A monochromator with an all-fiber input and output interface

Abstract

The invention provides an all-optical fiber input-output-interface monochromator. The all-optical fiber input-output-interface monochromator includes the following components of: an input optical fiber used for inputting incident light, a high-pass linear variable filter which is used for reflecting short-wave light beams in the incident light, the wavelength of the short-wave light beams being shorter than selected wavelength; a low-pass linear variable filter which is used for reflecting long-wave light beams in the incident light, the wavelength of the long-wave light beams is longer than the selected wavelength; a first optical focusing element which is located in a light path and focuses the incident light; a second optical focusing element which is located in the light path and focuses light beams which pass through the low-pass linear variable filter or high-pass linear variable filter; an optical reflecting and focusing element assembly which is used for reflecting and focusing light beams which pass through the high-pass variable filter and the low-pass linear variable filter; a linear variable filter control system which is used for controlling the movement of the high-pass variable filter and the low-pass linear variable filter so as to make the linear variable filters located at specified positions and realize monochromatic filtering; and an output optical fiber which is used for outputting long-wave, short-wave and narrowband monochromatic light.

Description

technical field [0001] The invention relates to the field of spectrum analysis and the field of optical fiber components, in particular to a monochromator with an all-fiber input and output interface. Background technique [0002] At present, the dispersive elements of monochromators used in spectral measurement are mainly dispersive elements such as gratings and prisms. After dispersion, light of a certain wavelength generally forms a striped spot, which is difficult to focus into a small spot and output from the optical fiber. In addition, the output light of a commonly used monochromator is only one wavelength band, and the light of other wavelengths is treated as stray light and cannot be used. [0003] Therefore, there is an urgent need for a monochromator that is easy to focus and can output fiber optics, high contrast, and multiple output bands. Contents of the invention [0004] The object of the present invention is to provide a monochromator with optical fiber i...

AI Technical Summary

Problems solved by technology

[0002] At present, the dispersion elements of monochromators used in spectrum measurement are mainly dispersion elements such as gratings and prisms. After dispersion, light of a certain wavelength generally forms a striped spot, which is difficult to focus into a small spot and output from the optical fiber.

In addition, the commonly used monochromator emits only one wavelength band, and the light of other wavelengths is treated as stray light, which cannot be used

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