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  • Vol. 27, Iss. 12 — Jun. 15, 2002
  • pp: 1046–1048

Broadband quasi-phase-matched second-harmonic generation in MgO-doped periodically poled LiNbO_3 at the communications band

Nan Ei Yu, Jung Hoon Ro, Myoungsik Cha, Sunao Kurimura, and Takunori Taira  »View Author Affiliations


Optics Letters, Vol. 27, Issue 12, pp. 1046-1048 (2002)
http://dx.doi.org/10.1364/OL.27.001046


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Abstract

A novel scheme for broadband second-harmonic generation was developed with type I quasi phase matching by use of an off-digital nonlinear optical coefficient d31 . This was achieved by matching of the group velocities of the second harmonic and the fundamental, while the phase velocities were quasi phase matched. The desired group-velocity dispersion could be obtained with LiNbO3 doped with 5 mol. % of MgO. Efficient second-harmonic generation with a bandwidth of 52 nm was obtained for the fundamental wavelength centered at 1566 nm in MgO-doped periodically poled LiNbO3 , compared with a bandwidth of 1.3 nm for the conventional scheme using d33 . Efficient frequency doubling of an ultrafast pulse is expected without group-velocity walk-off or pulse distortion.

© 2002 Optical Society of America

OCIS Codes
(160.3730) Materials : Lithium niobate
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4360) Nonlinear optics : Nonlinear optics, devices
(320.7110) Ultrafast optics : Ultrafast nonlinear optics

Citation
Nan Ei Yu, Jung Hoon Ro, Myoungsik Cha, Sunao Kurimura, and Takunori Taira, "Broadband quasi-phase-matched second-harmonic generation in MgO-doped periodically poled LiNbO_3 at the communications band," Opt. Lett. 27, 1046-1048 (2002)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-27-12-1046


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References

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