiber sensors for pesticide detection.

RSC advances·2026

Same author

High-resolution 3D imaging of diamonds with multiphoton microscopy.

Applied optics·2026

Same author

Label-free multiphoton microscopy with a visible femtosecond laser.

Optics express·2025

Same author

Fifth-harmonic and five-photon excitation fluorescence multiphoton microscopy.

Optics letters·2025

Same author

A Brain-Permeable Aminosterol Regulates Cell Membranes to Mitigate the Toxicity of Diverse Pore-Forming Agents.

ACS chemical neuroscience·2022

Same journal

Denoising algorithm of Φ-OTDR systems based on adaptive fractional wavelet transform denoising.

Optics express·2026

Same journal

Millisecond photon-to-photon latency and high-speed volumetric projection system for optogenetics.

Optics express·2026

Same journal

Polarization-encoded coaxial structured light for high-precision 3D surface profilometry.

Optics express·2026

Same journal

Discrete freeform optical design based on collaborative optimization of point cloud and local normals.

Optics express·2026

Same journal

Ultrafast ghost imaging with 25 GHz speckle switching and wavelength-division multiplexing.

Optics express·2026

Same journal

Atomic vapor cells fabricated by femtosecond laser welding of standard-optical-quality glass.

Optics express·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Sep 11, 2025

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Nonlinear frequency conversion using common optical coatings and applications.

Joshua H Magnus, Lam T Nguyen, Khanh Q Kieu

|August 13, 2025

Summary

This summary is machine-generated.

Optical coatings on filters and mirrors generate nonlinear signals like third harmonic generation (THG). Some coatings show high THG efficiency with low laser energy, enabling advanced optical phenomena.

More Related Videos

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

Published on: May 27, 2013

Related Experiment Videos

Last Updated: Sep 11, 2025

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

Published on: May 27, 2013

Area of Science:

Nonlinear optics
Materials science

Background:

Optical coatings are crucial for laser systems, but their nonlinear optical properties are often overlooked.
Understanding nonlinear signal generation in coatings is key for advanced optical applications.

Purpose of the Study:

To investigate nonlinear signal generation from various optical coatings.
To quantify the efficiency of third harmonic generation (THG) in common optical filters and mirrors.
To explore other nonlinear phenomena like fifth harmonic generation and interferometric autocorrelation using these coatings.

Main Methods:

Utilized femtosecond laser pulses to excite optical coatings on filters and mirrors.
Measured nonlinear optical signals, focusing on third harmonic generation (THG).
Demonstrated advanced nonlinear techniques including third order interferometric autocorrelation and fifth harmonic generation.

Main Results:

Identified third harmonic generation (THG) as the prevalent nonlinear signal.
Observed surprisingly high THG conversion efficiencies (>10^-4) with modest laser pulse energies (∼6 nJ).
Successfully demonstrated fifth harmonic generation, interferometric autocorrelation, and non-collinear sum frequency generation.

Conclusions:

Optical coatings on standard filters and mirrors can be efficient sources of nonlinear optical signals.
These findings open possibilities for novel applications using readily available optical components.
The high THG efficiency suggests potential for integrated nonlinear optical devices.