MT insertion core and 1.6 T SR8 optical module

Abstract

The utility model relates to an MT insertion core, which comprises an insertion core body and a plurality of optical fibers, one ends of the plurality of optical fibers are respectively inserted into a plurality of channels of the insertion core body one by one, the end surfaces of fiber cores of the optical fibers are recessed in the channels of the insertion core body, and the end surfaces of the fiber cores of the optical fibers are plated with antireflection films recessed in the channels. A 1.6 T SR8 optical module is characterized in that two lenses are fixed on a PCB side by side along the width direction of the PCB, and a horizontally distributed lens side MT insertion core is inserted and coupled on each lens; the MT insertion core is provided with sixteen optical fibers, the sixteen optical fibers of the MT insertion core are divided into two groups by taking eight optical fibers as one group and are respectively coupled with the two lens side MT insertion cores, or the MT insertion core is provided with eight optical fibers, and the eight optical fibers of each of the two MT insertion cores are respectively coupled with the two lens side MT insertion cores. The method has the beneficial effects that the optical power jitter can be optimized to be less than 0.3 dB, and the jitter of the amplitude does not cause error code increase and does not cause service interruption.

Description

Technical Field

[0001] The utility model relates to the technical field of optical modules, in particular to an MT ferrule and a 1.6T SR8 optical module. Background Art

[0002] The traditional 1.6T SR8 optical module has 8 transmitters and 8 receivers, with a single wave of 200G. Its structure includes at least: PCB board, transmitter optical chip, lens, lens-side MT ferrule and optical port side MT ferrule. Two lenses are fixed side by side along the width direction of the PCB board. A transmitter optical chip coupled with the lens is fixed under each lens on the PCB board. Each lens is plugged and coupled with a horizontally distributed lens-side MT ferrule, and the optical port side MT ferrule has 16 optical fibers. The 16 optical fibers of the optical port side MT ferrule are divided into two groups of eight and are respectively coupled with the two lens-side MT ferrules. Alternatively, the optical port side MT ferrule has eight optical fibers, and the eight optical fibers of the two optical port side MT ferrules are respectively coupled with the two lens-side MT ferrules. This type of 1.6T The MT ferrule on the optical port side of the SR8 optical module is used to connect to the MPO on the user side. The core end face of the MT ferrule on the optical port side protrudes 100nm to 2000nm from the ferrule end face, and the core end face is not coated with an anti-reflection film. Figure 1 As shown, the core end face of the MT ferrule on the lens side is coated with an anti-reflection film to reduce reflection;

[0003] When performing a Wiggle test on an MPO fiber patch cord in an optical module, or when lifting or lowering an MPO fiber patch cord inserted into an optical module during switch expansion on the user side, optical power fluctuations may occur. This is because when the MPO fiber patch cord is lifted or lowered (as in the Wiggle test), the fiber is subjected to force. A slight angle and gap form between the MT ferrule on the optical port side of the optical module and the MT ferrule on the user side of the MPO fiber patch cord, resulting in Fresnel reflection. The reflected light enters the transmitting optical chip (VCSE L chip), causing optical power fluctuations. The measured amplitude of this fluctuation is 0.6dB to 1dB, which can increase bit errors and even cause service interruption. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide an MT ferrule and a 1.6T SR8 optical module to overcome the deficiencies in the above-mentioned prior art.

[0005] The utility model provides a technical solution to the above-mentioned technical problem as follows: an MT ferrule, comprising: a ferrule body and a plurality of optical fibers, wherein the ferrule body has a plurality of channels distributed side by side, one end of each of the plurality of optical fibers is inserted into the plurality of channels of the ferrule body, the end faces of the optical fiber cores are recessed in the channels of the ferrule body, and the end faces of the optical fiber cores are coated with an antireflection coating recessed in the channels.

