CN209472199U - 1940nm thulium-doped all-fiber laser device and medical device based on the laser - Google Patents

Abstract

1940nm thulium-doped all-fiber laser device and medical device based on the laser, it is related to optical fiber field of medical technology, it is poor to solve 2 mum wavelength effect of existing apparatus, output power is low, volume is big, the problem that stability is poor and thermal diffusivity is bad, the utility model laser includes semiconductor laser, bundling device, high reflective grid, two sections of thulium doped fibers, low reflective grid, reversed bundling device, backward pumping laser, cladding light stripper, first fiber output head, optical fiber aqueous cold plate and coolant refrigeration equipment, pass through the optical fiber fusion welding technology of good refrigeration heat-radiation structure and high quality, the high power laser light output of 300W is reached；Medical device includes above-mentioned laser, further includes driving equipment, power conversion module, the second fiber output head, fiber coupling attachment device and medical optical fiber, uses direct coupling system between laser and medical optical fiber, reach higher coupling efficiency；The utility model is for carrying out rubble and cutting tissue in medical treatment.

Description

1940nm thulium-doped all-fiber laser device and medical device based on the laser

Technical field

The utility model relates to optical fiber field of medical technology, more particularly to laser cutting and crushing technique.

Background technique

The laser of 2 mum wavelengths has a wide range of applications in fields such as national defence, medical treatment and biological studies, laser cutting and Rubble field status.

Chinese invention patent CN109259859A was disclosed on 01 25th, 2019 based on 2 mum wavelength laser of all -fiber Therapeutic equipment, therapeutic equipment includes control cabinet, cooling system, 2 mum wavelength laser of all -fiber and optical coupling, the cooling system System is made of cooling-water machine and cooling water channel, and the output end of control cabinet is separately connected 2 μm of waves of cooling-water machine and all -fiber of cooling system The laser generator of long laser；The thulium that the utility model is about 2 μm by the 2 continuous output wavelength of mum wavelength laser of all -fiber Laser carries out tissue cutting；

The device has the drawback that 1.2 mum wavelength absorption of human body are bad；2. being pumped using direct mode, the conversion of light Low efficiency；3. output coupling is Lens Coupling, structure is complicated is not easy to mobile and operates, and coupling efficiency is low；4. operating to one Kind mode, has limitation；5. cooling system is water-cooling system, poor heat radiation；6. output power is 5W~150W, output power It is low；7. 2 mum wavelength laser of all -fiber does not fix device, slightly other stress will damage optical fiber, and device connection is unstable, It is mobile inconvenient；

Chinese utility model patent CN207545202U disclosed on 06 29th, 2018 be provided simultaneously with internal rubble and Soft tissue excision 2 mum laser medical devices, device include: high-average power and big energy double mode operating 2 microns swash Light source, control and display, photoswitch and endoscope, 2 mum lasers of the high-average power and the operating of big energy double mode Source include: optical resonator, driving power, control circuit, positioned at the intracavitary semiconductor laser of optical resonance, mix thulium ion swash Luminescent crystal and temperature automatic precision regulate and control and match water cooler.

The device has the drawback that 1.2 mum wavelength absorption of human body are bad；2. device uses solid state laser, solid swashs The big stability of light body product is poor, while not only wavelength is not best water absorption peak to solid state laser, and when by one section Between after use, the change of lens position can all influence output effect, so that the patience of device is with low；3. cooling system is water cooling system System, poor heat radiation；Available 2 μm of the big energy pulse of solid state laser, but the volume of Solid State Laser and stability are always to swash Optical arena is difficult to the project captured, so this technology is pushed slowly in medical field；

But 2 μm of wavelength is not best water absorption peak, in the course of surgery long action time, therefore is caused not only medical Target position obtain the effect of laser, neighbouring other tissues also be easy to cause the injury of laser；

And 1940nm wavelength has the advantage that compared with 2 mum wavelengths

1940nm wavelength is located exactly on human body water absorption peak, as shown in figure 5,1940nm wavelength is in water as can be seen from Fig. Stronger compared with 2 mum wavelengths in absorbability, this advantage makes tissue cutting precisely, and will not generate wound to other tissues simultaneously Evil；

Penetration depth is shallower in the tissue for 1940nm wavelength, as shown in fig. 6,2 mum wavelengths penetrate deep 0.4mm or so, and 1940nm wavelength penetration depth only 0.1mm-0.2mm, this advantage make it is small for wound caused by medical treatment, to human injury It is low；

However medical 1940nm laser can not solve the technical barrier of high-average power Yu the big energy of pulse at present, make It is applied at the basic laser without 1940nm wavelength in the medical fields such as laser cutting and rubble.

Therefore there are the following problems for existing laser medicine cutting and rock crushing plant:

It 1, is mostly 2 mum wavelengths, 2 mum wavelength absorption of human body are ineffective；

2, output power is low, and existing medical device maximum power output is only 150W；

3, device includes compound lens, causes device connection unstable；

4, device volume is big, and stability is poor, and durability is low；

5, thermal diffusivity is bad.

Utility model content

The utility model aims to solve the problem that being currently used for the laser of medical treatment cutting and rubble is almost 2 mum wavelengths, but 2 μm Wavelength absorption of human body is ineffective, is easy to generate injury to other tissues；Output power is low；Device is due to including various lens groups Conjunction causes device connection unstable；Device volume is big, stability is poor, and durability is low and existing apparatus thermal diffusivity is bad asks Topic.

