Biconvex lens laser and process
By using the connecting part between the biconvex lens and the side wall of the tube and the molten glass column forming process in the laser, the problems of insufficient stability and high production cost in the packaging process of the spherical lens laser are solved, and higher packaging consistency and reliability are achieved.
Patent Information
- Application Number
- CN202510340112.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2025-05-09
AI Technical Summary
The existing spherical lens lasers have problems such as insufficient stability, high production costs and poor packaging consistency during the packaging process.
A double convex lens laser design is adopted, in which the connection between the double convex lens and the side wall of the tube and tube enhances structural stability and reduces complex welding steps through the process of cooling molding of molten glass columns.
Improves the stability of the lens in the packaging process and long-term use, reduces production costs and complex process steps, and ensures the consistency and reliability of the packaging.
Smart Images
Figure CN119965662A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of optical communication technology, and in particular to a double convex lens laser and a process. Background Art
[0002] The lenses in the current edge-emitting lasers, such as FP lasers and DFB lasers, are widely designed as spherical designs in their packaging design. Taking the spherical cap structure process as an example, first, a spherical glass lens needs to be made, and then it is embedded in the central through hole of the metal tube shell, and it cannot pass through the through hole. Then, the mixed glass solder is configured in proportion and evenly coated on the contact between the ball lens and the central through hole of the metal tube shell to form a circle of solder glass glue, which is then placed in a welding furnace for sintering at high temperature. After natural cooling, the spherical glass lens and the metal tube shell are welded into an integrated TO cap.
[0003] However, this spherical design has many defects. In terms of mechanical dimensions, the diameter of the sphere must match the diameter of the central hole of the metal tube shell. During assembly, the spherical lens cannot pass through the central hole of the tube shell, nor can it be too small, otherwise it will cause the center height deviation of the spherical lens to be too large after assembly, greatly increasing production costs and time costs. In terms of packaging consistency, due to the complex structural design, packaging consistency problems are very likely to occur during the production process, such as inconsistent focal length, which in turn affects the overall performance. Summary of the invention
[0004] In order to solve at least one of the above technical problems, the present invention provides a double convex lens laser and a process.
[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions: The double convex lens laser provided by the present invention comprises: A tube shell, the tube shell comprising a side wall, and a through hole is opened on the side wall; A base, the base is connected to the tube shell, and an accommodating space is provided between the base and the tube shell; A biconvex lens, the biconvex lens comprising a first convex surface and a second convex surface, the first convex surface and the second convex surface are respectively located on both sides of the through hole, and the biconvex lens has a connecting portion with the side wall; A light source is disposed in the accommodating space and faces the double convex lens.
[0006] In a possible implementation of the present application, the through hole is provided in the middle portion of the side wall.
[0007] In a possible implementation of the present application, the first convex surface is arranged outside the accommodating space, and the second convex surface is arranged inside the accommodating space.
[0008] In a possible implementation of the present application, the connecting portion is located between the first convex surface and the side wall.
[0009] In a possible implementation of the present application, both sides of the through hole have the connecting portion.
[0010] In a possible implementation of the present application, a heat sink is further included, and the heat sink is disposed in the accommodating space, and the heat sink is located between the base and the light source.
[0011] In a possible implementation of the present application, a backlight detector is further included, and the backlight detector is disposed in the accommodating space.
[0012] In a possible implementation of the present application, the light source is an edge-emitting laser diode.
[0013] The present application also provides a biconvex lens laser preparation process, wherein the glass for making the biconvex lens is cut into glass columns; Assemble the glass column into the through hole on the tube shell; The molten glass column is cooled on the tube cap to form a double convex lens laser as described in any one of the above.
[0014] Compared with the prior art, the connection between the biconvex lens and the side wall of the tube shell of the biconvex lens laser of the present invention enhances the overall stability of the structure. This not only improves the stability of the lens during the packaging process, but also reduces the risk of lens displacement or damage caused by factors such as vibration or temperature changes. The highly reliable structure ensures the stability and performance consistency of the lens in long-term use. Compared with traditional spherical lenses, the complex process steps required in the manufacturing process are reduced. This not only makes the production process more concise and efficient, but also significantly improves the overall production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the implementation modes of the present application will be described below.
[0016] Figure 1 It is a schematic structural diagram of a double convex lens laser provided by the present invention; Figure 2 The present invention provides a schematic structural diagram of a tube shell and a double convex lens in a double convex lens laser.
