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25 May 2022 Integration of Mach-Zehnder interferometer on optical fiber using UV femtosecond laser pulses
Kamilė Kasačiūnaitė, Simas Butkus, Domas Paipulas
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Proceedings Volume 12142, Fiber Lasers and Glass Photonics: Materials through Applications III; 121421B (2022) https://doi.org/10.1117/12.2621949
Event: SPIE Photonics Europe, 2022, Strasbourg, France
Abstract
In this study, we present results on direct fiber surface ablation using UV femtosecond laser pulses (206 nm, 50 kHz, 210 fs). The research is carried out experimentally and simulatively. The simulative experiment demonstrates that fringe visibility is best when half of the fiber core is removed. The fringe free spectral range (FSR) decreases as the trench length increases. The experimental study contains the investigation on parameter optimization for trench-like surface formation on the fiber via direct laser ablation, suitable for Mach – Zehnder interferometer (MZI) formation. Linear light absorption allows to fabricate deep, regular structures on the fibers with small (148 ± 12 nm) bottom surface roughness.
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Kamilė Kasačiūnaitė, Simas Butkus, and Domas Paipulas "Integration of Mach-Zehnder interferometer on optical fiber using UV femtosecond laser pulses", Proc. SPIE 12142, Fiber Lasers and Glass Photonics: Materials through Applications III, 121421B (25 May 2022); https://doi.org/10.1117/12.2621949
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KEYWORDS
Optical fibers
Femtosecond phenomena
Ultraviolet radiation
Surface roughness
Laser ablation
Mach-Zehnder interferometers
Interferometers
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