High-precision optical fiber coupling device

Abstract

A high-precision optical fiber coupling device comprises a coupling base, a micro-adjusting mechanism, an optical fiber clamping device, a lens optical fiber, a low-temperature glass solder and a heating control device. The coupling base is provided with mounting positions of a laser chip and an optical fiber holder; the fine adjustment mechanism comprises X-axis fine adjustment tables, Y-axis fine adjustment tables and Z-axis fine adjustment tables, and each fine adjustment table is provided with a precise screw, a stepping motor and a sliding platform; the optical fiber holder is fixed on the fine adjustment mechanism; the lens optical fiber is fixed through the optical fiber holder, and the other end is coupled with the laser chip through the low-temperature glass solder; the heating control device comprises an embedded heater and a high-precision thermocouple temperature sensor; the heater adopts a micro thin-film resistor structure and is mounted below the optical fiber coupling area; the temperature sensor is mounted on the side of the heater; the utility model has the beneficial effects of ensuring efficient coupling of the optical fiber and the laser chip, and being suitable for the field of precise optical communication.

Description

Technical Field

[0001] The utility model relates to the field of optical fiber communication, in particular to a high-precision optical fiber coupling device. Background Art

[0002] In the field of fiber-optic communications, precise coupling between optical fiber and laser chip is crucial to transmission efficiency and performance. However, there are some shortcomings in the existing technology, which affect the performance and reliability of fiber-optic coupling devices:

[0003] Insufficient precision: Traditional fiber coupling devices have limitations in fine-tuning accuracy. Due to the size difference between the fiber and the laser chip and the influence of environmental factors, it is difficult to achieve high-precision coupling.

[0004] Multi-channel coupling problem: In some application scenarios, multiple optical fibers and laser chips need to be coupled simultaneously. However, the multi-channel coupling solutions in the prior art have problems of complexity and instability.

[0005] Inadequate temperature control: The coupling temperature between the optical fiber and the laser chip is critical to performance. The heating control devices in the prior art often cannot accurately control the temperature of the coupling area, resulting in unstable performance.

[0006] To sum up, the technical background section of this patent is intended to explain the current status of the prior art field. The content of this section will provide necessary background information for understanding the technical contribution and innovation of this patent. The signals disclosed in this background technology section are only intended to increase the understanding of the overall background of the utility model and should not be regarded as implying any form of subjective consciousness. Utility Model Content

[0007] In view of the above, the purpose of the utility model is to provide a high-precision optical fiber coupling device to solve the technical problems of external drainage and subsequent maintenance.

[0008] The technical solution adopted to achieve the purpose of the utility model is a high-precision optical fiber coupling device, comprising: a coupling base, a fine-adjustment mechanism, an optical fiber holder, a lens optical fiber coupled with a laser chip, a low-temperature glass solder, and a heating control device. The coupling base is a high-precision processed metal base, and the base is provided with a mounting position for placing the laser chip and the optical fiber holder; the fine-adjustment mechanism comprises an X-axis fine-adjustment platform, a Y-axis fine-adjustment platform, and a Z-axis fine-adjustment platform. The X-axis fine-adjustment platform comprises a first precision screw, a first stepper motor and a first sliding platform. One end of the first precision screw is connected to the first stepper motor, and the other end is fixed on the coupling base. The first sliding platform is driven to move in the X direction by rotating the first precision screw. The Y-axis fine-adjustment platform comprises a second precision screw, a second stepper motor and a second sliding platform. One end of the second precision screw is connected to the second stepper motor, and the other end is fixed on the first sliding platform. The second sliding platform is driven to move in the Y direction by rotating the second precision screw. The Z-axis fine-adjustment platform comprises a third precision screw, a second stepper motor and a second sliding platform. The third precision screw is connected to the third stepper motor at one end, and the other end is fixed on the second sliding platform. The third sliding platform is driven to move along the Z direction by rotating the third precision screw. The optical fiber clamp is installed on the micro-adjustment mechanism to fix and adjust the position of the lens optical fiber. One end of the lens optical fiber is fixed by the optical fiber clamp, and the other end is coupled to the laser chip by low-temperature glass solder. The heating control device includes an embedded heater and a temperature sensor. The embedded heater adopts a micro-thin film resistor structure. The thin film resistor is made of high thermal conductivity material and can evenly distribute heat in a small area. The thin film resistor is installed below the optical fiber coupling area and realizes fast response and precise temperature control by current heating. The temperature sensor adopts a high-precision thermocouple. The thermocouple is composed of an electric couple pair composed of two different conductive materials and can generate corresponding electromotive force when the temperature changes. The thermocouple is closely installed on the side of the embedded heater to monitor the temperature of the welding area in real time.

