Stimulated supercontinuum–radiation generation of carbon disulfide by all-trans-β-carotene fluorescence enhancement effect in liquid core optical fibre

Stimulated Raman scattering (SRS) in lithium hydroxide-water/heavy water (LiOH-H2O/D2O) solutions with varying concentrations was investigated under laser-induced high-pressure conditions using an Nd: YAG laser. The spectra revealed a significant enhancement in SRS signals, characterized by the emergence of low-wavenumber Raman peaks and a shift of the main SRS peak of liquid water to lower frequencies, evolving from a single peak to two or three peaks, which suggested the formation of an ice-like structure. Additionally, the normalized SRS intensity was higher than that of pure water. The enhancement of SRS signals during LiOH dissolution was attributed to the cooperative modulation between hydrogen bonding (HB, O-H:O) by OH- and Coulombic electronic interactions generated by monovalent Li+, which strengthened HB interactions, increased the Raman gain coefficient, and induced structural modifications akin to pressure effects. Besides, the increased density amplified the dynamic high-pressure effects during the laser-induced breakdown (LIB) process, further boosting the SRS signals. This work provides valuable insights into the interaction mechanisms between alkali metal hydroxides and H2O/D2O under laser-induced pressure conditions, offering a comprehensive approach to understanding and enhancing the SRS effect in aqueous solutions.

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Stimulated supercontinuum–radiation generation of carbon disulfide by all-trans-β-carotene fluorescence enhancement effect in liquid core optical fibre

Abstract: Men Zhi-Wei(门志伟) a)b) , Fang Wen-Hui(房文汇) b) , Li Zuo-Wei(里佐威) b) , Qu Guan-Nan(曲冠男) b) , Gao Shu-Qin(高淑琴) b) , Lu Guo-Hui(陆国会) b) , Yang Jian-Ge(杨健戈) b)c) , and Sun Cheng-Lin(孙成林) a)b) †

Cited by 3 publications

References 16 publications

Rare earth doping effect on the optical properties of several fluorescence materials

Rare earth doping effect on the optical properties of several fluorescence materials

Study on temperature and current sensors based on optical driving optical fiber transmission

Stimulated Raman scattering and enhancement mechanisms in alkali metal hydroxide aqueous solutions under laser-induced dynamic pressure

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