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Applied Optics

Applied Optics


  • Vol. 44, Iss. 7 — Mar. 1, 2005
  • pp: 1156–1159

Polarization dependence of the coupling ratio in LiTaO3 directional couplers

Yong-Wook Shin, Ohannes Eknoyan, and Henry F. Taylor  »View Author Affiliations

Applied Optics, Vol. 44, Issue 7, pp. 1156-1159 (2005)

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The effect of design and fabrication parameters on the polarization dependence of the splitting ratio in directional couplers produced in LiTaO3 by Zn diffusion has been investigated experimentally at a wavelength of 1558 nm. The directional couplers featured various combinations of waveguide width, separation gaps between waveguides, bending angle, and diffusion conditions. In each case the coupling region was 3.5 mm long. Of particular interest was the identification of parameter sets for which the sum of power splitting ratios from TE and TM inputs equals unity at the output, as needed for electro-optic tunable filters with relaxed beam-splitter requirements.

© 2005 Optical Society of America

OCIS Codes
(130.0130) Integrated optics : Integrated optics
(130.3120) Integrated optics : Integrated optics devices
(160.2100) Materials : Electro-optical materials
(230.1360) Optical devices : Beam splitters

Original Manuscript: July 27, 2004
Revised Manuscript: October 20, 2004
Manuscript Accepted: October 20, 2004
Published: March 1, 2005

Yong-Wook Shin, Ohannes Eknoyan, and Henry F. Taylor, "Polarization dependence of the coupling ratio in LiTaO3 directional couplers," Appl. Opt. 44, 1156-1159 (2005)

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