[0017] Description of reference numerals: 10. Tube shell; 110. Side wall; 120. Through hole; 20. Base; 30. Double convex lens; 310. First convex surface; 320. Second convex surface; 330. Connecting part; 40. Light source; 50. Heat sink; 60. Backlight detector; 70. Insert core. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0019] The terms "first", "second", etc. in the embodiments of the present invention are only used to distinguish related technical features and do not represent the order of precedence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0020] In the present application, the directions or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "back", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.
[0021] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.
[0022] In the double convex lens laser provided by the present invention, the connection between the double convex lens and the side wall of the tube shell enhances the overall stability of the structure. This not only improves the stability of the lens during the packaging process, but also reduces the risk of lens displacement or damage caused by factors such as vibration or temperature changes. The highly reliable structure ensures the stability and performance consistency of the lens in long-term use. Compared with traditional spherical lenses, the complex process steps required in the manufacturing process are reduced. This not only makes the production process more concise and efficient, but also significantly improves the overall production efficiency. Example
[0023] The embodiment of the present invention provides a double convex lens laser, such as Figure 1 and Figure 2As shown, it includes a tube shell 10, the tube shell 10 includes a side wall 110, and a through hole 120 is opened on the side wall 110; a base 20, the base 20 is connected to the tube shell 10, and there is an accommodating space between the base 20 and the tube shell 10; a double convex lens 30, the double convex lens 30 includes a first convex surface 310 and a second convex surface 320, the first convex surface 310 and the second convex surface 320 are respectively located on both sides of the through hole 120, and the double convex lens 30 and the side wall 110 have a connecting portion 330; a light source 40, the light source 40 is arranged in the accommodating space and is arranged toward the double convex lens 30.
[0024] The use of a double convex lens 30 of this structure can reduce the process steps required for a traditional spherical lens, improve production efficiency, and save production costs. In addition, the double convex lens 30 of the present application has high structural reliability, thereby ensuring high consistency and reliability of the lens packaging.
[0025] Because of its common and mature manufacturing process, the wide application of the biconvex lens 30 in the optical communication system can reduce the complexity and cost of the production process. The biconvex lens 30 of the present application has a simple structure and a relatively low cost, which can effectively reduce the overall cost of the laser emission module.
[0026] Moreover, compared with the optical performance and characteristics, there is no significant difference between the spherical lens and the double convex lens 30 , and the coupling focal length is basically the same as that of the ferrule 70 through the reasonable design of the lens curvature radius.
[0027] like Figure 2 As shown, in at least one possible embodiment, the through hole 120 is provided in the middle of the side wall 110. The through hole 120 opened in the middle helps to disperse the stress on the side wall 110, making the structure of the entire tube shell 10 more stable. This structure can reduce structural deformation or damage caused by external forces (such as vibration, impact, etc.), and further improve the reliability and service life of the laser. The through hole 120 opened in the middle can be used as a precise positioning reference, which helps to achieve higher precision control during the packaging process. This helps to ensure precise alignment between the biconvex lens 30 and the light source 40, thereby improving the overall performance and stability of the laser.
[0028] like Figure 2 As shown, in at least one possible embodiment, the first convex surface 310 is disposed outside the accommodation space, and the second convex surface 320 is disposed inside the accommodation space. More specifically, the arc length of the first convex surface 310 is more than twice the arc length of the second convex surface 320. The longer arc of the first convex surface 310 may more effectively collect and focus the light from the second convex surface 320. This helps to guide more light to the predetermined target area, thereby improving the output efficiency and beam quality of the laser.
[0029] like Figure 2As shown, in at least one possible embodiment, the connection portion 330 is located between the first convex surface 310 and the side wall 110. More specifically, the through hole 120 has a connection portion 330 on both sides. In this way, the design of having a connection portion 330 on both sides of the through hole 120 ensures that the double convex lens 30 is firmly installed on the tube shell 10. This double connection not only improves the vibration and impact resistance of the lens, but also helps to prevent the lens from being displaced or falling off due to external forces during use. The provision of the connection portion 330 helps to disperse the stress between the lens and the side wall 110, reducing the risk of structural damage caused by stress concentration. This optimized stress distribution makes the entire laser structure more stable and improves the reliability of long-term use.
