阅读说明：本技术 一种非均分光分路器及其制备方法 (Non-equipartition optical splitter and preparation method thereof ) 是由 李雪峰 俞月琴 沈杰 夏国帅 朱伟冬 岳骁 宋柳蓉 于 2019-11-18 设计创作，主要内容包括：本发明公开了一种非均分光分路器,包括：单个光波导的输入；以及由所述单个光波导的输入至少两次分叉而形成的1XN结构的输出；N≥3,且为正整数；其中,每个光波导分叉处为1分2结构或者1分3结构,并且至少两个光波导分叉处的波导宽度和波导输出角度不同。同时,本发明还公开了一种非均分光分路器的制备方法。本发明非均分光分路器能够实现任意分光比,可靠性高。(The invention discloses a non-equipartition optical divider, which comprises: an input of a single optical waveguide; and an output of a 1XN structure formed by the at least two bifurcations of the input of the single optical waveguide; n is more than or equal to 3 and is a positive integer; wherein each optical waveguide bifurcation is of a 1-in-2 structure or a 1-in-3 structure, and the waveguide width and the waveguide output angle at least two optical waveguide bifurcations are different. Meanwhile, the invention also discloses a preparation method of the non-uniform splitter. The non-uniform splitter can realize any splitting ratio and has high reliability.)

1. An unequal optical splitter, comprising:

an input of a single optical waveguide; and

an output of a 1XN structure formed by the input of the single optical waveguide branching at least twice; n is more than or equal to 3 and is a positive integer;

wherein each optical waveguide bifurcation is of a 1-in-2 structure or a 1-in-3 structure, and the waveguide width and the waveguide output angle at least two optical waveguide bifurcations are different.

2. A method for manufacturing a non-uniform splitter is characterized by comprising the following steps:

branching at least twice from the input of a single optical waveguide to form the output of a 1XN structure; n is more than or equal to 3 and is a positive integer;

the waveguide width and waveguide output angle at the at least one optical waveguide bifurcation are varied.

3. The method of claim 2, wherein each optical waveguide branch is of a 1-in-2 configuration or a 1-in-3 configuration.

Technical Field

The invention relates to an optical splitter, in particular to a non-uniform optical splitter prepared by utilizing a planar optical waveguide technology.

Background

In the existing manufacturing process of the optical splitter, two technologies are provided, one is a tapering technology, and the other is a planar optical waveguide technology. In the manufacturing process of the tapered optical splitter, the proportion of the energy input from one end and distributed to two output ends of the light of the tapered optical splitter can be controlled at will, namely, the tapered optical splitter with any splitting ratio can be realized. However, due to the limitation of process reasons, only 1 input can be divided into 2 outputs, that is, a 1X2 structure, if a 1X4 structure needs to be realized, 3 discrete tapered devices need to be welded together, that is, 1X2 optical branches are welded and cascaded at the output end of 1X2, and so on, if a larger structure is needed, more welding cascades are needed, and the welding itself is very easy to damage, so that the devices cannot be used, so that the reliability of the tapered optical splitter product is very low.

At present, the prior art realizes an equal splitting ratio, changes the branching stage number, and utilizes the asymmetry of the structure to realize an uneven splitting optical splitter chip.

Disclosure of Invention

The invention aims to provide an uneven splitter and a preparation method thereof, which can realize any splitting ratio and have high reliability.

The technical scheme for realizing the purpose is as follows:

the invention provides a non-uniform splitter, comprising:

an input of a single optical waveguide; and

an output of a 1XN structure formed by the input of the single optical waveguide branching at least twice; n is more than or equal to 3 and is a positive integer;

wherein each optical waveguide bifurcation is of a 1-in-2 structure or a 1-in-3 structure, and the waveguide width and the waveguide output angle at least two optical waveguide bifurcations are different.

The second preparation method of the non-uniform splitter comprises the following steps:

branching at least twice from the input of a single optical waveguide to form the output of a 1XN structure; n is more than or equal to 3 and is a positive integer;

the waveguide width and waveguide output angle at the at least one optical waveguide bifurcation are varied.

Preferably, each optical waveguide branch is of a 1-in-2 structure or a 1-in-3 structure.

The invention has the beneficial effects that: the invention can prepare the optical splitter chip with high reliability, unequal splitting ratio and asymmetric structure by utilizing the planar optical waveguide bifurcation technology and simultaneously changing the waveguide width and the waveguide output angle at the optical waveguide bifurcation.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a non-uniform splitter according to the present invention;

fig. 2 is a schematic structural diagram of another embodiment of the non-uniform splitter according to the present invention.

Detailed Description

The invention will be further explained with reference to the drawings.

The invention provides a non-uniform splitter, comprising: an input of a single optical waveguide; and an output of the 1XN structure formed by the input of the single optical waveguide branching at least twice; n is not less than 3 and is a positive integer. Wherein each optical waveguide bifurcation is of a 1-in-2 structure or a 1-in-3 structure, and the waveguide width and the waveguide output angle at least two optical waveguide bifurcations are different.

As shown in fig. 1, in the 1X5 optical splitter including the 1X2 structure, each optical waveguide branch 100 has a 1-to-2 structure, and different splitting ratios can be realized by changing the waveguide width and the waveguide output angle of the optical waveguide branch 100.

As shown in fig. 2, in the 1X5 optical splitter including the 1X2 structure and the 1X3 structure, each optical waveguide branch 100 is a 1-in-2 structure or a 1-in-3 structure, and different splitting ratios can be achieved by changing the waveguide width and the waveguide output angle of the optical waveguide branch 100.

The second preparation method of the non-uniform splitter comprises the following steps:

firstly, branching at least twice from the input of a single optical waveguide to form the output of a 1XN structure; n is not less than 3 and is a positive integer. Each optical waveguide branch is of a 1-in-2 structure or a 1-in-3 structure. Thereby realizing the output of any 1XN structure and any splitting ratio.

And secondly, changing the waveguide width and the waveguide output angle at the bifurcation of at least one optical waveguide to realize different splitting ratios.

The planar optical waveguide technology is realized by using a chemical vapor deposition or ion exchange method, all optical waveguides in the chip are manufactured at one time and are an integral body, actions such as welding and the like are not needed, and the reliability is very high. Therefore, by utilizing the technology, the optical splitter chip with high reliability, unequal splitting ratio and asymmetric structure can be prepared by manufacturing the masks with different input and output structures and different splitting ratios.

The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.