Laser with Return Optical Monitoring Function

Abstract

The present application provides a laser with a return light monitoring function, comprising: a laser generator for emitting a first laser; a laser monitoring module connected to the optical path of the laser generator; and a processor electrically connected to the laser generator; the processor being configured to: when a light-absorbing object or a light-transmitting object is set in the light-emitting direction of the laser monitoring module, construct a functional relationship between the electrical signal intensity and optical power established based on the laser generator and the laser monitoring module; when an object to be processed is set in the light-emitting direction of the laser monitoring module, construct a functional relationship between a threshold electrical signal and optical power established based on the laser generator, the laser monitoring module, and the object to be processed to obtain a threshold electrical signal corresponding to the first superimposed laser; and control the laser generator to remain in an on state or enter an off state based on a comparison result of the real-time electrical signal of the first superimposed laser and the threshold electrical signal of the first superimposed laser. The laser of the embodiment of the present application can avoid being damaged by return light.

Description

Technical Field

[0001] The present application relates to the field of laser technology, and in particular to a laser with a return light monitoring function. Background Art

[0002] Semiconductor laser applications include welding and cladding. In these two applications, the materials being processed are often highly reflective, such as aluminum alloys and copper, which have a laser reflectivity greater than 95%. When the laser irradiates the workpiece, intense laser light travels back along the optical path into the laser, ultimately entering the pump source.

[0003] Over extended laser operation, damage to the chip within the pump source accumulates and deepens. End-user experience shows a gradual decrease in laser output power, impacting process performance and even failing to meet technical requirements. The impact of return light on semiconductor lasers is significant and irreversible. Summary of the Invention

[0004] The embodiments of the present application provide a laser with a return light monitoring function, which can avoid damage caused by return light.

[0005] The embodiment of the present application provides a laser with a return light monitoring function, comprising:

[0006] a laser generator, configured to emit a first laser;

[0007] A laser monitoring module connected to the optical path of the laser generator; when a light-absorbing or light-transmitting object is set in the light-emitting direction of the laser monitoring module, a first laser beam propagating in a forward direction is generated in the laser monitoring module; at this time, the laser monitoring module is used to obtain a real-time electrical signal corresponding to the optical signal of the first laser beam; when an object to be processed is set in the light-emitting direction of the laser monitoring module, a first laser beam propagating in a forward direction and a first return light propagating in a reverse direction are simultaneously generated in the laser monitoring module, and the superposition of the first laser beam and the first return light is called a first superposition laser beam. At this time, the laser monitoring module is used to obtain a real-time electrical signal corresponding to the optical signal of the first superposition laser beam; and

[0008] A processor is electrically connected to the laser generator; the processor is configured to: when a light-absorbing object or a light-transmitting object is set in the light-emitting direction of the laser monitoring module, construct a functional relationship between the electrical signal intensity and the optical power established by the laser generator and the laser monitoring module; when an object to be processed is set in the light-emitting direction of the laser monitoring module, construct a functional relationship between a threshold electrical signal and the optical power established by the laser generator, the laser monitoring module and the object to be processed based on the functional relationship between the electrical signal intensity and the optical power established by the laser generator and the laser monitoring module and the return light residual coefficient of the object to be processed, so as to obtain a threshold electrical signal corresponding to the first superimposed laser; and control the laser generator to remain in an on state or enter an off state according to a comparison result between the real-time electrical signal of the first superimposed laser and the threshold electrical signal of the first superimposed laser.

[0009] In an embodiment of the present application, a real-time electrical signal corresponding to the optical signal of the first superimposed laser is obtained through a laser monitoring module, and a functional relationship between a threshold electrical signal and optical power established based on the laser generator, the laser monitoring module and the object to be processed is constructed through a processor to obtain a threshold electrical signal corresponding to the first superimposed laser; the processor controls the laser generator to remain in an on state or enter an off state based on a comparison result of the real-time electrical signal of the first superimposed laser and the threshold electrical signal of the first superimposed laser, thereby preventing the laser from being damaged by return light. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0011] Figure 1 A schematic diagram of the structure of a laser with return light monitoring function provided in an embodiment of the present application.