[0030] like Figure 1 As shown, at least in one possible embodiment, the double convex lens 30 laser provided in the embodiment of the present invention further includes a heat sink 50, which is arranged in the accommodation space, and the heat sink 50 is located between the base 20 and the light source 40. It can be understood that the main function of the heat sink 50 is to effectively absorb and conduct the heat generated by the light source 40 during operation. By arranging the heat sink 50 between the base 20 and the light source 40, it can be ensured that the heat is quickly absorbed and dispersed to a larger area, thereby improving the heat dissipation efficiency. This helps to prevent the light source 40 from overheating, prolong its service life, and maintain the stable performance of the laser. Overheating is one of the common causes of laser failure. By introducing the design of the heat sink 50, the failure rate of the laser caused by overheating can be significantly reduced. This structure improves the overall reliability of the laser, enabling it to operate stably under various working conditions. Traditional thermal management solutions may require additional heat dissipation equipment, such as fans or radiators. The design of the heat sink 50 in the embodiment of the present invention simplifies the thermal management solution, and an efficient heat dissipation effect can be achieved without additional heat dissipation equipment. This helps to reduce the manufacturing cost and maintenance cost of the laser.
[0031] like Figure 1As shown, at least in one possible embodiment, the double convex lens 30 laser provided by the embodiment of the present invention also includes a backlight detector 60, and the backlight detector 60 is arranged in the accommodating space. More specifically, the backlight detector 60 is connected to the base 20 through the heat sink 50. In this way, the backlight detector 60 is connected to the base 20 through the heat sink 50, and the excellent thermal conductivity of the heat sink 50 can be used to quickly conduct the heat generated by the backlight detector 60 during operation to the base 20, and then discharged from the body through the heat dissipation system. This helps to reduce the operating temperature of the backlight detector 60, prevent its performance from being degraded or damaged due to overheating, thereby improving the thermal management efficiency of the entire laser. The heat sink 50 serves as a bridge connecting the backlight detector 60 and the base 20, which not only plays a role in heat conduction, but also strengthens the structural connection between the two. This can make the position of the backlight detector 60 in the laser more stable, reducing the risk of displacement or damage caused by vibration or impact.
[0032] One of the main functions of the backlight detector 60 is to monitor the backlight current output by the laser to determine the performance of the laser chip. By placing the backlight detector 60 in the accommodation space and connecting it to the base 20 through the heat sink 50, it can be ensured that the backlight detector 60 can accurately and stably monitor the backlight current, thereby improving the overall performance and reliability of the laser. Placing the backlight detector 60 in the accommodation space and connecting it to the base 20 through the heat sink 50 can simplify the wiring and installation work inside the laser. This makes the internal structure of the laser more compact and neat, which is conducive to reducing manufacturing costs and improving production efficiency.
[0033] In at least one possible embodiment, the light source 40 is an edge-emitting laser diode. For example, an FP laser and a DFB laser. As the light source 40, the laser diode can emit a high-quality light beam with a low divergence angle and high directivity. This helps to ensure that the light can form a clear and focused light spot after passing through the double convex lens 30, thereby improving the output efficiency and beam quality of the laser. The laser diode has a high electro-optical conversion efficiency and can convert more electrical energy into light energy. This means that at the same input power, the laser diode can produce a higher light output power, thereby improving the overall performance of the laser. Laser diodes usually have a long service life and can maintain stable performance under long-term continuous operation. This helps to reduce the maintenance cost of the laser and ensure its reliability in various application scenarios. The laser diode is small in size and compact in structure, and is suitable for integration into the double convex lens 30 laser. This helps to reduce the overall size of the laser and improve its portability and flexibility. The light output of the laser diode can be precisely controlled by current modulation. This enables the double convex lens 30 laser to adjust the light output power and beam characteristics as needed to meet different application requirements. The laser diode has low power consumption when working, which helps to reduce the overall energy consumption of the laser. This is especially important for laser applications that require long-term operation, which can significantly reduce energy consumption and operating costs. As a mature light source 40 technology, laser diodes have high reliability and stability. This allows the double convex lens 30 laser to maintain stable performance output under various working conditions and improve the overall reliability of the system.
