Optical nonlinearity measurement of 4-(N-methyl, N-hydroxyethl)amino, 4'-nitroazobenzene using a transmittance technique with a phase object (T-PO) with top-hat beams at 600-nm wavelength |
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| Authors: | Jin Xiao Li Zhong-Guo Zhang Xue-Ru Yang Kun Wang Yu-Xiao Song Ying-Lin |
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| Affiliation: | a School of Measuring and Optical Engineering, Nanchang Hangkong University, Nanchang 330063, China;b Department of Physics, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | The transmittance technique with a phase object (T-PO), for measuring optical nonlinear coefficients is proposed with a top-hat beam. The sensitivity of the T-PO with a top-hat beam is a factor of 4 greater than that with a Gaussian beam. The validity of this method is verified by measuring the nonlinearity of a well-characterized liquid, CS2 at 532-nm wavelength. The ease of use of this method has been proved by measuring a new compound 4-(N-methyl, N-hydroxyethyl)amino, 4'-nitroazobenzene(ANAB) at 600-nm wavelength, indicating that this method can be extended to the measurement of optical nonlinearities in a wide-band spectrum. |
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| Keywords: | transmittance technique with a phase object (T-PO) phase object optical nonlinearities |
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