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Nonlinear Optics Phenomena Titanium doped Sapphire is the most widely used crystal for wavelengths tunable lasers.
It combines the excellent thermal, physical and optical properties of Sapphire with the broadest tunable range of any known material.
In optics, an ultrashort pulse of light is an electromagnetic pulse whose time duration is of the order of a picosecond or less.
Such pulses have a broadband optical spectrum, and can be created by mode-locked oscillators.
They are commonly referred to as ultrafast events.
Amplification of ultrashort pulses almost always requires the technique of chirped pulse amplification, in order to avoid damage to the gain medium of the amplifier.
Nonlinear optical behavior is not observed when light travels in free space.
The nonlinearity resides in the medium through which the light travels, rather than in the light itself.
The interaction of light with light is therefore mediated by the nonlinear medium: the presence of an optical ﬁeld modiﬁes the properties of the medium, which in turn causes another optical ﬁeld, or even the original ﬁeld itself, to be modiﬁed.
Mounir Khelladi was born in Tlemcen, Algeria, in 1975.
He received the B.E degree in electronics engineering from Tlemcen University in 1998 and the PhD degrees in nonlinear optics phenomena in 2010.
He becomes an assistant professor at the same university in 2013.
His interesting research is about femtosecond laser propagation,nonlinear phenomena.
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