Ms. Yuxia Chen Profile

Yuxia Chen

at Henan Univ

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Proceedings Article | 5 November 2010 Paper

Synthesis and 3PA induced optical limiting effect of a carbazole derivative

Yuxia Chen, Junhui Liu, Mingju Huang

Proceedings Volume 7846, 784610 (2010) https://doi.org/10.1117/12.870080

KEYWORDS: Luminescence, Absorption, Optical limiting, Quantum efficiency, Molecules, Quartz, Transmittance, Q switched lasers, Neodymium, YAG lasers

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N-Butyl-3,6-diformylcarbazole (abbreviated as b) was synthesized by the reaction of N-alkylation and the product yield was 45%. The structure was characterized by Nuclear Magnetic Resonance. Its optical properties were studied. The compound had strong fluorescence emission, and the fluorescence quantum yield was 0.40. Utilized experiment,we surveyed the effect of temperature on steady state fluorescence intensity, at 278K, 288K, 298K, 308K and 313K in DMF respectively. The measurement of the three-photon absorption (3PA) induced optical limiting effect was done in a 10-mm-long transparent quartz cell, using a Q-switched Nd: YAG laser with pulse duration of 38 ps, repetition rate of 10 Hz at 1064nm. In the case of low incident intensity, the transmittance varied linearly with incident intensity. However, the transmittance increased slowly under the condition of high incident intensity. The calculated results based on 3PA theory agreed well with the experimental results and it was inferred that the optical limiting of the compound resulted from its 3PA. The 3PA coefficient value was 6.1×10^-23 cm⁶/w² and its corresponding absorption section was 8.7×10^-79 cm⁶s².

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