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We report the first deposition of Er3+-doped aluminum oxide thin-film optical waveguides by plasma-enhanced chemical vapor deposition (PECVD). The aluminum and erbium precursors used for the deposition of the thin films were trimethyl-aluminum and Er tri-chelate of 2,2,6,6-tetramethylheptane-3,5 dione respectively. The samples show broad, room-temperature photoluminescence at λ=1.533 μm. The Er3+ concentration ranged from 0.01-0.2 at%. The full width half maximum (FWHM) of the Er3+ emission spectrum is 55 nm, considerably broader than in silica glass. The radiative lifetime has been measured at 50-mW pump power 相似文献
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Small-signal amplification in short, Yb3+-sensitized, Er3+-doped alumina (Al2O3) channel optical waveguides with high Er3+ concentrations is analyzed. Taking into account uniform up conversion, excited state absorption (ESA) from the Er3+ metastable level (4I13/2 ), and Yb3+→Er3+ energy transfer by cross relaxation, the obtainable gain improvements compared to Yb3+ -free Er3+-doped Al2O3 optical waveguides are investigated. The amplifier model is based on propagation and population rate equations and is solved numerically by combining finite elements and the Runge-Kutta algorithm. The analysis predicts that 5-cm long Yb3+/Er3+ co-doped Al2O 3 waveguides show 13-dB net signal gain for 100 mW pump power at λp=980 nm 相似文献
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We present a theoretical model of a loss-compensated symmetric Y-junction acting as an optical beam splitter. We consider silica (SiO 2) channel waveguides which are assumed to be highly doped with Er3+. The model was developed using the beam propagation method (BPM) and a fast-Fourier-transform (FFT)-based algorithm. The analysis showed that considerable gain levels, about 4.2 dB/cm at each port of the Y-junction, can be achieved for erbium concentration 2.5×1020 ions/cm3, signal power 1 μW and pump power 250 mW 相似文献
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Chryssou C.E. Di Pasquale F. Pitt C.W. 《IEEE journal of selected topics in quantum electronics》2000,6(1):114-121
Er3+-doped tellurite and Er3+-doped alumina optical waveguide amplifiers are analyzed both as single amplifiers and as elements of 16-channel wavelength-division multiplexing (WDM) systems; their performances are compared with that from Er3+-doped Al/P silica waveguide amplifiers. The amplifier model is based on propagation and population-rate equations and includes both uniform and pair-induced up-conversion mechanisms. It is solved numerically by combining finite elements and the Runge-Kutta algorithm. The analysis predicts that Er3+-doped tellurite waveguides exhibit improved gain characteristics compared with alumina and Al/P silica waveguides. Using Er3+-doped tellurite waveguide amplifiers, it is suggested that 16 WDM channels may be transmitted to a maximum distance of 4250 km. By using in-line notch gain equalizing filters, the maximum transmission distance can be increased to 5250 km 相似文献
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