A connection structure for optical microcomponents

Abstract

The present invention discloses a connection structure for optical micro-components, comprising a first optical glass element and a second optical glass element. The structure is characterized in that a ring-shaped optical fiber rod is nested at the joint connection between the first and second optical glass elements, and the optical fiber rod abuts the connecting end faces of the first and second optical glass elements, respectively; and the optical fiber rod is coated with a layer of cured adhesive that connects the first and second optical glass elements. This structure significantly improves the temperature performance of the connection structure because the optical fiber rod and the optical glass elements on either side have similar expansion coefficients, and because the optical fiber rod fills the connection location, the amount of UV adhesive required is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber communication, and in particular to a connection structure of optical micro-elements. Background Art

[0002] like Figure 1 As shown, in the prior art, the lens of the collimator and the optical fiber head are directly bonded (without transition). After the device indicators are adjusted, ultraviolet (UV) glue is directly applied around the lens and the optical fiber head to fix them. In order to make the joint structure of the device firm, more UV glue needs to be applied to form a protrusion (hemispherical). However, due to the large difference in expansion coefficient between the glass components such as the lens and the optical fiber head and the glue, the temperature performance of devices with this type of structure is poor, and generally the temperature-dependent loss (TDL) is large. Summary of the Invention

[0003] The object of the present invention is to provide a connection structure of optical micro-elements with good temperature performance.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A connection structure for optical micro-elements includes a first optical glass element and a second optical glass element. A ring-shaped optical fiber rod is nested at the joint connection between the first and second optical glass elements, and the optical fiber rod abuts the connecting end faces of the first and second optical glass elements respectively; the optical fiber rod is coated with a cured adhesive layer that connects the first and second optical glass elements.

[0006] Furthermore, a wedge-shaped surface is provided on the connecting end surface of the first optical glass element and the second optical glass element, and the optical fiber round rod is sleeved on the wedge-shaped surface; or a wedge-shaped surface is provided on the connecting end surface of the first optical glass element or the second optical glass element, and the optical fiber round rod is sleeved on the wedge-shaped surface.

[0007] Furthermore, the curing adhesive layer adopts UV adhesive.

[0008] As an embodiment, the first optical glass element is a lens of a collimator, and the second optical glass element is an optical fiber head of the collimator.

[0009] As another embodiment, the first optical glass element is an outer sleeve of a collimator, and the second optical glass element is a bonding sleeve of the collimator.

[0010] The present invention adopts the above technical solution, adds an optical fiber rod at the joint connection of two optical glass elements, and then applies UV glue around the optical fiber rod. Since the expansion coefficient of the optical fiber rod and the optical glass elements on both sides is similar, and the connection position is filled with the optical fiber rod, the amount of UV glue applied is greatly reduced, so the temperature performance of the connection structure can be significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments;

[0012] Figure 1 The connection structure between the collimator lens and the optical fiber head in the prior art;

[0013] Figure 2 This is a schematic structural diagram of Example 1 of the present invention;

[0014] Figure 3 This is a schematic structural diagram of Example 2 of the present invention;

[0015] Figure 4 is a schematic diagram of the present invention applied to an isolator;

[0016] Figure 5 Schematic diagram of the present invention applied to a WDM structure. DETAILED DESCRIPTION

[0017] like Figure 2 or Figure 3 As shown, the present invention provides a connection structure for optical micro-elements, comprising a first optical glass element 1 and a second optical glass element 2. An annular optical fiber rod 3 is nested at the joint connection between the first optical glass element 1 and the second optical glass element 2, and the optical fiber rod 3 abuts against the connection end faces of the first optical glass element 1 and the second optical glass element 2, respectively; the optical fiber rod 3 is coated with a curing adhesive layer 4 that connects the first optical glass element 1 and the second optical glass element 2, and the curing adhesive layer 4 preferably uses UV adhesive.

[0018] Example 1, as Figure 2 As shown, the first optical glass element 1 is the lens of the collimator, and the second optical glass element 2 is the optical fiber head of the collimator; a wedge angle surface 5 is provided on the connecting end surface of the lens and the optical fiber head, and the optical fiber rod 3 is sleeved on the wedge angle surface 5. This design facilitates the placement of the optical fiber rod 3 and can maintain effective line contact.

[0019] Example 2, as Figure 3As shown, the first optical glass element 1 serves as the collimator's outer sleeve, while the second optical glass element 2 serves as the collimator's bonding sleeve. In this embodiment, a wedge-shaped surface 5 is provided on the connecting end face of the outer sleeve (the wedge-shaped surface 5 can also be provided on the bonding sleeve), and the optical fiber rod 3 is sleeved onto the wedge-shaped surface 5. This design facilitates the placement of the optical fiber rod 3 and maintains effective line contact.

[0020] From the outside, the connection structure of the present invention using optical fiber round rod to connect the optical glass elements on both sides can also be applied to isolators (such as Figure 4 as shown) and WDM structures (as Figure 5 shown).

[0021] The present invention adds an optical fiber rod to the joint connection of two optical glass elements, and then applies UV glue around the optical fiber rod. Since the expansion coefficient of the optical fiber rod and the optical glass elements on both sides is similar, and the connection position is filled with the optical fiber rod, the amount of UV glue applied is greatly reduced, so the temperature performance of the connection structure can be significantly improved.

[0022] The implementation of the present invention is described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are illustrative rather than limiting the present invention. Those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and description of the present invention.

Claims

1. An optical micro-component connection structure, comprising a first optical glass component and a second optical glass component, characterized in that: A ring-shaped optical fiber rod is nested at the joint connection between the first optical glass element and the second optical glass element, and the optical fiber rod is respectively in contact with the connecting end faces of the first optical glass element and the second optical glass element; The optical fiber round rod is coated with a cured adhesive layer connecting the first optical glass element and the second optical glass element; the optical fiber round rod is made of a material with a similar expansion coefficient to the first optical glass element and the second optical glass element.

2. The optical micro-component connection structure according to claim 1, characterized in that: A wedge-shaped surface is provided on the connecting end surface of the first optical glass element and the second optical glass element, and the optical fiber round rod is sleeved on the wedge-shaped surface; or a wedge-shaped surface is provided on the connecting end surface of the first optical glass element or the second optical glass element, and the optical fiber round rod is sleeved on the wedge-shaped surface.

3. The optical micro-component connection structure according to claim 1, wherein: The curing adhesive layer adopts UV adhesive.

4. The optical micro-component connection structure according to claim 1, wherein: The first optical glass element is a lens of a collimator, and the second optical glass element is an optical fiber head of the collimator.

5. The optical micro-component connection structure according to claim 1, characterized in that: The first optical glass element is an outer sleeve of the collimator, and the second optical glass element is a bonding sleeve of the collimator.

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