CN104701721B - A kind of large-power optical fiber Lasar prostate treatment system - Google Patents
A kind of large-power optical fiber Lasar prostate treatment system Download PDFInfo
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- CN104701721B CN104701721B CN201510079980.3A CN201510079980A CN104701721B CN 104701721 B CN104701721 B CN 104701721B CN 201510079980 A CN201510079980 A CN 201510079980A CN 104701721 B CN104701721 B CN 104701721B
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Abstract
The invention discloses a kind of large-power optical fiber Lasar prostate treatment system, it includes laserresonator, pumping source, gain fibre, electric-optically Q-switched device, fiber coupling lens；Wherein, the gain fibre includes gain core, gas wedge and the inner cladding, surrounding layer, enhancing coat that coat the fibre core and the gas wedge successively from inside to outside, the quantity of the gain core is more than one, the gain core and the centerline axis parallel of the gain fibre, the gas wedge is elongated strip shaped hollow structure, described gas wedge one end is located at the center of circle of the inner cladding, and the gas wedge other end is located at the edge of the inner cladding.The present invention uses special multicore gain fibre structure, fibre core is distributed into non-rotational symmetric, and special gas wedge design breaks the circular symmetry of optical fiber, the power limit for the optical fiber laser for having overcome root fibre core single, the pumping efficiency of laser is increased, greatly improves laser output power.
Description
Technical field
The present invention relates to fiber laser technology field, more particularly to a kind of large-power optical fiber Lasar prostate treatment system
System.
Background technology
Benign prostate hyperplasia (benign prostatic hyperplasia, BPH) patient is the normal of elderly men
See frequently-occurring disease, and its incidence gradually increases with advancing age, to being more than 50% at 60 years old, is more up to 83.3% within 80 years old.
There is numerous patients to be badly in need for the treatment of in worldwide, exploitation medical apparatus for treating prostatic diseases is very promising and significant apparent.
At present, Transurethral prostatic electroresection A is still considered as the goldstandard of minimally-invasive treatment BPH, but its postoperative easily bleeding, cutting occurs
The severe complications such as syndrome.
The absworption peak 1.94um of the very close water of 2 mu m wavebands, its absorptivity to water are 4 times of Bladder stone, its dozen exists
The solidification layer for the 0.4-0.6 millimeters that tissue is formed is minimum to tissue injury, so be considered as optimal prostate treatment
Wave band.Thulium-doped fiber laser exports 1.94 μm of laser, it is with respect to for solid state laser, and efficient, heat dissipation characteristics are good, output
The characteristics such as laser beam quality height, the thulium optical fiber laser of high peak power pulse output is already as prostate Minimally Invasive Surgery
Most ideal laser type.
2um tissue by laser, which such as is cut, gasified at the operation, needs larger pulse energy.The laser work(of optical fiber laser
Rate is mainly provided by laser fibre core, and the optical fiber laser of single fibre core is due to factors such as its core cross sections product, nonlinear effects
Limitation, the power density of its fibre core have the upper limit, are extremely difficult to 0.5W/ μm2More than, so it is generally necessary to increasing fiber core
Diameter to increase optical fiber laser output power, but the nonlinear effect of the optical signal due to output, optical signal can be made
Distortion, and the laser energy increased concentrates in single-core fiber and is not easy to spread, and serious fuel factor also easily occurs, these certainly will lead
The beam quality of optical fiber laser output is caused to be deteriorated, this is unfavorable for laser surgey.
The content of the invention
It is excellent it is an object of the invention to solve at least the above and/or defect, and provide at least to will be described later
Point.
It is a still further object of the present invention to provide a kind of large-power optical fiber Lasar prostate treatment system, it can solve list
The beam quality compromises that core fibre laser occurs to increase power, and more fibre cores in covering surround gas wedge Cheng Fei
Rotationally symmetrical distribution, improves the probability that pump light passes through gain core, so as to greatly increase the pumping efficiency of laser, is ensureing
On the premise of preferable beam quality, the power output of higher is realized.
