Now showing items 1-10 of 2455
Optical limiting behavior of tungstate fluorophosphate glasses
Nonlinear absorption measurements were performed on fluorophosphate glasses with high concentration of tungsten oxide. Large two-photon absorption coefficients, α2, were determined at 660 nm using nanosecond laser pulses. ...
Nonlinear optical absorption of antimony and lead oxyhalide glasses
The optical limiting behavior and nonlinear optical properties of antimony and lead oxyhalide glasses were discussed. The large nonlinear absorption coefficients which range from 11 to 20 cm/GW was determined using standard ...
Giant non-linear absorption in Er3+-doped fluoroindate glass
Non-linear absorption is observed in Er3+-doped fluoroindate glass (in mol% 37InF2:20ZnF2:20SrF2:16BaF2:2GdF2: 2NaF:1GaF3:2ErF3) when the sample is irradiated with a CW laser emitting at 650 nm. An intensity dependence of ...
Nonlinear absorption spectrum in perylene derivatives
Knowledge about nonlinear absorption spectra of materials used in photonic devices is of paramount importance in determining their optimum operation wavelengths. In this work, we have investigated the two-photon absorption ...
Relationship between the optical gap and the optical-absorption tail breadth in amorphous GaAs
(American Institute of Physics (AIP), 2004-12-15)
We study the relationship between the optical gap and the optical-absorption tail breadth for the case of amorphous gallium arsenide (a-GaAs). In particular, we analyze the optical-absorption spectra corresponding to some ...
Thermo-optical Properties of Nanofluids
(El Springer, 2013)
Upconversion of infrared-to-visible light in Pr3+-Yb3+ codoped fluoroindate glass
Bright fluorescence in the visible range has been observed in Pr3+-Yb3+ doped fluoroindate glass under infrared diode laser irradiation. The mechanism which contributes for the upconversion emission is identified and the ...
Excited State Absorption of Doped and Undoped Polyanyline
(TAYLOR & FRANCIS LTD, 2010)
Polyaniline is a conducting polymer with appealing electrical and optical properties, arising from the -conjugation along the polymer backbone. The understanding of its excited state absorption is of prime importance for ...
Antimony glasses with large nonlinear refractive indices, small two-photon absorption coefficients and ultrafast response at telecom wavelengths
Nonlinear (NL) optical properties of antimony oxide based glasses (AG) were characterized for excitation wavelengths from 800 to 1600 m. The NL refractive indices, n2, and the two-photon absorption (TPA) coefficient, β, ...