[0006] The beneficial effects of the utility model are:

[0007] This MT ferrule is used in 1.6T SR8 optical modules and serves as the MT ferrule on the optical port side of the 1.6T SR8 optical module for docking with the user-side MPO or performing Wiggle testing. Because the anti-reflection coating on the fiber core end face does not protrude beyond the end face of the ferrule body, it can prevent abrasion of the coating layer. Even if the fiber is lifted up or down, it can significantly reduce Fresnel reflection and improve the optical power stability of the optical module. Measured data shows that the optical power fluctuation can be optimized from the existing 0.6dB to 1dB fluctuation to less than 0.3dB. This fluctuation does not increase bit errors or cause service interruption, greatly improving the stability of the optical module and customer satisfaction.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the distance between the end face of the optical fiber core and the end face of the ferrule body is 1000 nm to 4000 nm.

[0010] The above method has the following further beneficial effects: Under normal circumstances, there is a gap of about 1000nm when two MT ferrules are docked. The reason is that the end faces of the MT ferrules are uneven and contain tiny foreign objects. If the shrinkage is too little, when the MT ferrule is docked with the MT ferrule of the MPO, it will cause interference contact between the optical fiber cores and cause the coating layer to fall off. If the shrinkage is too much, it will lead to increased insertion loss.

[0011] Based on the above technical solution, the present invention also provides a 1.6T SR8 optical module, comprising: a PCB board, a transmitting optical chip, a lens, a lens-side MT ferrule, and an MT ferrule. Two lenses are fixed side by side along the width direction of the PCB board, and a transmitting optical chip coupled to the lens is fixed under each lens on the PCB board. A horizontally distributed lens-side MT ferrule is plugged and coupled to each lens. The MT ferrule has sixteen optical fibers. The sixteen optical fibers of the MT ferrule are divided into two groups of eight and are respectively coupled to the two lens-side MT ferrules.

[0012] The above-mentioned method has the following further beneficial effects: when connecting to the MPO on the user side or performing wiggle testing, even if the optical fiber is lifted up or down, the Fresnel reflection can be greatly reduced, and the optical power stability of the optical module can be improved. The measured data shows that the optical power fluctuation can be optimized from 0.6dB to 1dB in the existing solution to less than 0.3dB. The fluctuation of this amplitude will not lead to an increase in bit errors, let alone service interruption, which greatly improves the stability of the optical module and customer satisfaction.

[0013] Furthermore, the MT ferrule is placed horizontally.

[0014] Based on the above technical solution, the present invention also provides a 1.6T SR8 optical module, including: a PCB board, a transmitting optical chip, a lens, a lens-side MT ferrule, and two MT ferrules. Two lenses are fixed side by side along the width direction of the PCB board. A transmitting optical chip coupled to the lens is fixed under each lens on the PCB board. A horizontally distributed lens-side MT ferrule is plugged and coupled to each lens. The MT ferrule has eight optical fibers, and the eight optical fibers of each of the two MT ferrules are coupled to the two lens-side MT ferrules respectively.

[0015] The above-mentioned method has the following further beneficial effects: when connecting to the MPO on the user side or performing wiggle testing, even if the optical fiber is lifted up or down, the Fresnel reflection can be greatly reduced, and the optical power stability of the optical module can be improved. The measured data shows that the optical power fluctuation can be optimized from 0.6dB to 1dB in the existing solution to less than 0.3dB. The fluctuation of this amplitude will not lead to an increase in bit errors, let alone service interruption, which greatly improves the stability of the optical module and customer satisfaction.

[0016] Furthermore, the MT ferrule is placed vertically. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the structural diagram of the MT ferrule on the traditional optical port side;

[0018] Figure 2 This is a structural diagram of the MT ferrule in the present utility model;

[0019] Figure 3 This is a diagram showing the MT ferrule of the user-side MPO fiber jumper in a lifted state relative to the MT ferrule in the present invention;

[0020] Figure 4 This is the structural diagram of the 1.6T SR8 optical module for a single MT in the utility model;

[0021] Figure 5 This is the structure diagram of the dual-MT 1.6T SR8 optical module in this utility model;

[0022] Figure 6 This is a test data chart of the traditional MT ferrule and the MT ferrule in the utility model used in optical modules.

