Tail fiber laser capable of effectively improving laser power
By adding the design of laser chipset and fiber lenses to the fiber tail laser, the laser power is improved, the problem of insufficient output power of a single-chip laser is solved, and the stability and application range of the laser are improved.
Patent Information
- Application Number
- CN202421134523.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-22
AI Technical Summary
The output power of a single-chip laser is small, which limits its application range, especially when high-power lasers are needed.
Design a fiber tail laser including a TO base, a laser assembly and an optical fiber assembly. The laser assembly consists of pairs of laser chips, which intersects and converges into parallel beams through a concave lens. The optical fiber assembly increases the laser intensity in the optical fiber through an optical fiber lens and Coupling rate.
It effectively improves the output power and stability of the laser, enhances the laser intensity in the optical fiber, and expands the application range of the laser.
Smart Images
Figure CN222338770U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of laser application, in particular to a pigtail laser which can effectively improve the laser power. Background Art
[0002] In the current laser market, single-chip lasers are widely used due to their compact structure and relatively low cost. However, the output power of single-chip lasers is relatively small, which limits their application scope to a certain extent, especially in situations where high-power lasers are required. Utility Model Content
[0003] The main purpose of the utility model is to provide a pigtail laser that can effectively increase laser power, and to improve the output power of the pigtail laser that can effectively increase laser power.
[0004] To achieve the above-mentioned purpose, the utility model provides a pigtail laser for effectively improving laser power, comprising:
[0005] TO base;
[0006] A laser assembly is arranged on the TO base, the laser assembly includes a laser chip group and a concave lens, the laser chip group includes at least two laser chips arranged in pairs, the light emitted by the laser chips of the same laser chip group is arranged to intersect in space, and is arranged to be parallel after passing through the concave lens, and converges into a convergent light beam;
[0007] The optical fiber assembly comprises an optical fiber arranged on the TO base, an optical fiber lens is formed at one end of the optical fiber close to the laser chip, and the converged light beam is coupled into the optical fiber from the optical fiber lens.
[0008] In one embodiment, the laser assembly further includes a fixing block, which is used to mount at least one pair of the laser chips, and the fixing block has two opposite mounting bevels, and the two paired laser chips are disposed on the mounting bevels to intersect the emitted light at a preset point, and the concave lens is close to the preset setting.
[0009] In one embodiment, when at least two pairs of the laser chips are mounted on the fixing block, the laser chips on the same mounting side are arranged to be tilted relative to each other so that the light beams emitted by the laser chips on the same mounting side intersect at the preset point.
[0010] In one embodiment, the fixing block is made of a material having heat dissipation performance.
[0011] In one embodiment, the laser assembly further comprises a heat sink block, the heat sink block is fixedly disposed on the end surface of the TO base, and the fixing block is disposed on the surface of the heat sink block.
[0012] In one embodiment, the pigtail laser that effectively improves laser power also includes a TO cap, which is covered on the TO base and encloses a protective cavity with the TO base. The laser chip is arranged in the protective cavity, and a laser via is opened on the TO cap to allow light emitted by the laser chip to pass through.
[0013] In one embodiment, the optical fiber assembly further includes a coupling shell, one end of the coupling shell is connected to the optical fiber, and the other end is connected to the TO base, so that the optical fiber and the concentrated light beam are coupled in the coupling shell, and the material of the coupling shell is configured as a transparent material, and the ultraviolet colloid is solidified by ultraviolet light irradiation, so that the coupling shell, the optical fiber and the TO base are relatively fixed.
[0014] In one embodiment, the optical fiber assembly also includes a ferrule, a coupling cavity is provided in the coupling shell, the collected light beam enters the coupling cavity from one end of the coupling cavity, a fiber core jack connected to the coupling cavity is provided at the other end of the coupling cavity, the ferrule is installed in the fiber core jack, the optical fiber is inserted into the ferrule, and one end provided with the optical fiber lens extends into the coupling cavity.