In order to realize these purposes and further advantage according to the present invention, there is provided a kind of large-power optical fiber Lasar prostate
Treatment system, it includes：
Laserresonator, it includes total reflective mirror and outgoing mirror of the central axis on laser optical path, to select certain frequency
Rate and the light moved along resonator axis, and it is amplified；
Pumping source, it is located at the laser resonance intracavitary, to make laser working medium form population inversion；
Gain fibre, the light that its absorptive pumping system is sent, the laser of output 1940 ± 60nm wavelength；
Electric-optically Q-switched device, it includes the polarizer and electro-optic Q-switched crystal, to by the energy compression of the laser to width
In extremely narrow pulse, the huge pulse wave of laser is exported；
Fiber coupling lens, its to by laser coupled into the gain fibre；
Wherein, the gain fibre includes gain core, gas wedge and coats the fibre core and the gas successively from inside to outside
The inner cladding of wedge, surrounding layer, enhancing coat, the quantity of the gain core are more than one, the gain core with it is described interior
The centerline axis parallel of covering, the gas wedge are elongated strip shaped hollow structure, and described gas wedge one end is located at the circle of the inner cladding
The heart, the gas wedge other end are located at the edge of the inner cladding.The design of multicore fiber laser adds the effective of fibre core
Area, effectively increases such as stimulated Raman scattering and the threshold power of stimulated Brillouin scattering lamp nonlinear effect, can protect
On the premise of demonstrate,proving preferable beam quality, the output power of high power fiber laser is further lifted.In addition, special gas wedges
Meter has broken the circular symmetry of optical fiber so that the skew ray propagated originally in inner cladding with helical manner, by gas wedge
After reflection or refraction can bigger possibly pass through gain core, so as to substantially increase the pumping efficiency of laser, lifting is sharp
Light device output power.
Preferably, the quantity of the gain core is five, and five gain cores are on the gas wedge both ends
The equidistant symmetric arrays of line, to improve the ratio of same-phase pattern in multicore optical fiber laser output power, so that it is guaranteed that more
Good beam quality.Although increasing for fibre core number can increase total output power, core number is more, the coupling of same-phase pattern
It is lower to close efficiency, in the present invention, since gas wedge design significantly improves the pumping efficiency of laser, only five gains need to be set
Fibre core is with regard to that can meet the needs of high power laser medical apparatus for treating prostatic diseases surgical cut, and the coupling effect of five fibre core same-phase patterns
Rate is high, and obtained laser facula is small, and energy density is high, can effectively assemble on prostata tissue, so as to produce optimal tissue
Vaporization effect.
Preferably, wherein, the gain core is uniformly to mix the quartz glass cylinder of thulium, the gain core it is a diameter of
25um, numerical aperture 0.09, the spacing of the gain core are 2~2.5 times of the gain core diameter.Core diameter is got over
Big emergent light is stronger, but can cause increasing for model number with the increase of core diameter, is unfavorable for coherently combined, comprehensive each factor
Consider, the suitable core diameter and numerical aperture that the present invention uses, and on this condition, regular fibre core is effectively arranged
Cloth, effectively increases the coupling efficiency between different laser beams in transmitting procedure.
Preferably, wherein, the gain core mixes thulium concentration for 4 × 1024~6 × 1024m-3, through 798nm wavelength
After pump light irradiation, ground state3H6On thulium ion transit to3H4On energy level, when the concentration of thulium ion reach a certain height, face
May occur between nearly thulium ion cross relaxation (3H4→3F4,3H6→3F4), a pumping source photon can be by two thulium ions
It is energized into3F4Level, finally3F4Thulium ion in level transits to the photon that ground state sends 2um or so.Cross relaxation phenomenon can be real
The reduction of existing laser threshold and the increase of the laser gain factor, effectively improve the efficiency of laser.The increase of thulium ion can
To strengthen this cross relaxation phenomenon, but thulium ion is excessive and can cause the appearance of ion cluster, and 4 are adulterated in gain fibre of the present invention
×1024~6 × 1024m-3Thulium can obtain higher lasing efficiency.
