Lasing of Some Red Laser Dyes in Annealed Silica Xerogel

• Published in: Journal of applied spectroscopy Vol. 84; no. 6; pp. 966 - 970
• Main Authors: Bezkrovnaya, O. N., Maslov, V. V., Pritula, I. M., Yurkevich, A. G.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.01.2018; Springer; Springer Nature B.V
• Subjects: Analysis; Analytical Chemistry; ANNEALING; Atomic/Molecular Structure and Spectra; Biosensors; DYES; Emission analysis; EMISSION SPECTRA; FLUORESCENCE; GELS; LANTHANUM SELENIDES; LASER RADIATION; LASERS; MATERIALS SCIENCE; Physics; Physics and Astronomy; Pumping; RED SHIFT; SILICA; Silicon dioxide; SILICON OXIDES; Xerogels; SiO; specific laser energy; xerogel; matrix; laser dye; double-band radiation
• ISSN: 0021-9037; 1573-8647
• DOI: 10.1007/s10812-018-0572-1

The spectral and energy characteristics of generation in the red spectral region 650–720 nm were measured and analyzed for three laser dyes in preliminarily annealed SiO 2 xerogel matrices under laser excitation λ p = 588 nm in a nonselective cavity. The specific laser-energy output for two of them (LK678 and Ox170) in the matrices was 10–13% higher than in MeOH. NBA dye in the matrix generated two laser radiation bands in the 700–720 nm region with pumping E p ≥ 80 mJ whereas its generation threshold in MeOH exceeded the maximum pumping energy of 140 mJ so that NBA generation was not observed. Laser emission spectra of the studied matrices in a nonselective cavity were red-shifted by ~1000 cm –1 from the fluorescence maximum. Such a shift could improve the characteristics of biosensors based on these matrices.