A three-temperature testing fixture for OSFP high-speed optical modules

Abstract

This utility model discloses a three-temperature testing fixture for OSFP high-speed optical modules, including a base and an OSFP test board mounted on the base. The OSFP test board is used to mount the OSFP high-speed optical module to be tested. It also includes: a test space component, which consists of a support block, a sealing plate, and a top plate; a temperature control component, which includes a cover plate and an external flange; a temperature measurement component, which includes a conduit, a slider, a capillary tube, and a temperature sensing wire; and an operation component, which includes a pull rod, a top movable block, and a spring. This utility model relates to the field of optical communication technology, specifically addressing the problems of poor temperature measurement accuracy, low temperature control efficiency, poor sealing, poor operation convenience, and insufficient structural stability and safety.

Description

Technical Field

[0001] This utility model relates to the field of optical communication technology, specifically to a three-temperature testing fixture for OSFP high-speed optical modules. Background Technology

[0002] AI data centers are driving market demand for high-speed, stable, and reliable optical modules. Optical components are the core of optical modules; to ensure their stable and reliable performance, rigorous testing of all aspects of the optical module's performance is necessary before assembly. OSFP (Octal Small Form Factor Pluggable) optical modules, with their superior performance and innovative design, have become the preferred interconnect solution for hyperscale AI data centers. OSFP stands for eight-channel, compact package, achieving efficient hot-swapping within a limited space, facilitating optical module replacement and maintenance during operation. The 400G OSFP optical module uses 8-channel 50GPAM4 modulation technology, while the 800G OSFP optical module uses 8-channel 100GPAM4 modulation technology, achieving high-speed data transmission through multi-channel parallel transmission to meet the demands of rapid data transmission.

[0003] With the mass application of high-speed OSFP optical modules such as 400G and 800G, the requirements for their performance stability under different ambient temperatures are becoming increasingly stringent. To ensure the transmission reliability of optical modules in extreme environments such as normal temperature, low temperature, and high temperature, their performance needs to be evaluated through three-temperature testing. Three-temperature testing requires specialized fixtures to fix the optical modules, control the temperature, and accurately measure the temperature.

[0004] The existing three-temperature testing fixture has the following technical problems:

[0005] 1. Traditional fixtures lack a stable and fixed structure for the temperature sensing wire. When high and low temperature gases are introduced, the airflow can easily blow the temperature sensing wire away, causing it to detach from the surface of the optical module. This makes it impossible to accurately obtain the actual temperature of the optical module and affects the reliability of the test results. At the same time, the installation position of the temperature sensing wire is not adjustable, making it difficult to adapt to OSFP optical modules with different structures such as those without heat sinks, resulting in low applicability of the fixture.

[0006] 2. Some fixtures lack an independent enclosed testing space, making it easy for high and low temperature gases to diffuse, resulting in slow temperature adjustment of the optical module and increased testing time. Although some fixtures have an enclosed structure, the cover plate does not fit tightly with the optical module, or the cover plate is not securely fixed. When high-pressure air is introduced, cover plate displacement and gas leakage are likely to occur, further reducing temperature control efficiency.

[0007] 3. The operation process of the fixture, such as the insertion and removal of the optical module, replacement of the temperature sensing wire, and maintenance of the high-frequency wire, is complicated. For example, when replacing the high-frequency wire of some fixtures, the entire structure needs to be disassembled, which is time-consuming and labor-intensive. Moreover, the operating parts of the fixture lack labor-saving design, which can easily lead to fatigue of the testers during long-term operation. At the same time, the material of the operating parts has poor wear resistance and is prone to jamming during use, which affects the testing efficiency.

[0008] 4. The optical modules lack reliable fixation during testing and insertion / removal, which can easily lead to loosening and poor contact, affecting communication data transmission; some fixture materials do not have anti-static properties and are prone to generating static electricity in dry environments, damaging the precision components inside the optical modules; in addition, the fixtures lack a visual observation structure, making it impossible to monitor the status of components in the test space in real time, and making it difficult to detect problems such as detached temperature sensing wires and misaligned optical modules in a timely manner. Utility Model Content

[0009] The technical problems to be solved by this utility model are poor temperature measurement accuracy, low temperature control efficiency and poor sealing, poor operation convenience and insufficient structural stability and safety.

