CN105490143A - Novel holmium laser - Google Patents
Novel holmium laser Download PDFInfo
- Publication number
- CN105490143A CN105490143A CN201610046067.8A CN201610046067A CN105490143A CN 105490143 A CN105490143 A CN 105490143A CN 201610046067 A CN201610046067 A CN 201610046067A CN 105490143 A CN105490143 A CN 105490143A
- Authority
- CN
- China
- Prior art keywords
- reflective mirror
- semi
- crystal bar
- bladder stone
- novel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052689 Holmium Inorganic materials 0.000 title claims abstract description 24
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000013078 crystal Substances 0.000 claims abstract description 43
- 229910052724 xenon Inorganic materials 0.000 claims abstract description 18
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000005499 meniscus Effects 0.000 claims abstract description 9
- 208000006568 Urinary Bladder Calculi Diseases 0.000 claims description 43
- 239000000463 material Substances 0.000 claims description 7
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical group [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08059—Constructional details of the reflector, e.g. shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08072—Thermal lensing or thermally induced birefringence; Compensation thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/163—Solid materials characterised by a crystal matrix
Abstract
The invention provides a novel holmium laser comprises a total reflective mirror, a light-gathering cavity and a semi-reflective mirror. The light-gathering cavity comprises a housing, a diffuse reflection body, a holmium laser crystal rod and a pulse xenon lamp. End surfaces on two ends of the holmium laser crystal rod are concave. The semi-reflective mirror is in a meniscus shape, and the surface close to the light-gathering cavity is a concave surface. Holmium laser spots emitted from a resonant cavity formed by the total reflective mirror, the holmium laser crystal rod and the semi-reflective mirror is relatively small in divergence angle and more circular in laser spot cross section, so that the focused laser spots are smaller and can be focused into a thinner optical fiber.
Description
Technical field
The present invention relates to medical instruments field, particularly the novel holmium laser of one.
Background technology
Bladder stone wavelength is 2100nm, by Cr, Tm, Ho:YAG laser crystal is produced by xenon flash lamp pumping, because Bladder stone wavelength is on the absworption peak of water just, its energy by the moisture efficient absorption in tissue, so medically there is great using value, can be mainly used in calculus and pulverizes and organize the fields such as cutting at present.The basic structure of holmium laser comprises total reflective mirror, laser pump cavity, semi-reflective mirror, and laser pump cavity comprises Bladder stone crystal bar, xenon flash lamp, and wherein Bladder stone crystal bar, total reflective mirror and semi-reflective mirror constitute a resonant cavity.
Total reflective mirror in existing holmium laser, semi-reflective mirror all adopt plane minute surface, make, hot spot cross section comparatively large from the Bladder stone hot spot angle of divergence of resonant cavity outgoing circle, focus on after hot spot larger and major axis that is oval hot spot is longer, such that hot spot is more difficult to be focused in thinner optical fiber.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of novel holmium laser, comprising: total reflective mirror, laser pump cavity, semi-reflective mirror; Described laser pump cavity comprises shell, diffuse reflector, Bladder stone crystal bar, xenon flash lamp, and the end face at the two ends of described Bladder stone crystal bar is concave surface; Described semi-reflective mirror is meniscus shaped and the minute surface of close described laser pump cavity is concave surface.The Bladder stone hot spot angle of divergence of resonant cavity outgoing formed from the total reflective mirror this novel holmium laser, Bladder stone crystal bar, semi-reflective mirror is less, hot spot cross section is round, thus hot spot after focusing on is less, also just can focus in thinner optical fiber.
In order to reach above-mentioned technique effect, concrete technical scheme provided by the invention is:
A kind of novel holmium laser, comprising: total reflective mirror; Laser pump cavity, comprise shell, diffuse reflector, Bladder stone crystal bar, xenon flash lamp, described diffuse reflector comprises support tube, diffuse reflector, described diffuse reflector is placed between described support tube, shell, described Bladder stone crystal bar, xenon flash lamp axially across described support tube and the two ends of described Bladder stone crystal bar, xenon flash lamp supported by described shell, the end face at the two ends of described Bladder stone crystal bar is concave surface; Semi-reflective mirror, described semi-reflective mirror is meniscus shaped; Described total reflective mirror is placed in the side of described laser pump cavity, and described semi-reflective mirror is placed in the opposite side of described laser pump cavity, and described semi-reflective mirror is concave surface near the minute surface of described laser pump cavity.
Preferred as such scheme, described total reflective mirror, Bladder stone crystal bar, semi-reflective mirror form resonant cavity, and the length range of described resonant cavity is 260-320mm.
Preferred as such scheme, described support tube is glass tube, and the material of described diffuse reflector is barium sulfate powder.
Preferred as such scheme, described shell comprises barrel-type casing, end cap, described barrel-type casing is arranged at outside described diffuse reflector, the two ends of described Bladder stone crystal bar, xenon flash lamp are arranged on described end cap respectively, and described end cap is arranged at the two ends of described barrel-type casing in order to realize external seal in described laser pump cavity.
