Optical power limiting and stabilization using a two-photon absorbing neat liquid crystal in isotropic phase

He, Guang S.; Lin, Tzu-Chau; Prasad, Paras N.; Cho, Chih-Chien; Yu, Liang-Jye
June 2003
Applied Physics Letters;6/30/2003, Vol. 82 Issue 26, p4717
Academic Journal
This letter reports on a neat liquid crystal that incorporates a two-photon-absorbing chromophore in its structure. The nonlinear optical properties including two-photon-induced fluorescence spectrum and decay behavior, as well as the effective two-photon absorption coefficient of this liquid crystal in its isotropic phase are presented. Fairly good optical limiting and stabilization performance with this nonlinear material have been achieved by using ∼815-nm and ∼5-ns laser pulses.


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