[0009] Furthermore, the coupling base is provided with a plurality of mounting positions, each of which is provided with an independent fine-adjustment mechanism and a fiber clamp to achieve simultaneous coupling of multiple optical fibers and multiple laser chips.

[0010] Furthermore, the stepper motor and precision screw of the micro-adjustment mechanism are both made of highly wear-resistant materials, and can maintain long-term stable operation in high-frequency adjustment.

[0011] Furthermore, the surface of the micro-thin film resistor of the embedded heater is coated with a layer of high heat-resistant insulating coating to prevent current leakage and improve the safety and durability of the heater.

[0012] Furthermore, the thermocouple of the temperature sensor is made of platinum and rhodium alloy and has high sensitivity and high precision.

[0013] Furthermore, the inner surface of the optical fiber holder is coated with an anti-slip coating to increase the fixation stability of the optical fiber and prevent the optical fiber from sliding during the adjustment process.

[0014] Furthermore, the first, second and third precision screws all adopt ball screws to reduce friction and improve adjustment accuracy and repeatability.

[0015] Beneficial effects of the utility model:

[0016] 1. High-precision coupling: The device can achieve high-precision coupling between optical fiber and laser chip, improving the transmission efficiency and performance of optical communication system.

[0017] 2. Multi-channel coupling: Through multiple installation positions and independent fine-tuning mechanisms, users can simultaneously couple multiple optical fibers and laser chips to meet the needs of different application scenarios.

[0018] 3. Temperature control: The heating control device ensures that the coupling temperature is always kept within the optimal range, thus improving the stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] In the figure, 1-optical fiber, 2-laser chip, 3-optical fiber holder, 4-X-axis fine-tuning stage, 5-Y-axis fine-tuning stage, 6-coupling base. DETAILED DESCRIPTION

[0022] The present invention will be described in this embodiment according to the accompanying drawings and some implementation methods.

[0023] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] Figure 1 A basic structure of a high-precision optical fiber coupling device includes a coupling base, a fine adjustment mechanism, an optical fiber holder, a lens optical fiber, a low-temperature glass solder, and a heating control device.

[0025] In this embodiment, the coupling base is made of high-precision processed metal material to ensure the stability and accuracy of the overall structure. The coupling base has preset mounting positions for accurately positioning the laser chip and the optical fiber holder.

[0026] In this embodiment, the fine adjustment mechanism is designed as a three-axis (X, Y, Z) independent fine adjustment platform, each axis is equipped with a precision screw, a stepper motor and a sliding platform. The precision screw is driven by the stepper motor to rotate, and the sliding platform is accurately moved along the respective coordinate axes. This design allows the lens fiber to freely adjust its position in three-dimensional space until it reaches the optimal coupling state with the laser chip.

[0027] In this embodiment, the lens fiber is fixed by a fiber holder and tightly connected to the laser chip using low-temperature glass solder. This process needs to be completed under the action of a heating control device, which includes an embedded heater with a micro-thin film resistor structure and a high-precision thermocouple temperature sensor. The heater can respond quickly and accurately control the temperature of the welding area, while the thermocouple monitors in real time to ensure the welding quality.

