Fibre coupled dual-mode waveguide interferometer with $λ$/130 fringe spacing

Details Fibre coupled dual-mode waveguide interferometer with $λ$/130 fringe spacing Fibre coupled dual-mode waveguide interferometer with $λ$/130 fringe spacing

2008-03-24

arxiv.org/abs/0803.3381v1

Physics

Optics

4 pages, 5 figures, accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.100.163901

Predictions and measurements of a multimode waveguide interferometer operating in a fibre coupled, ``dual-mode'' regime are reported. With a 1.32 micrometer source, a complete switching cycle of the output beam is produced by a 10.0 nanometer incremental change in the 8.0 micrometer width of the hollow planar mirror waveguide. This equates to a fringe spacing of $\sim\lambda /130$. This is an order of magnitude smaller than previously reported results for this form of interferometer.

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