CN111934194B - Laser device - Google Patents
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- CN111934194B CN111934194B CN202010627013.7A CN202010627013A CN111934194B CN 111934194 B CN111934194 B CN 111934194B CN 202010627013 A CN202010627013 A CN 202010627013A CN 111934194 B CN111934194 B CN 111934194B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/026—Monolithically integrated components, e.g. waveguides, monitoring photo-detectors, drivers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/06808—Stabilisation of laser output parameters by monitoring the electrical laser parameters, e.g. voltage or current
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- Semiconductor Lasers (AREA)
- Lasers (AREA)
Abstract
The embodiment of the invention relates to the technical field of laser design, and discloses a laser, which comprises: a pump light generating module, a laser output module, a light power detecting module and an alarm module, wherein the pump light generating module is used for outputting pump light, the input end of the laser output module is connected with the output end of the pump light generating module, used for outputting laser, the optical power detection module is arranged at one side of the output end and one side of the input end of the pump light generation module, used for detecting the output laser power and the return light power, the alarm module is connected with the light power detection module, the laser provided by the embodiment of the invention can detect the output laser of the laser and the return light returning to the laser, and when the power is too high, the laser is timely turned off or an early warning signal is sent out, so that the safety and the reliability of the laser are greatly improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of laser design, in particular to a laser.
Background
The semiconductor laser, also called laser diode, is a laser using semiconductor material as working substance, and it has small volume and long service life, and can be pumped by adopting simple current injection mode, and its working voltage and current are compatible with integrated circuit, so that the semiconductor laser can be monolithically integrated with integrated circuit. And may also be directly current modulated at frequencies up to GHz to obtain high speed modulated laser output. Among them, a Direct semiconductor Laser (DDL) has advantages of high photoelectric conversion efficiency, small volume, long service life, and the like, and is widely used in the fields of material processing, communication, sensing, and the like.
In implementing the embodiments of the present invention, the inventors found that at least the following problems exist in the above related art: at present, although a high-power direct semiconductor laser is widely applied to the fields of laser welding, material heat treatment, additive manufacturing and the like, the problem of light return of the semiconductor laser in material processing application is not effectively solved, compared with a continuous optical fiber laser, the diameter of an output optical fiber core of the semiconductor laser is larger, the power of returning laser entering a laser system in the material processing application is higher, and the laser reflected by a processing piece in the material processing of the semiconductor laser can not only cause the reduction of the output power of the semiconductor laser, but also influence the reliability of devices such as a pumping source, a beam combiner and the like, and even cause the failure of the semiconductor laser.
Disclosure of Invention
In view of the above-mentioned defects in the prior art, an object of the embodiments of the present invention is to provide a laser capable of detecting return light and having good reliability.
The purpose of the embodiment of the invention is realized by the following technical scheme:
in order to solve the above technical problem, an embodiment of the present invention provides a laser, including:
a pump light generation module for outputting pump light;
the input end of the laser output module is connected with the output end of the pump light generation module and is used for outputting laser;
the optical power detection module is arranged on one side of the output end and one side of the input end of the pump light generation module and is used for detecting the output laser power and the return light power;
and the alarm module is connected with the optical power detection module and used for outputting an early warning signal and/or turning off the laser when the ratio of the return optical power to the output laser power exceeds a preset value.
In some embodiments, the laser system further comprises:
and the indicating light generating module is used for outputting an indicating light source, and the output end of the indicating light generating module is connected with the input end of the pumping light generating module.
In some embodiments, the optical power detection module comprises:
the reverse light photoelectric detection module is arranged on one side of the input end of the indication light generation module and used for receiving and detecting return light;
and the forward light photoelectric detection module is arranged on one side of the output end of the pumping light generation module and is used for detecting the output laser.
In some embodiments, the forward light photodetection module comprises:
the mold stripper packaging heat sink comprises a forward photoelectric detector mounting hole and a mold stripper packaging glass tube mounting hole which are communicated, wherein the inner surface of the forward photoelectric detector mounting hole is an inclined plane with a certain angle, and one side of the photoelectric detector mounting hole, which is close to the mold stripper packaging glass tube mounting hole, is a wide opening;
the forward photoelectric detector is fixed in the forward photoelectric detector mounting hole;
and the mold stripper packaging glass tube is embedded in the mold stripper packaging glass tube mounting hole, and the output end optical fiber of the pump light generation module is sleeved in the mold stripper packaging glass tube.
