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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 24 — Nov. 22, 2010
  • pp: 24706–24714

Electro-optic guided-to-radiation mode conversion in annealed proton-exchanged PPLN waveguides

J. W. Chang, Y. H. Chen, Q. H. Tseng, W. K. Chang, S. L. Deng, and C. S. Hsieh  »View Author Affiliations

Optics Express, Vol. 18, Issue 24, pp. 24706-24714 (2010)

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We report the design and experimental demonstration of electro-optically active TM-guided to TE-radiation mode converters in annealed proton-exchanged (APE) periodically poled lithium niobate (PPLN) channel waveguides in telecom S-C-L bands (1495-1640 nm). A maximum mode conversion efficiency of >95%/cm was obtained at 1520 nm from a 24-μm-period APE PPLN waveguide under an electro-optic (EO) field of ~6.3 V/μm at 35°C. This efficiency has been enhanced by a factor of >4.6 over a waveguide built in the single-domain (unpoled) LiNbO3; it is also to the best of our knowledge the most efficient guided-to-radiation (GTR) mode converter ever reported based on LiNbO3 on-axis waveguides. A conversion bandwidth of ~250 nm was also observed from this EO GTR mode converter.

© 2010 OSA

OCIS Codes
(230.2090) Optical devices : Electro-optical devices
(250.7360) Optoelectronics : Waveguide modulators
(130.5440) Integrated optics : Polarization-selective devices

ToC Category:
Integrated Optics

Original Manuscript: October 1, 2010
Revised Manuscript: November 1, 2010
Manuscript Accepted: November 1, 2010
Published: November 10, 2010

J. W. Chang, Y. H. Chen, Q. H. Tseng, W. K. Chang, S. L. Deng, and C. S. Hsieh, "Electro-optic guided-to-radiation mode conversion in annealed proton-exchanged PPLN waveguides," Opt. Express 18, 24706-24714 (2010)

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