All-fibre wavefront sensor
Thomas A. Wright, Stephanos Yerolatsitis, Kerrianne Harrington, Robert, J. Harris, Tim A. Birks
TL;DR
This paper introduces a novel all-fibre wavefront sensor using a tapered three-core optical fibre that converts phase information into intensity data for tip-tilt measurement, suitable for adaptive optics and astronomy.
Contribution
The paper presents a new fibre-based wavefront sensor design that simplifies phase measurement and is compatible with remote detection, advancing adaptive optics technology.
Findings
Effective tip-tilt measurement with minimal information
Compatible with remote detector arrays
Validated for astronomical adaptive optics applications
Abstract
We report on a tapered three-core optical fibre that can be used as a tip-tilt wavefront sensor. In this device, a coupled region of a few millimetres at the sensing tip of the fibre converts fragile phase information from an incoming wavefront into robust intensity information within each of the cores. The intensity information can be easily converted to linear wavefront error over small ranges, making it ideal for closed loop systems. The sensor uses minimal information to infer tip-tilt and is compatible with remote detector arrays. We explore its application within adaptive optics and present a validation case to show its applicability to astronomy.
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