Fan Shi, Meng Zhao, Chen Jia, Yufeng Zhao, Shengyong Chen, "Solid-state green-light-emitting upconversion coherent random laser in macroporous LiNbO3:Er," Chin. Opt. Lett. 16, 011403 (2018)
- Chinese Optics Letters
- Vol. 16, Issue 1, 011403 (2018)
Fig. 1. Emission spectra of the macroporous LN:Er sample at different excitation intensities (30 and 70 kW / cm 2
Fig. 2. Integrated emission intensity as a function of the excitation intensity on a log-log scale for (a) macroporous and (b) bulk LN:Er. The intensities were integrated from 520 to 570 nm (green-light-emission band). Solid lines are the pertinent linear fits.
Fig. 3. Emission spectrum of macroporous LN:Er at 20° from the sample surface (pump intensity: 70 kW / cm 2
Fig. 4. Energy levels of Er 3 +
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