NDLI: Generation of UV light from microstructured fibers pumped with femtosecond 800 nm oscillator

Content Provider	IEEE Xplore Digital Library
Author	Efimov, A. Omenetto, F.G. Taylor, A.J. Knight, J.C. Wadsworth, W.J. Russel, P.St.J.
Copyright Year	2002
Description	Author affiliation: Los Alamos Nat. Lab., NM, USA (Efimov, A.; Omenetto, F.G.; Taylor, A.J.)
Abstract	Summary form only given. We report the observation of the upconversion of the femtosecond 800 nm pulses from a commercial Ti:sapphire oscillator to the UV frequency range. It is unambiguously observed that the nonlinear mechanism is distinct from that of the supercontinuum generation and the UV generation occurs starting from the higher-order mode at the fundamental wavelength and yielding a very high-order mode in the UV. The efficiency of the UV generation was found to be strongly dependent on the polarization of the fundamental and varied between experiments. These findings strongly suggest that launching the fundamental light into a higher-order mode was critical for the process. The aforementioned threshold corresponds to the melting of the fiber tip after which the tip is no longer flat but rather works as a phase mask for the coupling of the input light. Such a mask decreases the efficiency of the fundamental mode excitation leading to the disappearance of the supercontinuum and increases the efficiency of higher-mode excitation which results in the UV generation through phase matching to even higher-order modes.
Sponsorship	IEEE/Lasers & Electro-Opt. Soc. OSA-Opt. Soc. America Quantum Electron. Div. Eur. Phys. Soc. Opt. Soc. Japanese Quantum Electron. Joint Group
Starting Page	488
Ending Page	489
File Size	249474
Page Count	2
File Format	PDF
ISBN	1557527067
DOI	10.1109/CLEO.2002.1034237
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-05-24
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Optical Soc. of America
Subject Keyword	Optical fiber polarization Optical fibers Photonic crystal fibers Fiber nonlinear optics Ultrafast optics Oscillators Physics Pump lasers Fiber lasers Optical control
Content Type	Text
Resource Type	Article

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