[0010] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0011] This utility model proposes a three-temperature test fixture for OSFP high-speed optical modules, including a base and an OSFP test board mounted on the base. The OSFP test board is used to mount the OSFP high-speed optical module to be tested. It also includes:

[0012] The test space component consists of a support block, a sealing plate, and a top plate. The support block is fixed to the base and has a U-shaped cross-section. The sealing plate is installed at the side opening of the support block. The top plate is installed on the top of the support block and encloses the sealing plate to form a closed test space.

[0013] The temperature control assembly includes a cover plate and an external flange fixed to one side of the cover plate. The cover plate is fixed to the inside of the support block and covers the OSFP test plate. The cover plate has a reserved cavity inside. An external air source introduces room temperature, low temperature or high temperature gas into the reserved cavity of the cover plate through the external flange.

[0014] The temperature measuring component includes a conduit, a slider, a capillary tube, and a temperature sensing wire. The slider is slidably located on the top of the cover plate. The conduit passes through the slider. The capillary tube is fixed to the middle of the conduit tube by high-temperature resistant adhesive. The temperature sensing wire passes through the capillary tube and is in contact with the surface of the OSFP high-speed optical module to be tested.

[0015] The operating component includes a pull rod, a top movable block, and a spring. The top movable block is slidably connected to the top plate. One end of the pull rod passes through the top movable block and the bottom is fixed to the slider. The spring is sleeved on the outside of the pull rod to provide an elastic force that moves the movable component toward the OSFP high-speed optical module under test.

[0016] Preferably, the operating component further includes a limiting member, the top movable block has a T-shaped slide rail inside, the limiting member is installed on the top of the slide rail and is used to limit the upward movement of the pull rod, the middle section of the pull rod has a limiting ring and is used to limit the downward movement of the pull rod, the elastic member is a spring, and the two ends of the spring abut against the limiting member and the limiting ring respectively.

[0017] Preferably, the pull rod and the top movable block are made of POM, and the base and the cover plate are made of antistatic bakelite, which has good insulation and heat resistance.

[0018] Preferably, the slider has a fixing groove, and the fixing groove has a set screw for connecting the slider and the pull rod.

[0019] Preferably, the sealing plate is a transparent acrylic sheet.

[0020] Preferably, the capillary is a stainless steel capillary, which is bonded and fixed to the guide tube with high-temperature resistant adhesive. The end of the capillary near the OSFP high-speed optical module to be tested is flattened, and the end of the temperature sensing wire passes through the flattened end of the capillary and contacts the surface of the OSFP high-speed optical module to be tested.

[0021] The present invention proposes a three-temperature testing fixture for OSFP high-speed optical modules. The beneficial effects achieved by adopting the above structure are as follows:

[0022] 1. The temperature sensing structure, which uses both springs and capillary tubes to fix the temperature sensing unit, prevents airflow from blowing it up, thus improving temperature measurement accuracy. Additionally, a spring structure is added between the pull rod and the top movable block to provide downward force, preventing the intake air pressure from blowing up the temperature sensing wire during testing, which could lead to inaccurate temperature measurements, and also preventing scratches on the module surface.

[0023] 2. By setting up enclosed spaces and reserved cavities, the sealing performance is increased, achieving efficient temperature control.

[0024] 3. The transparent cover makes operation easy and visible. The overall structure is fixed with screws, and key functional parts are easy to disassemble. It is also convenient to replace the temperature sensing wire, air tube and other structures.

[0025] 4. POM material can ensure a certain strength and wear resistance, making it easy to pull the rod without obstruction. The anti-static bakelite material is heat resistant and anti-static, and has low processing cost. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a schematic diagram of the overall structure of a three-temperature testing fixture for an OSFP high-speed optical module proposed in this application;

[0028] Figure 2 This is a schematic diagram of the structure of a three-temperature testing fixture for an OSFP high-speed optical module proposed in this application;

[0029] Figure 3 This is a schematic diagram of the internal structure of a three-temperature testing fixture for an OSFP high-speed optical module proposed in this application;

[0030] Figure 4 This is an exploded view of the three-temperature test fixture for an OSFP high-speed optical module proposed in this application;

[0031] Figure 5 This is a structural diagram showing the absence of test space components.

[0032] Figure 6 for Figure 5 Internal sectional view;

[0033] Figure 7 This is a schematic diagram illustrating the actual use of this application.

