CN113675708A - Industrial ultrashort pulse laser - Google Patents
Industrial ultrashort pulse laser Download PDFInfo
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- CN113675708A CN113675708A CN202110954864.7A CN202110954864A CN113675708A CN 113675708 A CN113675708 A CN 113675708A CN 202110954864 A CN202110954864 A CN 202110954864A CN 113675708 A CN113675708 A CN 113675708A
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- laser
- power amplification
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- control module
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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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0407—Liquid cooling, e.g. by water
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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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
-
- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0405—Conductive cooling, e.g. by heat sinks or thermo-electric elements
Abstract
The invention discloses an industrial ultrashort pulse laser, which belongs to the technical field of industrial lasers and comprises a seed laser and power amplification unit, wherein the seed laser and power amplification unit is integrally connected with an electronic and control unit through a cooling unit, the seed laser and power amplification unit is arranged at the top of the cooling unit, and the seed laser and power amplification unit is used for generating laser and amplifying power. In the invention, two systems are effectively cooled by using a novel cooling design, the pressure of cooling water can be quickly adjusted through a cooling unit, so that various types of refrigerators can be used together with a laser, meanwhile, the pressure of the cooling water can be adjusted through a control pump, and then, the optical system can be limited and supported through the compacted line of the cooling water, a water regulator is used in the design of a cooling hose to adjust the water pressure entering a laser cooling water tank, and the laser shell is deformed to micro-correct the alignment of the laser due to the water pressures of different levels.
Description
Technical Field
The invention belongs to the technical field of industrial lasers, and particularly relates to an industrial ultrashort pulse laser.
Background
Ultrashort pulse lasers play an increasingly important role in the field of high-precision manufacturing and processing. Despite the availability of many commercial ultrashort pulse laser suppliers on the market, their use in manufacturing is still in an early, rapid-growing stage. The industrial ultrashort pulse lasers currently on the market have many functions that need to be improved.
The industrial ultrashort pulse laser consists of an optical system and an electrical system. Today, most industrial ultrashort pulse lasers divide the optical and electrical systems into two distinct units. The optical system is usually assembled inside the laser head, while the electrical system is located in a separate housing, the two systems being connected by cables. The separation of the two systems not only increases the size and weight of the whole laser unit, causing a lot of inconvenience to the laser machine system, but also the ultrashort pulse laser needs to be synchronized with other systems (e.g. motion control system) and minimum time jitter as a core part of the mechanical system. For large mechanical systems consisting of many devices, the global synchronization method is most advantageous. Nowadays, most of the global synchronization is performed by using serial communication, ethernet protocol or point-to-point direct connection, these methods either have large time jitter or are difficult to integrate into the global synchronization system, the repetition rate of many ultrashort pulse lasers in the market is limited, the repetition rate usually cannot reach low frequency or direct current, for some applications, the repetition rate is required to be in the range of DC to MHz, most of the industrial ultrashort pulse laser systems need a cooler of a specific type to provide cooling water for the laser, which is mainly due to the requirement of cooling water pressure, and the use requirement is often not well met.
Disclosure of Invention
The invention aims to: the industrial ultrashort pulse laser is provided for solving the problems that the repetition rate of many ultrashort pulse lasers on the market is limited, the repetition rate cannot reach low frequency or direct current generally, for some applications, the repetition rate is required to be in a range from DC to MHz, most industrial ultrashort pulse laser systems need a cooler of a specific model to provide cooling water for the lasers, and the problem that the use requirement cannot be well met mainly due to the requirement of the cooling water pressure is solved.