[0012] Figure 2 For Figure 1 The diagram shows the working state of the laser when a light absorbing object or a light transmitting object is set in the light emitting direction of the laser.

[0013] Figure 3 For Figure 1 The working state diagram of the laser when the light output direction of the laser is set to the object to be processed

[0014] Figure 4 for Figure 3 Schematic diagram of the first laser and the first return light superimposed to form the first superimposed laser.

[0015] Figure 5 for Figure 1Another structural schematic diagram of the laser.

[0016] Figure 6 This is a schematic diagram of the structure of the laser monitoring module provided in an embodiment of the present application.

[0017] Figure 7 for Figure 6 Bottom view of the structure shown.

[0018] Figure 8 for Figure 6 The structure shown is a cross-sectional view along the P1-P1 direction.

[0019] Figure 9 for Figure 6 Schematic diagram of the structure of the heat sink shell shown in .

[0020] Figure 10 for Figure 9 The heat sink structure is shown as a cross-sectional view along the P2-P2 direction.

[0021] Figure 11 for Figure 10 A schematic structural diagram of the first shell and the second shell is shown in FIG. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0023] In the description of this application, it should be understood that the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. For ease of description, a laser with a return light monitoring function will be referred to simply as a laser.

[0024] See also Figure 1 An embodiment of the present application provides a laser 2 with a return light monitoring function. The laser 2 includes: a laser generator 10, a laser monitoring module 30 and a processor 50.

[0025] See also Figure 1 The laser generator 10 is used to emit the first laser L1.

[0026] See also Figure 1 The laser monitoring module 30 is optically connected to the laser generator 10.

[0027] See also Figure 2When a light absorbing object 800 or a light transmitting object 600 is set in the light emitting direction of the laser monitoring module 30, a forward-propagating first laser L1 is formed in the laser monitoring module 30; at this time, the laser monitoring module 30 is used to obtain a real-time electrical signal corresponding to the optical signal of the first laser L1.

[0028] See also Figure 3 When the object to be processed 400 is set in the light emitting direction of the laser monitoring module 30, the first laser L1 propagating in the forward direction and the first return light L2 propagating in the reverse direction are simultaneously formed in the laser monitoring module 30. The superposition of the first laser L1 and the first return light L2 is called the first superimposed laser L3. At this time, the laser monitoring module 30 is used to obtain a real-time electrical signal corresponding to the optical signal of the first superimposed laser L3.

[0029] See also Figure 1 , the processor 50 is electrically connected to the laser generator 10.

[0030] See also Figure 2 The processor 50 is configured to: when a light absorbing object 800 or a light transmitting object 600 is set in the light emitting direction of the laser monitoring module 30, construct a functional relationship between the electrical signal intensity and the optical power established based on the laser generator 10 and the laser monitoring module 30.

[0031] See also Figure 3 The processor 50 is further configured to: when the object to be processed 400 is set in the light emitting direction of the laser monitoring module 30, according to the functional relationship between the electrical signal intensity and the optical power established based on the laser generator 10 and the laser monitoring module 30, and the return light residual coefficient of the object to be processed 400, construct a functional relationship between the threshold electrical signal and the optical power established based on the laser generator 10, the laser monitoring module 30 and the object to be processed 400 to obtain the threshold electrical signal corresponding to the first superimposed laser L3.

[0032] See also Figure 3 The processor 50 is further configured to control the laser generator 10 to remain in the on state or enter the off state according to the comparison result between the real-time electrical signal of the first superimposed laser L3 and the threshold electrical signal of the first superimposed laser L3.

[0033] See also Figure 5 In some embodiments, the laser 2 further includes a host computer 20. The host computer 20 is signal-connected to the processor 50 for receiving instructions from the host computer 20 and for transmitting the operating status of the laser generator 10 to the host computer 20. In some embodiments, the laser 2 further includes an indicator light 40 and / or a buzzer 60. The operating status of the laser generator 10 is indicated by the different colors of the indicator light 40 or by whether the indicator light 40 is on or off. The operating status of the laser generator 10 is indicated by the sounding or silence of the buzzer 60.

[0034] The working state of the laser generator 10 may include an on state and an off state.

