CN111106522B - Device for switching dynamic and static output of dual-mode erbium laser - Google Patents
Device for switching dynamic and static output of dual-mode erbium laser Download PDFInfo
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- CN111106522B CN111106522B CN201911291904.3A CN201911291904A CN111106522B CN 111106522 B CN111106522 B CN 111106522B CN 201911291904 A CN201911291904 A CN 201911291904A CN 111106522 B CN111106522 B CN 111106522B
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- switching
- erbium laser
- output
- switched
- erbium
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- 229910052691 Erbium Inorganic materials 0.000 title claims abstract description 87
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 230000003068 static effect Effects 0.000 title claims abstract description 25
- 229910052724 xenon Inorganic materials 0.000 claims abstract description 13
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000013078 crystal Substances 0.000 claims abstract description 9
- 230000010355 oscillation Effects 0.000 claims description 18
- 230000005494 condensation Effects 0.000 claims description 5
- 238000009833 condensation Methods 0.000 claims description 5
- 210000001519 tissue Anatomy 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003685 thermal hair damage Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 210000004087 cornea Anatomy 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 1
- 210000000515 tooth Anatomy 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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1123—Q-switching
- H01S3/121—Q-switching using intracavity mechanical devices
- H01S3/123—Q-switching using intracavity mechanical devices using rotating mirrors
-
- 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
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0085—Modulating the output, i.e. the laser beam is modulated outside the laser cavity
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The utility model discloses a device for switching dynamic and static output of dual-mode erbium laser. The Q-switched and free-oscillation erbium laser assembly is characterized in that an output light path of the Q-switched and free-oscillation erbium laser assembly is vertical, a switching component consists of a switching plate (13) which is equidistant from a rotating shaft (21) and a stepping motor (14), a reflecting mirror (19) and a through hole (20), and a photoelectric sensor (15) which is connected with the rotating shaft (21), the switching plate (13) forms an angle of 40-50 degrees with the output light path of the free-oscillation erbium laser assembly, an intersection point of the output light path of the Q-switched erbium laser assembly and the output light path of the free-oscillation erbium laser assembly is positioned on the surface of the reflecting mirror (19), xenon lamps (5, 10), a Q-switched crystal (2) in a first light cavity and a second light cavity are electrically connected with a laser power supply (16) containing the Q-switched driver, and the photoelectric sensor (15) and the stepping motor (14) are electrically connected with a monitor (18) and the monitor (18) is electrically connected with the laser power supply (16) containing the Q-switched driver. It is very easy to be widely and commercially applied to switching the dynamic and static output of erbium laser.
Description
Technical Field
The utility model relates to a dynamic and static output switching device, in particular to a device for switching the dynamic and static output of a dual-mode erbium laser.
Background
Lasers, which are considered to be one of the most powerful utility models for the twentieth century, have found important applications not only in the daily life and military fields, but have also greatly driven the technological development of other fields. The erbium laser with the output wavelength of 3 microns can be used for precisely cutting tissues such as cornea, teeth, bones and the like of eyes because the wavelength of the erbium laser is near the strong absorption peak of water and hydroxyapatite. Erbium lasers capable of outputting laser in two modes of static (free oscillation) and dynamic (Q-switched) can obtain high working frequency and high output energy during static output, and can obtain higher efficiency in tissue ablation, but the obtained laser pulse has wider width, so that thermal damage is easy to cause; when the laser is dynamically output, laser with narrow pulse width can be obtained, high frequency and high energy are not easy to obtain, and the ablation speed is reduced, but the thermal damage to normal tissues is reduced. The two working modes of the erbium laser have advantages and disadvantages respectively, and different working modes are needed to be adopted according to different clinical application conditions. For this purpose, some beneficial attempts and efforts have been made, such as a device for 2.79 μm erbium laser dynamic-static switching and frequency modulation by the applicant of chinese patent No. CN 204205279U, published on 11/3/2015. The device described in the patent is that a controllable baffle is arranged between a Q-switching switch of a Q-switching erbium laser and a laser rod, the center of the controllable baffle is connected with a motor shaft, the movement tracks of a reflector and a through hole which are arranged on the controllable baffle and equidistant from the center are all positioned in an oscillation loop of the laser, and a motor, an optocoupler and a laser power supply are all electrically connected with a central controller; when the output needs to be switched, the central controller places the reflecting mirror or the through hole in the oscillation loop of the laser through the motor so as to obtain static or dynamic erbium laser output. Although static or dynamic erbium laser output can be obtained, the device has the defects that firstly, a baffle plate is inserted into a cavity of a laser oscillator to change the cavity length, so that the loss in the cavity is influenced, and the energy output by the laser is reduced; and secondly, when static erbium laser is output, the total reflection mirror on the baffle plate is used as a rear cavity plate of the laser oscillator, so that the requirement on mechanical precision of motor switching is very high, and the reliability of the output laser is extremely difficult to ensure.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provides a device for switching dynamic and static output of dual-mode erbium laser, which has higher stability and reliability.