Preferably, wherein, the total reflective mirror surface is coated with the film that is all-trans of 1940nm, and the outgoing mirror is reflection kernel ripple
The fiber grating of a length of 1940nm, transmissivity of the fiber grating in the range of 1940 ± 60nm are 20~40%.It is described complete
The central axis of anti-mirror and fiber grating is located on laser optical path, and the photon of 1940nm is between total reflective mirror and fiber grating along axis
Line movement carries out back and forth movement and produces vibration, and is progressively strengthened, and the light of other wavelength is reflected to outside axis and overflows quickly
Go out outside chamber and be inhibited, by controlling the suitable light transmittance of outgoing mirror fiber grating, the feedback to laser beam and acquisition can be formed
Laser exports, so as to obtain optimal output power.
Preferably, wherein, the pumping source is the semiconductor laser array that output wavelength is 798nm, to excite
State the light that gain fibre sends 1940nm, the pumping source by pump optical fiber combiner be fused to the multicore gain fibre into
Row pumping, the pump optical fiber combiner are conducive to high-power coupling pump light and enter gain fibre, reduce what device produced
Heat, so as to complete powerful pumping.
Preferably, wherein, the fiber coupling lens include the first fiber coupling lens, the second fiber coupling lens,
3rd fiber coupling lens, the focus of first fiber coupling lens are located at the first endface of the multicore gain fibre, institute
The focus for stating the second light coupled lens is located at the breech face of the gain fibre, the focus of the 3rd fiber coupling lens
At the left side of the outgoing mirror, the fiber coupling lens surface is plated with the anti-reflection film of 1940nm, and the coupling is saturating
Mirror is used to improve laser coupled into the efficiency of optical fiber.
Preferably, wherein, thermal depolarization compensation device is further included, it is located at the total reflective mirror and first coupled lens
Between, to compensate in superpower laser, since the pump power density in gain media significantly increases the thermal effect of appearance
Should, caused by resonance cavity loss.
Preferably, wherein, polarization-maintaining Cladding Power Stripper is further included, it is coated on the tail end of the gain fibre, institute
It is 20~30db to the dough softening of transmission light in the inner cladding to state polarization-maintaining Cladding Power Stripper, and extinction ratio is more than 18db, from
And remove remaining pump light in covering and the ASE transmitted in inner cladding is leaked to from fibre core, reduce the damage to subsequent device.
The present invention includes at least following beneficial effect：
(1) present invention adds the effective area of fibre core, effectively improves due to using special multicore gain fibre structure
Such as stimulated Raman scattering and the threshold power of stimulated Brillouin scattering lamp nonlinear effect, it is thus possible to overcome single fibre core
Optical fiber laser power limit, can further lift large-power optical fiber laser on the premise of preferable beam quality is ensured
The output power of device；
(2) fibre core of the gain fibre in the present invention is distributed into non-rotational symmetric, and special gas wedge design breaks optical fiber
Circular symmetry so that the skew ray propagated originally in inner cladding with helical manner, the energy after the reflection or refraction of gas wedge
Enough biggers possibly pass through gain core, so that the pumping efficiency of laser is substantially increased, improving laser device output power；
(3) present invention is designed using multicore gain fibre, is avoided concentration diffusion of the heat radiation in single-core fiber, is improved
The efficiency of thermal diffusion, this outer gas wedge design also increase the efficiency of pumping, this also reduces fuel factor to a certain extent
Produce, improve the output power and beam quality of laser；
(4) multicore gain fibre output terminal of the present invention is additionally provided with polarization-maintaining Cladding Power Stripper, it can ensure fibre
On the basis of the degree of polarization of core output light, power, beam quality, the residual pump light that is transmitted in covering is dispelled significantly and from fibre core
In be leaked to the amplified spontaneous emission light of covering, so as to greatly reduce the infringement to subsequent device.
Brief description of the drawings
Fig. 1 is the structure diagram of the large-power optical fiber Lasar prostate treatment system of the present invention；
Fig. 2 is the schematic cross-section of multicore gain fibre of the present invention.