[0035] See also Figure 6-Figure 8 The laser monitoring module 30 includes: an optical fiber body 301 and a photoelectric sensor 303 .

[0036] The optical fiber body 301 comprises a core layer and a cladding layer, wherein the cladding layer is arranged on the periphery of the core layer; at least a portion of the cladding layer is stripped off to form a stripping opening 3013a. When the first laser light L1 or the first superimposed laser light L3 is transmitted through the optical fiber body 301, the cladding light of the first laser light L1 or the first superimposed laser light L3 transmitted through the cladding layer overflows from the stripping opening 3013a to form the first overflow light L4.

[0037] The photoelectric sensor 303 is electrically connected to the processor 50 and is used to receive the overflow light and convert the optical signal of the first overflow light L4 into a real-time electrical signal, the intensity of which is used to characterize the optical power of the first superimposed laser L3.

[0038] It should be explained that, for the convenience of description, in the embodiment of the present application, the light that overflows from the stripping port 3013a when the first laser L1 is transmitted through the optical fiber body 301, and the light that overflows from the stripping port 3013a when the first superimposed laser L3 is transmitted through the optical fiber body 301, are collectively referred to as the first overflow light L4.

[0039] See also Figure 6-Figure 8 , the depth of the stripping opening 3013a is less than the thickness of the cladding.

[0040] It can be understood that the stripping opening 3013a is a groove formed by stripping a portion of the cladding, thereby destroying the cladding and forming a gap. The depth of this groove is less than the thickness of the cladding, meaning that cladding material still exists between the bottom of the groove and the surface of the core layer. The cladding is provided with the stripping opening 3013a, which destroys the cladding structure, allowing cladding light to escape from the stripping opening 3013a. Cladding material still exists between the stripping opening 3013a and the core layer, preventing the core light from escaping through the stripping opening 3013a.

[0041] See also Figure 6-Figure 8 The optical fiber body 301 includes a light incident section 3011, a light leakage section 3013, and a light output section 3015 connected in sequence; at least a portion of the cladding of the light leakage section 3013 is stripped to form a stripping opening 3013a.

[0042] The laser monitoring module 30 also includes a heat sink 302; including a heat sink shell 310, which encloses a first channel 320, a receiving space 340, and a second channel 360 that are connected in sequence; the heat sink shell 310 is provided with an opening 380, which is connected to the receiving space 340, and the photoelectric sensor 303 is arranged at the opening 380; the heat sink shell 310 is used to encapsulate the optical fiber body 301; when the optical fiber body 301 is encapsulated in the heat sink shell 310, the light leakage section 3013 is located in the receiving space 340, the light incident section 3011 extends from the first channel 320 to the outside of the heat sink shell 310, and the light output section 3015 extends from the second channel 360 to the outside of the heat sink shell 310.

[0043] See also Figures 9-11 The heat sink housing 310 includes a first housing 3120 and a second housing 3140. The first housing 3120 includes a first sidewall 3123 and a second sidewall 3125 disposed opposite each other. The first sidewall 3123 is provided with a first groove 3123a, a first sink 3123b, and a second groove 3123c that are sequentially connected. The second housing 3140 includes a third sidewall 3143 and a fourth sidewall 3145 disposed opposite each other. The third sidewall 3143 is provided with a third groove 3143a, a second sink 3143b, and a fourth groove 3143c that are sequentially connected. An opening 380 is provided in the first housing 3120. One end of the opening 380 is connected to the first sink 3123b, and the other end of the opening 380 is connected to the second sidewall 3125.

[0044] When the first shell 3120 and the second shell 3140 are arranged in a manner such that the first side wall 3123 and the second side wall 3125 are in contact with each other, the first groove 3123a and the third groove 3143a are combined to form a first channel 320, the first sinking groove 3123b and the second sinking groove 3143b are combined to form an accommodating space 340, and the second groove 3123c and the fourth groove 3143c are combined to form a second channel 360.