[0015] In one embodiment, the laser assembly further comprises a tube body, which is arranged around the laser chip, one end of the tube body is fixedly connected to the TO base, and the other end is connected to the optical fiber, and the concave lens is arranged in the tube body.
[0016] In one embodiment, the coupling housing and the tube body are configured as the same structure, and the laser passes through the concave lens, the coupling cavity, and the optical fiber lens in sequence.
[0017] In the technical solution of the utility model, a pigtail laser for effectively improving laser power comprises a TO base, a laser assembly and an optical fiber assembly, wherein the laser assembly is arranged on the TO base, the laser assembly comprises a laser chipset and a concave lens, the laser chipset comprises at least two laser chips arranged in pairs, and the power of the laser output by the pigtail laser for effectively improving laser power is improved by increasing the number of laser chips. Specifically, the light emitted by the laser chips of the same group of laser chipset is arranged to intersect in space, and the concave lens is arranged near the intersection of the light, so that the light is arranged in parallel after passing through the concave-convex mirror and converges into a converged light beam. The optical fiber assembly comprises an optical fiber arranged on the TO base, and an optical fiber lens is formed at one end of the optical fiber close to the laser chip, and the converged light beam is coupled into the optical fiber from the optical fiber lens. On the one hand, since the collected light beam refracted by the concave lens is parallel light, it can be understood that the distance between the concave lens and the fiber lens will not have a significant impact on the coupling of the collected light beam and the optical fiber. That is, when the optical fiber moves along its own axial direction, that is, when the position of the laser chipset is offset along the axial direction of the optical fiber, the collected light beam and the fiber lens can still be aligned for coupling, which helps to improve the stability of the pigtail laser that effectively increases the laser power. On the other hand, the fiber lens is polished on the end face of the optical fiber close to the concave lens. The setting of the fiber lens helps to improve the coupling rate between the optical fiber and the collected light beam laser, helps to enhance the laser intensity in the optical fiber, and improves the output power of the laser. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] 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 the structures shown in these drawings without paying creative work.
[0019] Figure 1 An exploded view of an embodiment of a pigtail laser for effectively increasing laser power provided by the utility model;
[0020] Figure 2 for Figure 1 a cross-sectional view of the illustrated embodiment;
[0021] Figure 3 for Figure 1 A schematic diagram of a partial structure of the embodiment shown;
[0022] Figure 4 for Figure 1 Another partial structural schematic diagram of the embodiment shown;
[0023] Figure 5 for Figure 1 Diagram of the working principle of a concave lens.
[0024] Description of Figure Numbers:
[0025] 100, TO base;
[0026] 200, laser assembly; 21, laser chip set; 211, laser chip; 22, concave lens; 23, fixing block; 231, mounting slope; 24, heat sink block;
[0027] 300, optical fiber assembly; 31, optical fiber; 311, optical fiber lens; 32, ferrule;
[0028] 400, TO cap; 41, protection cavity; 42, laser via;
[0029] 500, coupling housing; 51, coupling cavity; 52, fiber core jack.
[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0034] The utility model provides a pigtail laser which can effectively improve the laser power.