In order to achieve the purpose, the invention adopts the following technical scheme:
an industrial ultrashort pulse laser comprises a seed laser and power amplification unit, wherein the seed laser and power amplification unit is integrally connected with an electronic and control unit through a cooling unit, the seed laser and power amplification unit is arranged at the top of the cooling unit, the seed laser and power amplification unit is used for generating laser and amplifying power, the electronic and control unit is arranged at the bottom of the cooling unit, the electronic and control unit controls the monitoring and control of laser power, and the cooling unit is used for carrying out synchronous water-cooling circulating cooling on the seed laser and power amplification unit and the electronic and control unit which are integrated on two sides;
the seed laser and power amplification unit comprises a seed laser module, the output end of the seed laser module is connected with a pulse selection module, the output end of the pulse selection module is connected with a primary power amplification system, the output end of the primary power amplification system is electrically connected with a secondary power amplification system, the output end of the secondary power amplification system is electrically connected with a tertiary power amplification system, and the output end of the tertiary power amplification system is connected with a laser output module.
As a further description of the above technical solution:
the electronic and control unit comprises a seed laser control module, the seed laser control module is electrically connected with the seed laser module, the seed laser control module is also connected with a pulse selection control module, the output end of the pulse selection control module is electrically connected with the input end of the pulse selection module, the output end of the pulse selection control module is connected with a laser diode starting module, the output end of the laser diode starting module is electrically connected with a temperature control module, the output end of the temperature control module is electrically connected with a radio frequency control module, the output end of the radio frequency control module is electrically connected with an external communication and control module, the output end of the laser diode starting module is electrically connected with the input end of a primary power amplification system, the output end of the radio frequency control module is electrically connected with the input ends of the primary power amplification system, a secondary power amplification system and a tertiary power amplification system, the output ends of the temperature control module and the radio frequency control module are connected with the laser output end, and the external communication and control module is connected with the external control end.
As a further description of the above technical solution:
the seed laser module comprises an SFP pluggable optical fiber transceiver and is used for realizing equipment synchronization of a global system.
As a further description of the above technical solution:
the electronic and control unit is controlled by an FPGA chip, the FPGA chip provides a logic and trigger signal control system for the RF driver, and the FPGA chip runs with a 100MHz clock.
As a further description of the above technical solution:
the cooling unit comprises a heat absorption box filled with cooling water liquid, a plurality of heat dissipation fins are fixedly connected to two sides of the heat absorption box, communicating pipes are arranged on two sides of the top of the heat absorption box and are communicated with the control pump through communicating outer pipes, and two sides of the heat absorption box are attached to the seed laser and power amplification unit and the electronic and control unit at corresponding positions respectively.
As a further description of the above technical solution:
the radiating fins are aluminum heat conducting fins, and the outer side walls of the radiating fins are plated with anti-corrosion zinc layers.
As a further description of the above technical solution:
the electrical system of the electronic and control unit comprises diodes, RF, IO and communication ports, and the IO ports comprise digital IO, analog IO, GigE network and RS232 ports.
As a further description of the above technical solution:
and the RS232 port is used for connecting communication software controlled by an external user program with the server.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. in the invention, through the designed industrial ultrashort pulse laser, the integrated design reduces optical and electronic systems to the maximum extent, and integrates the two systems into an integrated unit, the two systems are effectively cooled by using a novel cooling design, the pressure of cooling water can be quickly adjusted through a cooling unit, so that various types of refrigerating machines can be used together with the laser, meanwhile, the pressure of the cooling water can be adjusted through a control pump, then, the optical system can be limited and supported through the pressure line of the cooling water, a water regulator is used for adjusting the water pressure entering a laser cooling water tank in the design of a cooling hose, and the laser shell can be deformed to micro-correct the alignment of the laser due to the water pressures of different levels.
2. In the invention, the SFP small pluggable optical transceiver is provided through the designed laser and power amplification unit, can be synchronous with equipment in a complex global system, and the laser system can generate laser pulses with the repetition frequency from DC to 1MHz and can correctly process user-defined trigger signals of any random time sequence in the range.
3. According to the invention, through the designed control pump, the seed laser module is purposefully refrigerated and radiated after the low-pressure refrigerator is communicated with the control pump, and then the flow of other high-pressure refrigerators is regulated by using the water pressure regulator of the control pump so as to meet the pressure requirement.