In order to solve the technical problem of the utility model, the technical proposal adopted is that the device for switching the dynamic and static output of the dual-mode erbium laser consists of an erbium laser component and a switching component, in particular:
the erbium laser component consists of a Q-switched erbium laser component and a free oscillation erbium laser component, wherein the output light path of the Q-switched erbium laser component is vertical to the output light path of the free oscillation erbium laser component;
the switching component consists of a switching plate which is coaxial with the stepping motor, a reflecting mirror arranged on the switching component and has a through hole equidistant with the rotating shaft, and a photoelectric sensor which is matched and connected with the switching plate;
the switching plate and the output light path of the free oscillation erbium laser component form an angle of 40-50 degrees, and the intersection point of the output light path of the Q-switched erbium laser component and the output light path of the free oscillation erbium laser component is positioned on the reflecting mirror surface;
the xenon lamp and the Q-switching crystal in the first light focusing cavity in the Q-switching erbium laser component and the xenon lamp in the second light focusing cavity in the free-running erbium laser component are electrically connected with a laser power supply containing a Q-switching driver;
the photoelectric sensor is electrically connected with the input end of the monitor, the stepping motor is electrically connected with the output end of the monitor through the stepping motor driver, and the output end of the monitor is electrically connected with the input end of the laser power supply containing the Q-switching driver.
Further improvement as a device for dual-mode erbium laser dynamic-static output switching:
preferably, the Q-switched erbium laser component is a first output cavity piece arranged at one end of a first laser rod, a Q-switched crystal and a first total reflection cavity piece arranged at the other end of the first laser rod in sequence, and a xenon lamp in a first condensation cavity is arranged on the side surface of the first laser rod.
Preferably, a quarter wave plate is arranged between the first laser rod and the first output cavity piece, and a polarizer is arranged between the first laser rod and the Q-switched crystal.
Preferably, the free oscillation erbium laser component is a xenon lamp with two ends of a second laser rod respectively provided with a second output cavity piece, a second total reflection cavity piece and a second focusing cavity at the side face.
Preferably, an output light path of the Q-switched erbium laser component and an output light path of the free oscillation erbium laser component are arranged in parallel, and a total reflection mirror is arranged on a light path between the Q-switched erbium laser component and the switching plate; the volume of the device is reduced, and the adjustment of the light guide path is facilitated.
Preferably, the monitor is a microcomputer, or a single chip microcomputer, or a comparator.
Compared with the prior art, the beneficial effects are that:
after the structure is adopted, the switching component is arranged outside the Q-switched erbium laser component and the free oscillation erbium laser component, so that when the dynamic and static output is switched, the influence of the switching component on the cavity structure of the laser oscillator is avoided, and the mechanical precision of the switching component is not excessively high, so that the switching component is extremely easy to be widely and commercially applied to the dynamic and static output of the switching erbium laser.
