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The nonlinear absorption coefficient β of Azo (Azobenzene) liquid crystal polymer (LCP) was measured by using open aperture Z-scan technique with 10 ns, 532 nm laser pulses. The value of β is 9.02 cm/GW. The optical limiting (OL) response of Azo LCP in tetrahydrofuran (THF) was measured also by use of the Q-switched (10 ns) second-harmonic generation Nd:YAG pulse. We attribute the nonlinear absorption...
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