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- Title
Tracing Evolution of Angle-Wavelength Spectrum along the 40-m Postfilament in Corridor Air.
- Authors
Mokrousova, Daria V.; Pushkarev, Dmitrii V.; Panov, Nikolay A.; Nikolaeva, Irina A.; Shipilo, Daniil E.; Zhidovtsev, Nikita A.; Rizaev, Georgy E.; Uryupina, Daria S.; Couairon, Arnaud; Houard, Aurélien; Skryabin, Dmitry V.; Savel'ev, Andrey B.; Kosareva, Olga G.; Seleznev, Leonid V.; Ionin, Andrey A.
- Abstract
Postfilamentation channel resulting from filamentation of freely propagating 744-nm, 5-mJ, 110-fs pulse in the corridor air is examined experimentally and in simulations. The longitudinal extension of postfilament was determined to be 55–95 m from the compressor output. Using single-shot angle-wavelength spectra measurements, we observed a series of red-shifted maxima in the spectrum, localized on the beam axis with the divergence below 0.5 mrad. In the range 55–70 m, the number of maxima and their red-shift increase with the distance reaching 1 μm, while the pulse duration measured by the autocorrelation technique is approximately constant. Further on, for distances larger than 70 m and up to 95 m, the propagation is characterized by the suppressed beam divergence and unchanged pulse spectrum. The pulse duration increases due to the normal air dispersion.
- Subjects
AIRWAYS (Aeronautics); COMPRESSORS
- Publication
Photonics, 2021, Vol 8, Issue 10, p446
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics8100446