Drawings
Fig. 1 is a schematic view of a basic structure of the present utility model.
Fig. 2 is a schematic front view of the switch plate of fig. 1.
Detailed Description
The preferred mode of the present utility model will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the apparatus for dual-mode erbium laser dynamic and static output switching is constructed as follows:
the utility model consists of an erbium laser component and a switching component, wherein:
the erbium laser component consists of a Q-switched erbium laser component and a free oscillation erbium laser component, wherein the output light path of the Q-switched erbium laser component is vertical to the output light path of the free oscillation erbium laser component. The Q-switched erbium laser component is characterized in that one end of a first laser rod 4 is sequentially provided with a quarter wave plate 6 and a first output cavity piece 7, the other end of the first laser rod is sequentially provided with a polarizer 3, a Q-switched crystal 2 and a first total reflection cavity piece 1, and the side surface of the first laser rod 4 is provided with a xenon lamp 5 in a first condensation cavity; the free oscillation erbium laser component is a xenon lamp 10 with two ends of a second laser rod 11 respectively provided with a second output cavity piece 12, a second total reflection cavity piece 9 and a second focusing cavity at the side surface.
The switching component consists of a rotating shaft 21 which is coaxial with the stepping motor 14, a reflecting mirror 19 arranged on the switching component, a switching plate 13 with a through hole 20 equidistant with the rotating shaft 21, and a photoelectric sensor 15 matched with the switching plate 13; the switching plate 13 forms an angle of 45 degrees (40-50 degrees) with the output light path of the free-running erbium laser component, and the intersection point of the output light path of the Q-switched erbium laser component and the output light path of the free-running erbium laser component is positioned on the surface of the reflecting mirror 19.
The xenon lamp 5 and the Q-switching crystal 2 in the first condensing cavity in the Q-switching erbium laser component and the xenon lamp 10 in the second condensing cavity in the free-running erbium laser component are electrically connected with a laser power supply 16 containing a Q-switching driver; the photoelectric sensor 15 is electrically connected with the input end of the monitor 18, the stepping motor 14 is electrically connected with the output end of the monitor 18 through the stepping motor driver 17, and the output end of the monitor 18 is electrically connected with the input end of the laser power supply 16 containing the Q-switching driver; the monitor 18 is a microcomputer (may be a single-chip microcomputer or a comparator).
If the output light path of the Q-switched erbium laser component and the output light path of the free-running erbium laser component are arranged in parallel, a total reflection mirror 8 is arranged on the light path between the Q-switched erbium laser component and the switching plate 13.
In use, the monitor 18 controls the stepper motor driver 17 to drive the stepper motor 14 to rotate, and the photoelectric sensor 15 detects the position information of the switch plate 13. If the dynamic erbium laser needs to be switched and output, when the reflecting mirror 19 on the board 13 to be switched is in the output light path of the Q-switched erbium laser component, the monitor 18 triggers the laser power supply 16 with the Q-switched driver to the Q-switched working state while stopping the rotation of the stepping motor 14 according to the position information sent by the photoelectric sensor 15, and only the dynamic erbium laser of the device is output to the light guide system through the reflecting mirror 19. If the static erbium laser needs to be switched and output, when the through hole 20 on the board 13 to be switched is in the output light path of the free oscillation erbium laser component, the monitor 18 triggers the laser power supply 16 with the Q-switched driver to a static working state while stopping the rotation of the stepping motor 14 according to the position information sent by the photoelectric sensor 15, and only the static erbium laser of the device is output to the light guide system through the through hole 20.
