Narrowband filter with optical fiber end face integrated heterogeneous material metasurface
By integrating a silicon-silicon nitride heterostructure meta-atom array into the fiber end face, the problems of integration and filtering bandwidth in traditional fiber filters are solved, and a fiber filter with high integration and narrowband filtering effect is realized.
Patent Information
- Application Number
- CN202520485581.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-19
AI Technical Summary
Traditional fiber optic filters have low integration, large size, and wide filtering bandwidth, making it difficult to meet the needs of modern high-precision, ultra-narrowband filtering.
By employing a single-mode fiber structure and a silicon-silicon nitride heterostructure meta-atom array, high integration and narrowband filtering effect are achieved by integrating the silicon-silicon nitride heterostructure meta-atom array at the fiber end face.
A highly integrated, low-size fiber optic filter has been developed, capable of effectively filtering specific wavelength bands, achieving a narrowband filtering effect with a center wavelength of 1600nm and a bandwidth of 40nm.
Smart Images
Figure CN223857440U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of photonics, more particularly to an optical component for realizing narrowband filtering function by integrating silicon-silicon nitride heterostructure metasurface on the end face of an optical fiber. BACKGROUND
[0002] Optical fiber filter is one of the basic key devices in wavelength division multiplexing optical communication system. With the rapid development of optical communication technology, optical fiber filter has become an indispensable part in optical fiber communication. In the field of optical fiber communication, optical fiber filter is widely used in wavelength selection, optical signal separation, optical noise filtering and other aspects in optical transmission system.
[0003] Traditional optical fiber filter mostly adopts thin film F-P cavity type tunable filter, which uses the linear interval of reflection or transmission curve to construct linear filter. However, such filter has problems of relatively low integration, large size and relatively wide filter bandwidth, which is difficult to meet the demand of modern high-precision and extremely narrowband filtering. Therefore, there is still a large exploration space for the research of optical fiber filter device with higher integration, smaller size and narrower filtering effect. SUMMARY
[0004] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the utility model.
[0005] To solve the problems raised in the background art, the utility model adopts the following technical solutions:
[0006] A narrowband filter with optical fiber end face integrated heterostructure metasurface, comprising a single-mode optical fiber structure and a silicon-silicon nitride heterostructure superatom array, wherein the single-mode optical fiber structure end face is provided with a silicon-silicon nitride heterostructure superatom array.
[0007] As a preferred technical solution of the utility model, the silicon-silicon nitride heterostructure superatom array is composed of multiple groups of 12*12 silicon-silicon nitride heterostructure superatoms arranged at equal intervals.
[0008] As a preferred technical solution of the utility model, the silicon-silicon nitride heterostructure superatom is composed of a silicon structure and a silicon nitride structure, and the silicon nitride structure is arranged on the surface of the silicon structure.
[0009] As a preferred technical scheme of the utility model, the silicon structure length is 0.406mu m, the width is 0.58mu m, the height is 0.5mu m, the silicon nitride structure length is 0.174mu m, the width is 0.58mu m, the height is 0.5mu m, and the spacing period between each silicon-silicon nitride heterostructure superatom is 0.74mu m.
[0010] As a preferred technical scheme of the utility model, the single mode optical fiber structure is a cylinder with a core diameter of 9mu m and a cladding diameter of 128mu m, and the material is silica.
[0011] As a preferred technical scheme of the utility model, when the single mode optical fiber structure transmits light in the 1500nm-1700nm wave band, the light passes through a group of silicon-silicon nitride heterostructure superatom arrays and outputs a wave band with a center wavelength of 1600nm and a bandwidth of 40nm, thereby realizing filtering of light waves in a specific wave band.
[0012] Compared with the prior art, the utility model has the beneficial effects that:
[0013] In the utility model, a silicon-silicon nitride heterostructure superatom array is arranged, a plurality of silicon-silicon nitride heterostructure superatoms are arranged at a specific spacing, and the silicon-silicon nitride heterostructure superatom array is installed at the middle end position of the single mode optical fiber structure end face. The single mode optical fiber structure end space is reasonably used, the product has the advantages of small space size and high integration, and the silicon-silicon nitride heterostructure superatom array is used to realize filtering of light waves in a specific wave band. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a schematic view of the narrowband filter of the utility model on the xy plane.
[0015] Figure 2 It is a perspective view of the silicon-silicon nitride heterostructure superatom structure of the utility model.
[0016] Figure 3 It is a three-dimensional effect view of the narrowband filter of the utility model.