Drawings
FIG. 1 is a system block diagram of an industrial ultrashort pulse laser according to the present invention;
FIG. 2 is a system diagram of an industrial ultrashort pulse laser according to the present invention;
fig. 3 is a schematic perspective view of a cooling unit of an industrial ultrashort pulse laser according to the present invention;
fig. 4 is a schematic structural diagram of a cooling unit of an industrial ultrashort pulse laser according to the present invention.
Illustration of the drawings:
1. a seed laser and power amplification unit; 101. a seed laser module; 102. a pulse selection module; 103. a primary power amplification system; 104. a secondary power amplification system; 105. a three-stage power amplification system; 106. a laser output module; 2. a cooling unit; 201. a heat absorption box; 202. a communicating pipe; 203. heat dissipation fins; 204. the outer pipe is communicated; 205. controlling the pump; 3. an electronic and control unit; 301. a seed laser control module; 302. a pulse selection control module; 303. a laser diode start module; 304. a temperature control module; 305. a radio frequency control module; 306. and an external communication and control module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: an industrial ultrashort pulse laser comprises a seed laser and power amplification unit 1, wherein the seed laser and power amplification unit 1 is integrally connected with an electronic and control unit 3 through a cooling unit 2, the seed laser and power amplification unit 1 is arranged at the top of the cooling unit 2, the seed laser and power amplification unit 1 is used for generating laser and amplifying power, the electronic and control unit 3 is arranged at the bottom of the cooling unit 2, the electronic and control unit 3 controls monitoring and controlling of laser power, and the cooling unit 2 is used for carrying out synchronous water cooling circulation cooling on the seed laser and power amplification unit 1 and the electronic and control unit 3 which are integrated on two sides;
the seed laser and power amplification unit 1 comprises a seed laser module 101, the output end of the seed laser module 101 is connected with a pulse selection module 102, the output end of the pulse selection module 102 is connected with a primary power amplification system 103, the output end of the primary power amplification system 103 is electrically connected with a secondary power amplification system 104, the output end of the secondary power amplification system 104 is electrically connected with a tertiary power amplification system 105, the output end of the tertiary power amplification system 105 is connected with a laser output module 106, the seed laser module 101 comprises an SFP pluggable optical fiber transceiver for realizing the equipment synchronization of the overall system, the electronic and control unit 3 is controlled by an FPGA chip, the FPGA chip provides a control system of logic and trigger signals for an RF driver, and the FPGA chip runs by a 100MHz clock.
The implementation mode is specifically as follows: through the minimized design of the electrical system and the optical system, one PCB bears all electrical functions, the PCB is compact in design, integrates the optical system and the electrical system, is designed with a diode driver circuit, occupies small area, is high in stability, is designed with an efficient cooling system, and is provided with the optical system at the top. The bottom is the electrical system. The middle layer is a cooling water path, the SFP gigabit transceiver is used for global synchronization and cooling water pressure regulation among systems, the cooling water pressure regulation is used for providing fixed cooling water pressure, the ARM processor is used for running control software, a laser user controls the laser system by using RS232, the Ethernet is used for firmware upgrade, and the RS232 server is developed as communication software for external user program control through all software control functions of the ARM processor.
The electronic and control unit 3 comprises a seed laser control module 301, the seed laser control module 301 is electrically connected with a seed laser module 101, the seed laser control module 301 is further connected with a pulse selection control module 302, the pulse selection control module 302 outputs and selects an input end of the pulse selection module 102, the pulse selection control module 302 outputs are connected with a laser diode starting module 303, the laser diode starting module 303 outputs are electrically connected with a temperature control module 304, the temperature control module 304 outputs are electrically connected with a radio frequency control module 305, the radio frequency control module 305 outputs are electrically connected with an external communication and control module 306, the laser diode starting module 303 outputs are electrically connected with an input end of a primary power amplification system 103, the radio frequency control module 305 outputs are electrically connected with the primary power amplification system 103, the seed laser control module 301 is electrically connected with the seed laser module 101, and the pulse selection control module 301 outputs are electrically connected with the seed laser diode starting module 303, The input ends of the secondary power amplification system 104 and the tertiary power amplification system 105 are electrically connected, the output ends of the temperature control module 304 and the radio frequency control module 305 are connected with the laser output end, the external communication and control module 306 is connected with the external control end, the cooling unit 2 comprises a heat absorption box 201 filled with cooling water liquid, a plurality of heat dissipation fins 203 are fixedly connected to two sides of the heat absorption box 201, communicating pipes 202 are arranged on two sides of the top of the heat absorption box 201, the communicating pipes 202 are communicated with the control pump 205 through communicating outer pipes 204, and two sides of the heat absorption box 201 are respectively attached to the seed laser and power amplification unit 1 and the electronic and control unit 3 at corresponding positions.
