Infrared‐to‐visible upconversion luminescence in neodymium‐doped bismuth–borate glass

Abstract

The upconversion luminescence in Nd3+‐doped bismuth–borate glass, excited by 0.8 µm light, was studied in the visible spectral region. Four distinct emission bands were found. From their kinetics, two mechanisms can be shown to be responsible for all four lines: energy‐transfer upconversion, slightly dominating, and excited state absorption. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Green and red fluorescence upconversion in neodymium-doped low phonon antimony glasses

“…Such excitation of ET enhances by the low phonon energy of the KBS antimony glasses and results in higher population of 4 G 7/2 energy levels. The above mechanisms corroborate well with those documented in literature [24,26,28].…”

“…Currently sincere attention has been focused on development of Nd-doped low phonon glasses (like lead, bismuth, tellurite and fluoride glasses) [22][23][24][25][26][27][28][29][30][31], which display efficient upconversion of the infrared (IR) into visible light. The low phonon oxide glasses having high refractive index, small absorption coefficient within the wavelength of interest (visible region), high chemical and thermal durability are therefore the most appropriate materials for technological purposes.…”

Intense visible luminescence from Nd3+-doped yttrium oxysulfide

“…Among the rare-earth ions, Nd 3 + is recognized as one of the most efficient rare-earth ions for solid-state laser materials due to its intense luminescence at 1.06 mm [1][2][3]. Recently, spectroscopic results showed that Nd 3 + could also be used as a good candidate for up-conversion luminescent material in the visible light region [4,5]. These results have encouraged the research on luminescent properties of Nd 3 + in the visible light region.…”

Optical properties of the Na2O–B2O3–Bi2O3–MoO3 glasses

“…Also, the bismuth borate glass systems have nowadays-wide applications for optoelectronic materials such as laser host fibers for communications and photonic switches. Also, these glasses exhibit a high refractive index, widely adjustable in the range from 1.8 to 2.5 by the appropriate glass composition and have high energy gap attributable to the high polarizability of Bi 2 O 3 which allows using them in wide spectra range from UV up to infrared [4][5][6].…”