[0017] Figure 4 It is the simulation output result of the narrowband filter of the utility model.
[0018] The correspondence between the annotations of the drawings and the component names in the drawings is as follows:
[0019] 1, single mode optical fiber structure, 2, silicon-silicon nitride heterostructure superatom array, 3, silicon-silicon nitride heterostructure superatom, 4, silicon structure, 5, silicon nitride structure. Detailed Implementation
[0020] To make the above-mentioned objectives, features and advantages of this utility model clearer and easier to understand, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0022] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. The present invention provides the following embodiments.
[0023] Depend on Figure 1 As shown, this is a schematic diagram of the components in this embodiment, including a single-mode fiber structure 1 and a silicon-silicon nitride heterostructure meta-atom array 2. The silicon-silicon nitride heterostructure meta-atom array 2 is installed on the end face of the single-mode fiber structure 1. The silicon-silicon nitride heterostructure meta-atom array 2 is composed of multiple sets of equidistantly arranged 12*12 silicon-silicon nitride heterostructure meta-atoms 3. The single-mode fiber structure 1 is a cylinder with a core diameter of 9μm and a cladding diameter of 128μm, and the material is silicon dioxide. In use, after the multiple sets of silicon-silicon nitride heterostructure meta-atoms 3 are equidistantly arranged and spliced, the complete silicon-silicon nitride heterostructure meta-atom array 2 is formed. The silicon-silicon nitride heterostructure meta-atom array 2 is installed at the center of the end face of the single-mode fiber structure 1.
[0024] From the appendix Figure 2 As shown, this is a schematic diagram of the silicon-silicon nitride heterostructure metaatom 3 in this embodiment. The silicon-silicon nitride heterostructure metaatom 3 is composed of silicon structure 4 and silicon nitride structure 5. The silicon structure 4L1 is 0.406 μm, W is 0.58 μm, and H is 0.5 μm. The silicon nitride structure 5L2 is 0.174 μm, W is 0.58 μm, and H is 0.5 μm. The spacing period between each silicon-silicon nitride heterostructure metaatom 3 is 0.74 μm.
[0025] From the appendix Figure 4As shown, when the single-mode optical fiber structure 1 transmits light in the 1500nm-1700nm wave band, the light will be output after passing through the group of silicon-silicon nitride heterostructure superatom arrays 2, with a center wavelength of 1600nm and a bandwidth of 40nm, thereby realizing filtering of light waves in a specific wave band.
[0026] The above is a further detailed description of the utility model in combination with the specific implementation, and cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can also be made, and all should be regarded as belonging to the protection range determined by the claims submitted by the utility model.
Claims
1. A narrowband filter based on fiber end-face integrated hetero-material metasurface, characterized in that, Including single mode optical fiber structure (1) and silicon-silicon nitride heterostructure superatom array (2), the single mode optical fiber structure (1) end face is installed with silicon-silicon nitride heterostructure superatom array (2).
2. The fiber endface integrated hetero-material metasurface narrowband filter of claim 1, wherein: The silicon-silicon nitride heterostructure superatom array (2) is composed of multiple groups of 12*12 silicon-silicon nitride heterostructure superatoms (3) arranged at equal intervals.
3. The fiber endface integrated hetero-material metasurface narrowband filter of claim 2, wherein: The silicon-silicon nitride heterostructure superatom (3) is composed of a silicon structure (4) and a silicon nitride structure (5), and the silicon nitride structure (5) is arranged on the surface of the silicon structure (4).
4. The fiber endface integrated heteromaterial metasurface narrowband filter of claim 3, wherein: The silicon structure (4) has a length of 0.406 μm, a width of 0.58 μm, and a height of 0.5 μm, and the silicon nitride structure (5) has a length of 0.174 μm, a width of 0.58 μm, and a height of 0.5 μm, and the spacing period between each silicon-silicon nitride heterostructure superatom (3) is 0.74 μm.
5. The fiber endface integrated heteromaterial metasurface narrowband filter of claim 1, wherein: The single mode optical fiber structure (1) is a cylinder with a core diameter of 9 μm and a cladding diameter of 128 μm, and the material is silica.
6. The fiber endface integrated heteromaterial metasurface narrowband filter of claim 1, wherein: When the single mode optical fiber structure (1) transmits light in the 1500-1700 nm wave band, the light will output a wave band with a center wavelength of 1600 nm and a bandwidth of 40 nm after passing through a group of silicon-silicon nitride heterostructure superatom arrays (2), thereby effectively filtering light waves of a specific wave band.