A pluggable fiber optic FA-CPO interface optical assembly

Abstract

This utility model relates to a pluggable fiber optic FA-CPO interface optical component. A light-transmitting hole is formed on the side of a vertically distributed side plate in the support, corresponding to each optical channel of the fiber array. A positioning hole is formed at a predetermined position on each side of the area with the light-transmitting hole. A guide pin is inserted into each positioning hole. The positional accuracy of the positioning hole is ±3μm, and the cylindricity accuracy of the guide pin is ±0.5μm. A collimating lens array is fixed to the optical surface end of the fiber array and coupled to its optical channels. The fiber array is fixed on the support at a position determined by active coupling. The relative positional accuracy between the fiber array and the guide pin is less than 5μm. The advantages are: the pluggable fiber optic FA-CPO interface optical component has high precision, with a final precision of less than 5μm, which meets the requirements for CPO pluggable applications. Compared to the precision requirement of less than 50μm in the prior art, this represents an order of magnitude improvement in precision.

Description

Technical Field

[0001] This utility model relates to the field of optical component technology, specifically to a pluggable fiber optic FA-CPO interface optical component. Background Technology

[0002] CPO requires pluggable fiber optic FA-CPO interface optical components to have a pluggable precision of less than 50μm. However, the structure of traditional pluggable fiber optic FA-CPO interface optical components is relatively complex, making it difficult to ensure precision stability after multiple plugging and unplugging, resulting in poor precision. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a pluggable fiber optic FA-CPO interface optical component to overcome the shortcomings of the prior art.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A pluggable fiber optic FA-CPO interface optical component includes: a bracket, a collimating lens array, and a fiber array. A light-transmitting hole is formed on the side of a vertically distributed side plate of the bracket at each optical channel of the corresponding fiber array. A positioning hole is formed at a predetermined position on each side of the area with the light-transmitting hole. A guide pin is inserted into each positioning hole. The positional accuracy of the positioning hole is ±3μm, and the cylindricity accuracy of the guide pin is ±0.5μm. The collimating lens array is fixed to the optical surface end of the fiber array and coupled to each of its optical channels. The fiber array is fixed on the bracket at a position determined by active coupling. The relative positional accuracy between the fiber array and the guide pin is less than 5μm.

[0005] Based on the above technical solution, the present invention can be further improved as follows.

[0006] Furthermore, both the stent and the guide pin are made of metal.

[0007] Furthermore, the guide pin is fixed to the side plate in the bracket by laser welding.

[0008] Furthermore, the support structure is made of Kovar alloy.

[0009] Furthermore, the support includes: a substrate distributed laterally and side plates on the upper surface of the substrate, the side plates being distributed vertically, the support having an L-shaped structure, and the fiber array being fixed on the upper surface of the substrate at a position determined by active coupling.

[0010] Furthermore, the collimating lens array is bonded to the optical end of the fiber array.

[0011] Furthermore, the fiber array is glued to a predetermined position on the upper surface of the substrate in the support.

[0012] Furthermore, the adhesive is a UV adhesive.

[0013] The beneficial effects of this utility model are: 1) The pluggable fiber optic FA-CPO interface optical components have high precision, with a final precision of less than 5μm, which can meet the CPO pluggable application. Compared with the existing technology with a precision requirement of less than 50μm, the precision is an order of magnitude higher. 2) The bracket is made of metal, the guide pin is made of metal, and the guide pin is fixed to the side plate in the bracket by laser welding, so that the pluggable fiber optic FA-CPO interface optical component can withstand high temperature and can be plugged and unplugged multiple times. 3) The bracket is made of Kovar alloy, which is a magnetic material and can be used in magnetic non-contact CPO optical plug-in system (the CPO silicon photonic engine side has strong magnetic material). Attached Figure Description

[0014] Figure 1 This is a top view of the pluggable fiber optic FA-CPO interface optical component of this utility model; Figure 2 This is a front view of the pluggable fiber optic FA-CPO interface optical assembly of this utility model; Figure 3 This is a side view of the bracket in this utility model; Figure 4 This is a flowchart illustrating the process of determining the position of the fiber optic array in this invention.

[0015] The attached diagram lists the components represented by each number as follows: 1. Support, 110. Side plate, 111. Light passage hole, 112. Positioning hole, 120. Substrate, 2. Collimating lens array, 3. Fiber optic array, 4. Guide pin. Detailed Implementation

[0016] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0017] Example 1 like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a pluggable fiber optic FA-CPO interface optical assembly includes: The support includes a bracket 1, a collimating lens array 2, and an optical fiber array (FA) 3. On the side of the vertically distributed side plate 110 in the bracket 1, a light-transmitting hole 111 is opened at each optical channel of the corresponding optical fiber array 3. This can be understood as follows: each light-transmitting hole 111 on the side plate 110 corresponds to a bare optical fiber in each optical channel of the optical fiber array 3. If the center-to-center distance between any two adjacent optical channels in the optical fiber array 3 is the same, then it can be understood that the center-to-center distance between two adjacent light-transmitting holes 111 is equal to the center-to-center distance between two adjacent optical channels of the optical fiber array 3. The number of light-transmitting holes 111 is the same as the number of optical channels in the optical fiber array 3. For example, if the optical fiber array 3 has eight optical channels, then the number of light-transmitting holes 111 is eight; if the optical fiber array 3 has four optical channels, then the number of light-transmitting holes 111 is four. The above two cases are merely exemplary examples. On the side plate 110, a positioning hole 112 is opened at a predetermined position on both sides of the area with the light-transmitting hole 111. A guide pin 4 is inserted into each positioning hole 112. The two guide pins 4 are distributed in parallel. The positional accuracy of the positioning hole 112 is ±3μm, and the cylindricity accuracy of the guide pin 4 is ±0.5μm. The collimating lens array 2 is fixed on the optical surface end of the fiber array 3, and the collimating lens array 2 is coupled to each optical channel of the fiber array 3. This can be understood as: the collimating lens array 2 is coupled to the bare optical fiber in each optical channel of the fiber array 3 respectively. The fiber array 3 is fixed on the bracket 1 at the position determined by active coupling. The relative positional accuracy between the fiber array 3 and the guide pin 4 is less than 5μm.

