Efim A. Khazanov

Institute of Applied Physics RAS, Russia

 

Compression of femtosecond laser pulses using self-phase modulation: from kilowatts to petawatts in 40 years

The pulse duration at the output of femtosecond lasers is usually close to the Fourier limit, and can be shortened by increasing the spectral width. To this end, use is made of self- phase modulation when a pulse propagates in a medium with cubic nonlinearity. Then, the pulse with a chirp (frequency dependence of the spectrum phase) is compressed due to a linear dispersion element, which introduces a chirp of the same modulus, but oppo- site in sign. This pulse post-compression, known since the 1960s, has been widely used and is being developed up to the present for pulses with energies from fractions of a nJ to tens of J. The review is devoted to the theoretical foundations of this method, problems of energy scaling, and a discussion of the results of more than 150 experimental studies.

 

Short bio:

Russian physicist, specialist in the field of laser physics and nonlinear optics, corresponding member of the Russian Academy of Sciences (2008), academician of the Russian Academy of Sciences (2019). Deputy Director of the Federal Research Center of the Institute of Applied Physics of the Russian Academy of Sciences, Head of the Department of Nonlinear Dynamics and Optics, Professor of the UNN, Head of the Laboratory "Physical Methods, Acousto-Optical and Laser Equipment for Diagnostics and Therapy of Oncological Diseases" at NUST MISIS. In 2018 he became a Laureate of the State Prize of the Russian Federation for creating the fundamental foundations and instrumental solutions to the problems of registering gravitational waves.

E. Khazanov is an author of more than 200 papers on solid-state lasers with diffraction divergence and high average power, thermooptics of solid-state lasers, optical parametric amplifiers of chirped femtosecond laser pulses, petawatt lasers, nonlinear optics, including the wavefront reversal techniques.