To solve the above problems, technical solution is as follows:

The utility model provides 1940nm thulium-doped all-fiber laser device, including semiconductor laser 3-1, bundling device 3-2, It is high reflective grid 3-3, the first thulium doped fiber 3-4-1, the second thulium doped fiber 3-4-2, low reflective grid 3-5, reversed bundling device 3-6, anti- To pump laser 3-7, cladding light stripper 3-8, the first fiber output head, optical fiber aqueous cold plate 2 and coolant refrigeration equipment,

The central wavelength of semiconductor laser 3-1 is 790 ± 3nm,

The emergent light of semiconductor laser 3-1 through in the incident supreme reflective grid 3-3 of bundling device 3-2,

High reflective grid 3-3 is 1.94 μm of reflective grid of height,

The emergent light of high reflective grid 3-3 is incident in low reflective grid 3-5 through the first thulium doped fiber 3-4-1,

Low reflective grid 3-5 is 1.94 μm of low reflective grid；

The emergent light of low reflective grid 3-5 is incident in reversed bundling device 3-6 through the second thulium doped fiber 3-4-2,

High reflective grid 3-3, the first thulium doped fiber 3-4-1, the second thulium doped fiber 3-4-2 and low reflective grid 3-5 form resonance Chamber,

Backward pumping laser 3-7 provides the excitation energy for resonant cavity, and the central wavelength of backward pumping laser 3-7 is 790 ± 3nm,

The emergent light of backward pumping laser 3-7 is incident in resonant cavity through reversed bundling device 3-6,

The emergent light of resonant cavity is incident in cladding light stripper 3-8 by reversed bundling device 3-6,

The emergent light of cladding light stripper 3-8 is emitted through passive fiber, and the light exit side of passive fiber is fixed on the first light In fine export head；

Optical fiber aqueous cold plate 2 is used to radiate for the first thulium doped fiber 3-4-1 and the second thulium doped fiber 3-4-2,

Coolant refrigeration equipment is used to be optical fiber aqueous cold plate 2, bundling device 3-2, Gao Fanguang grid 3-3, the first thulium doped fiber 3-4- 1, the second thulium doped fiber 3-4-2, low reflective grid 3-5, reversed bundling device 3-6, semiconductor laser 3-1 and backward pumping laser 3-7 heat dissipation.

Based on the medical device of 1940nm thulium-doped all-fiber laser device, including driving equipment, power conversion module, the second light Fine export head, fiber coupling attachment device 4 and medical optical fiber,

The driving signal output end of the driving equipment driving signal input and reversing pump with semiconductor laser 3-1 simultaneously The driving signal input of Pu laser 3-7 connects,

The voltage input end and mains supply of power conversion module are connected,

The voltage output end of power conversion module swashs with the voltage input end and backward pumping of semiconductor laser 3-1 simultaneously The voltage input end of light device 3-7 connects,

The light incident side of medical optical fiber is placed in the second fiber output head, and the second fiber output head is placed in fiber coupling connection The coupled end of device 4,

Fiber coupling attachment device 4 is used to the emergent light of 1940nm thulium-doped all-fiber laser device 3 being coupled into medical optical fiber In.

The application has the advantage that

1, the central wavelength that laser goes out light is 1940nm, which is located exactly on human body water absorption peak, so that medical Device cutting precisely, will not generate injury to other tissues；

Penetration depth is shallow in the tissue for 1940nm wavelength, only 0.1mm-0.2mm, so that medical device cutting wound is small, only Blood effect is good, low to human injury；

2, make the 300W that reaches as high as of output power, output work with higher by the brand new of this laser Rate；

So that medical device has cutting tissue, effect is fast, operating time is short, bleeding risk is low, operation risk is low and extensive Short advantage of multiple time；And lithotrity effect is obviously improved；Existing fiber rock crushing plant only has the output power of 150W, the application Power doubles, and operating time reduces 50%；

3, medical device uses direct-coupled fibre system, and laser emitting optical fiber and the medical optical fiber into human body is straight Coupling is connect, coupling efficiency is high, realizes 90% or more coupling efficiency, small in size, easy to remove and operation；

4, the application using coolant refrigeration equipment freeze, temperature is more stable, and volume is smaller, by heat dissipation in need system It is surrounded by refrigerator pipes, the control of good temperature can use that light is more stable, and effect is more obvious；

5, the pump light absorption efficiency of the application is more than 96%.

Detailed description of the invention

Fig. 1 is the schematic diagram of 1940nm thulium-doped all-fiber laser device；

Fig. 2 is the medical device schematic diagram based on 1940nm thulium-doped all-fiber laser device；

Fig. 3 is the structural schematic diagram of fiber coupling attachment device；

Fig. 4 is optical fiber aqueous cold plate and its partial enlargement structure chart, and wherein A indicates that the partial enlarged view of annular groove, B indicate solid Determine the partial enlarged view in hole；

Fig. 5 is the water absorption coefficient curve graph of 400nm-2013nm wavelength laser；

Fig. 6 is the laser penetration depth signal in the tissue of 532nm, 790nm-980nm, 2090nm and 1940nm wavelength Figure；

In figure: 1. semiconductor laser control cabinets；2. optical fiber aqueous cold plate；3.1940nm thulium-doped all-fiber laser device；3-1. Semiconductor laser；3-2. bundling device；The reflective grid of 3-3. high；3-4. thulium doped fiber；The first thulium doped fiber of 3-4-1.；3-4-2. the Two thulium doped fibers；The low reflective grid of 3-5.；The reversed bundling device of 3-6.；3-7. backward pumping laser；3-8. cladding light stripper；4. Fiber coupling attachment device；5. refrigeration compressor.

