CN-224231998-U - Light beam splitting structure

CN224231998UCN 224231998 UCN224231998 UCN 224231998UCN-224231998-U

Abstract

The utility model provides a light beam splitting structure, which comprises an optical waveguide, a light source, a light receiving unit and a light receiving unit, wherein the optical waveguide is provided with a light input end and a light output end, and at least one light leakage area is arranged on a part between the light input end and the light output end, and each light leakage area is used for leaking out part of light transmitted in the optical waveguide. Therefore, the beam splitting of light is realized, the beam splitting structure of light is greatly simplified, the size of the optical waveguide is smaller, the size and the position of a light leakage area can be flexibly adjusted according to the needs in a micron level generally, and the application of the light leakage area in an integrated and miniaturized sensor can be realized. And filling a filler with a set refractive index or an adjustable refractive index in the light leakage area, and further regulating the collection efficiency or the light outlet proportion of the leaked light by changing the refractive index of the light, so as to realize flexible regulation and control of the light intensity.

Inventors

ZHANG SHAOCHUN
ZHAO BOWEN
LIU XINYU
CHEN DAOYUAN
BAI QIULI
Fu tianyue

Assignees

安徽省国盛量子科技有限公司

Dates

Publication Date: 20260512
Application Date: 20240826

Claims (10)

1. A light splitting structure includes an optical waveguide having a light input end and a light output end, and at least one light leakage region is provided on a portion between the light input end and the light output end, each light leakage region being for leaking out a portion of light transmitted in the optical waveguide.
2. The light-splitting structure according to claim 1, wherein the light-leaking region is formed by changing a shape of an interface between the core layer and the cladding layer, or is formed by exposing at least a part of a cross section of the cladding layer to the outside, or is formed by exposing an outer surface of the core layer to the outside, or is formed by exposing at least a part of a cross section of the core layer to the outside.
3. The light-splitting structure as recited in claim 2, wherein the light-leaking region is formed by changing the shape of the interface between the core layer and the cladding layer, the shape being changed to an hourglass shape or a tapered shape.
4. The light beam splitting structure according to claim 1, wherein the light leakage area and/or the light output end is/are provided with a light focusing structure for focusing the light emitted therefrom.
5. The light beam-splitting structure according to claim 4, wherein the light-condensing structure is a light-condensing lens.
6. The light beam-splitting structure of claim 4, wherein the light-gathering structure is a cavity structure having an opening, and wherein a cavity wall of the cavity structure is configured to reflect light incident thereon.
7. The light-splitting structure of claim 1, wherein the light-leaking region is filled with a filler having a predetermined refractive index.
8. The light beam splitting structure of claim 7, wherein the refractive index of the filler changes with temperature, and a temperature control member is provided for controlling the temperature of the filler.
9. The light beam splitting structure of claim 8, wherein the filler is one of water, glycerol, ethanol, methanol, liquid paraffin, vegetable oil, polydimethylsiloxane, and optical cement.
10. The light beam splitting structure according to any one of claims 7 to 9, wherein the light leakage area filled with the filler is disposed in a closed cavity, and the closed cavity is made of a light-transmitting material.

Description

Light beam splitting structure Technical Field The utility model relates to the field of optical sensing, in particular to a light beam splitting structure. Background In the field of optical sensing, for example, when a quantum sensor splits light, a beam splitter or an optical fiber beam splitter is often adopted in the prior art to split light, and the beam splitter or the beam splitter occupies a large volume and cannot be applied to a miniaturized and high-integration sensor. When the beam splitter is used for beam splitting, in order to prevent the light after beam splitting from interfering with each other, when space light transmission is used, a longer-distance light transmission distance is needed after beam splitting, so that the occupied space of a light path is increased, even if the optical fiber transmission is used, a fixed structure is needed to be arranged at the beam splitter to facilitate light coupling into the optical fiber, the size of the light path structure is larger, the flexibility is poor, the optical fiber beam splitter still occupies a larger space although being relatively flexible, and the light needs to be guided into the beam splitting optical fiber to realize separation, and the noise is increased and the stability is poor due to the propagation of the light in the beam splitting optical fiber. How to simplify the light splitting structure is a technical problem to be solved. Disclosure of utility model In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide an optical beam splitting structure, which is used for solving the problems of the prior art that the optical beam splitting structure occupies a large space and is unfavorable for being applied to miniaturized sensors. To achieve the above and other related objects, the present utility model provides an optical beam splitting structure including an optical waveguide having an optical input end and an optical output end, and at least one light leakage region provided on a portion between the optical input end and the optical output end, each light leakage region for leaking out a portion of light transmitted in the optical waveguide. Further, the light leakage region is formed by changing the shape of the interface of the core layer and the cladding layer, or by exposing at least a portion of the cross section of the cladding layer to the outside, or by exposing the outer surface of the core layer to the outside, or by exposing at least a portion of the cross section of the core layer to the outside. Further, when the light leakage region is formed by changing the shape of the interface between the core layer and the cladding layer, the shape is changed to an hourglass shape or a tapered shape. Furthermore, a light condensing structure is arranged at the light leakage area and/or the light output end and used for condensing the emergent light. Further, the light condensing structure is a light condensing lens. Further, the light focusing structure is a cavity structure having an opening, and a cavity wall of the cavity structure is configured to reflect light incident thereon. Further, the light leakage area is filled with a filler, and the filler has a set refractive index. Further, the refractive index of the filler changes along with the change of temperature, and a temperature regulating control is arranged for regulating the temperature of the filler. Further, the filler is one of water, glycerol, ethanol, methanol, liquid paraffin, vegetable oil, polydimethylsiloxane and optical cement. Further, the light leakage area filled with the filler is arranged in the closed cavity, and the closed cavity is made of a light-transmitting material. As described above, the light beam splitting structure of the present utility model has the following beneficial effects: 1. By arranging at least one light leakage area between the light input end and the light output end of the light waveguide, part of light transmitted in the light waveguide leaks from each light leakage area, so that light splitting is realized, the light splitting structure is greatly simplified, the size of the light waveguide is smaller, the size and the position of the light leakage area can be flexibly adjusted as required generally in a micron level, and the application of the light leakage area in an integrated and miniaturized sensor can be realized; 2. and filling a filler with a set refractive index or an adjustable refractive index in the light leakage area, and further regulating the collection efficiency or the light outlet proportion of the leaked light by changing the refractive index of the light, so as to realize flexible regulation and control of the light intensity. Drawings FIG. 1 is a schematic view of a first structure of a light splitting structure according to the present utility model; FIG. 2 is a schematic diagram showing a second structure of the light splitting structure of th