[0034] The components are: 1. base, 2. OSFP test plate, 3. support block, 4. sealing plate, 5. conduit, 6. slider, 7. pull rod, 8. cover plate, 9. external flange, 10. top movable block, 11. set screw, 12. spring, 13. limit component, 14. top plate, 15. boss. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0036] This application provides a three-temperature test fixture for OSFP high-speed optical modules, mainly used for testing the performance of 400G / 800G OSFP optical modules under three-temperature environments. The fixture uses a mechanical structure to fix the optical module, control the temperature, and measure the temperature, ensuring the accuracy and efficiency of the test.

[0037] Example 1

[0038] refer to Figures 1-4 As shown, the test fixture includes: base 1, OSFP test board 2, test space component, temperature control component, temperature measurement component and operation component.

[0039] Base 1: Made of anti-static bakelite material, it can be fixed to the test platform with screws. Base 1 has mounting holes for fixing OSFP test board 2.

[0040] OSFP Test Board 2: This is a standard OSFP interface test board, such as the OSFP-8X1 test board from supplier Samtec. It is used to install the OSFP high-speed optical module to be tested, such as a 400G or 800G module. Test Board 2 is fixed to base 1 with screws to ensure that the optical module will not loosen during the test.

[0041] Test space components: consisting of support block 3, sealing plate 4 and top plate 14. Support block 3 has a U-shaped structure and is fixed to base 1 with screws. Sealing plate 4 is a transparent acrylic plate and is installed at the side opening of support block 3 with clips to facilitate observation of the interior of the test space. Top plate 14 is fixed to the top of support block 3 with screws, and together with sealing plate 4, they form a closed test space to prevent gas leakage.

[0042] Temperature control components include a cover plate 8 and an external flange 9. The cover plate 8 is made of anti-static bakelite and has a reserved cavity inside. It is fixed to the inside of the support block 3 with screws and covers the OSFP test board 2. The external flange 9 is a stainless steel flange, fixed to one side of the cover plate 8, and connected to an external air source. It introduces room temperature, low temperature or high temperature gas into the reserved cavity. The gas is blown evenly onto the surface of the optical module through the air holes at the bottom of the cover plate 8 to achieve rapid temperature control.

[0043] Temperature sensing components include a conduit 5, a slider 6, a capillary tube, and a temperature sensing wire. The conduit 5 is a stainless steel tube that passes through the slider 6. The slider 6 is made of POM material and slides within a groove on the top of the cover plate 8. The capillary tube is made of stainless steel and is fixed to the middle of the conduit 5 with high-temperature resistant adhesive. The end of the capillary tube near the optical module is flattened. The temperature sensing wire is a K-type thermocouple that passes through the capillary tube, with its end in contact with the surface of the optical module to measure temperature. The temperature sensing wire connects to an external temperature recorder for temperature monitoring.

[0044] Operating components include a pull rod 7, a top movable block 10, and a spring 12. The top movable block 10 is made of POM material and is slidably connected to the T-shaped track of the top plate 14. The pull rod 7 is a POM rod, with one end passing through the top movable block 10 and the bottom fixed to the slider 6 by a set screw 11. Figure 5As shown, the top of the pull rod 7 has a boss 15 for easy operation. The spring 12 is a stainless steel compression spring, sleeved on the outside of the pull rod 7, with its two ends abutting against the limiting member 13 and the limiting ring on the pull rod 7, respectively. Figure 6 As shown. The limiting component 13 is a POM block, fixed to the top of the slide rail of the top movable block 10, used to limit the stroke of the pull rod 7. By pulling the pull rod 7, the slider 6 and the temperature sensing wire can be moved up and down, facilitating the insertion and removal of the optical module or the replacement of the temperature sensing wire.

[0045] The working principle is as follows:

[0046] During testing, the OSFP optical module is installed on the OSFP test board 2 and secured to the base plate 1 with screws to ensure it does not loosen during testing and insertion / removal. For ease of operation, the top movable block 10, spring 12, spring limit block 13, top plate 14, and pull rod 7 form a manual operating component. Pressing down on the pull rod 7 brings the temperature sensing wire into contact with the optical module surface. At this time, the spring 12 provides downward elastic force to ensure tight contact of the temperature sensing wire. This also prevents the intake air pressure from blowing the temperature sensing wire away during testing, which could lead to inaccurate temperature measurements, and avoids scratching the surface of the OSFP high-speed optical module.

[0047] The cover plate 8 is positioned to precisely hold the OSFP high-speed optical module, ensuring gas tightness. An external gas source introduces high and low temperature gases into the cover plate 8 through the external flange 9. The gas circulates within the closed test space, achieving rapid temperature control.

