Temperature-dependent refractive index of potassium acid phthalate (KAP) in the visible and near-infrared

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• 作者：K. Moutzouris^a ; ^{moutzouris@ee.teiath.gr} ; I. Stavrakas^a ; D. Triantis^a ; M. Enculescu^b
• 关键词：Nonlinear optical materials ; Temperature-dependent Sellmeier equations ; KAP
• 刊名：Optical Materials
• 出版年：2011
• 出版时间：April 2011
• 年：2011
• 卷：33
• 期：6
• 页码：812-816
• 全文大小：359 K

文摘

We report an investigation of the temperature-dependence of the refractive index of potassium acid phthalate (KAP) crystal. Refractive index measurements are based on a refractometer setup operating in a temperature range from 25 °C to 200 °C and using five different laser wavelengths in the visible and near-infrared. Temperature-dependent dispersion relations are proposed, with an average fitting quality that exceeds experimental accuracy, and compared to previous room-temperature Sellmeier equations. Consequently, the new relations are employed for the calculation of various linear and nonlinear optical properties of KAP.