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Optical amplification in -doped transparent single crystal at 850 nm
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View: Figures


Image of FIG. 1.
FIG. 1.

Pump and probe setup used in this experiment.

Image of FIG. 2.
FIG. 2.

Energy level diagram of ions in the BNN crystal. Dashed lines show the transitions which are produced by using Nd:YAG pulsed laser and tunable cw Ti:sapphire laser at 850 nm . Solid line shows the optical gain transitions in the four (850 nm) level schemes.

Image of FIG. 3.
FIG. 3.

RT absorption spectrum of BNN:Er in the 400–700 nm region.

Image of FIG. 4.
FIG. 4.

(a) Emission cross section of the transition. (b) Emission spectrum for the doped BNN sample at 850 nm probe wavelengths. The solid line corresponds to and the dashed line shows . The arrow indicated the probe wavelength.

Image of FIG. 5.
FIG. 5.

Optical gain as a function of the pump energy density from 35 to with a power probe density of .

Image of FIG. 6.
FIG. 6.

Experimental measure (dot line) and theory simulation (solid line) of the optical gain as a function of time. The inset of the figure shows the optical gain as a function of time at different pump energy densities from 35 to with a power probe density of . The arrow shows the increasing direction of pump energy density.

Image of FIG. 7.
FIG. 7.

Simulation of the population evolution of and levels according to the rate equations.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Optical amplification in Er3+-doped transparent Ba2NaNb5O15 single crystal at 850 nm