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13 May 2019 Generation of multiwavelength light pulses by femtosecond Bessel laser beam in silica glass (Conference Presentation)
Weiwei Liu
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Proceedings Volume 11026, Nonlinear Optics and Applications XI; 1102605 (2019) https://doi.org/10.1117/12.2520861
Event: SPIE Optics + Optoelectronics, 2019, Prague, Czech Republic
Abstract
When near infrared femtosecond Bessel laser beam (fs-BLB) is obliquely incident on the silica surface, annular beams (ABs) with bandwidths of several tens of nanometers and different peak wavelengths in visible range are generated simultaneously. It is considered that four-wave mixing (FWM) and corresponding cascaded parametric processes are responsible for the generation of multi-wavelength ABs. It has also been found that the generation efficiency is significantly enhanced by the resonance absorption of the silica glass. Since the diffraction angles of these colorful ABs mainly depend on their wavelengths and is insensitive to the input laser energy, this technique may find important applications where multi-wavelength ultrashort pulses are needed, such as multidimensional multiplexing optical communications, optical sensing, and pump-probe measurements. Besides, they are also expected to be used as heralded photon source integrated into the quantum information system.
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Weiwei Liu "Generation of multiwavelength light pulses by femtosecond Bessel laser beam in silica glass (Conference Presentation)", Proc. SPIE 11026, Nonlinear Optics and Applications XI, 1102605 (13 May 2019); https://doi.org/10.1117/12.2520861
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KEYWORDS
Silica
Femtosecond phenomena
Glasses
Resonance enhancement
Absorption
Diffraction
Four wave mixing
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