Performance of a compact, hybrid optical evanescent-wave sensor for chemical and biological applications
1996; Optica Publishing Group; Volume: 35; Issue: 4 Linguagem: Inglês
10.1364/ao.35.000676
ISSN0003-6935
AutoresH. Helmers, Pierre Greco, Rolf Rustad, Rochdi Kherrat, Gérard Bouvier, Pierre Bénech,
Tópico(s)Advanced Fiber Optic Sensors
ResumoWe describe a hybrid evanescent-wave sensor component that we fabricated by using an integrated optical interferometer with a specially adapted photodetector array. The design of the interferometer is based on the use of tapered waveguides to obtain two intersecting collimated beams. Phase shifts can be measured with an angular precision of better than 10(-3) rad, which corresponds to a superstrate index change inferior of 10(-6) with our structure. The interest in the device as a chemical sensor is experimentally demonstrated. The same optical component could be used in a variety of other sensor applications, e.g., biological and immunological sensors.
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