[0035] See also Figures 1 to 5In one embodiment of the utility model, the pigtail laser that effectively improves the laser power includes a TO base 100, a laser assembly 200 and an optical fiber assembly 300, wherein the laser assembly 200 is arranged on the TO base 100, the laser assembly 200 includes a laser chipset 21 and a concave lens 22, the laser chipset 21 includes at least two laser chips 211 arranged in pairs, and the power of the laser output by the pigtail laser that effectively improves the laser power is increased by increasing the number of laser chips 211. Specifically, the light emitted by the laser chips 211 of the same group of laser chipset 21 is arranged to intersect in space, and the concave lens 22 is arranged near the intersection of the light, so that the light is arranged in parallel after passing through the concave-convex mirror, and converges into a converged light beam. It should be noted that after the light emitted by the laser chip 211 is refracted by the concave lens 22, the refracted light has overlapping parts to combine into a converged light beam, that is, convergence refers to the process of combining multiple beams of light into one beam of light after refraction. The optical fiber assembly 300 includes an optical fiber 31 disposed on a TO base 100. An optical fiber lens 311 is formed at one end of the optical fiber 31 near the laser chip 211, and the collected light beam is coupled into the optical fiber 31 from the optical fiber lens 311. On the one hand, since the collected light beam refracted by the concave lens 22 is parallel light, it can be understood that the distance between the concave lens and the optical fiber lens 311 will not have a significant effect on the coupling between the collected light beam and the optical fiber 31, that is, when the optical fiber 31 moves along its own axial direction, that is, when the position of the laser chip group 21 along the axial direction of the optical fiber 31 is offset, the collected light beam and the optical fiber lens 311 can still be aligned for coupling, which helps to improve the stability of the pigtail laser that effectively increases the laser power. On the other hand, the optical fiber lens 311 is polished on the end face of the optical fiber 31 near the concave lens 22. The setting of the optical fiber lens 311 helps to improve the coupling rate between the optical fiber 31 and the collected light beam laser, helps to enhance the laser intensity in the optical fiber 31, and improves the output power of the laser.
[0036] Among them, the TO package, the full name of which is "Transistor Outline" package, is a standard shape for packaging transistors (transistor). This packaging method is mainly used for power transistors and some other semiconductor devices. The TO package usually has a metal shell to facilitate heat dissipation and connection to the circuit board. The TO package is a typical metal package with excellent performance of high speed and high thermal conductivity. For high-speed devices in optical communications, the use of metal TO shell packaging can achieve a transmission rate of more than 25Gbit / s; for electronic devices or modules that require high heat dissipation efficiency, the use of high thermal conductivity TO shell packaging can achieve better heat dissipation effects. Typically, the TO shell includes a TO base 100 and a TO cap 400.
[0037] In one embodiment, the laser assembly 200 further includes a fixed block 23, the fixed block 23 is used to install at least one pair of laser chips 211, and the fixed block 23 has two opposite mounting bevels 231, and the two paired laser chips 211 are respectively arranged on the mounting bevels 231. At this time, the angle formed by the two mounting bevels 231 is the angle formed by the laser optical fiber 31, so that the emitted light intersects at a preset point, the concave lens 22 is close to the preset setting, and the focus F1 of the concave lens 22 coincides with the preset point. It can be understood that by controlling the angle between the mounting bevels 231 of the molding and the fixed block 23, the angle between the preset point and the laser chip 211 can be controlled, and then the installation position of the concave lens 22 can be controlled. In other embodiments, there can also be a fine-tuning platform between the laser chip 211 and the TO base 100, and the fine-tuning platform can be rotated on the TO base 100, so that the pair of laser chips 211 are relatively tilted, so that the light emitted by the laser chip 211 can intersect at the preset point.
[0038] In one embodiment, a pair of laser chips 211 is disposed on the fixing block 23. In another embodiment, when at least two pairs of laser chips 211 are mounted on the fixing block 23, the laser chips 211 on the same mounting side are arranged to be tilted relative to each other, so that the light beams emitted by the laser chips 211 on the same mounting side intersect at a preset point, so that the light beams emitted by all the laser chips 211 in the same laser chip group 21 intersect at the preset point.
[0039] In one embodiment, the material of the fixing block 23 is configured as a material with heat dissipation performance. The laser chip 211 generates a large amount of heat when working, and the fixing block 23 can absorb the heat generated by the laser chip 211 to reduce the probability of overheating and burning of the laser chip 211. In other embodiments, a small cooling fan can be provided on the TO base 100 to dissipate heat from the laser chip 211.