The implementation mode is specifically as follows: the optical path is a compact multi-stage optical amplifier that is carefully designed and simulated, all optical components are positioned by precise positioning control, a cooling unit 2 is run under the optical chamber in order to cool the optical components such as diodes, ensure the proper heat dissipation of the optical components by the cooling water system, use an external cooler to drive the cooling water system, and maintain the temperature within +/-0.5C of the set temperature range.
The working principle is as follows: during use, after the seed laser control module 301 controls the seed laser control module 301 to produce laser, the pulse selection control module 302 controls the pulse selection module 102 to select laser pulse frequency, the laser diode starting module 303 starts the primary power amplification system 103 to amplify power, the radio frequency control module 305 controls the secondary power amplification system 104 and the tertiary power amplification system 105 to control power amplification frequency, and the temperature control module 304 judges the overall temperature of the seed laser module 101, the subsequent power amplification systems and the laser output module 106, so that the heat dissipation treatment of high-pressure and low-pressure infusion is realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. An industrial ultrashort pulse laser comprises a seed laser and power amplification unit (1), and is characterized in that the seed laser and power amplification unit (1) is integrally connected with an electronic and control unit (3) through a cooling unit (2), the seed laser and power amplification unit (1) is arranged at the top of the cooling unit (2), the seed laser and power amplification unit (1) is used for generating laser and amplifying power, the electronic and control unit (3) is arranged at the bottom of the cooling unit (2), the electronic and control unit (3) controls monitoring and controlling of laser power, and the cooling unit (2) is used for performing synchronous water-cooling circulation cooling on the seed laser and power amplification unit (1) and the electronic and control unit (3) which are integrated on two sides;
seed laser and power amplification unit (1) includes seed laser module (101), seed laser module (101) output is connected with pulse selection module (102), pulse selection module (102) output is connected with one-level power amplification system (103), one-level power amplification system (103) output electric connection has second grade power amplification system (104), second grade power amplification system (104) output electric connection has tertiary power amplification system (105), tertiary power amplification system (105) output is connected with laser output module (106).
2. The ultra-short pulse laser as claimed in claim 1, wherein the electronic and control unit (3) comprises a seed laser control module (301), the seed laser control module (301) is electrically connected to the seed laser module (101), the seed laser control module (301) is further connected to a pulse selection control module (302), the pulse selection control module (302) is electrically connected to the pulse selection module (102) at the output end, the laser diode start module (303) is connected to the output end of the pulse selection control module (302), the temperature control module (304) is electrically connected to the output end of the laser diode start module (303), the radio frequency control module (305) is electrically connected to the output end of the temperature control module (304), the external communication and control module (306) is electrically connected to the output end of the radio frequency control module (305), the laser diode starting control system is characterized in that the output end of the laser diode starting module (303) is electrically connected with the input end of the primary power amplification system (103), the output end of the radio frequency control module (305) is electrically connected with the input ends of the primary power amplification system (103), the secondary power amplification system (104) and the tertiary power amplification system (105), the output ends of the temperature control module (304) and the radio frequency control module (305) are connected with the laser output end, and the external communication and control module (306) is connected with the external control end.
3. The industrial ultrashort pulse laser of claim 1, wherein the seed laser module (101) comprises an SFP pluggable fiber transceiver for device synchronization of a global system.