[0048] A stainless steel capillary tube is fixed to the conduit 5 using high-temperature resistant adhesive. A K-type temperature sensing wire passes through the capillary tube, and the capillary tube at the welding head end is flattened to ensure that the thickness of the temperature sensing wire can pass through the heat dissipation area on the top of the OSFP optical module and contact the module surface, ensuring the accuracy of temperature measurement. The working height is adjustable, allowing testing of different types of optical modules. The temperature sensing wire measures the optical module temperature in real time, and the data is recorded via external equipment. After testing, the optical module can be removed by pulling the lever 7.

[0049] Example 2

[0050] Based on Example 1, further optimizations were made to the details:

[0051] refer to Figure 3 and Figure 7 As shown, the air intake and outlet methods of the fixture are demonstrated. Due to the high stress of the high-frequency line, the top of the fixture is designed to avoid it. The air pipe is locked to the cover plate 8 via the external flange 9. The cover plate 8 is fixed to the fixture with screws to prevent the cover plate 8 from being blown off by excessive air pressure. The cover plate 8 has a reserved cavity to relieve air pressure and the gas is directly blown into the light module to improve heating efficiency.

[0052] The flattened end of the capillary tube adopts a U-shaped groove design, and the temperature sensing wire is fixed by a pressure block to prevent it from loosening.

[0053] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An OSFP high-speed optical module three-temperature test fixture, comprising a base (1) and an OSFP test board (2) mounted on the base (1), the OSFP test board (2) being used to mount an OSFP high-speed optical module to be tested, characterized in that, Also includes: The test space component consists of a support block (3), a sealing plate (4) and a top plate (14). The support block (3) is fixed on the base (1) and has a U-shaped cross section. The sealing plate (4) is installed at the side opening of the support block (3). The top plate (14) is installed on the top of the support block (3) and encloses the sealing plate (4) to form a closed test space. The temperature control assembly includes a cover plate (8) and an external flange (9) fixed to one side of the cover plate (8). The cover plate (8) is fixed to the inside of the support block (3) and covers the OSFP test plate (2). The cover plate (8) has a reserved cavity inside. An external gas source introduces room temperature, low temperature or high temperature gas into the reserved cavity of the cover plate (8) through the external flange (9). The temperature measuring component includes a conduit (5), a slider (6), a capillary tube, and a temperature sensing wire. The slider (6) slides on the top of the cover plate (8). The conduit (5) passes through the slider (6). The capillary tube is fixed to the middle of the conduit (5) with high-temperature resistant adhesive. The temperature sensing wire passes through the capillary tube and contacts the surface of the OSFP high-speed optical module to be tested. The operating component includes a pull rod (7), a top movable block (10), and a spring (12). The top movable block (10) is slidably connected to the top plate (14). One end of the pull rod (7) passes through the top movable block (10) and the bottom is fixed to the slider (6). The spring (12) is sleeved on the outside of the pull rod (7) to provide elastic force to move the movable part toward the OSFP high-speed optical module under test.

2. The three-temperature test fixture for OSFP high-speed optical modules according to claim 1, characterized in that: The operating component also includes a limiting member (13). The top movable block (10) has a T-shaped slide inside. The limiting member (13) is installed on the top of the slide and is used to limit the upward movement of the pull rod (7). The middle section of the pull rod (7) has a limiting ring, which is used to limit the downward movement of the pull rod (7). The two ends of the spring (12) abut against the limiting member (13) and the limiting ring, respectively.

3. The three-temperature test fixture for OSFP high-speed optical modules according to claim 1, characterized in that: The slider (6) has a fixing groove, and a set screw (11) is provided in the fixing groove for connecting the slider (6) and the pull rod (7).

4. The three-temperature test fixture for OSFP high-speed optical modules according to claim 1, characterized in that: The pull rod (7) and the top movable block (10) are made of POM, the base (1) and the cover plate (8) are made of antistatic bakelite, and the sealing plate (4) is made of transparent acrylic sheet.

5. The three-temperature test fixture for OSFP high-speed optical modules according to claim 1, characterized in that: The capillary is a stainless steel capillary. The stainless steel capillary is bonded to the guide tube (5) with high-temperature resistant adhesive. The end of the capillary near the OSFP high-speed optical module to be tested is flattened. The end of the temperature sensing wire passes through the flattened end of the capillary and contacts the surface of the OSFP high-speed optical module to be tested.

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