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] 1. MT ferrule, 110, ferrule body, 111, channel, 120, optical fiber, 130, anti-reflection coating, 2. PCB board, 3. Lens, 4. MT ferrule on the lens side. DETAILED DESCRIPTION

[0025] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0026] Example 1

[0027] like Figure 2 As shown, an MT ferrule includes: a ferrule body 110 and multiple optical fibers 120. The ferrule body 110 has multiple channels 111 distributed side by side, and one end of each of the multiple optical fibers 120 is inserted into the multiple channels 111 of the ferrule body 110. The core end faces of the optical fibers 120 are recessed in the channels 111 of the ferrule body 110, that is, the core end faces of the optical fibers 120 do not protrude from the end face of the ferrule body 110. The core end faces of the optical fibers 120 are coated with an anti-reflection coating 130 recessed in the channels 111, that is, the anti-reflection coating 130 coated on the core end faces of the optical fibers 120 does not protrude from the end face of the ferrule body 110.

[0028] This MT ferrule is used in a 1.6T SR8 optical module and serves as the MT ferrule 1 on the optical port side of the 1.6T SR8 optical module to connect to the MPO on the user side or perform wiggle testing. Since the anti-reflection coating 130 on the end face of the optical fiber 120 core does not protrude outward from the end face of the ferrule body 110, it can prevent the coating from being worn. Even if the optical fiber is lifted up or down, the Fresnel reflection can be greatly reduced, thereby improving the optical power stability of the optical module. Figure 5 The figure shows the state where the MT ferrule of the user-side MPO fiber jumper is lifted relative to the MT ferrule on the optical port side of the optical module to form a slight angle and gap. The measured data shows that the optical power fluctuation can be optimized from 0.6dB to 1dB in the existing solution to less than 0.3dB. Figure 6 As shown in the figure, this amplitude fluctuation will not lead to increased bit errors or service interruptions, greatly improving the stability of the optical module and customer satisfaction.

[0029] The test data is as follows

[0030] SN Traditional MT ferrule This program 1 0.67 0.17 2 0.65 0.21 3 0.65 0.1 4 0.76 0.2 5 0.68 0.22 6 0.66 0.13 7 0.63 0.16 8 0.67 0.21

[0031] Example 2

[0032] like Figure 2 As shown, this embodiment is a further improvement on the basis of embodiment 1, specifically as follows:

[0033] The distance between the end face of the optical fiber 120 core and the end face of the ferrule body 110 is 1000nm to 4000nm, that is, the size of the indentation of the end face of the optical fiber 120 core is 1000nm to 4000nm. Under normal circumstances, there is a gap of about 1000nm when two MT ferrules are docked. The reason is that the end face of the MT ferrule is uneven and there are tiny foreign objects. If the indentation is too small, when the MT ferrule is docked with the MT ferrule of the MPO, it will cause interference contact between the optical fiber core and the coating layer to fall off. If the indentation is too large, it will lead to increased insertion loss.

[0034] Example 3

[0035] like Figure 3 As shown, a 1.6T SR8 optical module includes: a PCB board 2, a transmitting optical chip, a lens 3, a lens-side MT ferrule 4, and an MT ferrule 1 as described in Example 1 or 2. Two lenses 3 are fixed side by side along the width direction of the PCB board 2. A transmitting optical chip coupled to the lens 3 is fixed on the PCB board 2 below each lens 3. A horizontally distributed lens-side MT ferrule 4 is plugged and coupled to each lens 3. That is, this solution has two lens-side MT ferrules 4. The two lens-side MT ferrules 4 still use existing technology. That is, the lens-side MT ferrules 4 are coated with anti-reflection coating according to normal processes to reduce light reflection from the lens 3 to the lens-side MT ferrule 4. The MT ferrule 1 has sixteen optical fibers 120. The sixteen optical fibers 120 of the MT ferrule 1 are divided into two groups of eight optical fibers. The two groups of optical fibers 120 are respectively coupled to the two lens-side MT ferrules 4. That is, this solution is a single-MT 1.6T SR8 optical module.

[0036] When connecting to the user-side MPO or performing wiggle testing, even if the fiber is lifted up or down, Fresnel reflection can be significantly reduced, improving the optical power stability of the optical module. Measured data shows that the optical power fluctuation can be optimized from the existing 0.6dB to 1dB to less than 0.3dB. This fluctuation does not increase bit errors or cause service interruption, greatly improving the stability of the optical module and customer satisfaction.

