Spatial mode behavior of second harmonic generation in a ridge-type waveguide with a periodically poled MgO-doped lithium niobate crystal

We report on spatial mode behavior of the second harmonic (SH) generated by nonlinear interaction in the a z-cut Mg-doped periodically poled LiNbO3 (MgO:PPLN) ridge-type waveguide. Specific SH modes were selectively generated by mode mixing of the fundamental harmonic (FH) waves. In addition, high-o...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2014-06, Vol.53 (6), p.62201-1-062201-5
Main Authors: Park, Jun-Hee, Kang, Tai-Young, Ha, Jeong-Ho, Lee, Han-Young
Format: Article
Language:English
Subjects:
Crystals
Harmonics
Lithium niobates
Magnesium
Matching
Nonlinearity
Second harmonic generation
Temperature control
Waveguides
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Summary:We report on spatial mode behavior of the second harmonic (SH) generated by nonlinear interaction in the a z-cut Mg-doped periodically poled LiNbO3 (MgO:PPLN) ridge-type waveguide. Specific SH modes were selectively generated by mode mixing of the fundamental harmonic (FH) waves. In addition, high-order SH modes TM10 and TM01 were simultaneously generated under similar phase-matching conditions in a quasi-phase matching (QPM) grating structure. The interfered mode profiles of high-order SH modes demonstrated specific mode distribution to have a diagonal angle and the Laguerre-Gaussian (LG) mode at a certain phase-matching condition obtained by temperature control.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.53.062201