Sol-gel planar waveguide chemical sensors utilizing grating couplers

Aidan M. Doyle; Brian D. MacCraith

doi:10.1117/12.339790

23 February 1999 Sol-gel planar waveguide chemical sensors utilizing grating couplers

Aidan M. Doyle, Brian D. MacCraith

Proceedings Volume 3540, Chemical, Biochemical, and Environmental Fiber Sensors X; (1999) https://doi.org/10.1117/12.339790
Event: Photonics East (ISAM, VVDC, IEMB), 1998, Boston, MA, United States

Abstract

A novel, generic configuration for absorption-based optical sensors is presented. This technique utilizes embossed sol- gel glass derived gratings to couple LED light into and out of a planar waveguide. The power of the guided light is monitored as its evanescent field interrogates a dye-doped sol-gel sensor layer. This waveguiding arrangement is easy to manufacture and shows great potential for use in disposable, mass-produced sensor chips for a range of absorption-based sensing tasks. The sensor is then applied towards ammonia sensing in the ppm region.

Citation Download Citation

Aidan M. Doyle and Brian D. MacCraith "Sol-gel planar waveguide chemical sensors utilizing grating couplers", Proc. SPIE 3540, Chemical, Biochemical, and Environmental Fiber Sensors X, (23 February 1999); https://doi.org/10.1117/12.339790

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