CN106654812A - High power optical fiber laser key point protection device - Google Patents
High power optical fiber laser key point protection device Download PDFInfo
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- CN106654812A CN106654812A CN201510732495.1A CN201510732495A CN106654812A CN 106654812 A CN106654812 A CN 106654812A CN 201510732495 A CN201510732495 A CN 201510732495A CN 106654812 A CN106654812 A CN 106654812A
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Abstract
A high power optical fiber laser key point protection device is disclosed and comprises an optical fiber (1), and the optical fiber has a melting point position (2). The high power optical fiber laser key point protection device is characterized in that the optical fiber (1) centered around the melting point position (2) is uniformly wrapped with heat conduction and light guiding glue (4), and the optical fiber (1) wrapped with the heat conduction and light guiding glue (4) is mounted on a heat dissipation base plate (3); a pressure sensor (5) is mounted above the middle of a part, positioned at one side of the optical fiber (1), of the heat conduction and light guiding glue (4); a first minisize temperature sensor (6), a second minisize temperature sensor (7) and a third minisize temperature sensor (8) are respectively mounted above one end, the middle and the other end of a part, positioned at the other side of the optical fiber (1), of the heat conduction and light guiding glue (4); the pressure sensor (5), the first minisize temperature sensor (6), the second minisize temperature sensor (7) and the third minisize temperature sensor (8) are respectively connected with an alarm device (9); the alarm device is connected with a laser power source controller (10). Via the high power optical fiber laser key point protection device, the melting point position of the optical fiber can be well protected.
Description
Technical field
The present invention is high-capacity optical fiber laser key point protection device, belongs to Fiber laser technology field, especially
It is related to high-power all-fiber laser field.
Technical background
High-power all-fiber laser has the advantages such as good beam quality, high conversion efficiency, integrated level height in industry,
Military field has a wide range of applications.Modern industry is processed and military tactical weapon needs the defeated of optical fiber laser
Go out power to reach more than multikilowatt or even myriawatt magnitude.
But the production in the optical fiber laser of multikilowatt or more power needs to break through many core technologies, such as
The preparation of high power core devices, the protection of crucial heat generating spot, the protection of return light, photoelectric linkage control etc.,
These technology great majority are grasped for external fewer companies, such as IPG, Luo Fen, SPI etc..Domestic high-power fiber
Laser power index will reach advanced world standards must grasp this series of key technology.
The optical fiber that high-capacity optical fiber laser is adopted has specific surface area big, the advantage of perfect heat-dissipating, but
The fusing point position of some key points, such as gain fibre and all-fiber devices, because its caloric value is big, it generates heat
Area is little, so the heat load of these key points is high, optical fiber can be caused to burn when serious.Once fusing point position
Burn, wherein the high power laser light for transmitting can quickly burn optical fiber along optical fiber, the time of several seconds can
Whole all optical fiber system can be burnt, also irreversible damage can be brought to semiconductor laser when serious.Typically
The temperature that the fluoride coat of doubly clad optical fiber can bear only has 80 DEG C, more than this temperature fluoride coating
Layer can gradually melt or even burn.And the coat of fusing point is coated with after the completion of welding, can not show a candle to not locate
The uniformity of the coat of the doubly clad optical fiber of reason is good, thus for some key position fusing points protection particularly
It is important.Should reduce fusing point number when high-capacity optical fiber laser is designed, improve integrated level, but gain light
, there is fusing point between all-fiber devices inevitable in fine and all-fiber devices.As in resonator fiber grating with
Fusing point between gain fibre, the fusing point between grating and pump combiner, in amplifier pump combiner and
Fusing point between gain fibre.Transmitted in totally enclosed fibre-optic waveguide due to high-power all-fiber laser and swashed
Light, such as optical fiber have any one point to damage, and whole optical fiber laser cannot all work or even burn, and risk is high,
Damage cost huge.So the protection to key point therein is particularly important.Current business-like high power light
Crucial fusing point is directly installed after stability test in fibre laser, to wherein key point in optical-fiber laser
Monitoring during device use is little.High-capacity optical fiber laser can run into shake when used in industrial environment
It is dynamic, a series of moist, unfavorable factors such as high humidity, each when these factors are possible to destroy its work
Partial thermal balance.
