Two-photon optical absorption in PbO-SiO2 glasses

Optical properties of Nd doped Bi2O3-PbO-Ga2O3 glasses.

The optical properties of a new family of neodymium doped BPG (Bi2O3-PbO-Ga2O3 ) glasses are presented. We measured a high refractive index, of 2.5, and a transmission cutoff in the far infrared at 8microm. Three intense emission bands are observed centered at 877nm, 1066nm and 1341nm. The emission cross-section is 10 -20 cm 2 and the total spectral linewidth is 30nm at 1066nm. The Judd-Ofelt p...

The Relationship between Structural and Optical Properties of GeO2-PbO Glasses

The structural and optical characterization of bulk GeO2-PbO glasses was the goal of this study. In this regard, six different (100-x)GeO2‌-xPbO (15<x<45) glasses were prepared by conventional melt quenching technique between two steel sheets. The produced samples were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and UV-Vis s...

Two photon absorption, nonlinear refraction, and optical limiting in semiconductors

Ultrafast two-photon absorption optical thresholding of spectrally coded pulses

Ž . We report studies on two-photon absorption TPA GaAs p-i-n waveguide photodetectors as optical thresholders for Ž . proposed ultrashort pulse optical code-division multiple-access CDMA systems. For either chirped optical pulses or spectrally phase coded pseudonoise bursts, the TPA photocurrent response reveals a strong pulseshape dependence and shows good agreement with theoretical predictio...

All-optical femtosecond switch using two-photon absorption

Over the last few decades, there has been a growing interest in all-optical approaches to computing and information processing 1 . All-optical approaches do not suffer from the intrinsic slow response of electronic components and have the potential for signal routing, processing, multiplexing, and demultiplexing with speeds exceeding terahertz THz rates. As is the case for electronic logic gate...