4. The industrial ultrashort pulse laser as claimed in claim 1, wherein the electronic and control unit (3) is controlled by an FPGA chip, the FPGA chip providing a control system of logic and trigger signals for the RF driver, and the FPGA chip running at 100MHz clock.
5. The industrial ultrashort pulse laser as recited in claim 1, wherein the cooling unit (2) comprises a heat absorption box (201) filled with cooling water, both sides of the heat absorption box (201) are fixedly connected with a plurality of heat dissipation fins (203), both sides of the top of the heat absorption box (201) are provided with a communication pipe (202), the communication pipe (202) is communicated with the control pump (205) through a communication outer pipe (204), and both sides of the heat absorption box (201) are respectively attached to the seed laser and power amplification unit (1) and the electronic and control unit (3) at corresponding positions.
6. The industrial ultrashort pulse laser as claimed in claim 5, wherein the heat sink fin (203) is a heat conducting plate made of aluminum, and the outer sidewall of the heat sink fin (203) is plated with a corrosion-proof zinc layer.
7. An industrial ultrashort pulse laser as claimed in claim 1 wherein the electrical system of the electronic and control unit (3) comprises diode, RF, IO and communication ports and the IO ports comprise digital IO, analog IO, GigE network and RS232 port.
8. The industrial ultrashort pulse laser as claimed in claim 7, wherein the RS232 port is used for connecting an external user program controlled communication software with a server.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110954864.7A CN113675708A (en) | 2021-08-19 | 2021-08-19 | Industrial ultrashort pulse laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110954864.7A CN113675708A (en) | 2021-08-19 | 2021-08-19 | Industrial ultrashort pulse laser |
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| CN113675708A true CN113675708A (en) | 2021-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110954864.7A Pending CN113675708A (en) | 2021-08-19 | 2021-08-19 | Industrial ultrashort pulse laser |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090213879A1 (en) * | 2006-01-23 | 2009-08-27 | Stadler Andrew D | Automated Laser Tuning |
| JP2012254478A (en) * | 2011-06-10 | 2012-12-27 | Miyachi Technos Corp | Laser machining device and mopa system fiber laser oscillator |
| US20150110136A1 (en) * | 2012-06-12 | 2015-04-23 | Braunleinsberg 10 | Movable Modular Housing for a Short Pulse Laser with Integrated Amplifier |
| US20150180197A1 (en) * | 2012-06-12 | 2015-06-25 | Photon Energy Gmbh | Short Pulse Laser With Amplifier And Adjustable Pulse Sequence |
| CN204464750U (en) * | 2015-03-24 | 2015-07-08 | 山西暗睛光电科技有限公司 | A kind of surface treatment laser |
| US20180261967A1 (en) * | 2015-11-25 | 2018-09-13 | Raytheon Company | Dual-function optical bench and cooling manifold for high-power laser system |
-
2021
- 2021-08-19 CN CN202110954864.7A patent/CN113675708A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090213879A1 (en) * | 2006-01-23 | 2009-08-27 | Stadler Andrew D | Automated Laser Tuning |
| JP2012254478A (en) * | 2011-06-10 | 2012-12-27 | Miyachi Technos Corp | Laser machining device and mopa system fiber laser oscillator |
| US20150110136A1 (en) * | 2012-06-12 | 2015-04-23 | Braunleinsberg 10 | Movable Modular Housing for a Short Pulse Laser with Integrated Amplifier |
| US20150180197A1 (en) * | 2012-06-12 | 2015-06-25 | Photon Energy Gmbh | Short Pulse Laser With Amplifier And Adjustable Pulse Sequence |
| CN204464750U (en) * | 2015-03-24 | 2015-07-08 | 山西暗睛光电科技有限公司 | A kind of surface treatment laser |
| US20180261967A1 (en) * | 2015-11-25 | 2018-09-13 | Raytheon Company | Dual-function optical bench and cooling manifold for high-power laser system |
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