Preferred as such scheme, the material of described shell is metal.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of a kind of novel holmium laser provided by the invention;
Fig. 2 is the structural representation of laser pump cavity in Fig. 1;
The dispersion angle θ 1 that Fig. 3 (a) is the two ends of Bladder stone crystal bar and the two sides of semi-reflective mirror to be occurred when being all planes;
Fig. 3 (b) is the dispersion angle θ 2 that the two ends of Bladder stone crystal bar in the present invention are concave surface, semi-reflective mirror occurs when being meniscus shaped.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it will be appreciated that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward " they be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " setting " should be interpreted broadly, and such as, can be fixedly linked, arrange, also can be removably connect, arrange, or connect integratedly, arrange.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
As shown in Figure 1 and Figure 2, the invention provides a kind of novel holmium laser, comprising:
(1) total reflective mirror 1;
(2) laser pump cavity 2, comprise shell 21, diffuse reflector 22, Bladder stone crystal bar 23, xenon flash lamp 24, described diffuse reflector comprises support tube, diffuse reflector, described diffuse reflector is placed between described support tube, shell, described Bladder stone crystal bar, xenon flash lamp axially across described support tube and the two ends of described Bladder stone crystal bar, xenon flash lamp supported by described shell, the end face (R2, R3) at the two ends of described Bladder stone crystal bar is in concave surface;
(3) semi-reflective mirror 3, described semi-reflective mirror is meniscus shaped;
Described total reflective mirror 1 is placed in the side of described laser pump cavity 2, and described semi-reflective mirror 3 is placed in the opposite side of described laser pump cavity 2, and described semi-reflective mirror is concave surface near the minute surface R4 of described laser pump cavity.
The operation principle of a kind of novel holmium laser provided by the invention: xenon flash lamp under the effect of high-tension electricity luminous diffuse reflector reflected illumination in laser pump cavity on Bladder stone crystal bar, atom in Bladder stone crystal bar becomes instability or active state absorb energy from xenon flash lamp after, stable state is returned to after the atom of these instability is with their energy of the form of photon release, other atoms of d/d photon excitation and identical photo emissions, cause a series of chain reaction (this process is stimulated radiation).Photon moves back and forth and During laser emission is amplified in the resonant cavity that there are total reflective mirror and semi-reflective mirror in two ends, when most of atom become in crystal bar active after, will from semi-reflective mirror side injection resonant cavity.
The end face at the two ends of the Bladder stone crystal bar in a kind of novel holmium laser provided by the invention is concave surface, semi-reflective mirror is meniscus shaped, described semi-reflective mirror is concave surface near the minute surface of described laser pump cavity, make that the Bladder stone hot spot angle of divergence of this novel holmium laser outgoing is less, hot spot cross section is round, thus focus on after hot spot less, also just can focus in thinner optical fiber.Because for the laser that is determined, its total dispersion angle θ fixes, and the spot diameter d0 after the condenser lens being f by focal length focuses on can think approx:
d0＝f*θ
Wherein θ is the angle of divergence radian value of laser emitting light; F is the focal length of condenser lens.
As can be seen from above-mentioned formula, when focal length is constant, if dispersion angle is less, then spot diameter is less, so hot spot is less after focusing on.
The main cause producing dispersion angle is: after Bladder stone crystal bar absorbs energy, major part energy is converted to heat, small part is only had to change into light, if when so this Bladder stone crystal bar absorbing rapidly heat is operated in low frequency, heat can be pulled away, but when high frequency, heat does not also come anxious taking away just has carried out energy excitation bright dipping next time, such heat has broken original balance, define a new balance, this balance makes the non-uniform temperature of Bladder stone crystal bar, Bladder stone crystal bar generates heat but generates heat uneven, due to central axis concentration of energy, energy away from central shaft is little, result in Bladder stone crystal bar owing to expanding with heat and contract with cold, define thermal lensing effect, the both ends of the surface of Bladder stone crystal bar are made to be convex surface, such light is horn scattering when penetrating in Bladder stone crystal bar, in this invention, the two ends of Bladder stone crystal bar are concave surface, semi-reflective mirror is meniscus shaped, rightly above-mentioned thermal lensing effect is compensated, thus dispersion angle is reduced.As shown in Fig. 3 (a), when the two ends of Bladder stone crystal bar and the two sides of semi-reflective mirror are all planes, dispersion angle is θ 1, as shown in Fig. 3 (b), when the two ends of Bladder stone crystal bar be concave surface, semi-reflective mirror time that is meniscus shaped institute's dispersion angle is θ 2, when other conditions are all the same, θ 2< θ 1 can be found out.
Further, described total reflective mirror, Bladder stone crystal bar, semi-reflective mirror form resonant cavity, and the length L scope of described resonant cavity is 260-320mm, and the scope of the length L in the R4 face namely from the R1 face of total reflective mirror to semi-reflective mirror is 260-320mm.The distance of this scope makes the angle of divergence of emergent light spot less, and optical quality is better.