In figure：1st, total reflective mirror, 2, thermal depolarization compensation device, the 3, first fiber coupling lens, 4, pumping source, 5, pumping optical fiber
Bundling device, 6, gain fibre, 7, polarization-maintaining Cladding Power Stripper, the 8, second fiber coupling lens, 9, the polarizer, 10, electric-optically Q-switched
Crystal, the 11, the 3rd fiber coupling lens, 12, outgoing mirror, 61, gain core, 62, gas wedge, 63, inner cladding, 64, surrounding layer,
65th, coat is strengthened.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text
Word can be implemented according to this.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of a other elements or its combination.
Figures 1 and 2 show that a kind of way of realization according to the present invention, it includes：
Laserresonator, it includes total reflective mirror 1 and outgoing mirror 12 of the central axis on laser optical path, and the component is selecting
Certain frequency and the light moved along resonator axis are selected, and it is amplified；
Pumping source 4, it is located at the laser resonance intracavitary, and the component is anti-to make laser working medium form population
Turn；
Gain fibre 6, the light which sends to its absorptive pumping system, the laser of output 1940 ± 60nm wavelength；
Electric-optically Q-switched device, it includes the polarizer 9 and electro-optic Q-switched crystal 10, and the component is to by the energy pressure of the laser
It is reduced in the extremely narrow pulse of width, exports the huge pulse wave of laser.Also, the polarizer 9 includes a variety of ways of realization, such as the polarizer can
With selected from Glan prism, have dichroism crystal or in Brewster angle place white stone eyeglass heap in one kind.Electric light
Adjusting Q crystal 10 also includes a variety of ways of realization, such as electro-optic Q-switched crystal 10 can be selected from High-doped Magnesium LiNbO_3 Crystal or gallium silicate
One kind in lanthanum crystal.
Fiber coupling lens, the component to by laser coupled into the gain fibre 6；
Wherein, the gain fibre 6 includes gain core 61, gas wedge 62 and coats the gain fibre successively from inside to outside
The inner cladding 63 of core 61 and the gas wedge 62, surrounding layer 64, enhancing coat 65, the quantity of the gain core 61 are more than one
A, the centerline axis parallel of the gain core 61 and the inner cladding 63, the gas wedge 62 is elongated strip shaped hollow structure, institute
The center of circle that 62 one end of gas wedge is located at the inner cladding 63 is stated, 62 other end of gas wedge is located at the edge of the inner cladding 63.
In this technical solution, the design of multicore fiber laser adds the effective area of gain core 61, has
Effect improves such as stimulated Raman scattering and the threshold power of stimulated Brillouin scattering lamp nonlinear effect, can ensure preferable light
On the premise of beam quality, the output power of high power fiber laser is further lifted.In addition, the special design of gas wedge 62 is broken
The circular symmetry of optical fiber so that the skew ray propagated originally in inner cladding 63 with helical manner, by the anti-of gas wedge 62
After penetrating or reflecting can bigger possibly pass through gain core 61, so as to substantially increase the pumping efficiency of laser, lifting swashs
Light device output power.
A kind of implementation of gain core 61 in such scheme is：The quantity of the gain core 61 is five, institute
State line equidistant symmetric arrays of five gain cores 61 on 62 both ends of gas wedge, to improve multicore optical fiber laser and
The ratio of same-phase pattern in amplifier output power, so that it is guaranteed that more preferable beam quality.Although increasing for fibre core number can
To increase total output power, but core number is more, and the coupling efficiency of same-phase pattern is lower, in the present invention, due to gas wedge 62
Design significantly improves the pumping efficiency of laser, only need to set five gain cores 61 with regard to that can meet high power laser prostate
The needs of therapeutic equipment surgical cut, and the coupling efficiency of five 61 same-phase patterns of gain core is high, obtained laser facula is small,
Energy density is high, can effectively assemble on prostata tissue, so as to produce optimal tissue vaporization's effect.
