阅读说明：本技术 一种光交叉互联组件 (Optical cross interconnection assembly ) 是由 郭会永 彭川 徐骏 石晓强 李亮 武学顺 徐耕 于 2019-04-28 设计创作，主要内容包括：本发明涉及一种光交叉互联组件。光交叉互联组件包括主板体和多个插芯部件,主板体内部设置有光交叉连接矩阵；插芯部件与光交叉连接矩阵通过光路连接,插芯部件包括插芯壳体和穿装在插芯壳体内的光纤,至少一个插芯部件内插装有模场扩大的光纤,部分插芯部件构成输入接口,部分插芯部件构成输出接口；模场直径扩大的光纤是指对接端处模场直径大于9μm的光纤。本发明中构成光交叉互联组件的输出接口和输入接口的插芯部件中,至少一个插芯部件采用模场直径扩大后的光纤,相较于普通光纤,对接偏离和灰尘对模场直径扩大后的光纤影响较小,能够显著提高光耦合效率和光纤端面的光损伤阈值,降低了光交叉互联组件的互联传输损耗。(The invention relates to an optical cross-connect module. The optical cross-connection assembly comprises a main board body and a plurality of ferrule parts, and an optical cross-connection matrix is arranged inside the main board body; the ferrule component is connected with the optical cross connection matrix through an optical path and comprises a ferrule shell and optical fibers penetrating into the ferrule shell, the optical fibers with expanded mode fields are inserted into at least one ferrule component, part of the ferrule components form an input interface, and part of the ferrule components form an output interface; an expanded mode field diameter fiber is one in which the mode field diameter at the butt end is greater than 9 μm. In the ferrule parts of the output interface and the input interface of the optical cross interconnection assembly, at least one ferrule part adopts the optical fiber with the expanded mode field diameter, compared with the common optical fiber, the optical fiber with the expanded mode field diameter is less influenced by butt joint deviation and dust, the optical coupling efficiency and the optical damage threshold of the end face of the optical fiber can be obviously improved, and the interconnection transmission loss of the optical cross interconnection assembly is reduced.)

1. An optical cross connect module, comprising:

the optical cross-connection matrix is arranged in the main board body;

the optical cross connection matrix comprises a plurality of ferrule components, a plurality of optical cross connection matrixes and a plurality of optical paths, wherein each ferrule component comprises a ferrule shell and an optical fiber which is arranged in the ferrule shell in a penetrating way;

an expanded mode field diameter fiber is a single mode fiber with a mode field diameter greater than 9 μm at the butt end.

2. The optical cross connect module of claim 1 wherein all of the optical fibers mounted within the ferrule assembly have a mode field diameter greater than 9 μm at the butt end.

3. The optical cross-connect module of claim 2 wherein the mode field diameter of the optical fiber at the butt end is 9 μm ~ 40 μm.

4. The optical cross connect assembly of claim 1, 2 or 3 wherein the ferrule member is a multi-core ferrule or a multi-core ferrule.

5. The optical cross connect assembly of claim 4 wherein said ferrule assembly is an MT plug.

6. The optical cross connect assembly of claim 1, 2 or 3 wherein the ferrule member is a fiber ferrule that is in fiber physical abutment with the mating ferrule member.

7. The optical cross connect assembly of claim 1, 2 or 3 wherein the ferrule member is mated to the mating ferrule member in a non-contact manner by a coating disposed at the mating end.

8. The optical cross connect assembly of claim 1, 2 or 3 wherein the ferrule member is non-contact mated with the mating ferrule member by a lens disposed at the mating end.

Technical Field

The invention relates to an optical cross-connect module.

Background

The optical cross-connect component is a fiber network node device, and can flexibly and effectively manage an optical transmission network by cross-connecting optical signals. The optical cross-connect module generally comprises a main board body, wherein an optical cross-connect matrix is arranged in the main board body, the main board body is provided with an input interface, an output interface and a management control unit which are connected with the optical cross-connect matrix, and the input interface and the output interface are mostly multi-core ferrule components.

The mode field diameter of the single-mode optical fiber for transmission in the multi-core ferrule is usually about 9 μm, in the actual coupling process of the optical fiber, due to the influence of the dust on the butt joint surface, the dimensional tolerance of the high-density optical fiber and the ferrule, the position tolerance of the lens and other factors, the optical fiber core is difficult to be completely centered and sensitive to the dust during coupling, the loss value is sharply increased when the 9 μm core diameter causes slight size deviation or dust enters the butt joint surface, and the loss value meeting the requirement is difficult to obtain after coupling, so that the interconnection transmission loss of the existing optical cross interconnection assembly is large.

Disclosure of Invention

The invention aims to provide an optical cross-connect assembly with low interconnection transmission loss.

In order to achieve the above purpose, the technical scheme of the optical cross-connect module of the present invention is as follows:

an optical cross-connect module comprising: the optical cross-connection matrix is arranged in the main board body; the optical cross connection matrix comprises a plurality of ferrule components, a plurality of optical cross connection matrixes and a plurality of optical paths, wherein each ferrule component comprises a ferrule shell and an optical fiber which is arranged in the ferrule shell in a penetrating way; an expanded mode field diameter fiber is a single mode fiber with a mode field diameter greater than 9 μm at the butt end.

