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Temperature dependent emission and absorption cross section of Yb3+ doped yttrium lanthanum oxide (YLO) ceramic and its application in diode pumped amplifier

Saumyabrata Banerjee, Joerg Koerner, Mathias Siebold, Qiuhong Yang, Klaus Ertel, Paul D. Mason, P. Jonathan Phillips, Markus Loeser, Haojia Zhang, Shenzhou Lu, Joachim Hein, Ulrich Schramm, Malte C. Kaluza, and John L. Collier

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Abstract

Temperature dependent absorption and emission cross-sections of 5at% Yb3+ doped yttrium lanthanum oxide (Yb:YLO) ceramic between 80K and 300K are presented. In addition, we report on the first demonstration of ns pulse amplification in Yb:YLO ceramic. A pulse energy of 102mJ was extracted from a multi-pass amplifier setup. The amplification bandwidth at room temperature confirms the potential of Yb:YLO ceramic for broad bandwidth amplification at cryogenic temperatures.

©2013 Optical Society of America

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Figures (8)
Fig. 1
Fig. 1 Emission and absorption cross-section calculation for 5at% Yb:YLO at room temperature.

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Fig. 2
Fig. 2 Temperature dependent absorption cross-section for 5% doped Yb:YLO ceramic. The inset shows the variation of the absorption bandwidth (FWHM) at 952 nm as a function of temperature.

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Fig. 3
Fig. 3 Temperature dependent emission cross-section for 5% doped Yb:YLO ceramic. The inset shows the variation of the emission bandwidth (FWHM) at 1031 nm as a function of temperature.

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Fig. 4
Fig. 4 Absorption and emission cross-sections for 2at% Yb:YAG at 300 K and 5at% Yb:YLO at 80 K.

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Fig. 5
Fig. 5 (a) Image of the reference screen with no sample inserted, (b) is image with Yb:YLO ceramic sample inserted (SMSE, China), (c) is image with commercially available Yb:YAG ceramic sample inserted (Konoshima, Japan) .

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Fig. 6
Fig. 6 Schematic diagram of the Yb:YLO amplification experiment.

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Fig. 7
Fig. 7 (a) Pump profile, (b) seed beam profile, (c) transmitted seed beam profile with no amplification, and (d) amplified beam profile with full pump power.

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Fig. 8
Fig. 8 (a) Evolution of gain with respect to the pump input. Seed input reduced to 40µJ. (b) Amplification results with respect to the absorbed pump energy, oscillator tuned to 1031nm with a seed input of 1mJ.

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Tables (1)

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Table 1 Partition functions at different temperatures

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Equations (1)

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s e ( T ) = 4.29711 × 1 0 −21 + 3.73712 × 1 0 −22 * T – 3.43657 × 1 0 −24 * T 2 + 1.14391 × 1 0 −26 * T 3 – 1.33639× 1 0 −29 * T 4
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