The content of the invention
The invention aims to solve problem present in technical background and current high power all -fiber device
A kind of technological deficiency that part is present, there is provided crucial fusing point protection device in high-power all-fiber laser so that
The running status of high-capacity optical fiber laser each crucial fusing point position in use can be monitored, crucial fusing point
Position temperature beyond safety value reach warning value when can it is timely automated shut-off Laser Power Devices Backup lightpath.
High-capacity optical fiber laser key point protection device, including an optical fiber 1, thereon containing a fusing point position
2, it is characterised in that heat conduction leaded light glue 4 is wrapped in around the optical fiber 1 centered on fusing point position 2,
And be uniformly distributed, and the optical fiber 1 of parcel heat conduction leaded light glue 4 is installed along with radiating bottom plate 3, in light
The heat conduction leaded light glue 4 top centre position of fine 1 side is provided with pressure sensor 5, in the another of optical fiber 1
Heat conduction leaded light glue 4 top one end of side, the middle and other end be respectively mounted the first micro temperature sensor 6, the
Two micro temperature sensors 7 and the 3rd micro temperature sensor 8, pressure sensor 5, the first Miniature temperature are passed
Sensor 6, the second micro temperature sensor 7 and the 3rd micro temperature sensor 8 are connected respectively with alarm 9,
Alarm 9 is connected with laser power controller 10 again.
Cooling-water duct is installed in radiating bottom plate (3) lower surface.
From in terms of technical scheme, the invention has the beneficial effects as follows：
1st, the protection device of high-capacity optical fiber laser key point realizes the crucial fusing point of full-automatic protection, can be with root
The alarm temperature values that formulation is different according to optical fiber output power is different, are generally not more than 80 DEG C.There is setting
Warning temperature value alarm device 9 can in time send power cutoff instruction to laser power controller 10, Neng Gouji
When turn off Laser Power Devices, the crucial fusing point of protection avoids heat load from damaging.
2nd, the protection device is not only able to provide and timely protects, but also with potential risk forewarning function,
Melting occurs in heat conduction leaded light glue 4, and pressure sensor 5 occurs the numerical value that is not zero, can be given in alarm 9
Early warning, with the hidden danger in time to wherein occurring exclusion is given.
3rd, the protection device monitor set and defencive function realize photoelectric linkage control in one by protection device,
When laser goes wrong, timely power-off protection, safe and reliable.
4th, the protection device can be added with used in parallel to all key points of high-power all-fiber laser
To protect, the temperature data and pressure data of all of crucial fusing point are collected in alarm 9, carry out sequence
Number arrangement, according to show numerical value be known that for which position fusing point, realize total system monitor.
Description of the drawings
Fig. 1. schematic structural view of the invention.
Specific embodiment
High-capacity optical fiber laser key point protection device, including an optical fiber 1, thereon containing a fusing point position
2, it is characterised in that heat conduction leaded light glue 4 is wrapped in around the optical fiber 1 centered on fusing point position 2,
And be uniformly distributed, and the optical fiber 1 of parcel heat conduction leaded light glue 4 is installed along with radiating bottom plate 3, in light
The heat conduction leaded light glue 4 top centre position of fine 1 side is provided with pressure sensor 5, in the another of optical fiber 1
Heat conduction leaded light glue 4 top one end of side, the middle and other end be respectively mounted the first micro temperature sensor 6, the
Two micro temperature sensors 7 and the 3rd micro temperature sensor 8, pressure sensor 5, the first Miniature temperature are passed
Sensor 6, the second micro temperature sensor 7 and the 3rd micro temperature sensor 8 are connected respectively with alarm 9,
Alarm 9 is connected with laser power controller 10 again.
Cooling-water duct is installed in the lower surface of radiating bottom plate 3.