[0018] During processing, first open the optical aperture 111 and the positioning hole 112, then install the guide pin 4, then fix the collimating lens array 2 on the optical surface end of the fiber array 3. Finally, when determining the installation position of the fiber array 3, the following method can be used to confirm it: A high-precision ferrule is inserted into two guide pins 4. Then, an external light source is connected to the optical fiber inside the high-precision ferrule, and an optical power meter is connected to the optical fiber inside the fiber array 3. The position of the fiber array 3 is adjusted so that the emitted light from the external light source passes through the high-precision ferrule, the light-passing hole 111, and the collimating lens array 2 in sequence before being coupled into the bare optical fiber in each optical channel of the fiber array 3. When the readings of all optical power meters are at their maximum at the same time, this position is the installation position of the fiber array 3. Then, the fiber array 3 is fixed. At this time, the relative positional accuracy between the fiber array 3 and the high-precision ferrule is less than 1μm. In addition, since the positional accuracy of the positioning hole 112 is ±3μm and the cylindricity accuracy of the guide pin 4 is ±0.5μm, the final relative positional accuracy between the fiber array 3 and the guide pin 4 is less than 5μm.

[0019] Example 2 like Figure 1 , Figure 2 , Figure 3As shown, this embodiment is a further improvement on embodiment 1, as detailed below: The bracket 1 is made of metal, and the guide pin 4 is also made of metal. The guide pin 4 is fixed to the side plate 110 in the bracket 1 by laser welding, which makes the pluggable fiber optic FA-CPO interface optical component resistant to high temperature and can be plugged and unplugged multiple times. When welding the guide pin 4, the high-precision ferrule can be inserted into the two guide pins 4 first, and then the welding work can be carried out. This can ensure accuracy.

[0020] The preferred material for bracket 1 is Kovar alloy, which is a magnetic material that can be used in magnetic non-contact CPO optical plug-in systems (the CPO silicon photonic engine side has a strong magnetic material).

[0021] Furthermore, the support 1 includes a substrate 120 and a side plate 110, wherein the substrate 120 is distributed laterally, the side plate 110 is distributed vertically, the side plate 110 is located on the upper surface of the substrate 120, the support 1 has an L-shaped structure, and the fiber array 3 is fixed on the upper surface of the substrate 120 at a position determined by active coupling.

[0022] Example 3 like Figure 1 , Figure 2 As shown, this embodiment is a further improvement on embodiment 1 or 2, as detailed below: The collimating lens array 2 is bonded to the optical end of the fiber array 3. The fiber array 3 is bonded to a predetermined position on the upper surface of the substrate 120 in the support 1 using adhesive, wherein the adhesive is preferably a UV adhesive.

[0023] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pluggable fiber optic FA-CPO interface optical assembly, characterized in that, include: The bracket (1), collimating lens array (2), and fiber array (3) are provided. On the side of the vertically distributed side plate (110) in the bracket (1), a light-transmitting hole (111) is opened at each optical channel of the corresponding fiber array (3). On the side plate (110), a positioning hole (112) is opened at a predetermined position on both sides of the area with the light-transmitting hole (111). A guide pin (4) is inserted into each positioning hole (112). The positional accuracy of the positioning hole (112) is ±3μm, and the cylindricity accuracy of the guide pin (4) is ±0.5μm. The collimating lens array (2) is fixed on the optical surface end of the fiber array (3) and coupled to each optical channel therein. The fiber array (3) is fixed on the bracket (1) at the position determined by active coupling. The relative positional accuracy between the fiber array (3) and the guide pin (4) is less than 5μm.

2. The pluggable fiber optic FA-CPO interface optical component according to claim 1, characterized in that, The bracket (1) and the guide pin (4) are both made of metal.

3. The pluggable fiber optic FA-CPO interface optical component according to claim 2, characterized in that, The guide pin (4) is fixed to the side plate (110) in the bracket (1) by laser welding.

4. The pluggable fiber optic FA-CPO interface optical component according to claim 2, characterized in that, The support (1) is made of Kovar alloy.

5. The pluggable fiber optic FA-CPO interface optical component according to claim 1, characterized in that, The support (1) includes: a substrate (120) distributed in a transverse direction and a side plate (110) on the upper surface of the substrate (120). The side plate (110) is distributed in a vertical direction. The support (1) has an L-shaped structure. The fiber array (3) is fixed on the upper surface of the substrate (120) at a position determined by active coupling.

6. The pluggable fiber optic FA-CPO interface optical component according to claim 1, characterized in that, The collimating lens array (2) is bonded to the optical end of the fiber array (3).

7. A pluggable fiber optic FA-CPO interface optical component according to claim 1, characterized in that, The fiber array (3) is glued to a predetermined position on the upper surface of the substrate (120) in the bracket (1).

8. A pluggable fiber optic FA-CPO interface optical component according to claim 7, characterized in that, The adhesive is a UV adhesive.

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