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An integrated optical sensor specifically sensitive to ozone has been developed by vacuum evaporating a tapered thin film of copper tetra-t-butylphthalocyanine (CuPc t ) through a mask onto a slab waveguide made by K + –Na + ion-exchange in glass. A pair of photoresist gratings fabricated on the waveguide offer the sensor a good long-term stability in optical coupling. The...
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