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. 2007 Sep 11;4(1):53–79. doi: 10.1007/s10404-007-0223-y

Fig. 18.

Fig. 18

Four-waveguide integrated optical Young’s interferometer sensor. Waveguides 1, 2, and 3 are sensing arms, and waveguide 4 is the reference arm (Ymeti et al. 2007). Reproduced with permission from the American Chemical Society