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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 3 — Jan. 20, 2001
  • pp: 349–359

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

Sergey S. Sarkisov, Darnell E. Diggs, Grigory Adamovsky, and Michael J. Curley  »View Author Affiliations


Applied Optics, Vol. 40, Issue 3, pp. 349-359 (2001)
http://dx.doi.org/10.1364/AO.40.000349


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Abstract

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 TM0 and TM1 are simultaneously excited in the light-guiding film with a focusing optics and a prism coupler. The modes are decoupled from the film and recombined to produce an interference pattern in the face of an output optical fiber. The sensitivity of the sensor to the ambient temperature change is 1.5 °C, and the sensitivity to NH3 is 200 parts in 106 for one full oscillation of the signal.

© 2001 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(130.2790) Integrated optics : Guided waves
(130.3120) Integrated optics : Integrated optics devices
(130.6010) Integrated optics : Sensors

History
Original Manuscript: May 3, 2000
Revised Manuscript: September 22, 2000
Published: January 20, 2001

Citation
Sergey S. Sarkisov, Darnell E. Diggs, Grigory Adamovsky, and Michael J. Curley, "Single-arm double-mode double-order planar waveguide interferometric sensor," Appl. Opt. 40, 349-359 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-3-349

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