Three-dimensional characterization of the effective second-order nonlinearity in periodically poled crystals |
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| Authors: | Holmgren Stefan J Pasiskevicius Valdas Wang Shunhua Laurell Fredrik |
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| Institution: | Department of Physics, Royal Institute of Technology, Roslagstullsbacken 21, SE-10691 Stockholm, Sweden. sh@laserphysics.kth.se |
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| Abstract: | A novel technique for characterization of the second-order nonlinearity in nonlinear crystals is presented. It utilizes group-velocity walk-off between femtosecond pulses in type II SHG to achieve three-dimensional resolution of the nonlinearity. The longitudinal and transversal spatial resolution can be set independently. The technique is especially useful for characterizing quasi-phase-matched nonlinear crystals, and it is demonstrated in potassium titanyl phosphate. |
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