A kind of implementation of gain core 61 in such scheme is：The gain core 61 is uniformly to mix the quartz of thulium
Glass column, a diameter of 25um of the gain core 61, numerical aperture 0.09, the spacing of the gain core 61 is the increasing
2~2.5 times of beneficial 61 diameter of fibre core.Core diameter is bigger, and emergent light is stronger, but can cause pattern count with the increase of core diameter
Purpose increases, and is unfavorable for coherently combined, and comprehensive each factor considers that the present invention uses suitable core diameter and numerical aperture, and
On this condition, effectively arranged to regular fibre core, effectively increase the coupling between different laser beams in transmitting procedure
Efficiency.
In such scheme, the gain core 61 mixes thulium concentration for 4 × 1024~6 × 1024m-3, through 798nm wavelength
After pump light irradiation, ground state3H6On thulium ion transit to3H4On energy level, when the concentration of thulium ion reach a certain height, face
May occur between nearly thulium ion cross relaxation (3H4→3F4,3H6→3F4), a pumping source photon can be by two thulium ions
It is energized into3F4Level, finally3F4Thulium ion in level transits to the photon that ground state sends 2um or so.Cross relaxation phenomenon can be real
The reduction of existing laser threshold and the increase of the laser gain factor, effectively improve the efficiency of laser.The increase of thulium ion can
To strengthen this cross relaxation phenomenon, but thulium ion is excessive and can cause the appearance of ion cluster, and 4 are adulterated in gain fibre of the present invention
×1024~6 × 1024m-3Thulium can obtain higher lasing efficiency.
A kind of implementation of laserresonator is in such scheme：The laserresonator includes central axis in laser light
Total reflective mirror 1 and outgoing mirror 12 on road, the surface of the total reflective mirror 1 are coated with the film that is all-trans of 1940nm, and the outgoing mirror 12 is anti-
Hit the fiber grating of a length of 1940nm of cardiac wave, transmissivity of the fiber grating in the range of 1940 ± 60nm for 20~
40%.The central axis of the total reflective mirror and fiber grating is located on laser optical path, and the photon of 1940nm is in total reflective mirror and optical fiber
Back and forth movement being carried out along axial-movement between grating and producing vibration, and progressively strengthened, the light of other wavelength is reflected to axis
Line is outer and quickly spills out and is inhibited outside chamber, by controlling the suitable light transmittance of outgoing mirror fiber grating, can be formed to laser beam
Feedback and obtain laser output, so as to obtain optimal output power.Also, this mode is a kind of saying for preferred embodiments
It is bright, but be not limited thereto.
A kind of implementation of pumping source 5 in such scheme is：The pumping source 5 is half that output wavelength is 798nm
Conductor Laser array, to excite the gain fibre to send the light of 1940nm, the pumping source 5 passes through pump optical fiber combiner
5, which are fused to the multicore gain fibre 6, carries out pumping, and the pump optical fiber combiner 5 is conducive to high-power coupling pump light
Into gain fibre, the heat that device produces is reduced, so as to complete powerful pumping.
A kind of implementation of fiber coupling lens in such scheme is：The fiber coupling lens include the first optical fiber
Coupled lens 3, the second fiber coupling lens 8, the 3rd fiber coupling lens 11, the focus position of first fiber coupling lens 3
In the first endface of the multicore gain fibre 6, the focus of the second light coupled lens 8 is located at the gain fibre 6
At breech face, the focus of 11 lens of the 3rd fiber coupling is located at the left side of the outgoing mirror 12, the fiber coupling
Lens surface is plated with the anti-reflection film of 1940nm, and the coupled lens are used to improve laser coupled into the efficiency of optical fiber.
Such scheme can also include thermal depolarization compensation device 2, it is located at the total reflective mirror 1 and first coupled lens
Between 3.In superpower laser, since the pump power density in gain media significantly increases, it may appear that serious thermal effect
Should, additionally, due to multi-core optical fiber radially and tangentially thermal stress change it is inconsistent variations in refractive index can be caused inconsistent, can also produce
Raw thermal birefringence effect, reduces the light light efficiency of laser, reduces output power, quality for outputting laser beam is also had very
Big influence, so need to set hot depolarization benefit device effectively to compensate it.Also, the component realizes shape including a variety of
Formula, for example, the hot depolarization compensation device can centered on wavelength for 1940nm quarter wave plate or Faraday rotator.
