Self-focusing fiber array used for integral field unit

Abstract

A self-focusing fiber array used for an integral field unit belongs to the field of astronomical photonics. A structure of the array includes a graded index fiber, a step type fiber, a quartz fixture,the graded index fiber and the step type fiber are fused to form a self-focusing fiber, a fusion point is located at an intersection point of the graded index fiber and light rays that is 1 / 4 pitch of the self-focusing fiber, and an optical fiber array is formed by staggered layer-by-layer arrangement. The self-focusing fiber array of the invention collects optical information through the self-focusing effect of the optical fiber itself, the problem that light cannot be coupled to an optical fiber core and cannot be transmitted does not exist, and through the structure, the process difficultyis reduced, complex operation of alignment of a micro lens and the fiber array is avoided, and the capability of collecting the optical information can also be increased.

Description

technical field [0001] The invention belongs to the field of astrophotonics, and in particular relates to a self-focusing optical fiber array used for an integral field of view unit. Background technique [0002] The function of the integral field unit (IFU) is to sample the source target in the two-dimensional field of view, and then send the energy of each sampling unit to the spectrometer, and simultaneously obtain the three-dimensional information of the source through a single exposure (spatial domain x, y and spectral domain λ). With the increase of telescope caliber and the application of adaptive optics technology, most of the IFUs used at home and abroad at present use microlens plus fiber bundle structure and fiber bundle structure. [0003] The integral field of view unit of the microlens array and fiber bundle structure uses a group of microlens arrays to divide the original field of view into several units, and then connects an optical fiber behind each microle...

AI Technical Summary

Problems solved by technology

However, the optical fiber in this patent only forms a linear array, and does not form a two-dimensional area array of M*N (M, N are integers), and scanning input is required when receiving area array information

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