Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
Effects of feedback01:24

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...
Interference: Path Lengths01:10

Interference: Path Lengths

Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...

You might also read

Related Articles

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

Sort by
Same author

Tuning of Bloch modes, diffraction, and refraction by two-dimensional lattice reconfiguration.

Optics letters·2010
Same author

[Construction of DNA vaccine pcDNA3.1(+)/tetraspanin 2-A against Schistosoma japonicum and its immune-protective effect in mice].

Zhongguo ji sheng chong xue yu ji sheng chong bing za zhi = Chinese journal of parasitology & parasitic diseases·2010
Same author

Fluorescence-enhanced organogels and mesomorphic superstructure based on hydrazine derivatives.

Langmuir : the ACS journal of surfaces and colloids·2010
Same author

Cancer-derived mutations in the fibronectin III repeats of PTPRT/PTPrho inhibit cell-cell aggregation.

Cell communication & adhesion·2010
Same author

Simulation of wavelength conversion based on integrated saturable absorber.

Applied optics·2010
Same author

Traditional Chinese medicine in the treatment of rheumatoid arthritis: a general review.

Rheumatology international·2010

Related Experiment Video

Updated: May 30, 2026

Research Application of Laser-Induced Shock Wave for Studying Blast-Induced Cochlear Injury
05:44

Research Application of Laser-Induced Shock Wave for Studying Blast-Induced Cochlear Injury

Published on: March 1, 2024

Fringe abnormality induced by the external interference effect in laser feedback.

Peng Zhang1, Shulian Zhang, Yidong Tan

  • 1State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing, China.

Applied Optics
|August 12, 2011
PubMed
Summary

Abnormal laser feedback fringes, caused by optical element interference, were investigated. Solutions were found to achieve normal feedback fringes with consistent waveform and phase.

More Related Videos

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
09:10

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light
09:19

Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light

Published on: July 29, 2013

Related Experiment Videos

Last Updated: May 30, 2026

Research Application of Laser-Induced Shock Wave for Studying Blast-Induced Cochlear Injury
05:44

Research Application of Laser-Induced Shock Wave for Studying Blast-Induced Cochlear Injury

Published on: March 1, 2024

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
09:10

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light
09:19

Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light

Published on: July 29, 2013

Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Experimental Physics

Background:

  • Feedback fringes in laser systems are critical for performance monitoring.
  • Abnormalities in feedback fringes can indicate underlying optical issues.
  • Understanding fringe behavior is essential for laser stability and application.

Purpose of the Study:

  • To investigate the causes of abnormal feedback fringe phenomena in laser systems.
  • To analyze waveform deformation and phase abnormalities in feedback fringes.
  • To develop methods for achieving normal feedback fringe characteristics.

Main Methods:

  • Experimental detection and analysis of feedback fringes in primary and rear laser output.
  • Computational modeling to understand interference and signal superposition effects.
  • Implementation of corrective approaches to mitigate abnormal fringe phenomena.

Main Results:

  • Abnormal feedback fringes, characterized by waveform deformation and phase shifts, were identified.
  • Interference and signal superposition from external cavity optical elements were determined as primary causes.
  • Successful implementation of approaches led to the attainment of normal feedback fringes.

Conclusions:

  • Optical elements in the external cavity are significant sources of feedback fringe abnormalities.
  • Effective methods can be employed to eliminate these abnormalities.
  • Achieving normal feedback fringes ensures consistent laser performance across detection points.