The present invention disclose a kind of high-capacity optical fiber laser key point protection device, structure such as figure go it is shown, its
Including：
One optical fiber 1, thereon containing a fusing point position 2, is generally double clad and increases in high-capacity optical fiber laser
Fusing point between beneficial optical fiber and passive matching optical fiber；One radiating bottom plate 3, places thereon optical fiber 1, and it is water that it is lower
Cold passage, is connected with cooling water, and cooling water temperature is not higher than 23 DEG C, and in the upper surface for placing optical fiber 1 one is carved with
Square groove, radiating bottom plate 3 be crucial fusing point radiating with monitoring platform, collect radiating with monitoring function in
Integrally；
One heat conduction leaded light glue 4, it is placed on radiating bottom plate 3 in square groove and is evenly distributed on optical fiber 1 week
Enclose, effect is that the heat that fusing point position 2 and optical fiber 1 are produced when high power laser light passes through is transmitted to into radiating
On base plate 3；
One pressure sensor 5, it does not connect in the side centre position of heat conduction leaded light glue 4 with heat conduction leaded light glue 4
Touch, in high-capacity optical fiber laser normal work, heat conduction leaded light glue 4 does not melt, and pressure sensor 5 does not have
There is touching pressure, reading is zero, when heat conduction leaded light glue 4 melts, pressure sensor 5 will be touched,
It just has the reading more than zero, in being reacted to alarm 9, and provides early warning in alarm 9.
One micro temperature sensor 6, it, in another lateral edges of heat conduction leaded light glue 4, is that real-time testing heat conduction is led
Temperature of the optical cement 4 when high-capacity optical fiber laser works, general high-capacity optical fiber laser normal work
When, its temperature range is that data transfer can be given in alarm 9 during more than 35 DEG C between 15-35 DEG C
Early warning, instructs in laser power controller 10 more than sending shut-off in 50 DEG C of alarm devices 9, and
When turn off Laser Power Devices.
Another micro temperature sensor 7, its heat conduction leaded light glue 4 opposite side in the middle of, with fusing point position 2 away from
Close to, the temperature for measuring is such as larger with the difference of micro temperature sensor 6,8, then illustrate fusing point position 2
Caloric value is big.When high-capacity optical fiber laser normally runs, the temperature range of micro temperature sensor 7 is generally
Between 15-35 DEG C, data transfer can provide early warning in alarm 9 during more than 35 DEG C, more than 50 DEG C
Shut-off instruction can be sent in alarm device 9 in laser power controller 10, Laser Power Devices are turned off in time.
Another micro temperature sensor 8, its heat conduction leaded light glue 4 opposite side other edge, its effect with it is micro-
Type temperature sensor 6 is consistent, and compares with the temperature data of micro temperature sensor 6.
One alarm 9, it is connected with pressure sensor 5 and micro temperature sensor 6,7,8, and effect is
The data of pressure sensor 5 and micro temperature sensor 6,7,8 are received, and is reaching the warning value of setting
When be given corresponding early warning and send power cutoff instruction to laser power controller 10.
One laser power controller 10, it is connected with alarm 9, controls when effect is normal work all
The pumping semiconductor laser drive power of high-power all-fiber laser, including driving power supply switch and power supply
The stepping of electric current increases.And when the power remove for receiving alarm 9 is instructed, can turn off in time all
The driving power supply of semiconductor laser, shut-off driving power supply order is to resonance from main amplifier stage to pre-amplification stage
Chamber turns off successively, and all power remove times are less than 5ms.
The protection device transfers back to alarm 9 by micro temperature sensor 6,7,8 and pressure sensor 5
In data judge the febrile state of the fusing point position 2.By temperature sensor 6,7,8 and pressure sensing
Device 5 realizes respectively timely power cutoff protection and warning function.In terms of emergent shut-off method protection, if micro-
The temperature value of type temperature sensor 7 occurs the warning value higher than setting in high-capacity optical fiber laser run duration,
Then alarm sends the instruction of power cutoff, protection optical fiber of cutting off the electricity supply in time can to laser power controller 10
Laser instrument.Meanwhile, the data of the micro temperature sensor 6,8 of auxiliary monitoring also have early warning value and warning value,
With place micro temperature sensor 7 break down or welding after coat interface heating cause temperature liter
It is high.
