Нелинейно-оптический метод регистрации чирпа фемтосекундного ИК лазерного импульса
Abstract
A new method for recording the chirp of a femtosecond IR laser pulse is proposed, based on non-collinear generation of the sum harmonic by a transform-limited IR femtosecond pulse and a pulse with a spectral supercontinuum. This paper presents the time dependences of the instantaneous frequency of an IR pulse with a spectral supercontinuum, obtained from twodimensional distributions of dynamic spectrograms. It is shown that the relative error in determining the chirp of a femtosecond IR laser pulse by the proposed method does not exceed 10%. The presented results can be used in the development of a nonlinear optical phase correlator for determining the phase and time profile of a femtosecond laser pulse in the mid�� IR range.
Fields of Study & Subjects
Photorefractive and Nonlinear Optics
Laser-Matter Interactions and Applications
Laser Design and Applications
Publication details
- Journal / source
- Proceedings of NAS RA Physics
- Publisher
- National Academy of Sciences of the Republic of Armenia
- Volume
- 61
- Issue
- 1
- Pages
- 109–109
- Publication date
- 17 April 2026