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A simple method for determination of nonlinear propagation regimes in gases
Abstract : A simple method to evaluate the nonlinear propagation regimes in gases is demonstrated. The principle is to focus ultrashort laser pulses into a gas cell, vary the input pulse power and measure the transmission through a pinhole placed at the output. The resulting transmission curve yields an intuitive signature of various nonlinear propagation regimes. Going from low powers to higher, one first observes a brief decrease in the transmission due to nonlinear moving focus. Then, a sharp rise occurs, indicating the starting of the filamentation process. When the power increases further, the transmission saturates and eventually decreases due to the beginning of multi-filamentation. As a result, this method gives a quick and sensitive measurement of pulse energies required to have single and multiple filaments.
Keywords :
Nonlinear Optics
https://hal-polytechnique.archives-ouvertes.fr/hal-00454995
Contributor : Aurélien Houard <>
Submitted on : Tuesday, February 9, 2010 - 2:30:36 PM
Last modification on : Tuesday, October 6, 2020 - 4:30:48 PM
Contributor : Aurélien Houard <>
Submitted on : Tuesday, February 9, 2010 - 2:30:36 PM
Last modification on : Tuesday, October 6, 2020 - 4:30:48 PM
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