Melt warning aspect in long-play heat conduction leaded light glue 4, if the numerical value of pressure sensor is 0, explanation is led
Thermal conductivity optical cement 4 does not melt, if the numerical value of pressure sensor is more than 0, illustrates that heat conduction leaded light glue 4 melts
Change, should in time check the fusing point.
The protection device has the advantages that small volume, sensitivity height, Automatic Control.Protection is divided into early warning and police
Guard against two states protection.Artificial repair and maintenance is needed during early warning, can be had automatically when reaching the state of alert
The closing Laser Power Devices of sequence.The protection device can be with used in parallel, can be to high-power all-fiber laser
All key points are protected by, and the temperature data and pressure data of all of crucial fusing point are collected into alarm 9
In, sequence number arrangement is carried out, it is known that for which position fusing point according to the numerical value for showing, realize total system
Monitoring.
The protection device is simple, it is possible to achieve commercially produce and be assembled to high-power all-fiber laser product
In, improve the security of high-power all-fiber laser.
Particular embodiments described above, has carried out entering one to the purpose of the present invention, technical scheme and beneficial effect
Step is described in detail, should be understood that the specific embodiment that the foregoing is only of the invention, and without
In limit the present invention, all any modifications within the spirit and principles in the present invention, made, equivalent,
Improve etc., should be included within the scope of the present invention.Additionally, above-mentioned determine each element and method
Justice is not limited in various concrete structures, shape or the mode mentioned in embodiment, ordinary skill people
Member can simply be changed or be replaced to it, for example：By in simple application of the present invention to full-optical-fiber laser
Coat fault location protection, the protection of stop position, the protection of pump combiner position, and covering
Light filters position temperature protection.
The technical scheme is that：High-power all-fiber laser key point protection device, structure such as Fig. 1
It is shown, including a radiating bottom plate 3, it is that the temperature of whole protection device is produced and monitor supervision platform, it is one piece of heat
The high metal derby of conductance, can be copper or aluminium, and cooling water is connected with it, and a square groove is left above,
To place heat conduction leaded light glue 4, and four little counterbores are left at the edge of groove, be respectively used to placement force biography
Sensor 5 and micro temperature sensor 6,7,8, placement location is as shown in Figure 1；One optical fiber 1, has thereon molten
Point position 2, it is the object of desired protection where thermal source generation that fusing point position 2 is, the painting of fusing point position
Coating is coated after fusing；One heat conduction leaded light glue 4, it is uniformly placed on the groove of the top of radiating bottom plate 3
In, optical fiber 1 is not crossed, its Main Function is the heat transfer that will be produced on fusing point position 2 and optical fiber 1 to radiating
Base plate 3, and the water-cooling channel by radiating bottom plate 3 consumes heat, while by swashing that fusing point position 2 spills
Light-output；One pressure sensor 5, in the side of heat conduction leaded light glue, it is to judge whether heat conduction leaded light glue 4 melts
Change, once heat conduction leaded light glue 4 melts, the probe of pressure sensor 5 will be touched, it is in alarm 9
In just have the reading that is not zero accordingly, and provide early warning；Three micro temperature sensors 6,7,8 are used for
The temperature of another three diverse locations of lateral edges of monitoring heat conduction leaded light glue 4, while micro temperature sensor 6 and 8
In the both sides symmetric position of temperature sensor 7, micro temperature sensor 6,8 measures two values and should be phase
Close values, if there is the data difference more than 5 DEG C, then illustrate that rotten or radiating bottom plate occurs in heat conduction leaded light glue 4
There is blocking in 3 water-cooling channel, then need to stop laser work, queueing problem hidden danger；One alarm 9, is used for
What the real time temperature numerical value and pressure sensor 5 measured by collection micro temperature sensor 6,7,8 was gathered
Real-time data situations, while corresponding police can be set according to the power output of high-power all-fiber laser
Temperature value is guarded against, once there is any one data value to reach warning value in temperature sensor 6,7,8, can be timely
Shut-off instruction is sent to laser power controller 10, time interval is less than 1ms, if the institute of pressure sensor 5
The data for collecting are more than 0, and illustrating that melting occurs in heat conduction leaded light glue 4 can also provide early warning；One laser electricity
Source controller 10, the driving power supply unification control of its semiconductor pumping sources to whole high-power all-fiber laser
System, including the semiconductor laser of the resonator of laser signal seed source driving power supply and each amplifying stage half
The driving power supply of conductor laser, can carry out moment shut-off to all of driving power supply, urgent feelings occurring
Backup lightpath during condition, when optical fiber laser runs, the boot sequence of power supply is also by laser power controller control
System, it is to avoid the power supply of amplifying stage is opened when seed signal source is not turned on, damages gain fibre.
