By monitoring the wavelength-shift of Bragg-resonances in a fibre grating during cladding-etching, we measure the refractive-index of buffered-HF acid (20:1) as 1.36±0.005 @ 1.55μm, and use that to demonstrate precise control the fibre etch-diameter.
© 2015 Optical Society of America
This paper was not presented at the conference
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