A novel miniature integrated-optical sensor for versatile multichannel applications is described. Wavelength-modulation techniques using laser diodes (vertical-cavity surface-emitting lasers) are used to interrogate multiple-waveguide sensing regions on a single integrated-optical chip for accurate measurement of effective refractive-index changes at a high data rate. With the experimental miniature sensor system, a resolution of DN(PP) = 10(-7) (short term, peak to peak) of the effective refractive index was demonstrated. In terms of surface-mass coverage, this resolution corresponds to D?(PP) = 130 fg/mm(2).
CITATION STYLE
Wiki, M., & Kunz, R. E. (2000). Wavelength-interrogated optical sensor for biochemical applications. Optics Letters, 25(7), 463. https://doi.org/10.1364/ol.25.000463
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