Single-arm double-mode double-order planar waveguide interferometric sensor.

  title={Single-arm double-mode double-order planar waveguide interferometric sensor.},
  author={Sergey S. Sarkisov and Darnell E. Diggs and Grigory Adamovsky and Michael J. Curley},
  journal={Applied optics},
  volume={40 3},
A sensor is described for which interference measurements of the phase delay between two propagating modes of different orders in a slab thin-film waveguide are used as the sensing technique. The basic building block of the sensor is a polymer film doped with an indicator dye such as Bromocresol Purple. The modes of two orders such as TM(0) and TM(1) are simultaneously excited in the light-guiding film with a focusing optics and a prism coupler. The modes are decoupled from the film and… CONTINUE READING


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