Efficient second-harmonic generation of ultrafast pulses in periodically poled KNbO3

Efficient second-harmonic generation of 95 fs pulses were achieved by simultaneous group-velocity matching and quasi-phase matching in a 10 mm long periodically poled potassium niobate crystal. The quasi-phase-matched bandwidth was 38 nm and second-harmonic pulse duration was 158 fs with a fundament...

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Bibliographic Details
Published in:Applied physics letters 2004-12, Vol.85 (24), p.5839-5841
Main Authors: Yu, Nan Ei, Kurimura, Sunao, Kitamura, Kenji, Jeon, Oc-Yeub, Cha, Myoungsik, Ashihara, Satoshi, Ohta, Takayuki, Shimura, Tsutomu, Kuroda, Kazuo, Hirohashi, Junji
Format: Article
Language:English
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Summary:Efficient second-harmonic generation of 95 fs pulses were achieved by simultaneous group-velocity matching and quasi-phase matching in a 10 mm long periodically poled potassium niobate crystal. The quasi-phase-matched bandwidth was 38 nm and second-harmonic pulse duration was 158 fs with a fundamental input pulse of 95 fs without spectral and temporal distortion in the S-band of telecommunication. Utilizing the larger off-diagonal nonlinear coefficient, d31 of potassium niobate, the conversion efficiency was significantly improved from that of periodically poled MgO-doped lithium niobate. [Appl. Phys. Lett. 82, 3388 (2003)]
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1835557