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

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Holographic Fabry-Perot spectrometer.

O Martínez-Matos¹, José A Rodrigo, P Vaveliuk

¹Departamento de Optica, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Madrid, Spain. omartine@fis.ucm.es

|February 18, 2011

Summary

We developed a holographic Fabry-Perot spectrometer (HFPS) that doubles resolving power and halves the free spectral range. This novel design offers high efficiency and environmental stability for advanced spectral analysis.

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Area of Science:

Optics and Photonics
Spectroscopy
Holography

Background:

Fabry-Perot etalons are widely used for high-resolution spectroscopy.
Conventional etalons can be sensitive to environmental factors like temperature and vibrations.
Improving the performance and stability of etalon-based spectrometers is crucial for scientific applications.

Purpose of the Study:

To propose and analytically investigate a novel holographic Fabry-Perot spectrometer (HFPS).
To compare the performance of the HFPS with conventional Fabry-Perot etalons.
To explore a variant of the HFPS utilizing holographic multiplexing.

Main Methods:

Analytical investigation of the spectral response in the paraxial approximation.
Comparison of HFPS characteristics with conventional Fabry-Perot etalons.
Theoretical analysis of a multiplexed HFPS variant.

Main Results:

The holographic Fabry-Perot spectrometer (HFPS) demonstrates twice the resolving power of conventional etalons.
The free spectral range (FSR) of the HFPS is reduced to one-half.
A multiplexed HFPS variant was analyzed, showing increased FSR while maintaining HFPS performance.

Conclusions:

The proposed HFPS offers significant improvements in resolving power and stability.
The HFPS is insensitive to environmental conditions such as temperature and vibrations.
The holographic multiplexing approach provides a method to increase FSR without compromising spectral resolution.