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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 26 — Dec. 25, 2006
  • pp: 12644–12654

Widely tunable long-period waveguide grating couplers

Y. Bai, Q. Liu, K. P. Lor, and K. S. Chiang  »View Author Affiliations

Optics Express, Vol. 14, Issue 26, pp. 12644-12654 (2006)

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We demonstrate experimentally two widely tunable optical couplers formed with parallel long-period polymer waveguide gratings. One of the couplers consists of two parallel gratings and shows a peak coupling efficiency of ~34%. The resonance wavelength of the coupler can be tuned thermally with a sensitivity of 4.7 nm/°C. The experimental results agree well with the coupled-mode analysis. The other coupler consists of an array of ten widely separated gratings. A peak coupling efficiency of ~11% is obtained between the two best matched gratings in the array and the resonance wavelength can be tuned thermally with a sensitivity of -3.8 nm/°C. These couplers have the potential to be further developed into practical broadband add/drop multiplexers and signal dividers.

© 2006 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(130.3120) Integrated optics : Integrated optics devices
(250.5460) Optoelectronics : Polymer waveguides

ToC Category:
Diffraction and Gratings

Original Manuscript: October 24, 2006
Revised Manuscript: December 6, 2006
Manuscript Accepted: December 12, 2006
Published: December 22, 2006

Y. Bai, Q. Liu, K. P. Lor, and K. S. Chiang, "Widely tunable long-period waveguide grating couplers," Opt. Express 14, 12644-12654 (2006)

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