IWAO Design and Construction

IWAOs have been designed to address some of the weak points concerning absorbance optochemical sensors based on bulk optodes. In order to reach a practical application level, new research is needed to overcome some signifi- 

These novel sensors are conceived to optimize four essential characteristics that define a high-quality optochemical sensor enhanced and sizable sensitivity (depending on the free propagation region length) an adequate selectivity towards a certain analyte (regulated by an ionophore) low response time and minimization of interference effects caused by the solution matrix. The scheme is presented in Fig. 17. 

The basic structure is composed by a rib ARROW waveguide (as the input waveguide), an open region, where the bulk optode is deposited (as the 

Sllcon substrate. One-side polshed, W-Type, 4 dicrrieter. 500 im thick 2 cladding 2pm wet thermal silicon dioxide. n= 1.46 1 clodding 0.38pm LPCVD silicon nitilde. n=2.00 Core 4 urn PECVD silicon oxide. n=l. 48 

Fiber optics mounting on V- grooves and fiber-waveguide alignment 

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