Supercontinuum generation in the black light region by pumping at 355 nm a silica photonic crystal fiber

T. Sylvestre; A. R. Ragueh; M. W. Lee; B. Stiller; G. Fanjoux; B. Barviau; A. Mussot; A. Kudlinski

doi:10.1117/12.922769

16 May 2012 Supercontinuum generation in the black light region by pumping at 355 nm a silica photonic crystal fiber

T. Sylvestre, A. R. Ragueh, M. W. Lee, B. Stiller, G. Fanjoux, B. Barviau, A. Mussot, A. Kudlinski

Proceedings Volume 8434, Nonlinear Optics and Applications VI; 843415 (2012) https://doi.org/10.1117/12.922769
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

Abstract

We have developed a fibre-based source of "black light", a source that emits broadband ultraviolet radiation but only small amounts of visible light and no infrared light. We made this source by pumping a specially designed silica photonic crystal fibre with 355 nm light pulses from a Q-switched frequency-tripled Nd:YAG laser. Four-wave mixing and cascaded Raman generation combine in the fibre to provide a broadband continuum output that spans from around 350 nm to 390-470 nm, with the exact spectral width dependent on the pump power. We discuss the main limitations in terms of bandwidth and power due to temporal walk-off, fiber attenuation and solarization and we suggest simple solutions for further progress. This broadband black-light source could be useful for performing gas absorption spectroscopy or exciting various fluorescent proteins used in biological studies.

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T. Sylvestre, A. R. Ragueh, M. W. Lee, B. Stiller, G. Fanjoux, B. Barviau, A. Mussot, and A. Kudlinski "Supercontinuum generation in the black light region by pumping at 355 nm a silica photonic crystal fiber", Proc. SPIE 8434, Nonlinear Optics and Applications VI, 843415 (16 May 2012); https://doi.org/10.1117/12.922769

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