Polarization-maintaining Cladding Power Stripper 7 can also be further included in such scheme, it is coated on the tail of the gain fibre 6
End, the polarization-maintaining Cladding Power Stripper 7 is 20~30db to the dough softening of transmission light in the inner cladding 63, and extinction ratio is more than
18db, so as to remove remaining pump light in covering and the ASE transmitted in inner cladding is leaked to from fibre core, reduces to subsequent device
Damage.
As described above, according to the present invention, due to using special multicore gain fibre structure, add the significant surface of fibre core
Product, effectively increases such as stimulated Raman scattering and the threshold power of stimulated Brillouin scattering lamp nonlinear effect, it is thus possible to
Overcome the power limit of the optical fiber laser of single fibre core, can be on the premise of preferable beam quality be ensured, further lifting is big
The output power of power fibre lasers；
In addition, according to the present invention, since the fibre core of the gain fibre of use is distributed into non-rotational symmetric, special gas wedges
Meter breaks the circular symmetry of optical fiber so that the skew ray propagated originally in inner cladding with helical manner, by the reflection of gas wedge
Or after refraction can bigger possibly pass through gain core, so as to substantially increase the pumping efficiency of laser, improving laser device
Output power；
In addition, according to the present invention, due to being designed using multicore gain fibre, avoid collection of the heat radiation in single-core fiber
Middle diffusion, improves the efficiency of thermal diffusion, this outer gas wedge design also increases the efficiency of pumping, this is also reduced to a certain extent
The generation of fuel factor, improves the output power and beam quality of laser；
In addition, according to the present invention, peeled off since the multicore gain fibre output terminal of use is additionally provided with polarization-maintaining covering power
Device, it can dispel what is transmitted in covering significantly on the basis of the degree of polarization, power, beam quality of fibre core output light is ensured
Residual pump light and the amplified spontaneous emission light that covering is leaked to from fibre core, so as to greatly reduce the infringement to subsequent device.
Although embodiment of the present invention is disclosed as above, it is not limited in listed fortune in specification and embodiment
With it can be applied to various suitable the field of the invention completely, can be easily real for those skilled in the art
Now other modification, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited to
Specific details and shown here as the legend with description.
Claims (8)
- A kind of 1. large-power optical fiber Lasar prostate treatment system, it is characterised in that including：Laserresonator, it includes total reflective mirror and outgoing mirror；Pumping source, it is located at the laser resonance intracavitary；Gain fibre, the light that its absorptive pumping system is sent, the laser of output 1940 ± 60nm wavelength；Electric-optically Q-switched device, it includes the polarizer and electro-optic Q-switched crystal, to the energy compression of the laser to width is extremely narrow Pulse in, export laser giant-pulse；First fiber coupling lens, its to by laser coupled into the gain fibre；Wherein, the gain fibre includes gain core, gas wedge and coats the gain core and the gas successively from inside to outside The inner cladding of wedge, surrounding layer, enhancing coat, the quantity of the gain core are more than one, the gain core with it is described interior The centerline axis parallel of covering, the gas wedge are elongated strip shaped hollow structure, and described gas wedge one end is located at the circle of the inner cladding The heart, the gas wedge other end are located at the edge of the inner cladding；Wherein, the gain core is uniformly to mix the quartz glass cylinder of thulium, and the gain core mixes thulium concentration for 4 × 1024~6 ×1024m-3。
- 2. large-power optical fiber Lasar prostate treatment system as claimed in claim 1, it is characterised in that the gain core Quantity is five, line equidistant symmetric arrays of five gain cores on the gas wedge both ends.
- 3. large-power optical fiber Lasar prostate treatment system as claimed in claim 1, it is characterised in that the gain core A diameter of 25um, numerical aperture 0.09.
