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Related Concept Videos

Standing Waves in a Cavity01:28

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:

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Related Experiment Video

Updated: May 20, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

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Published on: October 13, 2017

Note: a monolithic filter cavity for experiments in quantum optics.

Pantita Palittapongarnpim1, Andrew MacRae, A I Lvovsky

  • 1Department of Physics and Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada.

The Review of Scientific Instruments
|July 5, 2012
PubMed
Summary
This summary is machine-generated.

Researchers created a stable monolithic Fabry-Perot cavity for quantum optics. This narrow band filter uses thermal expansion for tuning and requires no optical locking, achieving 45dB mode suppression.

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Last Updated: May 20, 2026

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Area of Science:

  • Quantum Optics
  • Optical Engineering
  • Materials Science

Background:

  • Fabry-Perot cavities are crucial for narrow band filtering in quantum optics.
  • Existing methods often require complex optical locking techniques for stability.
  • Developing monolithic, stable cavities is essential for advanced optical experiments.

Purpose of the Study:

  • To develop a stable, monolithic Fabry-Perot cavity for use as a narrow band filter.
  • To demonstrate a tunable cavity using thermal expansion, eliminating the need for optical locking.
  • To characterize the filter performance in terms of mode suppression and transmission.

Main Methods:

  • Coating a commercial plano-convex lens on both sides with high-reflectivity dielectric layers to form a monolithic cavity.
  • Utilizing thermal expansion of the cavity for resonant frequency selection and tuning.
  • Characterizing the optical filter performance using standard optical measurement techniques.

Main Results:

  • A stable monolithic Fabry-Perot cavity was successfully produced.
  • The cavity demonstrated effective narrow band filtering with 45dB suppression of unwanted modes.
  • A transmission of 60% was maintained for the desired optical modes.

Conclusions:

  • The developed monolithic Fabry-Perot cavity is a stable and effective narrow band filter for quantum optics.
  • Thermal expansion tuning simplifies the system, removing the need for complex optical locking.
  • This approach offers a robust solution for high-performance optical filtering.