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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 17 — Aug. 21, 2006
  • pp: 7966–7973

Two bit optical analog-to-digital converter based on photonic crystals

Binglin Miao, Caihua Chen, Ahmed Sharkway, Shouyuan Shi, and Dennis W. Prather  »View Author Affiliations

Optics Express, Vol. 14, Issue 17, pp. 7966-7973 (2006)

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In this paper, we demonstrate a 2-bit optical analog-to-digital (A/D) converter. This converter consists of three cascaded splitters constructed in a self-guiding photonic crystal through the perturbation of the uniform lattice. The A/D conversion is achieved by adjusting splitting ratios of the splitters through changing the degree of perturbation. In this way, output ports reach a state of ‘1’ at different input power levels to generate unique states desired for an A/D converter. To validate this design concept, we first experimentally characterize the relation between the splitting ratio and the degree of lattice perturbation. Based on this understanding, we then fabricate the 2-bit A/D converter and successfully observe four unique states corresponding to different power levels of input analog signal.

© 2006 Optical Society of America

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications
(130.0130) Integrated optics : Integrated optics

ToC Category:
Optical Devices

Original Manuscript: April 26, 2006
Revised Manuscript: August 3, 2006
Manuscript Accepted: August 4, 2006
Published: August 21, 2006

Binglin Miao, Caihua Chen, Ahmed Sharkway, Shouyuan Shi, and Dennis W. Prather, "Two bit optical analog-to-digital converter based on photonic crystals," Opt. Express 14, 7966-7973 (2006)

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