Experimental Investigation of optical fiber Fabry-Perot resonators: resonance enhancement through reflective coatings and concave mirrors

Monika Halendy; Joanna Korec-Kosturek; Slawomir Ertman; Piotr Lesiak; Tomasz R. Woliński

doi:10.1117/12.3029563

20 June 2024 Experimental Investigation of optical fiber Fabry-Perot resonators: resonance enhancement through reflective coatings and concave mirrors

Monika Halendy, Joanna Korec-Kosturek, Slawomir Ertman, Piotr Lesiak, Tomasz R. Woliński

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Proceedings Volume 13001, Specialty Optical Fibres VIII; 130010M (2024) https://doi.org/10.1117/12.3029563
Event: SPIE Photonics Europe, 2024, Strasbourg, France

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Abstract

In this study, experimental investigation of fiber-based Fabry-Perot is compared against the theoretical predictions of Fabry-Perot resonators. The special emphasis in this study was placed on testing the perspectives for resonance enhancement by coating the fiber facets by highly reflective surfaces and by replacing the flat surfaces by concave mirrors fabricated by the Two-Photon Polymerization (2PP) 3D nano-printing method. Golden layers of varying thickness were deposited on both flat and concave mirrors of optical fiber Fabry-Perot resonators, which were constructed from simply two optical fiber tips carefully aligned parallel to each other. An improvement of extinction ratio by even 12.5 dB and higher finesse of the resonance signal was registered. The resonance spectra resulting from such modifications were measured and discussed in relation to the assumptions of the theory for free-space Fabry-Perot resonators. It was demonstrated that the most optimal reflectance (R) values of both mirrors for the standard Fabry-Perot cavities (R1 = R2) are not the most optimal in case of fiber Fabry-Perot cavities.

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Monika Halendy, Joanna Korec-Kosturek, Slawomir Ertman, Piotr Lesiak, and Tomasz R. Woliński "Experimental Investigation of optical fiber Fabry-Perot resonators: resonance enhancement through reflective coatings and concave mirrors", Proc. SPIE 13001, Specialty Optical Fibres VIII, 130010M (20 June 2024); https://doi.org/10.1117/12.3029563

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