Specific embodiment

It is to be understood that although in detail below illustrate the exemplary realization side of the embodiments of the present invention Case, but currently known or not yet existing any other suitable technology can be used to realize in disclosed composition.Cause This, the utility model should not be limited to absolutely the exemplary implementation scheme being described below, but can want in accompanying right Ask and its equivalent program in the range of be appropriately modified.The utility model is more fully described now with reference to attached drawing, it is attached The illustrative embodiments of the utility model are shown in figure.But the utility model can be realized according to more different forms, And it is not construed as being limited to embodiments set forth herein.On the contrary, thesing embodiments are provided so that the disclosure becomes Must be thorough and complete, and the design of the utility model is entirely delivered to those skilled in the art.

Specific embodiment one illustrates present embodiment below with reference to Fig. 1 and Fig. 4:

Present embodiments provide for 1940nm thulium-doped all-fiber laser device, including semiconductor laser 3-1, bundling device 3-2, It is high reflective grid 3-3, the first thulium doped fiber 3-4-1, the second thulium doped fiber 3-4-2, low reflective grid 3-5, reversed bundling device 3-6, anti- To pump laser 3-7, cladding light stripper 3-8, the first fiber output head, optical fiber aqueous cold plate 2 and coolant refrigeration equipment,

The central wavelength of semiconductor laser 3-1 is 790 ± 3nm,

The emergent light of semiconductor laser 3-1 through in the incident supreme reflective grid 3-3 of bundling device 3-2,

High reflective grid 3-3 is 1.94 μm of reflective grid of height,

The emergent light of high reflective grid 3-3 is incident in low reflective grid 3-5 through the first thulium doped fiber 3-4-1,

Low reflective grid 3-5 is 1.94 μm of low reflective grid；

The emergent light of low reflective grid 3-5 is incident in reversed bundling device 3-6 through the second thulium doped fiber 3-4-2,

High reflective grid 3-3, the first thulium doped fiber 3-4-1, the second thulium doped fiber 3-4-2 and low reflective grid 3-5 form resonance Chamber,

Backward pumping laser 3-7 provides the excitation energy for resonant cavity, and the central wavelength of backward pumping laser 3-7 is 790 ± 3nm,

The emergent light of backward pumping laser 3-7 is incident in resonant cavity through reversed bundling device 3-6,

The emergent light of resonant cavity is incident in cladding light stripper 3-8 by reversed bundling device 3-6,

The emergent light of cladding light stripper 3-8 is emitted through passive fiber, and the light exit side of passive fiber is fixed on the first light In fine export head；

Optical fiber aqueous cold plate 2 is used to radiate for the first thulium doped fiber 3-4-1 and the second thulium doped fiber 3-4-2,

Coolant refrigeration equipment is used to be optical fiber aqueous cold plate 2, bundling device 3-2, Gao Fanguang grid 3-3, the first thulium doped fiber 3-4- 1, the second thulium doped fiber 3-4-2, low reflective grid 3-5, reversed bundling device 3-6, semiconductor laser 3-1 and backward pumping laser 3-7 heat dissipation；

High reflective grid 3-3 is 99% to the reflectivity of 1940nm light；

Low reflective grid 3-5 is 10% to the reflectivity of 1940nm light；

Multiple diameters not equal annular groove is carved in 2 upper surface of optical fiber aqueous cold plate, and multiple annular grooves are arranged concentrically,

First thulium doped fiber 3-4-1 and the second thulium doped fiber 3-4-2 is uniformly coiled one by one in annular groove,

And annular groove inner fiber is not overlapped,

Heat-conducting medium is filled in annular groove,

2 lower surface of optical fiber aqueous cold plate is evenly distributed with the refrigerator pipes of coolant refrigeration equipment；

2 upper surface of optical fiber aqueous cold plate having a size of 400mm*400mm,

The groove depth of annular groove is 1mm, groove width 1mm, wherein groove width is the difference of the internal-and external diameter of annular groove,

Heat-conducting medium is heat-conducting silicone grease；

Bundling device 3-2, Gao Fanguang grid 3-3, the first thulium doped fiber 3-4-1, the second thulium doped fiber 3-4-2, low reflective grid 3- 5, reversed bundling device 3-6 and cladding light stripper 3-8 are both secured to 2 upper surface of optical fiber aqueous cold plate；

Coolant refrigeration equipment is refrigeration compressor 5；

The refrigerator pipes of refrigeration compressor 5 are copper pipe；

The coolant refrigeration equipment of present embodiment is not limited to refrigeration compressor 5, can reach same effect or realize identical The equipment of function, should all be within protection scope；

Welding is carried out by each device of U.S.'s Vytran heat sealing machine to laser；

3 schematic diagram of 1940nm thulium-doped all-fiber laser device mixes thulium light as shown in Figure 1, low reflective grid 3-5 is placed on two sections Between fine 3-4 i.e. the first thulium doped fiber 3-4-1 and the second thulium doped fiber 3-4-2, thulium doped fiber 3-4 is preferably absorbed The light that semiconductor laser 3-1 is issued, then perturbation is carried out to optical path by low reflective grid 3-5, make more semiconductor laser 3-1 The light of sending is converted into the laser of 1940nm, and outgoing reference optical power is 5W to 300W；Realize 96% efficient output and current The 1940nm laser of highest 300W exports；

The course of work and principle:

Semiconductor laser 3-1 drives out light by power supply power supply, by driving equipment, and driving equipment is in the prior art Laser driver device,

The six beam light that semiconductor laser 3-1 is issued are merged into light beam by bundling device 3-2,

The emergent light of bundling device 3-2 enters in the first thulium doped fiber 3-4-1 through excessively high reflective grid 3-3 welding, Gao Fanguang grid 3-3 is 99% to the reflectivity of 1940nm light；

Thulium doped fiber 3-4 absorbs the emergent light of high reflective grid 3-3,

The emergent light of first thulium doped fiber 3-4-1 passes through low reflective grid 3-5, reflection of the low reflective grid 3-5 to 1940nm light Rate is 10%,

