Second harmonic generation of a new nonlinear optical material: urea L-malic acid

Abstract

Second harmonic generation (SHG) of a new organic optical crystal-urea L-malic acid (ULMA) was studied. A comparison of SHG efficiency of ULMA and KDP at a fundamental wavelength of 1064 nm using the Kurtz powder method demonstrated that the second order nonlinear coefficient of ULMA is 1.57 times of that of KDP, and the damage threshold of ULMA is relatively higher. Finally, both Type I and Type II phase match angles of the biaxial crystal ULMA were calculated.

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