[0045] Exemplarily, the functional relationship between the electrical signal intensity and the optical power established between the laser generator 10 and the laser monitoring module 30 corresponds to a first functional relationship, which is:

[0046] V=k i *P+b i , i=1,2,3…N, N is a positive integer;

[0047] Where P is the optical power in watts; V is the electrical signal strength in millivolts; N represents the optical power interval [0, P max ] is divided into N sub-optical power intervals, P max is the rated optical power of the laser transmitter; i represents the i-th sub-optical power interval in N sub-optical power intervals, ki is the slope of the linear function formed by fitting the optical power in the ith sub-optical power interval to the corresponding electrical signal intensity; b i is the intercept of the linear function formed by fitting the optical power in the i-th sub-optical power interval and the corresponding electrical signal intensity.

[0048] See also Figure 2 When a light absorbing object 800 or a light transmitting object 600 is set in the light emitting direction of the laser monitoring module 30, a first laser L1 propagating in the forward direction is generated in the laser monitoring module 30. Figure 6-Figure 8 When the first laser L1 or the first superimposed laser L3 is transmitted through the optical fiber body 301, the cladding light of the first laser L1 or the first superimposed laser L3 transmitted through the cladding overflows from the stripping port 3013a to form the first overflow light L4. Figure 2 、 Figure 3 and Figure 6 - Figure 8 The proportional relationship between the optical power of the first laser L1 and the optical power of the first overflow light L4 corresponding to the first laser L1 is explained as follows.

[0049] On the one hand, when the first laser light L1 is transmitted through the optical fiber body 301, the vast majority of the first laser light L1 is transmitted through the core layer, and a smaller portion is transmitted through the cladding layer. The ratio of the optical power of the laser light transmitted through the core layer to the optical power transmitted through the cladding layer is determined by the design parameters and manufacturing process of the laser generator. Therefore, when the same laser generator is used to emit laser light, the ratio of the optical power of the first laser light L1 transmitted through the core layer to the optical power of the laser light transmitted through the cladding layer is determined.

[0050] Meanwhile, of the laser light propagating forward through the cladding, some escapes through the stripping port 3013a, while some passes through the stripping port 3013a and continues to propagate through the cladding. Since the opening size of the stripping port 3013a remains constant, the optical efficiency of the laser light propagating within the cladding and that escaping through the stripping port 3013a remain constant.

[0051] Therefore, the optical power of the first laser L1 , the optical power of the cladding light of the first laser L1 , and the optical power of the first overflow light L4 corresponding to the first laser L1 are proportional to each other.

[0052] For example, the optical power range of the laser generator 10 is [0, P max ] includes N sub-optical power intervals formed by sequential division, the i-th sub-optical power interval is [Pi-1, Pi], i = 1, 2, 3, ... N, N is a positive integer; P0 = 0, P N＝ P max; The laser generator 10 is configured to emit N lasers; the optical power of the i-th laser emitted is P i ;

[0053] When the object to be processed 400 is not provided in the light emitting direction of the laser monitoring module 30 or a light absorbing object 800 is provided, the optical fiber body 301 is used to receive and transmit the i-th laser beam; when the i-th laser beam is transmitted through the optical fiber body 301, the cladding light transmitted by the i-th laser beam through the cladding overflows from the stripping port 3013a to form the i-th overflow light; the photoelectric sensor 303 receives the i-th overflow light and converts the optical signal of the i-th overflow light into the i-th electrical signal, the intensity of the i-th electrical signal being Vi;

[0054] The processor 50 is configured to: control the laser generator 10 to emit the i-th laser; and after obtaining the electrical signal corresponding to the i-th laser, emit the i+1-th laser; obtain and store the electrical signal Vi corresponding to the i-th laser; the processor 50 is also configured to: perform linear fitting on the optical power of the i-th laser and the electrical signal intensity corresponding to the i-th laser (Pi, Vi), and the optical power of the i+1-th laser and the electrical signal intensity corresponding to the i+1-th laser (Pi+1, Vi+1), to obtain the functional relationship of the electrical signal intensity corresponding to the i-th sub-optical power interval [Pi-1, Pi] with respect to the optical power, i=1,2,3,…N, N is a positive integer, thereby obtaining the first functional relationship.

[0055] For example, the optical power range of the laser generator 10 is [0, P max ] includes 10 sub-optical power intervals formed in sequence, the first sub-optical power interval is [0, 10%*P max ], the second sub-light power interval is [10%*P max , 20%*P max ], the third sub-light power interval is [20%*P max , 30%*P max ], ..., the 9th sub-light power interval is [80%*P max , 90%*P max ], the 10th sub-light power interval is [90%*P max , P max ].