When being connected with high power laser light in optical fiber 1, fusing point position 2 can be because laser power, fusion joining process, painting
Coating process level is different and produce corresponding heat, its heat is consumed by radiating bottom plate 3 and heat conduction leaded light glue 4
Dissipate, the temperature under the optical fiber laser normal operation of general 2kW at fusing point position 2 is not higher than 50 DEG C,
By the heat consumption produced at fusing point position 2 and heat can be maintained flat by radiating bottom plate 3 and heat conduction leaded light glue 4
Weighing apparatus.But exclusion high-capacity optical fiber laser is difficult in commercial Application and occurs vibrations, environment in use
The impact of the unfavorable factor such as temperature height, humidity, dust so that the thermal balance at fusing point position 2 is broken,
There is the situation that short time heat increases sharply.The monitoring and protection of this when is just necessary, if temperature is passed
The temperature data of the monitoring of sensor 7 exceedes warning value, and alarm 9 can immediately send shut-off instruction to Laser Power Devices
Controller 10 turns off all of semiconductor laser drive power, and Backup lightpath is not damaged.In multiple key points
During protection device, corresponding sequence number is had on alarm 9, now can be obtained according to the sequence number on alarm 9
Know which fusing point position 2 goes wrong.
The present invention discloses a kind of high-capacity optical fiber laser key point protection device, is used by optical fiber laser
During, the data that the temperature sensor and pressure sensor of crucial fusing point position are passed back are judging fusing point
Running status, once melting temperature reaches warning numerical value, can issue instructions to Laser Power Devices by alarm
Cutting off Laser Power Devices, protection optical fiber laser is avoided damage to or even burnt controller.
High-capacity optical fiber laser key point protection device, structure as shown in figure 1, including：
One optical fiber 1, thereon containing a fusing point position 2；
One radiating bottom plate 3, places thereon optical fiber 1；
One heat conduction leaded light glue 4, it is on radiating bottom plate 3 and is evenly distributed on around optical fiber 1；
One pressure sensor 5, it is in the middle of the side of heat conduction leaded light glue 4；
One micro temperature sensor 6, its another lateral edges in heat conduction leaded light glue 4；
Another micro temperature sensor 7, it is in the middle of the opposite side of heat conduction leaded light glue 4；
Another micro temperature sensor 8, its opposite side other edge in heat conduction leaded light glue 4；
One alarm 9, itself and pressure sensor 5, micro temperature sensor 6,7,8 is connected；
One laser power controller 10, it is connected with alarm 9.
The protection device is characterised by by micro temperature sensor 6,7,8, and pressure sensor 5 transfers back to
Data in alarm 9 judge the febrile state of the fusing point, if the numerical value of pressure sensor is 0, explanation is led
Thermal conductivity optical cement 4 does not melt, if the numerical value of pressure sensor is more than 0, illustrates that heat conduction leaded light glue 4 melts
Change, should in time check the fusing point.If arbitrary temperature for measuring is higher than in micro temperature sensor 6,7,8
The early warning value of setting, then alarm 9 can provide early warning；If in micro temperature sensor 6,7,8
Arbitrary temperature for measuring sends to laser power controller 10 and close higher than the warning value for setting, then alarm 9
The instruction in power-off source, protection optical fiber laser of cutting off the electricity supply in time, in micro temperature sensor 6,7,8
The early warning value that all of temperature data below sets, without pressure reading in pressure sensor 5, then reports to the police
Device 9 is not in any early warning, and laser power controller 10 can normal operational support high power all -fiber
Laser instrument normal work.
