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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 21 — Oct. 10, 2011
  • pp: 20904–20909

Ultra-low inter-channel crosstalk in array waveguide device incorporating self-assembled microsphere diffraction layer

Jun-Whee Kim, Nam-Seon Son, Ji-Hyang Jang, Kyung-Jo Kim, and Min-Cheol Oh  »View Author Affiliations

Optics Express, Vol. 19, Issue 21, pp. 20904-20909 (2011)

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In array-type optical devices integrated on a single chip with high density, the crosstalk between adjacent devices causes main reason of limited transmission capacity in cascaded optical communication systems. In order to reduce the crosstalk in an arrayed variable optical attenuator, we incorporated a self-assembled monolayer of a microsphere array in the device. The microsphere array introduces a large index contrast in the polymer waveguide, thereby causing strong diffraction of the planar guided modes toward the surface normal directions. Due to the microsphere diffraction, the inter-channel crosstalk between the adjacent channels in a variable optical attenuator array decreases to less than −50 dB.

© 2011 OSA

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(230.3120) Optical devices : Integrated optics devices
(250.5460) Optoelectronics : Polymer waveguides
(290.5850) Scattering : Scattering, particles

ToC Category:
Integrated Optics

Original Manuscript: July 18, 2011
Revised Manuscript: September 2, 2011
Manuscript Accepted: September 6, 2011
Published: October 3, 2011

Jun-Whee Kim, Nam-Seon Son, Ji-Hyang Jang, Kyung-Jo Kim, and Min-Cheol Oh, "Ultra-low inter-channel crosstalk in array waveguide device incorporating self-assembled microsphere diffraction layer," Opt. Express 19, 20904-20909 (2011)

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