[0037] As a further example: the MT ferrule 1 is placed horizontally.

[0038] Example 4

[0039] like Figure 4As shown, a 1.6T SR8 optical module includes: a PCB board 2, a transmitting optical chip, a lens 3, a lens-side MT ferrule 4, and two MT ferrules 1 as described in Example 1 or 2. Two lenses 3 are fixed side by side along the width direction of the PCB board 2. A transmitting optical chip coupled to the lens 3 is fixed on the PCB board 2 below each lens 3. A horizontally distributed lens-side MT ferrule 4 is plugged and coupled to each lens 3. That is, this solution has two lens-side MT ferrules 4. The two lens-side MT ferrules 4 still use the existing technology, that is, the lens-side MT ferrules 4 are coated with anti-reflection film according to the normal process to reduce the lens 3 reflects light to the lens-side MT ferrule 4. The MT ferrule 1 has eight optical fibers 120. The MT ferrule 1 can have eight channels 111 or twelve channels 111. If it has twelve channels 111, only the first and last four channels 111 are coupled with optical fibers 120, while the middle four channels 111 are left empty. If it has only eight channels 111, the first and last four channels 111 can be distributed at a predetermined interval. The eight optical fibers 120 of each of the two MT ferrules 1 are coupled to the two lens-side MT ferrules 4, respectively. This solution is a dual-MT 1.6T SR8 optical module.

[0040] When connecting to the user-side MPO or performing wiggle testing, even if the fiber is lifted up or down, Fresnel reflection can be significantly reduced, improving the optical power stability of the optical module. Measured data shows that the optical power fluctuation can be optimized from the existing 0.6dB to 1dB to less than 0.3dB. This fluctuation does not increase bit errors or cause service interruption, greatly improving the stability of the optical module and customer satisfaction.

[0041] As a further example: the MT ferrule 1 is placed vertically.

[0042] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A MT ferrule, comprising: A ferrule body (110) and a plurality of optical fibers (120), wherein the ferrule body (110) has a plurality of channels (111) distributed side by side, and one end of each of the plurality of optical fibers (120) is inserted into the plurality of channels (111) of the ferrule body (110), and wherein the core end faces of the optical fibers (120) are recessed in the channels (111) of the ferrule body (110), and the core end faces of the optical fibers (120) are plated with an antireflection film (130) recessed in the channels (111).

2. The MT ferrule according to claim 1, characterized in that: The distance between the core end face of the optical fiber (120) and the end face of the ferrule body (110) is 1000nm to 4000nm.

3. A 1.6T SR8 optical module, characterized in that: include: A PCB board (2), a transmitting optical chip, a lens (3), a lens-side MT ferrule (4), and an MT ferrule (1) as claimed in claim 1 or 2, wherein two lenses (3) are fixed side by side on the PCB board (2) along its width direction, a transmitting optical chip coupled to the lens (3) is fixed on the PCB board (2) below each lens (3), a horizontally distributed lens-side MT ferrule (4) is plugged and coupled to each lens (3), and the MT ferrule (1) has sixteen optical fibers (120), and the sixteen optical fibers (120) of the MT ferrule (1) are divided into two groups of eight and are respectively coupled to the two lens-side MT ferrules (4).

4. The 1.6T SR8 optical module according to claim 3, characterized in that: The MT ferrule (1) is placed horizontally.

5. A 1.6T SR8 optical module, characterized in that: include: A PCB board (2), an emitting light chip, a lens (3), a lens-side MT ferrule (4), and two MT ferrules (1) as claimed in claim 1 or 2, wherein two lenses (3) are fixed side by side on the PCB board (2) along its width direction, an emitting light chip coupled to the lens (3) is fixed on the PCB board (2) below each lens (3), a horizontally distributed lens-side MT ferrule (4) is plugged and coupled to each lens (3), the MT ferrule (1) has eight optical fibers (120), and the eight optical fibers (120) of each of the two MT ferrules (1) are coupled to the two lens-side MT ferrules (4) respectively.

6. The 1.6T SR8 optical module according to claim 5, characterized in that: The MT ferrule (1) is placed vertically.

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