[0028] In this embodiment, the coupling base is designed to accommodate multiple installation positions, each of which is equipped with an independent fine-adjustment mechanism and fiber holder. This configuration allows the device to handle the coupling of multiple optical fibers with multiple laser chips at the same time, greatly improving the processing capacity and efficiency of the device, and is suitable for mass production and integration of complex systems.

[0029] In this embodiment, for the stepper motor and precision screw in the fine adjustment mechanism, this embodiment uses highly wear-resistant materials to ensure long-term stability and accuracy under frequent adjustment operations, thereby extending the service life of the equipment.

[0030] In this embodiment, in order to improve the safety and durability of the heater, the surface of the micro-thin film resistor of the embedded heater in the embodiment is covered with a high heat-resistant insulating coating, which effectively prevents current leakage and ensures the efficiency and safety of the heating process.

[0031] In this embodiment, the temperature sensor is a thermocouple made of platinum-rhodium alloy. This material combination has excellent sensitivity and measurement accuracy, can accurately reflect the slight temperature changes in the welding area, and further ensures the high quality of the coupling process.

[0032] In this embodiment, in order to increase the stability of the optical fiber during the adjustment process, a layer of anti-slip coating is applied to the inner surface of the optical fiber holder, which effectively reduces the possibility of optical fiber sliding and improves the stability and reliability of coupling.

[0033] In this embodiment, a ball screw is used to replace the traditional thread structure in the design of the precision screw, which significantly reduces mechanical friction, improves the smoothness, accuracy and repeatability of adjustment, and provides technical support for achieving a higher level of fiber coupling accuracy.

[0034] Working principle:

[0035] The high-precision fiber coupling device of this patent is designed to achieve precise coupling between optical fiber and laser chip. The following is its working principle:

[0036] Fiber clamping and positioning: First, the user fixes one end of the lens fiber through the fiber clamp. The design of the fiber clamp should be able to adapt to fibers of different diameters and materials to meet the needs of different application scenarios.

[0037] Fine-tuning mechanism adjustment: The fine-tuning mechanism includes X-axis, Y-axis and Z-axis fine-tuning stages. These fine-tuning stages are implemented through precision screws and stepper motors, and can fine-tune the position of the optical fiber in the X, Y and Z directions. Users can adjust the position of the optical fiber as needed to ensure the best coupling effect.

[0038] Heating control: The embedded heater uses a micro-thin film resistor structure and is installed below the fiber coupling area. It achieves fast response and precise temperature control through current heating. The heating control device should have precise temperature control function to ensure that the coupling temperature between the fiber and the laser chip is always kept within the optimal range.

[0039] Temperature monitoring: The temperature sensor uses a high-precision thermocouple to monitor the temperature of the welding area in real time. This helps to ensure temperature stability during the coupling process.

[0040] Directions:

[0041] Installation: Place the coupling base in a suitable position to ensure its stability. Place the laser chip on the corresponding mounting position of the base.

[0042] Fiber clamping: Fix one end of the lens fiber with the fiber clamp. Make sure the fiber clamp can firmly clamp the fiber.

[0043] Fine-tuning: Use the fine-tuning mechanism (X, Y, Z axis fine-tuning stage) to adjust the position of the optical fiber. Fine-tune the position of the optical fiber as needed to achieve the best coupling effect.

[0044] Heating control: Activate the heating control to ensure that the embedded heater operates within the appropriate temperature range. Adjust the heating power as needed to maintain a constant coupling temperature.

[0045] Monitoring: Real-time monitoring of temperature sensor readings to ensure stable temperature in the coupling area.

[0046] Verification: Use appropriate test equipment to verify the coupling effect between the optical fiber and the laser chip. If multiple optical fibers and laser chips need to be coupled simultaneously, multiple mounting positions and corresponding fine-tuning mechanisms can be used.

