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. 2015 Sep 3;5:13816. doi: 10.1038/srep13816

Figure 3. Upconversion spectrum.

Figure 3

From left to right, the signals are the second-harmonic of the excitation OPO wavelength at 806 nm, the self-sum-frequency due to the OPO beam and the 1062 nm RL, and the self-second-harmonic of the 1062 nm RL, respectively.