A single-layer double-row optical fiber array

Abstract

The present invention discloses a single-layer double-row optical fiber array, including a mounting plate cover plate and a plurality of first optical fibers and second optical fibers spaced apart from each other, the upper surface of the mounting plate is provided with a plurality of mounting grooves parallel to each other, the first optical fiber and the second optical fiber are arranged in the mounting grooves after removing the coating layer, and the first optical fiber and the second optical fiber are staggered front and back, and the cover plate is buckled on the upper surface of the mounting plate to fix the first optical fiber and the second optical fiber in the mounting groove. The front and back staggered arrangement of the first optical fiber and the second optical fiber reduces the area where the first optical fiber and the second optical fiber can affect each other, effectively reducing the crosstalk between the transmitted and received signals, and at the same time, the front and back staggered arrangement of the first optical fiber and the second optical fiber directly increases the distance between the VCSEL chip and the PD chip, which is convenient for heat dissipation.

Description

Technical Field

[0001] The invention relates to the field of communications, and in particular to a single-layer double-row optical fiber array. Background Art

[0002] With the development of high-speed optical modules and data center parallel optical communication technology, it is a common technical solution to use optical fiber arrays to couple with VCSEL chips (vertical cavity emitting lasers) or PD (photo detector) chip arrays. The existing more common optical fiber array technical solutions mostly adopt a single-layer single-row structure, that is, the functions of receiving and transmitting are realized simultaneously in the same row of optical fibers. This solution is suitable for parallel communications with a small number of channels. VCSEL chips and PD chips need to be closely concentrated together, and the heating problem is more serious. At the same time, in this technical solution, because the light beam will have a certain divergence on the surface of the optical fiber, it is easy to cause greater crosstalk. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a single-layer double-row optical fiber array which can better solve signal crosstalk, chip heat dissipation and high reliability.

[0004] The technical solution adopted by the present invention is:

[0005] A single-layer double-row optical fiber array comprises a mounting plate, a cover plate, and a plurality of first optical fibers and second optical fibers spaced apart from each other. The upper surface of the mounting plate is provided with a plurality of mounting grooves parallel to each other. The first optical fibers and the second optical fibers are arranged in the mounting grooves after removing the coating layers, and the first optical fibers and the second optical fibers are staggered front to back. The cover plate is buckled on the upper surface of the mounting plate to fix the first optical fibers and the second optical fibers in the mounting grooves.

[0006] The mounting groove is a V-shaped groove, a U-shaped groove or a rectangular groove.

[0007] The cutting angle A of the front end faces of the first optical fiber and the second optical fiber is greater than 40° and less than 50°.

[0008] The cover plate is a glass cover plate, and the mounting plate is a glass mounting plate.

[0009] At least one groove is arranged on the upper surface of the installation plate to prevent the first optical fiber and the second optical fiber from being broken by pressure.

[0010] The present invention also includes an optical fiber connector, and the optical fiber connector is fixedly connected to the rear ends of the first optical fiber and the second optical fiber by glue.

[0011] Beneficial effects of the present invention:

[0012] The present invention arranges the first optical fiber and the second optical fiber in a front-to-back staggered manner in the installation groove, which effectively reduces the crosstalk between the transmitted and received signals. At the same time, the front-to-back staggered arrangement of the first optical fiber and the second optical fiber will directly increase the distance between the VCSEL chip and the PD chip, which is convenient for heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings.

[0014] Figure 1 It is a three-dimensional appearance diagram of the present invention.

[0015] Figure 2 It is a top view of the present invention.

[0016] Figure 3 It is a schematic diagram of the cutting angle A of the present invention.

[0017] Figure 4 It is the front view of the present invention. DETAILED DESCRIPTION

[0018] like Figure 1-Figure 4 As shown, a single-layer double-row optical fiber array includes a mounting plate 1, a cover plate 2, and a plurality of first optical fibers 3 and second optical fibers 7 arranged at intervals from each other. The upper surface of the mounting plate 1 is provided with a plurality of mounting grooves 4 parallel to each other. The first optical fibers 3 and the second optical fibers 7 are arranged in the mounting grooves 4 after removing the coating layer, and the first optical fibers 3 and the second optical fibers 7 are staggered front and back. The cover plate 2 is buckled on the upper surface of the mounting plate 1 to fix the first optical fibers 3 and the second optical fibers 7 in the mounting grooves 4. The staggered arrangement of the first optical fibers 3 and the second optical fibers 7 front and back reduces the area where the first optical fibers 3 and the second optical fibers 7 can affect each other, effectively reducing the crosstalk between the transmitted and received signals. At the same time, the staggered arrangement of the first optical fibers 3 and the second optical fibers 7 front and back directly increases the distance between the VCSEL chip and the PD chip, which is convenient for heat dissipation. The present invention is suitable for low-channel transmission and can also be used for high-channel transmission, such as twelve-way transmission and twelve-way reception. The number of mounting grooves 4 is usually four, eight, twelve, twenty-four, etc. In the present invention, the first optical fiber 3 can be a receiving optical fiber or a transmitting optical fiber; the second optical fiber 7 can be a transmitting optical fiber or a receiving optical fiber.

[0019] The mounting groove 4 is a V-shaped groove, a U-shaped groove or a rectangular groove, so as to facilitate the placement and fixation of the first optical fiber 3 and the second optical fiber 7, so that the first optical fiber 3 and the second optical fiber 7 are not easily moved.

