Numerical characterization of focused ultra-short Gaussian light pulses

Authors

Kristine Marie Romallosa National Institute of Physics, University of the Philippines Diliman
Johnrob Bantang National Institute of Physics, University of the Philippines Diliman
Caesar Saloma National Institute of Physics, University of the Philippines Diliman

Abstract

Focal patterms of focused ultra-short Gaussian pulsed beams are compared to the corresponding profiles with focused continuous wave (CW) beams with wavelength equal to the central wavelength λ₀. Focal profiles differ from that with CW in terms of beam spot size and peak locations as a function of the pulse width (Δτ) and numerical aperture (NA). Effectively broadened axial and transverse profiles are noted with pulsed beams. Intensity distributions also reveal presence of other colors aside from that corresponding to λ₀. There is a trade-off between achieving high peak power for the pulse and the amount of energy of λ₀ critical to excitation application. As Δτ is increased beyond ~100 fs, the patterns approach that with CW, thus differences will only be apparent for Δτ < 10 fs.

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Issue

2002: Proceedings of the 20th Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2002-1D-03

Section

Instrumentation and Optics

Published

2002-10-23

How to Cite

[1]

KM Romallosa, J Bantang, and C Saloma, Numerical characterization of focused ultra-short Gaussian light pulses, Proceedings of the Samahang Pisika ng Pilipinas 20, SPP-2002-1D-03 (2002). URL: https://proceedings.spp-online.org/article/view/SPP-2002-1D-03.