Analysis of supercontinuum generated with endlessly single mode new type of microstructured fibre series with near-visible zero dispersion wavelength

Zbigniew Holdynski; Marek Napierala; Urszula A. Laudyn; Miroslaw A. Karpierz; Michal Szymanski; Michal Murawski; Pawel Mergo; Pawel Marc; Leszek R. Jaroszewicz; Tomasz Nasilowski

doi:10.1117/12.2039485

7 March 2014 Analysis of supercontinuum generated with endlessly single mode new type of microstructured fibre series with near-visible zero dispersion wavelength

Zbigniew Holdynski, Marek Napierala, Urszula A. Laudyn, Miroslaw A. Karpierz, Michal Szymanski, Michal Murawski, Pawel Mergo, Pawel Marc, Leszek R. Jaroszewicz, Tomasz Nasilowski

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Proceedings Volume 8961, Fiber Lasers XI: Technology, Systems, and Applications; 896138 (2014) https://doi.org/10.1117/12.2039485
Event: SPIE LASE, 2014, San Francisco, California, United States

Abstract

Fundamental properties of pure silica microstructured fibres (MSFs) can be determined by their geometrical crosssection design. Investigation of nonlinear effects was widely evaluated in diverse types of MSFs with exactly defined dispersive properties. Proper design of Zero Dispersion Wavelength (ZDW) strongly influences generation of nonlinear processes resulting especially in supercontinuum generation (SC). ZDW shift to short wavelengths together with high nonlinearity (small effective mode area) can be obtained by dramatic decrease of microstructured fibre pitch and increase of air-filling ratio. Fibre geometry must be properly scaled preserving technological tolerances to obtain precisely defined position of ZDW near visible range. Additionally, higher air-filling ratio results in multimode guiding regime. Therefore, in the paper we present studies of novel type of fibre geometry with ZDW near visible range together with endlessly single mode propagation regime. Chromatic dispersion measurements and ZDW analysis are performed with use of interferometric method. Presented MSFs series (the same structure type, but different ZDW position) is manufactured by stack and draw method. Proposed MSFs geometry enables fabrication of desired chromatic dispersion characteristic while respecting all technological tolerances, which is very difficult in case of manufacturing typical photonic crystal fibres for supercontinuum generated with 780 nm wavelength pulses from titanium-sapphire laser. Additionally, proposed endlessly single mode operation provides high quality white light output beam, simultaneously with stable and flat SC source. Paper also reports on the SC generation with pumping in the anomalous and normal side of chromatic dispersion with femtoseconds and picoseconds pulses.

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Zbigniew Holdynski, Marek Napierala, Urszula A. Laudyn, Miroslaw A. Karpierz, Michal Szymanski, Michal Murawski, Pawel Mergo, Pawel Marc, Leszek R. Jaroszewicz, and Tomasz Nasilowski "Analysis of supercontinuum generated with endlessly single mode new type of microstructured fibre series with near-visible zero dispersion wavelength", Proc. SPIE 8961, Fiber Lasers XI: Technology, Systems, and Applications, 896138 (7 March 2014); https://doi.org/10.1117/12.2039485

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KEYWORDS

Dispersion

Manufacturing

Femtosecond phenomena

Tolerancing

Optical fibers

Silica

Supercontinuum generation

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