Ultrashort pulse non-linear optical absorption in transparent media

  1. Get@NRC: Ultrashort pulse non-linear optical absorption in transparent media (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1364/OPEX.13.003208
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Journal titleOptics Express
Pages32083217; # of pages: 10
SubjectDeposition; Gaussian noise (electronic); Laser beams; Light absorption; Microscopic examination; Nonlinear optics; Photons; Surgery; Threshold elements; Wave propagation; Beam propagation; Dielectric modification; Energy distribution; Non-linear absorption; Ultrashort pulses
AbstractA focused ultrashort pulse can reach high enough intensity that non-linear ionization dominates its interaction with transparent media while still having relatively low fluence. In this case, the energy extracted from the beam can counter self-focusing by energy depletion and plasma formation, providing controlled energy deposition that can modify the material in a highly local manner. We demonstrate that non-linear absorption limits the intensity that can be reached and that the energy is deposited prior to the focus. We model the energy distribution, and predict and measure the energy transmitted through the focus. We establish the threshold intensity for non-linear ionization in dielectrics at ∼ 1013 W cm-2. We use the refractive index modification that the non-linear ionization causes in glass to image the spatial distribution of the energy deposition.
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AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedYes
NPARC number21276151
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Record identifier71a3fd9b-98c9-4af0-9ac4-1ac759e25515
Record created2015-09-28
Record modified2016-05-09
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