The emergent light of low reflective grid 3-5 is incident in reversed bundling device 3-6 through the second thulium doped fiber 3-4-2, Gao Fanguang grid 3-3 and low reflective grid 3-5 is to select wavelength device,

High reflective grid 3-3, the first thulium doped fiber 3-4-1, the second thulium doped fiber 3-4-2 and low reflective grid 3-5 form resonance Chamber,

Backward pumping laser 3-7 provides the excitation energy for resonant cavity, and the central wavelength of backward pumping laser 3-7 is 790 ± 3nm,

Reversed semiconductor laser 3-7 equally passes through power supply power supply, is driven and is exported by driving equipment, backward pumping laser The emergent light of device 3-7 is incident in resonant cavity through reversed bundling device 3-6, is amplified to laser,

The emergent light of resonant cavity is incident to cladding light stripper 3-8 by reversed bundling device 3-6 and filters out interference in covering Light,

The emergent light of cladding light stripper 3-8 is emitted through passive fiber, and the light exit side of passive fiber is fixed on the first light In fine export head, the light exit side that the first fiber output head carries passive fiber exports laser；

The annular groove of concentric ring-shaped of multiple and different diameters for placing thulium doped fiber 3-4 is carved on optical fiber aqueous cold plate 2,

Two sections of thulium doped fiber 3-4 coilings are placed in annular groove,

The thulium doped fiber 3-4 of winding in a ring groove is not overlapped as far as possible, is not covered, and it is high that overlapping is covered on laser power When cause the probability burnt also relatively high,

Wherein, the shape of annular groove is also not fixed, and the slot with present embodiment same effect can also can be achieved for ellipse etc. Shape, should all be within the scope of protection of this application；

Heat-conducting silicone grease is filled in annular groove, heat-conducting silicone grease is only to provide a kind of embodiment, but not limited to this, Ren Heneng Enough carrying out thermally conductive heat-conducting medium in the prior art for two sections of thulium doped fiber 3-4 all should be within the scope of protection of this application；

2 bottom of optical fiber aqueous cold plate is evenly distributed with the refrigerator pipes of refrigeration compressor 5；

2 top surface cross sectional dimensions of optical fiber aqueous cold plate is 400mm*400mm, and the groove depth of annular groove is 1mm, groove width 1mm；This The size of the optical fiber aqueous cold plate 2 provided in embodiment and the size of annular groove are only the implementation in order to illustrate present embodiment Journey and principle, size are not limited only to this, can reach same effect size or only to the shape of aqueous cold plate and annular groove into It has gone and has changed and process, be regarded as the inspiration by the application, it should all be within the scope of protection of this application；

The output end of refrigeration compressor 5 is copper pipe in present embodiment,

Refrigeration compressor 5 in present embodiment be only this application provides a kind of embodiment, can be continual and steady For device refrigeration device in the prior art can also be replaced, be replaced or carried out using the device of equivalent effect compared with Small change all should be within the scope of protection of this application；

Refrigeration compressor 5, which is powered, starts to work, and refrigeration compressor 5 is semiconductor laser 3-1 and backward pumping laser 3-7 refrigeration and heat dissipation,

Refrigeration compressor 5 and optical fiber aqueous cold plate 2 are bundling device 3-2, Gao Fanguang grid 3-3, thulium doped fiber 3-4, low reflective grid 3-5, reversed bundling device 3-6 and cladding light stripper 3-8 these device refrigeration radiatings, good heat dissipation provide for high-power output Powerful guarantee,

Finally obtain the 1940nm laser of the high-output power of 300W；

The characteristics of present embodiment:

Other optical fiber lasers substantially only have one section of thulium doped fiber 3-4, and the thulium doped fiber 3-4 in present embodiment is Two sections i.e. the first thulium doped fiber 3-4-1 and the second thulium doped fiber 3-4-2, we call the semiconductor laser 3-1 light issued Pump light, pump light inject in thulium doped fiber 3-4, and the 1940nm laser of the stronger output of pump light is stronger, but can be in this mistake Very big heat is generated in journey, this is that optical fiber laser is caused to be unable to reach high-power one of the main reasons；

Low reflective grid 3-5 is placed on two sections of thulium doped fibers by the 1940nm thulium-doped all-fiber laser device 3 in present embodiment Among 3-4, thulium doped fiber 3-4 can preferably absorb the light of semiconductor laser 3-1 sending, via low reflective grid 3-5 to light Road carries out perturbation, and the light for issuing more semiconductor laser 3-1 is converted into the laser of 1940nm, backward pumping laser 3- 7 pairs of 1940nm laser amplify, and by very stable 1940nm laser amplifier to desired power, utilize reversed semiconductor laser The specific position of device 3-7 pumping and low reflective grid 3-5 keeps the pump light entered in resonant cavity hot when being converted to 1940nm laser Amount is more evenly distributed, and the higher obtained laser power of light for being equivalent to entrance is higher, but the heat generated is also highly uniform, leads to The higher the better for the absorption efficiency of pump light in normal situation, and absorption efficiency is high, and heat is few, and laser power out is high, this embodiment party Formula pump absorption efficiency reaches 96%；

