Polarisation control for optical nanofibres by imaging through a single lens

Abstract

We present a simple method for controlling the polarisation state of light at the waist of a single-mode optical nanofibre. The method consists of complete polarisation compensation based on imaging scattered light from inherent inhomogeneities both on the fibre surface and in the glass material itself. In contrast to the recently reported protocol exploiting two imaging systems oriented at 45 degrees to each other, our method requires only one lens and a video camera. It is particularly useful for nanofibre-based applications with severe geometric constraints, such as inside vacuum chambers for experiments with cold atoms. The measured fidelity of the achieved control is about 98\% using lenses with moderate numerical apertures.

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Cited by in corpus (3)

• Machine learner optimization of optical nanofiber-based dipole traps for cold ${}^{87}$Rb atoms
• State-Insensitive Trapping of Alkaline-Earth Atoms in a Nanofiber-Based Optical Dipole Trap
• Spin selection rule for {\it S} level transitions in atomic rubidium under paraxial and nonparaxial two-photon excitation