[0040] In one embodiment, the laser assembly 200 further includes a heat sink block 24, which is fixedly disposed on the end surface of the TO base 100, and a fixing block 23 is disposed on the surface of the heat sink block. Furthermore, the laser chip 211 is fixed to the fixing block 23 by bonding with a high thermal conductivity silver glue to prevent the glue from melting due to the excessive temperature of the laser chip 211, and to prevent the laser chip 211 from deflecting on the fixing block 23 during use. Heat is drawn out from the laser chip 211 and introduced into the heat sink block 24 through the fixing block 23 to achieve heat dissipation.
[0041] In one embodiment, the pigtail laser that effectively improves the laser power further includes a TO tube cap 400, which is covered on the TO base 100 and encloses a protective cavity 41 with the TO base 100. The laser chip 211 is disposed in the protective cavity 41, and a laser via 42 is provided on the TO tube cap 400 for the light emitted by the laser chip 211 to pass through. The TO tube cap 400 and the TO base 100 together form a packaging structure to prevent the laser chip group 21 inside the protective cavity 41 from being interfered with by the outside. In other embodiments, the TO tube cap 400 may not be provided.
[0042] In one embodiment, the optical fiber assembly 300 further includes a coupling housing 500, one end of the coupling housing 500 is connected to the optical fiber 31, and the other end is connected to the TO base 100, so that the optical fiber 31 and the collected light beam are coupled in the coupling housing 500, and the material of the coupling housing 500 is configured as a transparent material, and the ultraviolet colloid is solidified by ultraviolet light irradiation, so that the coupling housing 500 is relatively fixed to the optical fiber 31 and the TO base 100. Laser welding is currently considered to be the most effective packaging method for optical fiber 31 devices, and this method has the characteristics of high energy density, deep penetration, high precision and strong adaptability. Laser welding is an efficient and dense welding method that uses a high-energy laser beam as a heat source for welding, and fixes two metals together by melting, cooling and solidification. However, the thermal expansion and contraction of the metal will cause the welding offset of the optical fiber 31 device. This phenomenon caused by the shrinkage of the metal solidification is called post-weld offset. Before laser welding, the operator will align the laser chip 211 and the optical fiber 31 to the optimal position, and the offset after welding causes the optical fiber 31 and the laser chip 211 to deviate from the optimal position when they are aligned. Due to the existence of this inevitable and uncontrollable stress, the coupling amount of the optical fiber 31 is greatly affected, as well as the stability of the pigtail laser that effectively improves the laser power. UV glue is applied to the connection between the optical fiber 31 and the coupling shell 500. After adjusting the position of the optical fiber 31, the circumference of the coupling shell 500 is irradiated with ultraviolet light at the same time. The ultraviolet light passes through the transparent coupling shell 500 to evenly irradiate the optical fiber 31, which can greatly reduce the relative displacement of the coupling device before and after the coupling, and effectively improve the coupling efficiency. In other embodiments, the optical fiber 31 can also be fixed by a clamping assembly.
[0043] In one embodiment, the optical fiber assembly 300 further includes a ferrule 32, a coupling cavity 51 is provided in the coupling housing 500, the collected light beam enters the coupling cavity 51 from one end of the coupling cavity 51, the other end of the coupling cavity 51 is provided with a fiber core plug hole 52 connected to the coupling cavity 51, the ferrule 32 is installed in the fiber core plug hole 52, the optical fiber 31 is inserted in the ferrule 32, and one end provided with the optical fiber lens 311 extends into the coupling cavity 51. Since the optical fiber 31 is very fragile, the ferrule 32 is used to fix the light to the coupling housing 500, and the ferrule 32 can protect the optical fiber 31.
[0044] In one embodiment, the laser assembly 200 further includes a tube body, which is disposed around the laser chip 211, one end of the tube body is fixedly connected to the TO base 100, and the other end is connected to the optical fiber 31, and the concave lens 22 is disposed in the tube body. The tube body is used to install the concave lens 22, that is, the TO base 100, the tube body and the coupling housing 500 are connected in sequence, and the ultraviolet colloid is solidified by ultraviolet light irradiation, so that the TO base 100, the tube body and the coupling housing 500 are relatively fixed.