Thulium doped fiber 3-4 can generate a large amount of heat during absorbing the semiconductor laser 3-1 emergent light of 790nm, 2 structure of optical fiber aqueous cold plate is as shown in figure 4, the square structure of whole device top view, having a size of 400mm*400mm, A in Fig. 4 For the partial enlargement effect of annular groove, exactly by being machined into many sulculuses, because determining what optical fiber laser was born One of the main reason for power, is exactly how heat caused by doped fiber 3-4 effectively controls and disperse, present embodiment In optical fiber aqueous cold plate 2 on annular groove in fill heat-conducting silicone grease, by thulium doped fiber 3-4, all coiling is best in annular groove Thulium doped fiber 3-4 should not be overlapped, and overlapping is easy to cause laser to burn when power is high, as long as can be by thulium doped fiber 3-4 Coiling is placed in annular groove, and the surrounding of the side of thulium doped fiber 3-4 is contacted with heat-conducting medium, contacts more heat dissipation effects more It is good, and the position that the refrigeration copper tube for placing the annular groove lower section exactly refrigeration compressor 5 of optical fiber passes through, heat-conducting silicone grease and system The collective effect of cold pipe makes thulium doped fiber 3-4 obtain extraordinary heat dissipation, the optical fiber laser ratio with other structures, out light More stable, power is higher；B is the partial enlarged view of fixation hole on fiber reel in Fig. 4, and the fixation hole provided in present embodiment is Threaded hole；The uniform array threaded hole of M2.5 on optical fiber aqueous cold plate 2, can by devices all on 1940nm optical fiber laser It is all fixed on optical fiber aqueous cold plate 2, threaded hole makes structure simple, is moved easily, although other optical fiber lasers have reached The effect of light, but it is mobile difficult, slightly there are other stress that will damage optical fiber, so power is extremely difficult to higher, this implementation Optical fiber aqueous cold plate 2 in mode directly fixes all fibre optic connecting portions and thulium doped fiber 3-4, is not only moved easily, but also Sufficiently stable, the passive fiber only output and input is external, so that device stability with higher；

The copper pipe that 2 bottom plate of optical fiber aqueous cold plate has refrigeration compressor 5 to freeze, all thulium doped fiber 3-4 and needs to radiate Device freeze-radiate by refrigeration compressor 5；The device makes simple, strong operability, to thulium doped fiber 3-4's Heat dissipation effect is good, and due to special annular groove encapsulation technology, the coiling of thulium doped fiber 3-4 has very big flexibility, leads to Overstress coils the first thulium doped fiber 3-4-1 and the second thulium doped fiber 3-4-2 in a ring groove, so that optical fiber is in the same circle On shape face, the beam quality of large mode field optical fiber output laser is effectively controlled, the special package of optical fiber aqueous cold plate 2, which also ensures, to be led The heat-conducting effect long-term reliability of hot silicone grease makes high-capacity optical fiber laser stability with higher and reliability；It is good The collocation of heat dissipation optical fiber aqueous cold plate 2 and refrigeration compressor 5 is high-power output using excellent refrigerating function is provided for device Provide guarantee；Finally obtain the 1940nm laser of the high-output power of 300W；

The 1940m optical fiber laser of other structures is difficult due to the limitation of structure and heat dissipation up to high-power output；

The design of the low position reflective grid 3-5, the welding of high quality and reasonable heat dissipation optical fiber aqueous cold plate 2 in present embodiment With coolant refrigeration equipment, make the optical fiber laser of the 1940nm thulium-doped all-fiber laser device 3 and other structures in present embodiment It compares, there is output power height, high conversion efficiency, easy to use, energy to concentrate, it can will be in semiconductor laser 3-1 sending The light of a length of 790 ± 3nm of cardiac wave is converted into the laser of 1940nm, and uniform heat distribution, has high stability, low-heat effect It answers, Wavelength stabilized, high conversion efficiency, the features such as transfer efficiency is more than 60%, and peak power is high, makes present embodiment that there is 5W- 300W high-power output；Realize 96% efficient output and the 1940nm laser output of current highest 300W；Solve other The problems such as structured optical fiber laser fusing point is burnt, and device is burnt, and light power is not high, and wavelength is unstable；

If the laser is used in medical applications, do not need cumbersome and bulky laser light source be obtained with it is non- Often high power and good rubble, the effect of resection organization.

Specific embodiment two, unlike specific embodiment one, an annular is carved in 2 upper surface of optical fiber aqueous cold plate Slot,

First thulium doped fiber 3-4-1 and the second thulium doped fiber 3-4-2 is coiled in annular groove,

Heat-conducting medium is filled in annular groove,

2 lower surface of optical fiber aqueous cold plate is evenly distributed with the refrigerator pipes of coolant refrigeration equipment；

The structure of remaining laser and connection relationship are same as the specific embodiment one,

It originally is a possibility that embodiment only provides during a kind of operation and realization, the first thulium doped fiber 3-4-1 and the Two thulium doped fiber 3-4-2 collectively constitute thulium doped fiber 3-4, and thulium doped fiber 3-4 coiling can have optical fiber phase mutual respect in annular groove Folded part,

From the point of view of heat dissipation effect, it is clear that thulium doped fiber 3-4 is not overlapped better heat-radiation effect when being placed in annular groove,

Present embodiment only provides a kind of possibility of implementation, and also laser can also be real in the case that thulium doped fiber 3-4 is overlapped It is existing,

Working principle and process are same as the specific embodiment one,

The shape of annular groove is also not fixed simultaneously, can also be ellipse etc., real as long as can uniformly fix thulium doped fiber 3-4 Now the shape with the slot of present embodiment same effect should all be within the scope of protection of this application.

