Determination of the variable core-to-surface spacing of single-mode fiber-coupler blocks.
A description is given of a method for exact determination of the variable core-to-surface spacing along the polished region of single-mode fiber-coupler blocks. It is based on throughput attenuation measurements made while covering the block surface gradually by a liquid with a known refractive index. Examples of the validity of the technique are given.
Leminger
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Zengerle
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