[0056] Exemplarily, the functional relationship between the threshold electrical signal and the optical power established based on the laser generator 10, the laser monitoring module 30, and the object to be processed 400 corresponds to a second functional relationship, which is:

[0057] V′=(k i *P+b i )*(1+Δ), i=1, 2, 3…N, where N is a positive integer;

[0058] Wherein, P is the optical power in watts; Δ is the return light margin coefficient of the object to be processed 400; V′ is the intensity of the threshold electrical signal; N represents the optical power interval [0, P max ] is divided into N sub-optical power intervals, P max is the rated optical power of the laser transmitter; i represents the i-th sub-optical power interval in N sub-optical power intervals, k i is the slope of the linear function formed by fitting the optical power in the ith sub-optical power interval to the corresponding electrical signal intensity; b i is the intercept of the linear function formed by fitting the optical power in the i-th sub-optical power interval and the corresponding electrical signal intensity.

[0059] It is understood that the residual coefficient of the return light of the object 400 is an empirical value. The residual coefficient of the return light of the object 400 is related to factors such as the material type of the object 400 and the surface finish of the object 400. The value range of the residual coefficient of the return light of the object 400 is 5%-20%.

[0060] Exemplarily, the return light margin coefficient is 5%-20%.

[0061] For example, see Figure 1-Figure 4 The processor 50 is configured to: compare the intensity of the real-time electrical signal of the first superimposed laser L3 with the intensity of the threshold electrical signal of the first superimposed laser L3; if the intensity of the real-time electrical signal of the first superimposed laser L3 is less than the intensity of the threshold electrical signal of the first superimposed laser L3, control the laser generator 10 to remain in the on state; if the intensity of the real-time electrical signal of the first superimposed laser L3 is equal to or greater than the intensity of the threshold electrical signal of the first superimposed laser L3, control the laser generator 10 to enter the off state.

[0062] Understandably, see Figure 3 and Figure 4 When the object 400 is positioned in the light-emitting direction of the laser monitoring module 30, forward-propagating first laser light L1 and backward-propagating first return light L2 are simultaneously generated within the laser monitoring module 30. The superposition of the first laser light L1 and the first return light L2 is called first superimposed laser light L3. Each first superimposed laser light L3 has a unique corresponding first laser light L1.

[0063] The optical power range of the laser generator 10 is [0, P max ] includes N sub-optical power intervals formed by sequential division, the i-th sub-optical power interval is [Pi-1, Pi], i = 1, 2, 3, ... N, N is a positive integer; P0 = 0, P N＝ P max .

[0064] The intensity of the real-time electrical signal of the first superimposed laser light L3 is the intensity of the electrical signal acquired by the processor 50 from the photoelectric sensor 303 when the first superimposed laser light L3 is transmitted through the optical fiber body 301 .

[0065] The processor 50 obtains the intensity of the threshold electrical signal of the first superimposed laser L3 in the following manner:

[0066] Determine the optical power of the first laser L1 corresponding to the first superimposed laser L3; the optical power of the first laser L1 is determined, that is, the second functional relationship V′=(k i *P+b i )*(1+Δ) in the P value;

[0067] Determine that the optical power of the first laser L1 is within the optical power range [0, P max ] in the interval, determine the value of i based on this, and determine k based on the value of i i Value and b i value;

[0068] Determine a corresponding return light residual coefficient Δ value according to the object to be processed 400;

[0069] The k i Value and b i value, and the determined Δ value; the determined P value is brought into the second functional relationship V′=(k i *P+b i )*(1+Δ), and the intensity of the threshold electrical signal corresponding to the first superimposed laser L3, that is, the V′ value, is obtained.

[0070] The processor compares the intensity of the real-time electrical signal of the first superimposed laser L3 with the intensity of the threshold electrical signal of the first superimposed laser L3. If the intensity of the real-time electrical signal of the first superimposed laser L3 is less than the intensity of the threshold electrical signal of the first superimposed laser L3, the processor controls the laser generator 10 to remain in the on state; if the intensity of the real-time electrical signal of the first superimposed laser L3 is equal to or greater than the intensity of the threshold electrical signal of the first superimposed laser L3, the processor controls the laser generator 10 to enter the off state.