Specific embodiment three illustrates present embodiment below with reference to Fig. 2 and Fig. 3:

Present embodiments provide for the medical devices based on 1940nm thulium-doped all-fiber laser device, including driving equipment, electricity Source conversion module, the second fiber output head, fiber coupling attachment device 4 and medical optical fiber,

The driving signal output end of the driving equipment driving signal input and reversing pump with semiconductor laser 3-1 simultaneously The driving signal input of Pu laser 3-7 connects, and driving equipment is the laser driver device of the prior art,

The voltage input end and mains supply of power conversion module are connected,

The voltage output end of power conversion module swashs with the voltage input end and backward pumping of semiconductor laser 3-1 simultaneously The voltage input end of light device 3-7 connects,

The light incident side of medical optical fiber is placed in the second fiber output head, and the second fiber output head is placed in fiber coupling connection The coupled end of device 4,

Fiber coupling attachment device 4 is used to the emergent light of 1940nm thulium-doped all-fiber laser device 3 being coupled into medical optical fiber In；

Semiconductor laser 3-1, backward pumping laser 3-7, driving equipment, power conversion module and coolant refrigeration equipment Refrigerator pipes simultaneously be placed in semiconductor laser control cabinet 1；

Wherein, being encapsulated in coolant refrigeration equipment in semiconductor laser control cabinet 1 is semiconductor laser 3-1, reversing pump Pu laser 3-7, driving equipment and power conversion module are not that all refrigerator pipes of coolant refrigeration equipment are encapsulated in and partly lead In body laser control cabinet 1, some is 1940nm thulium-doped all-fiber laser device 3,

Fiber coupling attachment device 4 includes two groups of connectors,

Every group of connector respectively includes a three-dimensional trim holder and a fixed frame,

Fixed frame includes two blocks of orthogonal plates,

One block of plate is provided with the holding holes that through-thickness penetrates,

The end that is conditioned of another block of plate and three-dimensional trim holder connects,

Two groups of connectors are arranged in mirror symmetry, adjacent, and the two holding holes faces that are conditioned end of two three-dimensional trim holders,

First holding holes clamp the first fiber output head, and the second folder is directed toward in the fiber end face direction of passive fiber light exit side Hole is held,

Second holding holes clamp the second fiber output head, and the first folder is directed toward in the fiber end face direction of medical optical fiber light incident side Hole is held,

And two fiber end faces of medical optical fiber and passive fiber are staggeredly opposite, the extended line of medical optical fiber and passive fiber Extended line is in oblique 8 ° placements；

The distance between medical optical fiber light-incident end and passive fiber light exit side face are L≤0.2mm,

The core diameter of medical optical fiber is 200 μm, and cladding diameter is 220 μm；The parameter of medical optical fiber, which provides, only to be provided One is embodiments, but are not limited to only the medical optical fiber of such model, the doctor realized by the structure or principle of the present apparatus Treating device should all be within protection scope；

Wherein, fixed frame is "L" shaped fixed frame, and the present embodiment only gives a kind of embodiment party of "L" shaped fixed plate The replacement of formula, any prior art that can reach same effect should all be within the scope of protection of this application；

The structure that fiber coupling attachment device 4 provides only gives a kind of embodiment, can reach the existing of same effect Technology should all be within the scope of protection of this application；

Present embodiment couples place, the extended line of medical optical fiber and prolonging for passive fiber with passive fiber using medical optical fiber Long line is in oblique 8 ° placements, and the reason of light exit side face of medical optical fiber is placed is Laser feedback in order to prevent, but as long as guaranteeing doctor Treating the output optical fiber of optical fiber and thulium-doped all-fiber laser device 3, face does not achieve the purpose that prevent Laser feedback, it is any can The positional relationship for reaching the optical fiber of same effect, should all be within the scope of protection of this application；

The core diameter of medical optical fiber is 200 μm, and cladding diameter is 220 μm；Using 200/220 μm, (200/220 μm is light Common Parameters expression way in fine technology indicates that the core diameter of optical fiber is 200 μm, and cladding diameter is 220 μm) big numerical aperture The output of diameter guarantees the stabilization of output power, the optical fiber of 2cm -3cm can be consumed after each rubble；

3 structure of 1940nm thulium-doped all-fiber laser device and advantage are as described in specific embodiment one, structure chart such as Fig. 1 institute Show,

Operation principle and process explanation:

The central wavelength of common semiconductor laser 3-1 and backward pumping laser 3-7 are near 790nm, error model About 3nm is enclosed, the central wavelength used during present embodiment is 792nm or 793nm；Working process and principle are all the same；

The working principle of 1940nm thulium-doped all-fiber laser device 3 is as described in specific embodiment one；

The medical device of present embodiment is mainly used in smashing in calculus or cutting tissue, therefore it is full 1940nm need to be mixed thulium The outgoing of optical fiber laser 3 is optically coupled into 200/220 μm of medical optical fiber, is carried out by 200/220 μm of medical optical fiber Rubble, other existing medical devices are usually Lens Coupling mode, need to focus laser using 2 to 4 focus lamps To in 200 μm of medical optical fiber, and need to fix multiple lens, using inconvenience, it is easy to change coupling in using and transporting Output power after conjunction causes device volume big, and structure is complicated；

The method for being added without lens using direct-coupling in present embodiment, will by fiber coupling attachment device 4 The outgoing of 1940nm thulium-doped all-fiber laser device 3 is optically coupled into 200/220 μm of medical optical fiber, and coupling mechanism structure is as schemed Shown in 3, two SM905 fiber output heads are fixed on "L" shaped fixed frame, and two optical fiber outputs first defeated for the first optical fiber Lift one's head, another is the second fiber output head of fixed medical optical fiber, and the core diameter of passive fiber is 25 μm, and numerical aperture is NA=0.1, the core diameter of medical optical fiber are 200 μm, numerical aperture NA=0.22, by needing known to test by two light Completely the laser coupled of 1940nm can be entered in medical optical fiber when fine end face proximity distance L≤0.2mm；By with hand The knob of three-dimensional trim holder is adjusted, three-dimensional trim holder has the function of three-dimensional adjustment, i.e., X-axis, Y-axis in three-dimensional trim holder itself It is adjusted with three directions of Z axis, respectively the front and rear, left and right of three-dimensional trim holder and up and down direction, makes two optical fiber edge respectively Three adjustment direction, that is, X-axis of three-dimensional trim holder, Y-axis or Z axis directions arbitrarily move, by the right up and down of two optical fiber Together, but two fiber end faces have inclination angle not face, and coupling efficiency reaches highest when at a distance of 0.2mm, and efficiency is greater than 90%, The position of passive fiber and medical optical fiber is fixed, and is no longer moved；