[0045] In one embodiment, the coupling housing 500 and the tube body are configured as the same structure, and the laser passes through the concave lens 22, the coupling cavity 51, and the fiber lens 311 in sequence. This allows the concave lens 22 and the fiber core jack 52 to be naturally coaxial in the coupling housing 500, simplifying an adjustment process when assembling a pigtail laser that effectively increases the laser power. In other embodiments, the coupling housing 500 and the tube body may also be separately arranged.
[0046] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A pigtail laser that effectively increases laser power, characterized in that: include: TO base; A laser assembly is arranged on the TO base, the laser assembly includes a laser chip group and a concave lens, the laser chip group includes at least two laser chips arranged in pairs, the light emitted by the laser chips of the same laser chip group is arranged to intersect in space, and is arranged to be parallel after passing through the concave lens, and converges into a convergent light beam; The optical fiber assembly comprises an optical fiber arranged on the TO base, an optical fiber lens is formed at one end of the optical fiber close to the laser chip, and the converged light beam is coupled into the optical fiber from the optical fiber lens.
2. The pigtail laser for effectively improving laser power as claimed in claim 1, characterized in that: The laser assembly also includes a fixing block, which is used to install at least one pair of the laser chips. The fixing block has two opposite mounting bevels, and the two paired laser chips are respectively arranged on the mounting bevels to make the emitted light intersect at a preset point, and the concave lens is close to the preset setting.
3. The pigtail laser for effectively improving laser power as claimed in claim 2, characterized in that: When at least two pairs of the laser chips are mounted on the fixing block, the laser chips on the same mounting side are arranged to be tilted relative to each other, so that the light beams emitted by the laser chips on the same mounting side intersect at the preset point.
4. The pigtail laser for effectively improving laser power as claimed in claim 2, characterized in that: The material of the fixing block is configured as a material with heat dissipation performance.
5. The pigtail laser for effectively improving laser power as claimed in claim 4, characterized in that: The laser assembly further comprises a heat sink block, the heat sink block is fixedly arranged on the end surface of the TO base, and the fixing block is arranged on the surface of the heat sink block.
6. The pigtail laser for effectively improving laser power as claimed in claim 1, characterized in that: The pigtail laser that effectively improves laser power also includes a TO tube cap, which is covered on the TO base and encloses a protective cavity with the TO base. The laser chip is arranged in the protective cavity, and a laser via is opened on the TO tube cap to allow light emitted by the laser chip to pass through.
7. The pigtail laser for effectively improving laser power as claimed in claim 1, characterized in that: The optical fiber assembly also includes a coupling shell, one end of the coupling shell is connected to the optical fiber, and the other end is connected to the TO base, so that the optical fiber and the concentrated light beam are coupled in the coupling shell, and the material of the coupling shell is configured as a transparent material, and the ultraviolet colloid is solidified by ultraviolet light irradiation, so that the coupling shell, the optical fiber and the TO base are relatively fixed.
8. The pigtail laser for effectively improving laser power as claimed in claim 7, characterized in that: The optical fiber assembly also includes a ferrule, a coupling cavity is provided in the coupling shell, the collected light beam enters the coupling cavity from one end of the coupling cavity, a fiber core plug connected to the coupling cavity is provided at the other end of the coupling cavity, the ferrule is installed in the fiber core plug, the optical fiber is inserted in the ferrule, and one end provided with the optical fiber lens extends into the coupling cavity.
9. The pigtail laser for effectively improving laser power as claimed in claim 8, characterized in that: The laser assembly also includes a tube body, which is arranged around the laser chip, one end of the tube body is fixedly connected to the TO base, and the other end is connected to the optical fiber, and the concave lens is arranged in the tube body.
10. The pigtail laser for effectively improving laser power as claimed in claim 9, characterized in that: The coupling housing and the tube body are configured as the same structure, and the laser passes through the concave lens, the coupling cavity and the optical fiber lens in sequence.