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Tunable optical filter for colorimetric applications.

N J Goddard, A E Maturell

|November 10, 2010

Summary

This summary is machine-generated.

Researchers developed a novel tunable optical filter using glass fibers and the Christiansen effect. This temperature-controlled device operates in the visible spectrum, offering adjustable peak wavelengths for various applications.

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Area of Science:

Optics
Materials Science

Background:

The Christiansen effect describes the phenomenon where the refractive indices of two materials become equal at a specific temperature, leading to increased transmission.
Traditional filters based on the Christiansen effect often use solid particles, which can limit tunability and performance.

Purpose of the Study:

To fabricate and characterize a temperature-controlled tunable optical filter utilizing glass fibers instead of solid particles.
To investigate the transmission properties of this novel filter design within the visible spectrum.

Main Methods:

Fabrication of a tunable optical filter by substituting solid particles with glass fibers.
Experimental testing of the filter's performance under controlled temperature conditions.
Analysis of transmission spectra, including peak wavelength, peak transmission, and full width at half maximum (FWHM).

Main Results:

The fabricated filter demonstrated temperature-controlled tunability in the visible range.
At an operating temperature of 95°C, the filter exhibited a peak wavelength of 509.5 nm.
The filter achieved a peak transmission of 50.8% with a FWHM of 71 nm at 95°C.

Conclusions:

The use of glass fibers in a Christiansen effect-based filter is feasible and allows for temperature-controlled optical tuning.
This novel filter design shows potential for applications requiring adjustable optical filtering in the visible spectrum.