Cooling-water duct is connected with described conductive sole plate 3, cooling water temperature is not higher than 23 DEG C.
Described heat conduction leaded light glue 4 is coated on optical fiber, and is uniformly coated in fixed groove in conductive sole plate 3
One layer.The laser that the heat conduction leaded light glue 4 can reveal fusing point position is derived, while heat conduction, reduces laser and exist
Heat accumulation at fusing point position 2.
The pressure sensor 5 is micro pressure sensor, guide-lighting in heat conduction as long as there is pressure just can measure
When glue 4 does not melt, pressure sensor 5 is popped one's head in and do not contact anything, and reading now is 0, as long as having
The heat conduction leaded light thawing of glue 4 touches the probe of pressure sensor 5, and it just has reading, and shows in alarm 9
It is shown with pressure alert status.
The precision of the micro temperature sensor 6,7,8 is 0.05 DEG C, response time ms magnitude, temperature measuring area
Between 5-500 DEG C.And the data for measuring are transferred back in alarm 9 and shown.
The alarm 9 reads the data that pressure sensor 5 and micro temperature sensor 6,7,8 are passed back,
And corresponding alarming value can be set according to the power output of high-power all-fiber laser and give Laser Power Devices control
Device 10 sends the data value of stop command.
The laser power controller 10 is the driving of high-power all-fiber laser unit semiconductor laser
The controller of power supply, including the semiconductor laser drive power of resonator and each amplifying stage.Institute can be realized
The switch lifting current marching technique control for having power supply also includes emergency jerk power-off in order, and all power supplys are closed
The disconnected time is less than 5ms.
To solve this technical barrier, the present invention discloses a kind of key point protection device, in high power optical fibre laser
Monitor the running status of crucial fusing point during device use always.There is provided timely to the fusing point position of easy heating
Hidden danger early warning during jerk is protected and long-time is operated.Realize the dual guarantor of high-capacity optical fiber laser key point
Shield, to guarantee that high-capacity optical fiber laser being capable of long-time steady operation.
Claims (2)
1. high-capacity optical fiber laser key point protection device, an including optical fiber (1), it is molten containing one thereon
Point position (2), it is characterised in that heat conduction leaded light glue (4) is wrapped in centered on fusing point position (2)
Optical fiber (1) around, and be uniformly distributed, and will parcel heat conduction leaded light glue (4) optical fiber (1) one
Rise and be arranged on radiating bottom plate (3), in the middle of heat conduction leaded light glue (4) top of the side of optical fiber (1)
Position is provided with pressure sensor (5), in heat conduction leaded light glue (4) top one of the opposite side of optical fiber (1)
End, the middle and other end are respectively mounted the first micro temperature sensor (6), the second micro temperature sensor (7)
With the 3rd micro temperature sensor (8), pressure sensor (5), the first micro temperature sensor (6),
Two micro temperature sensors (7) and the 3rd micro temperature sensor (8) are connected respectively with alarm (9),
Alarm (9) and it is connected with laser power controller (10).
2. high-capacity optical fiber laser key point protection device according to claim 1, it is characterised in that
Cooling-water duct is installed in radiating bottom plate (3) lower surface.
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| CN201510732495.1A CN106654812A (en) | 2015-11-02 | 2015-11-02 | High power optical fiber laser key point protection device |
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| CN111337064A (en) * | 2020-03-25 | 2020-06-26 | 南京智慧基础设施技术研究院有限公司 | Fixing method of fiber grating string sensor |
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| CN109390842B (en) * | 2017-08-10 | 2020-06-02 | 大族激光科技产业集团股份有限公司 | Processing method for returning light of vacant input branch of pump beam combiner and optical fiber laser |
| CN111337064A (en) * | 2020-03-25 | 2020-06-26 | 南京智慧基础设施技术研究院有限公司 | Fixing method of fiber grating string sensor |
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Application publication date: 20170510 |