[0034] The embodiment of the present invention also provides a double convex lens 30 laser preparation process, wherein the glass for making the double convex lens 30 is cut into glass columns; the glass columns are assembled in the through holes 120 on the tube shell 10; the molten glass columns are cooled on the tube cap to form any of the above-mentioned double convex lens 30 lasers. The use of a double convex lens 30 laser preparation process provided by the embodiment of the present invention can reduce the use of glass solder, further reduce the overall cost, and be more environmentally friendly. More specifically, the high-temperature molten glass column is cooled and formed on the tube cap under the protection of nitrogen. In this way, the glass blank is directly melted on the tube cap, so that the lens and the tube cap are combined into one.
[0035] Thus, first, the glass material for making the biconvex lens 30 is cut into glass columns. Then, the cut glass columns are assembled into the through holes 120 on the tube shell 10. Under the protection of nitrogen, the glass columns are melted at high temperature and cooled and formed on the tube cap. This step is an important step, which determines the shape, optical properties and bonding strength of the biconvex lens 30 with the tube cap. Through melting and cooling molding, the glass blank is directly melted on the tube cap, so that the lens and the tube cap are combined into one, without the need for additional welding steps.
[0036] In the preparation process of the traditional double convex lens 30 laser, glass solder may be needed to fix the lens and the tube cap. The preparation process of the embodiment of the present invention directly cools and molds the molten glass column on the tube cap, without the need to use glass solder, thereby reducing the overall cost. Reducing the use of glass solder not only reduces material costs, but also reduces waste emissions in the production process, which is more environmentally friendly. The preparation process of melt cooling molding makes the combination between the lens and the tube cap tighter and improves the bonding strength. This helps to ensure the long-term stability and reliability of the laser. Through the preparation process of melt cooling molding, the preparation process of the double convex lens 30 laser can be simplified and the production efficiency can be improved. During the melt cooling molding process, the shape and curvature of the lens can be precisely controlled to optimize its optical performance. This helps to ensure that the laser outputs a high-quality beam.
[0037] Compared with the prior art, the biconvex lens laser provided by the embodiment of the present invention has a connection portion 330 between the biconvex lens 30 and the side wall 110 of the tube shell 10, which enhances the overall stability of the structure. This not only improves the stability of the lens during the packaging process, but also reduces the risk of lens displacement or damage caused by factors such as vibration or temperature changes. The highly reliable structure ensures the stability and performance consistency of the lens in long-term use. Compared with traditional spherical lenses, the complex process steps required in the manufacturing process are reduced. This not only makes the production process more concise and efficient, but also significantly improves the overall production efficiency.
[0038] The above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.
Claims
1. Double convex lens laser, characterized in that, include: A tube shell (10), the tube shell (10) comprising a side wall (110), the side wall (110) being provided with a through hole (120); A base (20), the base (20) being connected to the tube shell (10), and an accommodation space being provided between the base (20) and the tube shell (10); A biconvex lens (30), the biconvex lens (30) comprising a first convex surface (310) and a second convex surface (320), the first convex surface (310) and the second convex surface (320) being respectively located on two sides of the through hole (120), and the biconvex lens (30) and the side wall (110) having a connecting portion (330); A light source (40) is disposed in the accommodating space and is arranged toward the biconvex lens (30).
2. The double convex lens laser according to claim 1, characterized in that: The through hole (120) is arranged in the middle of the side wall (110).
3. The double convex lens laser according to claim 1 or 2, characterized in that: The first convex surface (310) is arranged outside the accommodating space, and the second convex surface (320) is arranged inside the accommodating space.
4. The double convex lens laser according to claim 1, characterized in that: The connecting portion (330) is located between the first convex surface (310) and the side wall (110).
5. The double convex lens laser according to claim 1, characterized in that: The through hole (120) has the connecting portion (330) on both sides.
6. The double convex lens laser according to claim 1, characterized in that: It also includes a heat sink (50), which is arranged in the accommodating space, and the heat sink (50) is located between the base (20) and the light source (40).
7. The double convex lens laser according to claim 1, characterized in that: It also includes a backlight detector (60), which is arranged in the accommodating space.
8. The double convex lens laser according to claim 1, characterized in that: The light source (40) is an edge-emitting laser diode.
9. A process for preparing a double convex lens laser, characterized in that: Cutting the glass for making the biconvex lens (30) into glass columns; Assembling the glass column in the through hole (120) on the tube shell (10); The molten glass column is cooled on the tube cap to form a double convex lens (30) laser as described in any one of claims 1 to 8.