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Proceedings Paper

Generation and diagnosis of focused ultrashort pulses of complex light
Author(s): J. Strohaber; I. Mariyenko; Cornelis J. Uiterwaal
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Paper Abstract

We present our current efforts to create pure transversal modes in ultrashort and intense pulses of 800 nm radiation (Ti:sapphire). Our longer-term goal is to investigate if and how optical orbital angular momentum affects intense-field excitation and ionization processes. For this purpose we need strong pulses in pure modes. Optical orbital angular momentum is present in Laguerre-Gaussian modes; in the past, we established a technique to create spatial-chirp free pure Laguerre-Gaussian modes using a pair of holographic gratings on film [Opt. Express 13, 7599-7608 (2005)]. However, this technique is unsuitable for high intensity beams, and we are currently exploring the possibilities of a liquid-crystal spatial light modulator (SLM). After careful testing, we have found that our SLM, which we operate as a phase plate, withstands without any problem the full 1010 W/cm2 peak intensity of an amplified pulsed Ti:sapphire beam (< 50 fs pulse duration, repetition rate 1 kHz). Using the SLM, we have recently created a beam of ultrashort and intense pulses with a Hermite-Gaussian(1,0) profile and started to analyze this beam using optical and ionization methods.

Paper Details

Date Published: 9 February 2007
PDF: 9 pages
Proc. SPIE 6483, Complex Light and Optical Forces, 64830M (9 February 2007); doi: 10.1117/12.701711
Show Author Affiliations
J. Strohaber, Univ. of Nebraska-Lincoln (United States)
I. Mariyenko, Univ. of Nebraska-Lincoln (United States)
Cornelis J. Uiterwaal, Univ. of Nebraska-Lincoln (United States)


Published in SPIE Proceedings Vol. 6483:
Complex Light and Optical Forces
David L. Andrews; Enrique J. Galvez; Gerard Nienhuis, Editor(s)

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