Open AccessRaman random lasing in Ba(NO3)2 powder
Author(s) -
М. А. Шевченко,
A. N. Baranov,
A. D. Kudryavtseva,
A. N. Maresev,
N. V. Tcherniega,
S. F. Umanskaya,
А. И. Водчиц,
К И Земсков
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2127/1/012043
Subject(s) - picosecond , nanosecond , lasing threshold , materials science , raman spectroscopy , raman scattering , excitation , barium , laser , analytical chemistry (journal) , optoelectronics , optics , chemistry , physics , metallurgy , wavelength , chromatography , quantum mechanics
Random lasing in Raman active material – barium nitrate powder – has been registered in two temporal regimes: nanosecond and picosecond. Stimulated Raman scattering (SRS) in Ba(NO 3 ) 2 for picosecond excitation has been shown to have much lower threshold and spectrum containing more components than for nanosecond excitation opposite to the case of a bulk medium. In picosecond regime SRS intensity increased with temperature decreasing and redistributed in favor of the higher order components. SRS pulse duration in picosecond regime was estimated to be in the range 16.5-22 ps. High conversion efficiency of SRS in barium nitrate powder in picosecond regime and its larger stability under laser impact than for bulk samples gives possibility to use it as an active material in Raman converters.