In some embodiments, the stripper package heat sink is a high thermal conductivity aluminum alloy material,
the forward light photoelectric detection module further comprises: and the thermistor is attached to the outer surface of the mold stripper packaging heat sink.
In some embodiments, the reverse light photodetection module comprises:
an optical fiber fixing block;
the return light collecting optical fiber is fixed on the optical fiber fixing block through optical fiber fixing glue, and one end of the return light collecting optical fiber is connected with the input end of the indicating light generating module and used for receiving and receiving return light;
a reverse photodetector;
the return light collecting and reflecting shell is a spherical cavity, a first round hole and a second round hole are formed in two sides of the cavity, the diameter of the first round hole is larger than that of the second round hole, the first round hole is used for aligning the reverse photoelectric detector, and the second round hole is used for accommodating the other end of the return light collecting optical fiber.
In some embodiments, the reverse light photodetection module further comprises:
the reverse photoelectric detector is fixedly arranged on the reverse photoelectric detector mounting fixing block;
the reverse photoelectric detector mounting fixing block is fixed on the rotating stand column, and the rotating stand column can rotate automatically along the central shaft to adjust the alignment angle of the reverse photoelectric detector and the first round hole.
In some embodiments, the pump light generation module comprises:
at least one semiconductor pump source for outputting pump light;
and the pump light synthesizer comprises at least two input ends, one input end of the pump light synthesizer is connected with the output end of the indicating light generation module, and the other input end of the pump light synthesizer is connected with the output end of the at least one semiconductor pump source.
In some embodiments, the indication light generation module comprises:
the indicating red laser is used for outputting a red indicating light source;
at least one semiconductor pump source for outputting pump light;
and the red light coupling beam combiner comprises at least three input ends, one input end of the red light coupling beam combiner is connected with the output end of the indication red laser, one input end of the red light coupling beam combiner is connected with the optical power detection module, and the other input end of the red light coupling beam combiner is connected with the output end of the at least one semiconductor pumping source.
In some embodiments, the laser output module comprises:
one end of the transmission optical fiber is connected with the output end of the pump light generation module;
and the input end of the laser output head is connected with the other end of the transmission optical fiber, and the output end of the laser output head is used for outputting laser.
Compared with the prior art, the invention has the beneficial effects that: in contrast to the state of the art, an embodiment of the present invention provides a laser including: a pump light generating module, a laser output module, a light power detecting module and an alarm module, wherein the pump light generating module is used for outputting pump light, the input end of the laser output module is connected with the output end of the pump light generating module, used for outputting laser, the optical power detection module is arranged at one side of the output end and one side of the input end of the pump light generation module, used for detecting the output laser power and the return light power, the alarm module is connected with the light power detection module, the laser provided by the embodiment of the invention can detect the output laser of the laser and the return light returning to the laser, and when the power is too high, the laser is timely turned off or an early warning signal is sent out, so that the safety and the reliability of the laser are greatly improved.
Drawings
One or more embodiments are illustrated by the accompanying figures in the drawings that correspond thereto and are not to be construed as limiting the embodiments, wherein elements/modules and steps having the same reference numerals are represented by like elements/modules and steps, unless otherwise specified, and the drawings are not to scale.
Fig. 1 is a schematic structural diagram of a laser provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a forward photoelectric detection module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an inverse photoelectric detection module according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a principle that a reverse photo-electric detection module deflects and attenuates return light according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be noted that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
At present, the application of a high-power semiconductor laser is severely restricted by the problem of light return of laser in material processing application, and the problem of light return is solved by optimizing the design of an output head of the laser, so that not only complicated light path simulation is needed, but also a complicated light return blocking structure is needed, and the problem of light return in the application of the laser is not solved effectively all the time.
In order to improve the stability of a semiconductor laser in material processing application, monitor the power of returned laser entering a laser system in real time and effectively solve the problem that the semiconductor laser fails due to overlarge return light power, the invention provides a laser, which comprises: the laser comprises a pump light generating module, a laser output module, an optical power detecting module and an alarm module, wherein the pump light generating module is used for outputting pump light, the input end of the laser output module is connected with the output end of the pump light generating module and is used for outputting laser, the optical power detecting module is arranged on one side of the output end and one side of the input end of the pump light generating module and is used for detecting the output laser power and the return light power, the alarm module is connected with the optical power detecting module and is used for outputting an early warning signal and/or turning off the laser when the ratio of the return light power to the output laser power exceeds a preset value, the laser provided by the embodiment of the invention can detect the output laser of the laser and the return light returning to the laser, and timely turns off the laser or sends out the early warning signal when the power is too large, so that the safety and the reliability of the laser are greatly improved, thereby avoiding the failure of the laser due to the overlarge power of the returned light.
