Double clad tubular anti-resonant hollow core fiber for nonlinear microendoscopy
Alexandre Kudlinski, Andy Cassez, Olivier Vanvincq, Dylan Septier, Aymeric Pastre, Rémi Habert, Karen Baudelle, M. Douay, Vasyl Mytskaniuk, Viktor Tsvirkun, Hervé Rigneault, Géraud Bouwmans
Abstract
We report the fabrication and characterization of the first double clad tubular anti-resonant hollow core fiber. It allows to deliver ultrashort pulses without temporal nor spectral distortions in the 700-1000 nm wavelength range and to efficiently collect scattered light in a high numerical aperture double clad. The output fiber mode is shaped with a silica microsphere generating a photonic nanojet, making it well suitable for nonlinear microendoscopy application. Additionally, we provide an open access software allowing to find optimal drawing parameters for the fabrication of tubular hollow core fibers.