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Two-Photon Absorption and Spectral-Narrowed Light Source

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11 Author(s)
Fang, Hong-Hua ; State Key Lab. for Integrated Optoelectron., Jilin Univ., Changchun, China ; Xu, Bin ; Chen, Qi-Dai ; Ran Ding
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This paper reports the two-photon absorption (TPA) and the spectral-narrowed light emission (SNLE) from the crystals of 9, 10-distyrylanthracene (DSA) derivatives. The results obtained by the Z-scan method show that the tested molecules possess high TPA cross sections. Upon near-IR excitation, strong two-photon-excited fluorescence could be observed in the crystals of four types of materials. Furthermore, SNLE with low threshold occurs in three of the four crystals under pumping with the second harmonic generated in the amplifier. Single crystals of the DSA derivatives exhibit unique photonic properties, including strong solid-state fluorescence, large TPA cross section, and stimulated emission. The results demonstrate that these are potential candidates for compact and practical solid-state laser applications.

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Quantum Electronics, IEEE Journal of  (Volume:46 ,  Issue: 12 )