Multi-wavelength visible up-converted luminescence in novel heavily doped Ytterbium–Holmium silica fiber under low-power IR diode pumping

Optical properties of Ho-doped alumino–germano-silica glass optical fiber

“…It is noted that energy level 5 I 4 was not observed in Fiber-1 and was possibly clubbed together with 5 I 5 in Fiber-2. Similar energy levels have been also reported for Ho-doped silica glass fiber in [11,18,[22][23][24]. Comparison of our results for the Ho-doped in alumino-germanosilica glass fiber and other reported results for the Hodoped materials is given in Table 6, which shows somewhat lower radiative probabilities in the silica glass fiber.…”

“…5 F 4 and then excited state emission 5 F 4 ! 5 I 8 at 547 nm [2,11]. Absolute peak power at 547 nm was about 100 nW, and as compared to the pumping power of 100 mW, it is a very inefficient infrared to visible conversion.…”

“…In particular, the Tm-doped fluorozirconate fibers and the Prdoped fluoride fibers have been proposed for the blue upconversion [5][6][7][8], the Er-doped glasses and optical fibers for the green emission, and the Yb/Pr-doped fluoride glasses and fibers for the red emission [9,10]. Multiwavelength visible upconverisons in silica glass fiber doped with Yb/Ho-ions have been reported upon 978.5 nm laser diode pumping [11]. Increasing demand for the internet is also challenging researchers to develop amplifiers in 800 nm band for its utility as the optical communication window and in this regard, the Tm-doped silica based optical fibers amplifiers are already demonstrated by our group [12][13][14].…”

Ultralow-threshold laser and blue shift cooperative luminescence in a Yb3+ doped silica microsphere

“…The specific CL is located in the blue region, which has potential application in three-dimensional display. 7 Although CL has been investigated in a variety of nanophosphors, glasses, and wave-guiding systems, [8][9][10][11][12][13][14][15][16][17] some of their features remain unclear. Silica microsphere resonators with whispering gallery modes (WGMs) posse the characteristics of ultrahigh quality factor (Q) and small modal volumes, which can drastically reduce the pump power required to generate laser emission and nonlinear effects.…”

Preparation and optical properties of HoF3–BaF2–AlF3–GeO2 glasses

“…In any cases, it is interesting to investigate the host material in which a large amount of LnF 3 exists uniformly. In this study, the oxide fluoride glasses with a high content of HoF 3 were tried to be prepared and their optical properties were studied because Ho 3+ showed an unique optical properties like fluorescence at 550 nm [12][13][14][15][16][17][18][19][20][21].…”