Position can be carried out medical rubble by the output of medical optical fiber after adjusting or cut the work of tissue；

Medical device has the output of both of which, selects mould by the scheme control key on semiconductor laser control cabinet 1 Formula, and then the mode of 3 emergent light of 1940nm thulium-doped all-fiber laser device is adjusted by driving equipment realization, it is divided into continuous It is coupled with the 1940nm laser of pulse both of which, output by fiber coupling attachment device 4, is coupled into 200/220 μ The coupling efficiency of the medical optical fiber into human body of m, realization is greater than 90%；

When the optical mode out of medical device emergent light is continuous light, light power is up to 300W, repetition 1000HZ, to group The excision used time knitted is short, and bleeding is few, and the repetition for solving other structures laser is low, the not high defect of peak power；

When the optical mode out of medical device emergent light is pulsed light, repetition 50HZ can be carried out different calculus fine Smash, fuel factor is greatly reduced compared with the laser of other structures, reduces the complexity of equipment, including refrigeration is set Standby, driving power brings convenience to practical application；

The advantage and effect of the present apparatus illustrate:

The medical device of present embodiment solves the problems, such as stability and volume using all-fiber structure design, is curing Treatment field especially laser lithotripsy and soft tissue excision aspect have the meaning across the epoch；

This medical device cuts tissue by 1940nm high power continuous laser, absorbs since 1940nm belongs to water Wave band has the features such as effect is fast, and haemostatic effect is good for cutting tissue, while the wave band is special for also having in terms of rubble Effect, the Ho.YAG laser lithotripsy that comparison market is widely applied have: operating time is short, bleeding risk is low, recovery time is short, operation wind The low advantage in danger；

So this medical device cutting damage is small, clipping time is short, is realized by the control of noise spectra of semiconductor lasers 3-1 The effect of rubble is realized in the high-power pulse output of 1940nm, and powdered is more preferable, and the time is shorter, and both of which one key switching makes With conveniently；

The 1940m optical fiber laser of other structures is extremely difficult to so high power due to the limitation of structure and heat dissipation,

For present embodiment by brand-new design laser structure, the 1940nm laser of output power 300W is pioneering, this reality Apply mode low reflective grid 3-5 is placed among two sections of thulium doped fiber 3-4, backward pumping laser 3-7 to 1940nm laser into Multi-beam semiconductor laser, can be converted into the laser of 1940nm by row amplification, realize stable 1940nm laser output；

Welding, the welding of high quality and optical fiber are carried out by each device of U.S.'s Vytran heat sealing machine to optical fiber laser The design of aqueous cold plate 2 and the low position reflective grid 3-5 exports the present apparatus with the continuous or pulse laser of 5W -300W, most High-power reachable 300W, stable structure, low thermal effect, energy is concentrated, Wavelength stabilized, can reach 60% or more high conversion effect Rate, it is easy to use, it solves other structures optical fiber laser fusing point and burns, device is burnt, and light power is not high, and wavelength is unstable The problems such as；Make its do not needed in medical applications cumbersome and bulky laser light source be obtained with very high power and Good rubble, the effect of resection organization；

Direct-coupling may be implemented in medical device in present embodiment in coupling process, and lens are not added completely, reaches 90% or more high coupling efficiency, with other coupled modes ratios, structure is simple, small in size, easy to remove and operation, reduces Mirror holder changes the influence to coupling, and maintenance and use are very convenient；

Present embodiment is 5 copper tube refrigeration of refrigeration compressor, and compared to water cooling, temperature is more stable, and volume is smaller；This implementation In mode the system of heat dissipation in need surrounded by copper pipe, good temperature control can use that light is more stable, and effect is more Add obvious；And water cooling needs replacing water tank, and water pipe can generate corrosion, body to metal and plastics after long-time use Product is big and using complicated.

Therefore, the utility model should not be limited to absolutely the specific embodiment being described above, but can with It is appropriately modified in the range of attached claim and its equivalent program；

Certainly, above description is not limitation of the utility model, and the utility model is also not limited to the example above, this skill The variations, modifications, additions or substitutions that the those of ordinary skill in art field is made in the essential scope of the utility model, also belong to In the protection scope of the utility model.

Claims (10)

1.1940nm thulium-doped all-fiber laser device, it is characterised in that: including semiconductor laser (3-1), bundling device (3-2), height Reflective grid (3-3), the first thulium doped fiber (3-4-1), the second thulium doped fiber (3-4-2), low reflective grid (3-5), reversed bundling device (3-6), backward pumping laser (3-7), cladding light stripper (3-8), the first fiber output head, optical fiber aqueous cold plate (2) and cold Matchmaker's refrigeration equipment,

The central wavelength of semiconductor laser (3-1) is 790 ± 3nm,

The emergent light of semiconductor laser (3-1) through in the incident supreme reflective grid (3-3) of bundling device (3-2),

High reflective grid (3-3) are 1.94 μm of reflective grid of height,

The emergent light of high reflective grid (3-3) is incident in low reflective grid (3-5) through the first thulium doped fiber (3-4-1),

