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$Interference and Diffraction$ 02:18

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.

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Related Experiment Video

Updated: Jun 6, 2026

Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon

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Multiplex Fabry-Perot interferometer: I. Theory.

W B Cook, H E Snell, P B Hays

|November 10, 2010

Summary

This summary is machine-generated.

The Multiplex Fabry-Perot Interferometer (MFPI) combines Michelson and Fabry-Perot capabilities for high-resolution, broad-bandwidth spectroscopy. This compact instrument offers a novel approach to spectral analysis.

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Area of Science:

Optical Physics
Spectroscopy
Instrument Development

Background:

Traditional interferometers like Michelson and Fabry-Perot have limitations in spectral bandwidth, resolution, and size.
Achieving high resolution typically requires large instruments or narrow spectral ranges.

Purpose of the Study:

To introduce and describe the operating theory of the Multiplex Fabry-Perot Interferometer (MFPI).
To highlight the MFPI's advantages over conventional Michelson and Fabry-Perot interferometers.

Main Methods:

The MFPI utilizes a large scanning distance (centimeters) within a Fabry-Perot structure.
Recorded signals are Fourier transformed, similar to Michelson interferometry, to generate spectral data.

Main Results:

The MFPI achieves high spectral resolution over a moderately large optical bandwidth.
It offers a significantly smaller footprint compared to Michelson interferometers with equivalent resolution.
It provides broader bandwidth coverage than conventional Fabry-Perot setups.

Conclusions:

The MFPI is a versatile and compact spectroscopic instrument.
It successfully integrates the strengths of both Michelson and Fabry-Perot interferometers.
The MFPI presents a valuable new tool for spectroscopic applications requiring high resolution and broad bandwidth.