Spectrometer and method of making a spectrometer

Abstract

A spectrometer comprises a flat optical fibre having a length along a propagation direction for light input into the flat optical fibre, a width orthogonal to the length, a thickness less than the width and orthogonal to the length and the width, an input face bounded by the width and the thickness, and an output face bounded by the width and the length; an input optical fibre optically coupled to the input face to transmit incident light into the flat optical fibre along the propagation direction; and a scattering structure within the flat optical fibre configured to receive and scatter the incident light to create a speckle pattern via interference of the scattered incident light, a component of the speckle pattern being emitted for detection from the flat optical fibre through the output face along a direction orthogonal to the propagation direction.

Dependencies are inferred from the claim text.