Low reflective grid (3-5) are 1.94 μm of low reflective grid；

The emergent light of low reflective grid (3-5) is incident in reversed bundling device (3-6) through the second thulium doped fiber (3-4-2),

High reflective grid (3-3), the first thulium doped fiber (3-4-1), the second thulium doped fiber (3-4-2) and low reflective grid (3-5) composition Resonant cavity,

Backward pumping laser (3-7) provides the excitation energy for resonant cavity, and the central wavelength of backward pumping laser (3-7) is 790 ± 3nm,

The emergent light of backward pumping laser (3-7) is incident in resonant cavity through reversed bundling device (3-6),

The emergent light of resonant cavity is incident in cladding light stripper (3-8) by reversed bundling device (3-6),

The emergent light of cladding light stripper (3-8) is emitted through passive fiber, and the light exit side of passive fiber is fixed on the first optical fiber In export head；

Optical fiber aqueous cold plate (2) is used to radiate for the first thulium doped fiber (3-4-1) and the second thulium doped fiber (3-4-2),

Coolant refrigeration equipment is used to be optical fiber aqueous cold plate (2), bundling device (3-2), Gao Fanguang grid (3-3), the first thulium doped fiber (3- 4-1), the second thulium doped fiber (3-4-2), low reflective grid (3-5), reversed bundling device (3-6), semiconductor laser (3-1) and anti- It radiates to pump laser (3-7).

2. 1940nm thulium-doped all-fiber laser device according to claim 1, it is characterised in that: table on optical fiber aqueous cold plate (2) Multiple diameters not equal annular groove is carved in face, and multiple annular grooves are arranged concentrically,

First thulium doped fiber (3-4-1) and the second thulium doped fiber (3-4-2) one by one uniformly coiling in annular groove,

And annular groove inner fiber is not overlapped,

Heat-conducting medium is filled in annular groove,

Optical fiber aqueous cold plate (2) lower surface is evenly distributed with the refrigerator pipes of coolant refrigeration equipment.

3. 1940nm thulium-doped all-fiber laser device according to claim 1, it is characterised in that: table on optical fiber aqueous cold plate (2) An annular groove is carved in face,

First thulium doped fiber (3-4-1) and the second thulium doped fiber (3-4-2) are coiled in annular groove,

Heat-conducting medium is filled in annular groove,

Optical fiber aqueous cold plate (2) lower surface is evenly distributed with the refrigerator pipes of coolant refrigeration equipment.

4. 1940nm thulium-doped all-fiber laser device according to claim 2 or 3, it is characterised in that: on optical fiber aqueous cold plate (2) Surface size is 400mm*400mm,

The groove depth of annular groove is 1mm, groove width 1mm.

5. 1940nm thulium-doped all-fiber laser device according to claim 1,2 or 3, it is characterised in that: bundling device (3-2), High reflective grid (3-3), the second thulium doped fiber (3-4-2), low reflective grid (3-5), reversely close beam at the first thulium doped fiber (3-4-1) Device (3-6) and cladding light stripper (3-8) are both secured to optical fiber aqueous cold plate (2) upper surface.

6. 1940nm thulium-doped all-fiber laser device according to claim 4, it is characterised in that: coolant refrigeration equipment is refrigeration Compressor (5).

7. the medical device based on 1940nm thulium-doped all-fiber laser device described in claim 1,2,3 or 6, it is characterised in that: Including driving equipment, power conversion module, the second fiber output head, fiber coupling attachment device (4) and medical optical fiber,

The driving signal output end of the driving equipment driving signal input and backward pumping with semiconductor laser (3-1) simultaneously The driving signal input of laser (3-7) connects,

The voltage input end and mains supply of power conversion module are connected,

The voltage output end of the power conversion module voltage input end and backward pumping laser with semiconductor laser (3-1) simultaneously The voltage input end of device (3-7) connects,

The light incident side of medical optical fiber is placed in the second fiber output head, and the second fiber output head is placed in fiber coupling attachment device (4) coupled end,

Fiber coupling attachment device (4) is used to the emergent light of 1940nm thulium-doped all-fiber laser device (3) being coupled into medical optical fiber In.

8. the medical device according to claim 7 based on 1940nm thulium-doped all-fiber laser device, it is characterised in that: partly lead Body laser (3-1), backward pumping laser (3-7), driving equipment, the refrigerator pipes of power conversion module and coolant refrigeration equipment It is placed in semiconductor laser control cabinet (1) simultaneously.

9. the medical device of 1940nm thulium-doped all-fiber laser device according to claim 8, it is characterised in that: fiber coupling Attachment device (4) includes two groups of connectors,

Every group of connector respectively includes a three-dimensional trim holder and a fixed frame,

Fixed frame includes two blocks of orthogonal plates,

One block of plate is provided with the holding holes that through-thickness penetrates,

The end that is conditioned of another block of plate and three-dimensional trim holder connects,

Two groups of connectors are arranged in mirror symmetry, adjacent, and the two holding holes faces that are conditioned end of two three-dimensional trim holders,

First holding holes clamp the first fiber output head, and the second clamping is directed toward in the fiber end face direction of passive fiber light exit side Hole,

Second holding holes clamp the second fiber output head, and the first clamping is directed toward in the fiber end face direction of medical optical fiber light incident side Hole,

And two fiber end faces of medical optical fiber and passive fiber are staggeredly opposite.

10. the medical device according to claim 9 based on 1940nm thulium-doped all-fiber laser device, it is characterised in that:

The distance between medical optical fiber light-incident end and passive fiber light exit side face are L≤0.2mm,

The core diameter of medical optical fiber is 200 μm, and cladding diameter is 220 μm.