Abstract: The present disclosure provides an optical sensing device that comprises a plurality of optical light guide portions. Each optical light guide portion has a sensing region for sensing a property. The device further comprises a support for supporting the optical light guide portions and for positioning the optical light guide portions in a manner such that at least two sensing regions have a different radial positions around a portion of the support such that the optical device is arranged to sense a property at the different radial positions.

Abstract: The present disclosure provides an optical device comprising a first optical fiber portion having a first region and further regions between which the first region is positioned. The optical device also comprises a second optical fiber portion having a second region and further regions between which the second region is positioned. Further, the optical fiber comprises at least one member to which the first and second optical fiber portions are attached at the first and second regions. The first and second regions are positioned at opposite sides of an area defined between the first and second regions and spaced apart from each other by a first distance and wherein adjacent further regions are spaced apart by a second distance that is smaller than the first distance.

Abstract: The present disclosure provides an optical device comprising a first optical fibre portion having a first region and further regions between which the first region is positioned. The optical device also comprises a second optical fibre portion having a second region and further regions between which the second region is positioned. Further, the optical fibre comprises at least one member to which the first and second optical fibre portions are attached at the first and second regions. The first and second regions are positioned at opposite sides of an area defined between the first and second regions and spaced apart from each other by a first distance and wherein adjacent further regions are spaced apart by a second distance that is smaller than the first distance.