[0071] The above is a detailed introduction to the laser and laser with return light monitoring function provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A laser with a return light monitoring function, characterized in that: include: a laser generator, configured to emit a first laser; Laser monitoring module; connected to the optical path of the laser generator; when a light-absorbing object or a light-transmitting object is set in the light-emitting direction of the laser monitoring module, a first laser propagating in a forward direction is formed in the laser monitoring module; at this time, the laser monitoring module is used to obtain a real-time electrical signal corresponding to the optical signal of the first laser; when an object to be processed is set in the light-emitting direction of the laser monitoring module, a first laser propagating in a forward direction and a first return light propagating in a reverse direction are simultaneously formed in the laser monitoring module, and the superposition of the first laser and the first return light is called a first superimposed laser. At this time, the laser monitoring module is used to obtain a real-time electrical signal corresponding to the optical signal of the first superimposed laser; and a processor electrically connected to the laser generator; the processor being configured to: when a light absorbing object or a light transmitting object is set in the light emitting direction of the laser monitoring module, construct a functional relationship between the electrical signal intensity and the optical power established by the laser generator and the laser monitoring module; when an object to be processed is set in the light emitting direction of the laser monitoring module, construct a functional relationship between a threshold electrical signal and the optical power established by the laser generator, the laser monitoring module, and the object to be processed based on the functional relationship between the electrical signal intensity and the optical power established by the laser generator and the laser monitoring module and the return light residual coefficient of the object to be processed, so as to obtain a threshold electrical signal corresponding to the first superimposed laser; and control the laser generator to remain in an on state or enter an off state according to a comparison result of the real-time electrical signal of the first superimposed laser and the threshold electrical signal of the first superimposed laser; The laser monitoring module includes: An optical fiber body; the optical fiber body includes a core layer and a cladding layer, the cladding layer being arranged on the periphery of the core layer; at least a portion of the cladding layer is stripped to form a stripping opening, and when the first laser light or the first superimposed laser light is transmitted through the optical fiber body, cladding light of the first laser light or the first superimposed laser light transmitted through the cladding layer overflows from the stripping opening to form first overflow light; and A photoelectric sensor is electrically connected to the processor; it is used to receive the overflow light and convert the optical signal of the first overflow light into the real-time electrical signal, and the intensity of the real-time electrical signal is used to represent the size of the optical power of the first superimposed laser.

2. The laser with return light monitoring function according to claim 1, characterized in that: The depth of the stripping opening is smaller than the thickness of the cladding layer.

3. The laser with return light monitoring function according to claim 2, characterized in that: The optical fiber body comprises a light incident section, a light leakage section, and a light output section connected in sequence; at least a portion of the cladding of the light leakage section is stripped to form the stripping opening; The laser monitoring module also includes a heat sink; including a heat sink shell, the heat sink shell encloses a first channel, a accommodating space, and a second channel that are connected in sequence; the heat sink shell is provided with an opening, the opening is connected to the accommodating space, and the photoelectric sensor is arranged at the opening; the heat sink shell is used to encapsulate the optical fiber body; when the optical fiber body is encapsulated in the heat sink shell, the light leakage section is located in the accommodating space, the light incident section extends from the first channel to the outside of the heat sink shell, and the light exit section extends from the second channel to the outside of the heat sink shell.

4. The laser with return light monitoring function according to claim 3, characterized in that: The heat sink housing includes a first housing and a second housing; The first shell includes a first side wall and a second side wall arranged opposite to each other, and the first side wall is provided with a first groove, a first sink, and a second groove that are connected in sequence; The second shell includes a third side wall and a fourth side wall arranged in opposite directions, and the third side wall is provided with a third groove, a second sink groove, and a fourth groove connected in sequence; The opening is provided in the first shell, one end of the opening is communicated with the first sink, and the other end of the opening is communicated with the second side wall; When the first shell and the second shell are arranged in a manner that the first side wall and the second side wall are in contact with each other, the first groove and the third groove form the first channel, the first sinking groove and the second sinking groove form the accommodating space, and the second groove and the fourth groove form the second channel.