- 4. large-power optical fiber Lasar prostate treatment system as claimed in claim 1, it is characterised in that the total reflective mirror surface The film that is all-trans of 1940nm is coated with, the outgoing mirror is the fiber grating that reflection kernel wavelength is 1940nm, and the fiber grating exists Transmissivity in the range of 1940 ± 60nm is 20~40%.
- 5. large-power optical fiber Lasar prostate treatment system as claimed in claim 1, it is characterised in that the pumping source is defeated Go out the semiconductor laser array that wavelength is 798nm, the pumping source is fused to the gain fibre by pump optical fiber combiner Carry out pumping.
- 6. large-power optical fiber Lasar prostate treatment system as claimed in claim 1, it is characterised in that further include the second optical fiber Coupled lens and the 3rd fiber coupling lens, the focus of first fiber coupling lens are located at the head end face of the gain fibre Place, the focus of the second light coupled lens are located at the breech face of the gain fibre, the 3rd fiber coupling lens Focus be located at the left side of the outgoing mirror.
- 7. large-power optical fiber Lasar prostate treatment system as claimed in claim 1, it is characterised in that further include hot depolarization and mend Device is repaid, it is between the total reflective mirror and first coupled lens, to compensate what is occurred due to draw power increase Resonance cavity loss caused by fuel factor.
- 8. large-power optical fiber Lasar prostate treatment system as claimed in claim 1, it is characterised in that further include polarization-maintaining covering Power stripper, it is coated on the tail end of the gain fibre, and the polarization-maintaining Cladding Power Stripper in the inner cladding to passing The dough softening lost is 20~30db, and extinction ratio is more than 18db.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201126922Y (en) * | 2007-07-19 | 2008-10-01 | 天津市天坤光电技术有限公司 | High-capacity 2 [mu]m wavelength medical thulium laser |
| US8202268B1 (en) * | 2007-03-18 | 2012-06-19 | Lockheed Martin Corporation | Method and multiple-mode device for high-power short-pulse laser ablation and CW cauterization of bodily tissues |
| CN103199418A (en) * | 2013-04-11 | 2013-07-10 | 杭州镭克普光电技术有限公司 | Periodical domain reversal crystal electro-optic Q-switched-based pulse optical fiber laser |
| CN203341816U (en) * | 2013-07-16 | 2013-12-18 | 山东瑞华同辉光电科技有限公司 | Medical 2-micrometer fiber laser treatment system |
| EP2722943A1 (en) * | 2011-06-16 | 2014-04-23 | Furukawa Electric Co., Ltd. | Multicore amplifying optical fiber |
| CN204517142U (en) * | 2015-02-14 | 2015-07-29 | 苏州国科华东医疗器械有限公司 | A kind of large-power optical fiber Lasar prostate therapy system |
-
2015
- 2015-02-14 CN CN201510079980.3A patent/CN104701721B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8202268B1 (en) * | 2007-03-18 | 2012-06-19 | Lockheed Martin Corporation | Method and multiple-mode device for high-power short-pulse laser ablation and CW cauterization of bodily tissues |
| CN201126922Y (en) * | 2007-07-19 | 2008-10-01 | 天津市天坤光电技术有限公司 | High-capacity 2 [mu]m wavelength medical thulium laser |
| EP2722943A1 (en) * | 2011-06-16 | 2014-04-23 | Furukawa Electric Co., Ltd. | Multicore amplifying optical fiber |
| CN103199418A (en) * | 2013-04-11 | 2013-07-10 | 杭州镭克普光电技术有限公司 | Periodical domain reversal crystal electro-optic Q-switched-based pulse optical fiber laser |
| CN203341816U (en) * | 2013-07-16 | 2013-12-18 | 山东瑞华同辉光电科技有限公司 | Medical 2-micrometer fiber laser treatment system |
| CN204517142U (en) * | 2015-02-14 | 2015-07-29 | 苏州国科华东医疗器械有限公司 | A kind of large-power optical fiber Lasar prostate therapy system |
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