[0020] The cutting angle A of the front end faces of the first optical fiber 3 and the second optical fiber 7 is greater than 40° and less than 50°. The cutting angle A facilitates the reflection of light and can reduce the loss of light energy.

[0021] The cover plate 2 is a glass cover plate, and the mounting plate 1 is a glass mounting plate 1 .

[0022] At least one groove 5 is provided on the upper surface of the mounting plate 1 to prevent the first optical fiber 3 and the second optical fiber 7 from being broken by pressure.

[0023] The present invention also includes an optical fiber connector 6, which is fixedly connected to the rear ends of the first optical fiber 3 and the second optical fiber 7 by glue. In the present invention, the optical fiber connector 6 is a commonly used MT multi-core plug. In the prior art, a small section of optical fiber is exposed between the optical fiber array and the MT multi-core plug, which is equivalent to a soft connection. The soft connection method with exposed optical fiber has a large overall size, which is not conducive to the miniaturization packaging of the optical module. At the same time, in the actual manufacturing process, the length of the optical fiber is difficult to accurately control, but inside the optical module, its position size is already fixed. If the optical fiber is too short, the FA-MT component cannot be installed in the module. On the contrary, if the optical fiber is too long, but the optical fiber is always in an over-bent stress state, it cannot even be installed. This solution uses a hard-connected integrated structural solution, that is, the optical fiber array and the optical fiber connector 6 are bonded together, which is relatively compact and small as a whole, and is usually only half the length of the prior art. Since the length is easy to accurately control, it is more suitable for batch production, and there is no state of bending and stress on the optical fiber, so that the long-term reliability of the product is higher.

[0024] The assembly process of the present invention is as follows:

[0025] The coating layer at the front end of the cut first optical fiber 3 and the second optical fiber 7 is stripped off, and then the front end faces of the first optical fiber 3 and the second optical fiber 7 are ground and polished to a 45° angle;

[0026] Place the first optical fiber 3 into the installation groove 4, with the front end face of the first optical fiber 3 at a 45° angle exposed toward the front end of the installation plate 1, cover the front end of the installation plate 1 with the cover plate 2, and press it tightly so that the first optical fiber 3 is tightly pressed into the installation groove 4;

[0027] Place the second optical fiber 7 into the installation groove 4, with the front end face of the second optical fiber 7 at a 45° angle exposed and located above the groove 5, and the second optical fiber 7 is misaligned with the first optical fiber 3. Cover the rear end of the installation plate 1 with the cover plate 2 and press it tightly so that the second optical fiber 7 is tightly pressed into the installation groove 4;

[0028] Inject UV curing glue between the installation groove 4 and the cover plate 2, then cure the glue under UV light, and then heat and bake at high temperature to completely cure the glue;

[0029] The coating layers at the rear ends of the first optical fiber 3 array and the second optical fiber 7 array are respectively stripped and cleaned;

[0030] Insert the rear ends of the first optical fiber array 3 and the second optical fiber array 7, which have been stripped of their coating layers, alternately into the holes of the corresponding optical fiber connectors 6;

[0031] Adjust the relative positions of the front and rear layers of the optical fiber array so that the rear end surface of the mounting groove 4 is in close contact with the optical fiber connector 6;

[0032] Fill the glue injection window of the optical fiber connector 6 with thermosetting glue, allow the glue to flow naturally, fill the optical fiber holes of the optical fiber connector 6 and the gap between the optical fiber array and the optical fiber connector 6, and then heat to completely cure the glue, so that the two rows of optical fiber arrays and the optical fiber connector 6 are bonded together.

[0033] The end face of the optical fiber connector 6 is ground and polished to a desired angle, such as 0 degrees, 8 degrees, etc.

[0034] The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment. As long as the technical solutions for achieving the purpose of the present invention by basically the same means are achieved, they all fall within the protection scope of the present invention.

Claims

1. A single-layer double-row optical fiber array, characterized in that The invention comprises a mounting plate (1), a cover plate (2), and a plurality of first optical fibers (3) and second optical fibers (7) arranged at intervals from each other. The upper surface of the mounting plate (1) is provided with a plurality of mounting grooves (4) parallel to each other. The first optical fiber (3) and the second optical fiber (7) are arranged in the mounting grooves (4) after removing the coating layer. The first optical fiber (3) and the second optical fiber (7) are located at the same height, and the first optical fiber (3) and the second optical fiber (7) are staggered front to back. The cover plate (2) is buckled on the upper surface of the mounting plate (1) to fix the first optical fiber (3) and the second optical fiber (7) in the mounting grooves. The optical fiber (3) and the second optical fiber (7) are installed in a groove (4); the installation groove (4) is a V-shaped groove, a U-shaped groove or a rectangular groove; the cutting angle A of the front end face of the first optical fiber (3) and the second optical fiber (7) is greater than 40° and less than 50°; the cover plate (2) is a glass cover plate, and the installation plate (1) is a glass installation plate (1); at least one groove (5) is provided on the upper surface of the installation plate (1) to prevent the first optical fiber (3) and the second optical fiber (7) from being broken under pressure; and the optical fiber connector (6) is also included, and the optical fiber connector (6) is fixedly connected to the rear ends of the first optical fiber (3) and the second optical fiber (7) by glue.

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