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10 March 2020 Harnessing femtosecond laser filaments for nano-structuring of "Lab-in-Fibre" sensors and "Spectrometer-in-Fibre" microsystems (Conference Presentation)
Peter R. Herman, Ehsan Alimonhammadian, Keivan M. Aghdami, Erden Ertorer, Young Hwan Kim, Jianzhao Li, Abdullah Rahnama
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Proceedings Volume 11292, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XIII; 1129202 (2020) https://doi.org/10.1117/12.2551249
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
Beam shaping of femtosecond lasers was applied in the Kerr-lensing and aberration regime to enable high-aspect-ratio filament tracks to form uniformly through the silica cladding and core waveguide of single-mode fiber (SMF28/450). One- and two-dimensional filament arrays were embedded along the waveguide to form weak to strong photonic stopbands. The filament shape enhanced transverse light scattering into narrow azimuthal radiation zones. Tailoring of chirp and 2D patterns further facilitated high-resolution (~350 pm) spectral focusing onto a CCD camera, defining a compact “Spectrometer-in-fibre” over the visible spectrum. At higher exposure, the filaments opened into narrow nano-channels (200-400 nm diameter) presenting a novel Bragg grating for refractive index sensing of the ambient environment. This lab-in-fiber technology presents a robust, flexible, and ubiquitous communication platform for nano-scale sensing across expansive networks or into tightly confined, sinuous spaces.
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Peter R. Herman, Ehsan Alimonhammadian, Keivan M. Aghdami, Erden Ertorer, Young Hwan Kim, Jianzhao Li, and Abdullah Rahnama "Harnessing femtosecond laser filaments for nano-structuring of "Lab-in-Fibre" sensors and "Spectrometer-in-Fibre" microsystems (Conference Presentation)", Proc. SPIE 11292, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XIII, 1129202 (10 March 2020); https://doi.org/10.1117/12.2551249
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KEYWORDS
Femtosecond phenomena
Microsystems
Sensors
Spectroscopy
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