5. The laser with return light monitoring function according to any one of claims 1 to 4, characterized in that: The functional relationship between the electrical signal intensity and the optical power established between the laser generator and the laser monitoring module corresponds to a first functional relationship. The first functional relationship is: V=k i *P+b i , i=1,2,3…N, N is a positive integer; Where P is the optical power in watts; V is the electrical signal strength in millivolts; N represents the optical power interval [0, P max ] is divided into N sub-optical power intervals, P max is the rated optical power of the laser transmitter; i represents the i-th sub-optical power interval in the N sub-optical power intervals, k i b is the slope of the linear function formed by fitting the optical power in the i-th sub-optical power interval and the corresponding electrical signal intensity; i is the intercept of a linear function formed by fitting the optical power in the i-th sub-optical power interval to the corresponding electrical signal intensity.

6. The laser with return light monitoring function according to claim 5, characterized in that: The optical power range of the laser generator is [0, P max ] includes N sub-optical power intervals formed by sequential division, the i-th sub-optical power interval is [Pi-1, Pi], i = 1, 2, 3, ... N, N is a positive integer; P0 = 0, P N＝ P max The laser generator is configured to emit N lasers; the optical power of the i-th laser emitted is P i ; When no object to be processed or a light absorbing object is set in the light output direction of the laser monitoring module, the optical fiber body is used to receive and transmit the i-th laser; when the i-th laser is transmitted through the optical fiber body, the cladding light of the i-th laser transmitted through the cladding overflows from the stripping port to form the i-th overflow light; the photoelectric sensor receives the i-th overflow light and converts the optical signal of the i-th overflow light into the i-th electrical signal, and the intensity of the i-th electrical signal is Vi; The processor is configured to: control the laser generator to emit the i-th laser; And after obtaining the electrical signal corresponding to the i-th laser, emitting the i+1-th laser; obtaining and storing the electrical signal Vi corresponding to the i-th laser; the processor is further configured to: perform linear fitting on the optical power of the i-th laser and the electrical signal intensity (Pi, Vi) corresponding to the i-th laser, and the optical power of the i+1-th laser and the electrical signal intensity (Pi+1, Vi+1) corresponding to the i+1-th laser, to obtain the functional relationship of the electrical signal intensity corresponding to the i-th sub-optical power interval [Pi-1, Pi] with respect to the optical power, i=1,2,3,…N, N is a positive integer, thereby obtaining the first functional relationship.

7. The laser with return light monitoring function according to claim 6, characterized in that: The functional relationship between the threshold electrical signal and the optical power established based on the laser generator, the laser monitoring module, and the object to be processed corresponds to a second functional relationship, and the second functional relationship is: V′=(k i *P+b i )*(1+Δ), i=1, 2, 3…N, where N is a positive integer; Wherein, P is the optical power in watts; Δ is the return light margin coefficient of the object to be processed; V′ is the intensity of the threshold electrical signal; N represents the optical power interval [0, P max ] is divided into N sub-optical power intervals, P max is the rated optical power of the laser transmitter; i represents the i-th sub-optical power interval in the N sub-optical power intervals, k i b is the slope of the linear function formed by fitting the optical power in the i-th sub-optical power interval and the corresponding electrical signal intensity; i is the intercept of a linear function formed by fitting the optical power in the i-th sub-optical power interval to the corresponding electrical signal intensity.

8. The laser with return light monitoring function according to claim 7, characterized in that: The return light margin coefficient is 5%-20%.

9. The laser with return light monitoring function according to any one of claims 1 to 4, characterized in that: The processor is configured to: comparing the intensity of the real-time electrical signal of the first superimposed laser light with the intensity of the threshold electrical signal of the first superimposed laser light; If the intensity of the real-time electrical signal of the first superimposed laser is less than the intensity of the threshold electrical signal of the first superimposed laser, controlling the laser generator to remain in an on state; If the intensity of the real-time electrical signal of the first superimposed laser is equal to or greater than the intensity of the threshold electrical signal of the first superimposed laser, the laser generator is controlled to enter an off state.

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