A gas sensor based on an integrated optical Mach-Zehnder interferometer (Record no. 50191)

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control field 20250625160143.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-16015
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Title A gas sensor based on an integrated optical Mach-Zehnder interferometer
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Volume/sequential designation Sensors and Actuators: B. Chemical, 7(1-3), p.672-676, 1992
520 3# - SUMMARY, ETC.
Summary, etc. In this paper we demonstrate a sensor system for measuring gaseous compounds using an integrated optical Mach-Zehnder interferometer (IO-MZ chip). One of the surface waveguide arms of the IO device is covered with a polysiloxane layer, sensitive to organic solvents. The refractive index of the polymer layer changes continuously when exposed to the vapours of such solvents. The influence on the evanescent field of the guided mode causes a change in the optical pathlength in the covered arm. Incoupled light of a semiconductor laser diode results in an interference pattern at the output of the IO-MZ chip. The phase shift of the signal is dependent on the gas concentration and the solvent type. We have determined the values for some hydrocarbons, chlorohydrocarbons and aromatic compounds. The extremely short response time of the system allows it to be used like a gas chromatographic detector. The applicationn of Maxwell's equations for the propagation of light in waveguides offers a simulation of the interference signals. By this means, the experimental signal obtained can be correlated to changes in refractive index of the polymer layer. The dependence of the interference patterns on wavelength is explained. White light interference is obtained by use of a xenon lamp. © 1992.
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Topical term or geographic name entry element INTEGRATED OPTICS--APPLICATIONS
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Topical term or geographic name entry element INTERFEROMETERS--DESIGN
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Topical term or geographic name entry element LASERS, SEMICONDUCTOR--EFFECTS
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Topical term or geographic name entry element POLYMERS--THIN FILMS
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Topical term or geographic name entry element WAVEGUIDES, OPTICAL--COATINGS
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Fabricius, N.
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Personal name Gauglitz, G.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Ingenhoff, J.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1n_bjHwWkPAIl4mDRKZZ7PYeFPjfvA-1s/view?usp=drivesdk">https://drive.google.com/file/d/1n_bjHwWkPAIl4mDRKZZ7PYeFPjfvA-1s/view?usp=drivesdk</a>
Public note Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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