| 摘要 |
A planar optical waveguide with a liquid filled wave guiding region (2), which may be straight, coiled or otherwise folded, with filling channels (3) provided transversely along its length. The wave guiding region may be fabricated in a substrate (1) with a reservoir (22) on the substrate to facilitate filling through the filling channels. A Mach-Zhender configuration optical switch using a liquid filled waveguide is also described.
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