Further, in some embodiments, the laser system further comprises: and the indicating light generating module is used for outputting an indicating light source, and the output end of the indicating light generating module is connected with the input end of the pumping light generating module.
Specifically, the embodiments of the present invention will be further explained below with reference to the drawings.
An embodiment of the present invention provides a laser, please refer to fig. 1, which shows a structure of a laser provided in an embodiment of the present invention, in the laser, the optical power detection module includes: a reverse photo-electric detection module 101 and a forward photo-electric detection module 106; the pump light generation module includes: at least one semiconductor pump source 102 and a pump light combiner 105; the indication light generation module comprises: the at least one semiconductor pump source 102, the indicator red laser 104 and the red light coupling beam combiner 103; the laser output module includes: a transmission fiber 107 and a laser output head 108. In addition, a return ray 109 of the laser input/return from the laser output head 108 and a processing plane 1010 are also shown in fig. 1.
The reverse light photoelectric detection module 101 is arranged on one side of the input end of the indication light generation module and is used for receiving and detecting return light; the forward light photoelectric detection module 106 is disposed at one side of the output end of the pump light generation module, and is configured to detect the output laser.
Specifically, when the reverse light photodetection module 101 and the forward light photodetection module 106 detect laser light, the detected voltage represents the laser power, and since the voltage and the power of the semiconductor laser are linearly related, the alarm module can calculate the actual return light power and output power of the semiconductor laser according to the detected voltage of the reverse light photodetection module 101 and the forward light photodetection module 106.
Furthermore, the alarm module can control the early warning and the operation of the laser according to the ratio of the return light power to the output laser power. Specifically, when the ratio of the return light power to the output laser power is less than 2%, the semiconductor laser operates normally; when the ratio of the return light power to the output laser power is within the range of 2% -5%, the semiconductor laser gives a warning in a staged manner; when the ratio of the return light power to the output laser power is greater than 5%, the semiconductor laser is turned off to be cooled, and the problem that the semiconductor laser is burnt due to overlarge return light power can be effectively solved through the control of the alarm module.
The at least one semiconductor pump source 102 is used for outputting pump light; the pump light combiner 105 includes at least two input ends, one input end of the pump light combiner 105 is connected to the output end of the indication light generation module, and the other input end of the pump light combiner 105 is connected to the output end of the at least one semiconductor pump source 105.
Preferably, in the embodiment of the present invention, the number of the semiconductor pump sources 102 is 3-6, and the output power of the semiconductor pump sources 102 is 200W-500W.
The indication red laser 104 is used for outputting a red light indication light source; the red light coupling beam combiner 103 comprises at least three input ends, one input end of the red light coupling beam combiner 103 is connected with the output end of the indication red laser 104, one input end of the red light coupling beam combiner 103 is connected with the optical power detection module, and the other input end of the red light coupling beam combiner 103 is connected with the output end of the at least one semiconductor pump source 102.
Preferably, in the embodiment of the present invention, the red light coupling beam combiner 103 is an N × 1 beam combiner, where N is a positive integer greater than or equal to 3.
One end of the transmission fiber 107 is connected with the output end of the pump light generation module; the input end of the laser output head 108 is connected with the other end of the transmission fiber 107, and the output end of the laser output head 108 is used for outputting laser.
In this embodiment of the present invention, an input end of the red light coupling beam combiner 103 is an input end of the indication light generation module, an output end of the red light coupling beam combiner 103 is an output end of the indication light generation module, an input end of the pump light combiner 105 is an input end of the pump light generation module, an output end of the pump light combiner 105 is an output end of the pump light generation module, one end of the transmission fiber 107 is an input end of the laser output module, and an output end of the laser output head 108 is an output end of the laser output module.
