| 摘要 |
The invention provides a pressure transducer having a cane waveguide geometry with "side-holes" in the cane cross-section that reduce the force required to compress the large diameter optical waveguide. The large diameter optical waveguide has a cross-section of at least about 0.3 millimeters, at least one inner core, a Bragg grating arranged therein, a cladding surrounding the inner core, and a structural configuration for providing a reduced bulk modulus of compressibility and maintaining the anti-buckling strength of the large diameter optical waveguide. The structural configuration reduces the cross sectional area of the large diameter optical waveguide. These side holes reduce the amount of glass that needs to be compressed, but retains the large diameter.
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