Further, described support tube is glass tube, and the material of described diffuse reflector is barium sulfate powder.The support tube of coloured glaze material not only ensure that the cavity body structure of laser pump cavity with outside diffuse reflector but also makes diffuse effect better.
Further, described shell 21 comprises barrel-type casing 211, end cap 212, described barrel-type casing 211 is arranged at outside described diffuse reflector 22, the two ends of described Bladder stone crystal bar 23, xenon flash lamp 24 are arranged on described end cap 212 respectively, and described end cap 212 is arranged at the two ends of described barrel-type casing 211 in order to realize external seal in described laser pump cavity.Knockdown shell mechanism makes shell conveniently assemble and disassemble.
Further, the material of described shell 21 is metal.The shell of metal material makes its barrier propterty better.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (5)
1. a novel holmium laser, is characterized in that, comprising:
Total reflective mirror;
Laser pump cavity, comprise shell, diffuse reflector, Bladder stone crystal bar, xenon flash lamp, described diffuse reflector comprises support tube, diffuse reflector, described diffuse reflector is placed between described support tube, shell, described Bladder stone crystal bar, xenon flash lamp axially across described support tube and the two ends of described Bladder stone crystal bar, xenon flash lamp supported by described shell, the end face at the two ends of described Bladder stone crystal bar is concave surface;
Semi-reflective mirror, described semi-reflective mirror is meniscus shaped;
Described total reflective mirror is placed in the side of described laser pump cavity, and described semi-reflective mirror is placed in the opposite side of described laser pump cavity, and described semi-reflective mirror is concave surface near the minute surface of described laser pump cavity.
2. novel holmium laser according to claim 1, is characterized in that, described total reflective mirror, Bladder stone crystal bar, semi-reflective mirror form resonant cavity, and the length range of described resonant cavity is 260-320mm.
3. novel holmium laser according to claim 2, is characterized in that, described support tube is glass tube, and the material of described diffuse reflector is barium sulfate powder.
4. the novel holmium laser according to any one of claim 1-3, it is characterized in that, described shell comprises barrel-type casing, end cap, described barrel-type casing is arranged at outside described diffuse reflector, the two ends of described Bladder stone crystal bar, xenon flash lamp are arranged on described end cap respectively, and described end cap is arranged at the two ends of described barrel-type casing in order to realize external seal in described laser pump cavity.
5. novel holmium laser according to claim 4, is characterized in that, the material of described shell is metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610046067.8A CN105490143A (en) | 2016-01-25 | 2016-01-25 | Novel holmium laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610046067.8A CN105490143A (en) | 2016-01-25 | 2016-01-25 | Novel holmium laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105490143A true CN105490143A (en) | 2016-04-13 |
Family
ID=55676965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610046067.8A Pending CN105490143A (en) | 2016-01-25 | 2016-01-25 | Novel holmium laser |
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| Country | Link |
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| CN (1) | CN105490143A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060146901A1 (en) * | 2005-01-05 | 2006-07-06 | Bae Systems Information & Electronic Systems Intergration Inc. | Holmium doped 2.1 micron crystal laser |
| CN201001770Y (en) * | 2007-02-09 | 2008-01-09 | 无锡市大华激光设备有限公司 | Medical binuclear holmium laser therapeutic machine |
| CN101262113A (en) * | 2008-04-20 | 2008-09-10 | 华中科技大学 | A loop concave output mirror laser resonance cavity |
| CN202288460U (en) * | 2011-10-18 | 2012-07-04 | 无锡市大华激光设备有限公司 | Holmium laser generator |
| CN104852265A (en) * | 2015-06-10 | 2015-08-19 | 湖北工业大学 | High-efficiency holmium laser |
| CN205335614U (en) * | 2016-01-25 | 2016-06-22 | 武汉浩宏科技有限公司 | Novel holmium laser |
-
2016
- 2016-01-25 CN CN201610046067.8A patent/CN105490143A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060146901A1 (en) * | 2005-01-05 | 2006-07-06 | Bae Systems Information & Electronic Systems Intergration Inc. | Holmium doped 2.1 micron crystal laser |
| CN201001770Y (en) * | 2007-02-09 | 2008-01-09 | 无锡市大华激光设备有限公司 | Medical binuclear holmium laser therapeutic machine |
| CN101262113A (en) * | 2008-04-20 | 2008-09-10 | 华中科技大学 | A loop concave output mirror laser resonance cavity |
| CN202288460U (en) * | 2011-10-18 | 2012-07-04 | 无锡市大华激光设备有限公司 | Holmium laser generator |
| CN104852265A (en) * | 2015-06-10 | 2015-08-19 | 湖北工业大学 | High-efficiency holmium laser |
| CN205335614U (en) * | 2016-01-25 | 2016-06-22 | 武汉浩宏科技有限公司 | Novel holmium laser |
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