When the laser described in the embodiment of the present invention works, the red light generated by the red light laser 104 and the pump light generated by the semiconductor pump source 102 enter the system through the red light coupling beam combiner 103 and the pump light combiner 105, and then are combined and emitted through the transmission fiber 107 and the laser output head 108, the emitted laser acts on the processing plane 1010, the output power of the laser can be detected through the forward photoelectric detection module 106 disposed at the input end of the laser output module, in addition, part of the laser emitted to the processing plane 1010 will be reflected, a small part of the laser will be returned to the system from the laser output head 108, the return light passes through the laser output head 108, the transmission fiber 107, the pump light combiner 105 and the red light coupling beam combiner 103, the power of the return light is detected through the backward photoelectric detection module 101, the alarm module detects the return light power and the output power of the system through the backward photoelectric detection module 101 and the forward photoelectric detection module 106, and when the ratio of the two powers exceeds a preset range, the laser is closed or an early warning signal is output. The early warning signal can be a sound, a character, an image and other signals carrying early warning information or warning.
The laser provided by the embodiment of the invention adopts an all-fiber return light collection mode, has high discrimination between return light and forward light, can effectively avoid the interference of normal forward light on collecting reverse return light energy, is favorable for improving the overall alarm reliability and sensitivity and avoids false alarm. Meanwhile, the alarm module can detect the power of the return light in real time in processing application, and can remind and warn when the power exceeds a preset value, so that the use safety of the laser is protected, the laser is prevented from being damaged due to non-standard use, and further, the normal use is not influenced as much as possible while the laser is protected by setting a gradient alarm strategy.
Further, in an embodiment of the present invention, please refer to fig. 2, which shows a structure of a forward photoelectric detection module provided in an embodiment of the present invention, where the forward photoelectric detection module 106 includes: a forward photodetector 202, a thermistor 203, a stripper packaged glass tube 204, and a stripper packaged heat sink 206.
The mold stripper packaging heat sink 206 comprises a forward photoelectric detector mounting hole 201 and a mold stripper packaging glass tube mounting hole 205 which are communicated, the inner surface of the forward photoelectric detector mounting hole 201 is an inclined plane with a certain angle, the photoelectric detector mounting hole 201 is close to one side of the mold stripper packaging glass tube mounting hole 205 is a wide opening, and more lasers can enter the forward photoelectric detector 202 conveniently. The stripper package heat sink 206 is an aluminum alloy material with high thermal conductivity. The thermistor 203 is attached to the outer surface of the mold stripper package heat sink 206, preferably to the upper side or side of the mold stripper package heat sink 206. The forward photodetector 202 is fixed in the forward photodetector mounting hole 201, and the forward photodetector 202 has high sensitivity. The mold stripper encapsulation glass tube 204 is embedded in the mold stripper encapsulation glass tube mounting hole 205, the mold stripper encapsulation glass tube 204 has better heat resistance, the mold stripper encapsulation glass tube 204 is used for protecting the output optical fiber of the pump light combiner 105 and the optical fiber fusion point between the transmission optical fibers 107, so that the fragile fusion point is prevented from being damaged, meanwhile, the leakage light can be ensured to be led out in time, and the optical fiber is prevented from being burnt out.
When the laser system operates, laser enters the mold stripping device packaging heat sink 206 through the mold stripping device packaging glass tube 204, a small part of light is emitted onto the forward photoelectric detector 202 through the forward photoelectric detector mounting hole 201, the forward photoelectric detector 202 sends a real-time detection voltage value to the alarm module, and the alarm module can obtain the actual output power of the semiconductor laser according to the real-time detection voltage value because the laser power and the real-time detection voltage value are in a linear relation.
The forward photoelectric detection module provided by the embodiment of the invention can monitor the output power of the laser, can alarm that the laser has current input and no laser output abnormality, and can timely close the laser when the semiconductor laser suddenly has no laser output in the operation process, thereby playing a role in protecting the light path.
Further, in an embodiment of the present invention, please refer to fig. 3, which shows a structure of an inverse photoelectric detection module provided in an embodiment of the present invention, where the inverse photoelectric detection module 101 includes: a reverse photodetector 303, a return light collection reflection housing 304, a fiber fixing block 305, and a return light collection fiber 306.
