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

Standing Waves in a Cavity

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

Effects of feedback

Effects of feedback

Feedback in control systems plays a critical role in shaping various operational parameters, extending beyond simple error reduction to influence stability, bandwidth, gain, impedance, and sensitivity. Understanding these effects requires examining a basic feedback system characterized by defined input, output, error, and feedback signals.
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...

You might also read

Related Articles

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

Sort by

Same author

Brassinosteroid signaling regulates shoot apical meristem homeostasis via orchestrating cytokinin and WUSCHEL activity.

Science advances·2026

Same author

Genomics meets metabolomics: decoding <i>Arnebia tschimganica</i> and the shikonin biosynthesis pathway.

Horticulture research·2026

Same author

Multi-Organ RNA Virome Profiling of Edible Rodents Reveals Potential Zoonotic Viral Exposure at the Wildlife-Livestock-Human Interface in Southwest China.

Pathogens (Basel, Switzerland)·2026

Same author

Spatially Resolved Molecular Subtyping Uncovers Tumor Progression and Immune Evasion Mechanisms in High-Grade Serous Ovarian Cancer.

Cancer research·2026

Same author

High-Sensitivity Graphene/2D Perovskite Hybrid Photodetector for Visible-Light Sensing on Silicon Nitride Photonic Integrated Platform.

ACS nano·2026

Same author

Reimagining plant science training in the era of generative artificial intelligence: a global perspective.

The Plant cell·2026

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: Jun 29, 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

Instabilities in a grating feedback external cavity semiconductor laser.

Dijun Chen¹, Zujie Fang, Haiwen Cai

¹Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.

|October 15, 2008

Summary

This summary is machine-generated.

Chaotic self-pulsation and spectral changes were observed in a Littman configuration diode laser. These phenomena, linked to mode competition, offer insights into semiconductor laser instability.

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

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Related Experiment Videos

Last Updated: Jun 29, 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

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Area of Science:

Optics and Photonics
Semiconductor Physics
Nonlinear Dynamics

Background:

Diode lasers with external cavities are crucial for tunable laser applications.
Understanding output power fluctuations is key to stable laser operation.
Littman configuration lasers are known for their tunability and spectral properties.

Purpose of the Study:

To investigate the chaotic behaviors and output power fluctuations in a Littman configuration grating external cavity diode laser.
To analyze the spectral characteristics and P-N junction voltage behavior during self-pulsation.
To explore the underlying mechanisms of chaotic instability in strongly filtered feedback semiconductor lasers.

Main Methods:

Experimental observation of output power fluctuations in a Littman external cavity diode laser.
Analysis of spectral characteristics during self-pulsation events.
Monitoring of P-N junction voltage during laser operation.

Main Results:

Peculiar chaotic self-pulsation behaviors were observed at the L-I curve kink points.
Distinct spectral characteristics with multiple peaks were identified during self-pulsation.
P-N junction voltage jumps were found to synchronize with the self-pulsation.

Conclusions:

The observed phenomena indicate competition between longitudinal modes and transient variations in transverse modes.
These results provide valuable insights into the mechanisms driving chaotic instability in semiconductor lasers with strong feedback.
Further research into these instabilities can lead to improved laser design and control.