It will be apparent to those skilled in the art that various modifications and variations can be made in the apparatus for dual mode erbium laser dynamic-static output switching of the present utility model without departing from the spirit and scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. A device for dual-mode erbium laser dynamic and static output switching comprises an erbium laser component and a switching component, and is characterized in that:
the erbium laser component consists of a Q-switched erbium laser component and a free oscillation erbium laser component, wherein the output light path of the Q-switched erbium laser component is vertical to the output light path of the free oscillation erbium laser component;
the switching component consists of a switching plate (13) which is coaxial with a rotating shaft (21) of the stepping motor (14), a reflecting mirror (19) and a through hole (20) which are arranged on the switching plate and equidistant with the rotating shaft (21), and a photoelectric sensor (15) which is matched and connected with the switching plate (13);
the switching plate (13) forms an angle of 40-50 degrees with an output light path of the free oscillation erbium laser component, and an intersection point of the Q-switched erbium laser component output light path and the free oscillation erbium laser component output light path is positioned on the surface of the reflecting mirror (19);
the xenon lamp (5) and the Q-switching crystal (2) in the first condensation cavity in the Q-switching erbium laser component and the xenon lamp (10) in the second condensation cavity in the free-running erbium laser component are electrically connected with a laser power supply (16) containing a Q-switching driver;
the photoelectric sensor (15) is electrically connected with the input end of the monitor (18), the stepping motor (14) is electrically connected with the output end of the monitor (18) through the stepping motor driver (17), and the output end of the monitor (18) is electrically connected with the input end of the laser power supply (16) with the Q-switching driver.
2. The device for switching dynamic and static output of the dual-mode erbium laser according to claim 1, wherein the Q-switched erbium laser component is characterized in that a first output cavity sheet (7) is arranged at one end of a first laser rod (4), a Q-switched crystal (2) and a first total reflection cavity sheet (1) are sequentially arranged at the other end of the first laser rod, and a xenon lamp (5) in a first condensation cavity is arranged at the side surface of the first laser rod (4).
3. The device for switching dynamic and static output of the dual-mode erbium laser according to claim 2, wherein a quarter wave plate (6) is arranged between the first laser rod (4) and the first output cavity plate (7), and a polarizer (3) is arranged between the first laser rod and the Q-switched crystal (2).
4. The device for switching dynamic and static output of the dual-mode erbium laser according to claim 1, wherein the free-running erbium laser component is a xenon lamp (10) in a second focusing cavity, wherein the two ends of the second laser rod (11) are respectively provided with a second output cavity piece (12) and a second total reflection cavity piece (9), and the side surfaces of the second output cavity piece and the second total reflection cavity piece are respectively provided with a second focusing cavity.
5. The device for switching dynamic and static output of dual-mode erbium laser according to claim 1, wherein the output light path of the Q-switched erbium laser component and the output light path of the free-running erbium laser component are arranged in parallel, and a total reflection mirror (8) is arranged on the light path between the Q-switched erbium laser component and the switching plate (13).
6. The device for switching dynamic and static outputs of a dual-mode erbium laser according to claim 1, characterized in that the monitor (18) is a microcomputer, or a single-chip microcomputer, or a comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911291904.3A CN111106522B (en) | 2019-12-16 | 2019-12-16 | Device for switching dynamic and static output of dual-mode erbium laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911291904.3A CN111106522B (en) | 2019-12-16 | 2019-12-16 | Device for switching dynamic and static output of dual-mode erbium laser |
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| CN111106522A CN111106522A (en) | 2020-05-05 |
| CN111106522B true CN111106522B (en) | 2024-03-26 |
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| CN211063043U (en) * | 2019-12-16 | 2020-07-21 | 中国科学院合肥物质科学研究院 | Device for switching dynamic and static output of dual-mode erbium laser |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3048316B1 (en) * | 2016-02-29 | 2019-06-28 | Sagem Defense Securite | DEVICE FOR DETECTING A LASER SPOT |
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2019
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|---|---|---|---|---|
| CN1645691A (en) * | 2005-02-02 | 2005-07-27 | 中国科学院物理研究所 | Active and passive Q-adjusted single longitudinal mode laser |
| CN103300934A (en) * | 2013-04-11 | 2013-09-18 | 中国科学院合肥物质科学研究院 | 2.79 mu m Q-switched erbium laser dental instrument |
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