Non-destructive profilometry of optical nanofibres
Abstract
Single-mode optical nanofibres are a central component of a broad range of applications and emerging technologies. Their fabrication has been extensively studied over the past decade, but imaging of the final sub-micrometre products has been restricted to destructive or low-precision techniques. Here we demonstrate an optical scattering-based scanning method that uses a probe nanofibre to locally scatter the evanescent field of a sample nanofibre. The method does not damage the sample nanofibre and is easily implemented only using the same equipment as in a standard fibre puller setup. We demonstrate sub-nanometre radial resolution at video rates (0.7 nm in 10 ms) on single mode nanofibres, allowing for a complete high-precision profile to be obtained within minutes of fabrication. The method thus enables non-destructive, fast and precise characterisation of optical nanofibers, with applications ranging from optical sensors and cold atom traps to non-linear optics.
Cite
@article{arxiv.1606.04064,
title = {Non-destructive profilometry of optical nanofibres},
author = {Lars S. Madsen and Christopher Baker and Halina Rubinsztein-Dunlop and Warwick P. Bowen},
journal= {arXiv preprint arXiv:1606.04064},
year = {2017}
}