The return light collecting optical fiber 306 is fixed on the optical fiber fixing block 305 through optical fiber fixing glue 307, and one end of the return light collecting optical fiber 306 is connected with the input end of the indication light generating module and is used for receiving and recovering return light; the return light collecting and reflecting shell 304 is a spherical cavity, a first round hole and a second round hole are arranged on two sides of the cavity, the diameter of the first round hole is larger than that of the second round hole, the first round hole is used for aligning the reverse photoelectric detector 303, and the second round hole is used for accommodating the other end of the return light collecting optical fiber 306.
When the laser system operates, returning laser is output from the input end of the red light coupling beam combiner 103, enters the returning light collecting reflection shell 304 through the returning light collecting optical fiber 306, returning light is incident on the reverse photoelectric detector 303, the reverse photoelectric detector 303 sends a voltage value detected in real time to the alarm module, and the alarm module can obtain actual power of the returning light of the semiconductor laser according to the voltage value detected in real time because the laser power and the voltage value detected in real time form a linear relationship.
Further, since the direct irradiation on the reverse photodetector 303 when the return light power is large may affect the lifetime of the reverse photodetector 303, in order to solve the problem, the reverse light photodetecting module further includes: a rotary upright 301 and a reverse photodetector mounting fixture block 302. The reverse photodetector 303 is fixed to the reverse photodetector mounting fixing block 302. The reverse photoelectric detector mounting fixing block 302 is fixed on the rotating upright column 301, and the rotating upright column 301 can rotate along a central shaft to adjust the alignment angle between the reverse photoelectric detector 303 and the first round hole.
Specifically, please refer to fig. 4, which illustrates a principle of the reverse photoelectric detection module deflecting and attenuating the return light, when the power of the return laser is weak, the rotating column 301 may be adjusted to make the reverse photoelectric detector 303 directly face the first circular hole, so that the return light 401 is perpendicularly incident to the detection plane 402 of the reverse photoelectric detector 303; when the power of the returned laser light is strong, the rotating column 301 may be adjusted to make the reverse photoelectric detector 303 not completely aligned with the first circular hole, so that a certain angle is formed between the returned light 401 and the detection plane 402 of the reverse photoelectric detector 303, and the receiving amount of the returned light by the reverse photoelectric detector 303 is reduced. It should be noted that the difference in the received amount of the returned light may cause the voltage value output by the backward photoelectric detector 303 to change, so that the early warning module needs to calculate the angle between the returned light 401 and the detection plane 402 of the backward photoelectric detector 303 when calculating the power of the returned light.
The reverse photoelectric detection module provided by the embodiment of the invention is provided with the rotating upright post, can adjust the angle of the detection plane of the return light and the detection reverse photoelectric detector, and controls the power value of the return light received by the reverse photoelectric detector, thereby effectively protecting the reverse photoelectric detector and conveniently setting the consistency of the voltage alarm preset value of the return light power.
An embodiment of the present invention provides a laser, including: a pump light generating module, a laser output module, a light power detecting module and an alarm module, wherein the pump light generating module is used for outputting pump light, the input end of the laser output module is connected with the output end of the pump light generating module, used for outputting laser, the optical power detection module is arranged at one side of the output end and one side of the input end of the pump light generation module, used for detecting the output laser power and the return light power, the alarm module is connected with the light power detection module, the laser provided by the embodiment of the invention can detect the output laser of the laser and the return light returning to the laser, and when the power is too high, the laser is timely turned off or an early warning signal is sent out, so that the safety and the reliability of the laser are greatly improved.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A laser, comprising:
a pump light generation module for outputting pump light;
the input end of the laser output module is connected with the output end of the pump light generation module and is used for outputting laser;
the optical power detection module is arranged on one side of the output end and one side of the input end of the pump light generation module and is used for detecting the output laser power and the return light power;
the alarm module is connected with the optical power detection module and used for outputting an early warning signal and/or turning off the laser when the ratio of the return optical power to the output laser power exceeds a preset value;
the indicating light generating module is used for outputting an indicating light source, and the output end of the indicating light generating module is connected with the input end of the pumping light generating module;
the optical power detection module includes:
the reverse light photoelectric detection module is arranged on one side of the input end of the indication light generation module and used for receiving and detecting return light;
and the forward light photoelectric detection module is arranged on one side of the output end of the pumping light generation module and is used for detecting the output laser.