The optical cross interconnection assembly has the beneficial effects that: in the ferrule parts of the output interface and the input interface of the optical cross interconnection assembly, at least one ferrule part adopts the optical fiber with the expanded mode field diameter, compared with the common optical fiber, the optical fiber with the expanded mode field diameter is less influenced by butt joint deviation and dust, the optical coupling efficiency and the optical damage threshold of the end face of the optical fiber can be obviously improved, and the interconnection transmission loss of the optical cross interconnection assembly is reduced.

Furthermore, the mode field diameter of the optical fibers arranged in all the ferrule parts at the butt joint end is larger than 9 μm, and the transmission loss can be effectively reduced by adopting the optical fibers with the expanded mode field diameters.

Further, the mode field diameter of the fiber at the butt end was 9 μm ~ 40 μm.

Furthermore, the core insert component is a multi-core insert or a multi-core insert. By adopting the multi-core ferrule or the multi-core ferrule, a plurality of optical fibers can be butted by one ferrule, so that the cost can be reduced.

Further, the ferrule component is an MT plug.

Furthermore, the ferrule component is an optical fiber ferrule which is in optical fiber physical butt joint with the adaptive ferrule component. The optical fiber ferrule directly performing physical butt joint has low cost.

Furthermore, the ferrule component realizes non-contact butt joint with the adaptive ferrule component through the coating film arranged at the butt joint end, and transmission loss can be reduced through the coating film.

Furthermore, the ferrule component realizes non-contact butt joint with the adaptive ferrule component through the lens arranged at the butt joint end, and transmission loss can be reduced through film coating.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of an optical cross connect assembly of the present invention;

FIG. 2 is a schematic diagram of the optical cross connect module according to an embodiment of the present invention, where the MT ferrule penetrating the optical fiber with an enlarged mode field diameter is connected to the adapted MT ferrule;

FIG. 3 is a schematic diagram of a ferrule assembly for non-contact docking via a ball lens according to another embodiment of the present invention;

description of reference numerals: 1-a ferrule member; 11-a ferrule housing; 12-optical fiber threading channel; 2-an optical fiber; 3-a main board body; 201-an optical fiber; 202-a ball lens; 203-light propagation path.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1, the optical cross connect module includes a main board body 3, an optical cross connect matrix is disposed inside the main board body 3, a ferrule assembly 1 connected to the optical cross connect matrix through an optical path is connected to the main board body 3 through an optical fiber 2, a part of the ferrule assembly 1 is located at one side of the main board body 3 to form an input interface of the optical cross connect module, and a part of the ferrule assembly 1 is located at the other side to form an output interface of the optical cross connect module.

The ferrule component 1 includes a ferrule housing 11, and a fiber insertion channel 12 for inserting and fixing the optical fiber 2 is provided in the ferrule housing 11, the ferrule component 1 in this embodiment is a multi-core ferrule, and the multi-core ferrule can butt-joint a plurality of optical fibers 2 in one ferrule component, so that the cost can be reduced, and in other embodiments, a multi-core ferrule can be selected. In other embodiments, the optical cross-connect matrix may also be partially implemented with single core ferrules. In this embodiment, the MT ferrule is specifically selected for the multi-core ferrule, and the optical fiber 2 penetrating through the ferrule member 1 is an optical fiber with an enlarged mode field diameter at the butt joint end, that is, a single-mode optical fiber with a mode field diameter larger than 9 μm at the butt joint end, compared with a conventional optical fiber with a mode field diameter of 9 μm, the optical fiber with an enlarged mode field diameter is less affected by butt joint deviation and dust, so that the optical coupling efficiency and the optical damage threshold of the optical fiber end face can be significantly improved, and the interconnection transmission loss of the optical cross interconnection module is reduced. In other embodiments, the ferrule assembly may also employ an MPO ferrule. In other embodiments, only part of the optical fibers in the ferrule member may be the optical fibers with the enlarged mode field diameter, and part of the optical fibers with the mode field diameter of 9 μm may be used. In this embodiment, the ferrule member 1 is directly physically butted when being butted with the adapted ferrule member, which results in lower cost. Of course, in other embodiments, as shown in fig. 3, a ball lens 202 may be disposed at the butt end of the optical fiber in the ferrule assembly, the optical fiber 201 has an enlarged mode field diameter at the butt end, and the optical fiber 201 in the ferrule assembly in the optical cross connect assembly and the adapted ferrule assembly are indirectly in non-contact butt joint through the ball lens 202, and an optical propagation path 203 is shown. In other embodiments, non-contact docking may also be performed by plating. The optical cross connect module in this embodiment may be connected actively or passively.

An optical fiber with an enlarged mode field diameter is a prior art, and a plurality of specific implementation methods are provided, for example, in "photonic crystal fiber mode field diameter increasing method" in volume 7 of volume 22, volume 7 of intense laser and particle beam issued in 7.2010, a common fused biconical taper machine is used for heating a photonic crystal fiber at one end, air in a heating part cladding of the photonic crystal fiber is collapsed and reduced due to the action of surface tension, the percentage of air in the cladding is reduced, so that the difference between the effective refractive index in the cladding and the refractive index of a fiber core is reduced, the constraint action on light is reduced, a guided mode in the fiber core is diffused outwards, and the mode field diameter and the effective mode field area are gradually enlarged. The optical fiber in this embodiment may also contain GeO₂The optical fiber of dopant, the butt joint end of the optical fiber is a thermal diffusion optical fiber formed by thermal diffusion, after thermal diffusion, GeO in the thermal diffusion optical fiber₂Ge atoms contained in the dopant are diffused, and the refractive index distribution of the dopant changes along the axis of the optical fiber, so that the mode field diameter is increased.