Group-velocity-matched cascaded quadratic nonlinearities of femtosecond pulses in periodically poled MgO:LiNbO3 |
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| Authors: | Ashihara Satoshi Shimura Tsutomu Kuroda Kazuo Yu Nan Ei Kurimura Sunao Kitamura Kenji Ro Jung Hoon Cha Myoungsik Taira Takunori |
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| Institution: | Institute of Industrial Science, University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan. ashihara@iis.u-tokyo.ac.jp |
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| Abstract: | Large nonlinear phase shifts were generated with femtosecond pulses at 1560 nm through cascaded quadratic interactions in periodically poled MgO-doped LiNbO3. The off-diagonal component of the nonlinear coefficient was utilized for simultaneous quasi phase matching and group-velocity matching. The effective nonlinear refractive index was varied from -2.9 x 10(-14) to +3.3 x 10(-14) cm2/W by tuning the phase-mismatch conditions. |
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