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IR Spectrometers

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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...

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Determination of a Fabry-Perot multipass interferometer instrumental function.

J M Alvarez, J A Valles

|June 18, 2010

Summary

This summary is machine-generated.

This study theoretically determines the instrumental function of a Fabry-Perot multipass interferometer based on its single pass function. Experimental validation confirms the derived polynomial relationships for interferometer characterization.

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Area of Science:

Optics and Photonics
Interferometry

Background:

Fabry-Perot interferometers are crucial optical devices.
Understanding their instrumental function is key for precise measurements.
Multipass configurations enhance performance but complicate analysis.

Purpose of the Study:

To theoretically derive the instrumental function of a multipass Fabry-Perot interferometer.
To establish the relationship between multipass and single pass instrumental functions.
To provide a method for characterizing complex interferometers.

Main Methods:

Theoretical analysis of optical path folding in multipass systems.
Derivation of functional dependencies using mathematical modeling.
Experimental verification using a physical interferometer setup.

Main Results:

Established polynomial relationships between single pass and multipass instrumental functions.
Quantified the impact of multiple passes on the overall instrumental profile.
Experimental data showed strong agreement with theoretical predictions.

Conclusions:

The theoretical model accurately predicts the instrumental function of multipass Fabry-Perot interferometers.
The derived relationships offer a practical tool for interferometer design and calibration.
This work validates the theoretical approach through experimental evidence.