2. The laser of claim 1, wherein the forward photo-electric detection module comprises:
the mold stripper packaging heat sink comprises a forward photoelectric detector mounting hole and a mold stripper packaging glass tube mounting hole which are communicated, wherein the inner surface of the forward photoelectric detector mounting hole is an inclined plane with a certain angle, and one side of the photoelectric detector mounting hole, which is close to the mold stripper packaging glass tube mounting hole, is a wide opening;
the forward photoelectric detector is fixed in the forward photoelectric detector mounting hole;
and the mold stripper packaging glass tube is embedded in the mold stripper packaging glass tube mounting hole, and the output end optical fiber of the pump light generation module is sleeved in the mold stripper packaging glass tube.
3. The laser of claim 2, wherein the stripper encapsulation heat sink is a high thermal conductivity aluminum alloy material,
the forward light photoelectric detection module further comprises: and the thermistor is attached to the outer surface of the mold stripper packaging heat sink.
4. The laser of claim 1, wherein the reverse photo-electric detection module comprises:
an optical fiber fixing block;
the return light collecting optical fiber is fixed on the optical fiber fixing block, and one end of the return light collecting optical fiber is connected with the input end of the indicating light generating module and used for receiving and recovering return light;
a reverse photodetector;
the return light collecting and reflecting shell is a spherical cavity, a first round hole and a second round hole are formed in two sides of the cavity, the diameter of the first round hole is larger than that of the second round hole, the first round hole is used for aligning the reverse photoelectric detector, and the second round hole is used for accommodating the other end of the return light collecting optical fiber.
5. The laser of claim 4, wherein the backward light photodetection module further comprises:
the reverse photoelectric detector is fixedly arranged on the reverse photoelectric detector mounting fixing block;
the reverse photoelectric detector mounting fixing block is fixed on the rotating stand column, and the rotating stand column can rotate automatically along the central shaft to adjust the alignment angle of the reverse photoelectric detector and the first round hole.
6. The laser according to any of claims 2-5, wherein the pump-light generating module comprises:
at least one semiconductor pump source for outputting pump light;
and the pump light synthesizer comprises at least two input ends, one input end of the pump light synthesizer is connected with the output end of the indicating light generation module, and the other input end of the pump light synthesizer is connected with the output end of the at least one semiconductor pump source.
7. The laser according to any of claims 2-5, wherein the indication light generation module comprises:
the indicating red laser is used for outputting a red indicating light source;
at least one semiconductor pump source for outputting pump light;
and the red light coupling beam combiner comprises at least three input ends, one input end of the red light coupling beam combiner is connected with the output end of the indication red laser, one input end of the red light coupling beam combiner is connected with the optical power detection module, and the other input end of the red light coupling beam combiner is connected with the output end of the at least one semiconductor pumping source.
8. The laser according to any one of claims 1-5, wherein the laser output module comprises:
one end of the transmission optical fiber is connected with the output end of the pump light generation module;
and the input end of the laser output head is connected with the other end of the transmission optical fiber, and the output end of the laser output head is used for outputting laser.
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| CN202010627013.7A CN111934194B (en) | 2020-07-01 | 2020-07-01 | Laser device |
| PCT/CN2020/141153 WO2022001061A1 (en) | 2020-07-01 | 2020-12-30 | Laser |
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| CN202010627013.7A CN111934194B (en) | 2020-07-01 | 2020-07-01 | Laser device |
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| CN111934194B true CN111934194B (en) | 2022-02-22 |
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| CN111934194B (en) * | 2020-07-01 | 2022-02-22 | 苏州创鑫激光科技有限公司 | Laser device |
| CN112798230B (en) * | 2020-12-29 | 2023-05-05 | 深圳市星汉激光科技股份有限公司 | Light path test system and method for return light resistance of semiconductor laser |
| CN112362313B (en) * | 2021-01-11 | 2021-04-23 | 深圳市星汉激光科技股份有限公司 | Light path testing system and method for return light resistance of laser chip |
| CN114284841B (en) * | 2021-12-29 | 2023-10-20 | 武汉锐科光纤激光技术股份有限公司 | Optical fiber laser and control method thereof |
| CN114374136A (en) * | 2022-01-06 | 2022-04-19 | 上海飞博激光科技有限公司 | Returned light monitoring device of pulse fiber laser |
| CN117433631B (en) * | 2023-12-20 | 2024-03-12 | 四川中久大光科技有限公司 | Optical fiber laser positive reflection calculation device, calculation method and application method |
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| WO2022001061A1 (en) | 2022-01-06 |
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