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Organic Semiconductor Lasers as Integrated Light Sources for Optical Sensors 283
FIGURE 7.16 Scheme of different fl uorescence detection methods.
FIGURE 7.17 Schemes of Mach-Zehnder interferometers.
analyte (upper part of figure) or is otherwise coupled to an
analyte (lower part of figure) in a second waveguide. After
traveling the different paths, the two beams interfere. The dif-
ference in optical path length results in a characteristic change
of intensity due to the interference of both beams.
