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Applied Optics

Applied Optics


  • Vol. 39, Iss. 33 — Nov. 20, 2000
  • pp: 6144–6149

Mode coupling in tilted planar waveguide gratings

Kyung Shik Lee  »View Author Affiliations

Applied Optics, Vol. 39, Issue 33, pp. 6144-6149 (2000)

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Three different grating tilting formulas for predicting the optimum grating tilt angle for strong mode coupling in planar waveguide gratings are derived. The optimum tilt angles obtained by the ray-optics approach deviate ∼1° for transmissive mode coupling and ∼1.5° for reflective mode coupling from those computed by the coupled-mode approach. The coupled-mode analysis and ray-optics analysis of the tilted planar waveguide gratings show that the transmissive planar waveguide gratings should be tilted more than 84° for strong TE0-to-TEμ mode coupling near 1550 nm.

© 2000 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(060.2340) Fiber optics and optical communications : Fiber optics components
(230.1950) Optical devices : Diffraction gratings
(230.7390) Optical devices : Waveguides, planar

Original Manuscript: March 16, 2000
Revised Manuscript: July 31, 2000
Published: November 20, 2000

Kyung Shik Lee, "Mode coupling in tilted planar waveguide gratings," Appl. Opt. 39, 6144-6149 (2000)

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