[0047] This patented high-precision fiber coupling device achieves high-precision and high-efficiency coupling between optical fiber and laser chip through sophisticated mechanical design and advanced temperature control system, providing strong technical support for applications in optical communications, optoelectronics and other fields.

[0048] The above is an example of a specific implementation of this patent, which is for reference only and is not limited thereto. Without departing from the spirit and scope of this patent, technicians in this field can make various changes and modifications to this patent, and these changes and modifications should be included in the scope of protection of this patent.

[0049] The specific implementation of this patent is only for illustrative purposes and does not limit the scope of protection of this patent. Various changes and modifications can be made to the specific implementation of this patent without departing from the gist and spirit of this patent. These changes and modifications are within the scope covered by this patent.

[0050] It is worth noting that: in the description of the present utility model, the meaning of "multiple" is two or more than two, unless otherwise clearly and specifically defined. In the present utility model, unless otherwise clearly specified and defined, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; the circuits described in the present utility model are all commonly used circuits in the field, and other related components are all existing commonly used components. For ordinary technicians in the field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0051] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A high-precision optical fiber coupling device, comprising: A coupling base, a fine adjustment mechanism, an optical fiber holder, a lens optical fiber coupled with a laser chip, a low-temperature glass solder, and a heating control device, characterized in that: The coupling base is a high-precision processed metal base, and the base is provided with mounting positions for placing the laser chip and the optical fiber holder; The fine adjustment mechanism comprises an X-axis fine adjustment platform, a Y-axis fine adjustment platform, and a Z-axis fine adjustment platform. The X-axis fine adjustment platform comprises a first precision screw, a first stepper motor, and a first sliding platform. One end of the first precision screw is connected to the first stepper motor, and the other end is fixed on the coupling base. The first sliding platform is driven to move in the X direction by rotating the first precision screw. The Y-axis fine adjustment platform comprises a second precision screw, a second stepper motor, and a second sliding platform. One end of the second precision screw is connected to the second stepper motor, and the other end is fixed on the first sliding platform. The second sliding platform is driven to move in the Y direction by rotating the second precision screw. The Z-axis fine adjustment platform comprises a third precision screw, a third stepper motor, and a third sliding platform. One end of the third precision screw is connected to the third stepper motor, and the other end is fixed on the second sliding platform. The third sliding platform is driven to move in the Z direction by rotating the third precision screw. The optical fiber holder is mounted on the micro-adjustment mechanism and is used to fix and adjust the position of the lens optical fiber; One end of the lens optical fiber is fixed by an optical fiber holder, and the other end is coupled to the laser chip by low-temperature glass solder; The heating control device includes an embedded heater and a temperature sensor, The embedded heater adopts a micro thin film resistor structure. The thin film resistor is made of high thermal conductivity material and is installed under the optical fiber coupling area. The temperature sensor adopts a high-precision thermocouple, which is composed of a thermocouple pair composed of two different conductive materials. The thermocouple is closely installed on the side of the embedded heater.

2. A high-precision optical fiber coupling device according to claim 1, characterized in that: The coupling base is provided with a plurality of installation positions, and each installation position is provided with an independent fine adjustment mechanism and an optical fiber clamp.

3. A high-precision optical fiber coupling device according to claim 1, characterized in that: The stepper motor and the precision screw of the micro-adjustment mechanism are both made of highly wear-resistant materials.

4. A high-precision optical fiber coupling device according to claim 1, characterized in that: The surface of the micro-thin film resistor of the embedded heater is coated with a high heat-resistant insulating coating.

5. The high-precision optical fiber coupling device according to claim 1, characterized in that: The thermocouple of the temperature sensor is made of platinum and rhodium alloy.

6. A high-precision optical fiber coupling device according to claim 1, characterized in that: The inner surface of the optical fiber holder is coated with an anti-slip coating.

7. A high-precision optical fiber coupling device according to claim 1, characterized in that: The first, second and third precision screws are all ball screws.

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