Absorption coefficients and scattering losses of TGG, TGP, KTF, FS, and CeF3 magneto-optical crystals in the visible via cavity ring-down spectroscopy

We demonstrate a method for determining small absorption coefficients and surface-scattering losses of crystals using cavity ring-down spectroscopy and perform measurements on magneto-optical crystals of terbium gallium garnet (TGG), terbium gallium phosphate (TGP), fused silica (FS), potassium terb...

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Bibliographic Details
Published in:Applied optics (2004) 2023-10, Vol.62 (29), p.7730
Main Authors: Xygkis, Michalis, Linaraki, Artemis N, Toutoudaki, Eirini N, Katsoprinakis, Georgios E, Rakitzis, T Peter
Format: Article
Language:English
Subjects:
Absorptivity
Cavity ringdown
Crystals
Figure of merit
Fused silica
Gallium phosphate
Scattering
Surface chemistry
Terbium
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Summary:We demonstrate a method for determining small absorption coefficients and surface-scattering losses of crystals using cavity ring-down spectroscopy and perform measurements on magneto-optical crystals of terbium gallium garnet (TGG), terbium gallium phosphate (TGP), fused silica (FS), potassium terbium fluoride (KTF), and CeF3 at 532 and 634 nm. Surface scattering is distinguished from absorption losses by using crystals of different lengths. A figure of merit (FoM) for magneto-optical crystals is defined to evaluate their suitability as intracavity optics in optical cavity applications. It is found that TGP has the highest FoM for crystal lengths up to ∼10mm , whereas CeF3 and FS potentially outperform TGP for longer crystals. Single-pass applications are also briefly discussed.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.496780