CN106549294A - The hysteroscope of solid state laser and the resonator and solid state laser using which - Google Patents
The hysteroscope of solid state laser and the resonator and solid state laser using which Download PDFInfo
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- CN106549294A CN106549294A CN201710016969.1A CN201710016969A CN106549294A CN 106549294 A CN106549294 A CN 106549294A CN 201710016969 A CN201710016969 A CN 201710016969A CN 106549294 A CN106549294 A CN 106549294A
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- solid state
- state laser
- hysteroscope
- diameter
- resonator
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- 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
- H01S3/08013—Resonator comprising a fibre, e.g. for modifying dispersion or repetition rate
-
- 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
- H01S3/08018—Mode suppression
-
- 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
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
A kind of hysteroscope of solid state laser and the resonator and solid state laser using which, hysteroscope includes an Effect of Back-Cavity Mirror and an outgoing mirror, respectively positioned at the left and right sides of resonant cavity of solid state laser, Effect of Back-Cavity Mirror and outgoing mirror are coated with a diameter of 1～3mm of high-reflecting film and part reflectance coating, high-reflecting film and part reflectance coating respectively towards the centre of surface on the inside of resonator.When in the present invention, a diameter of solid state laser peak power of high-reflecting film and part reflectance coating is exported 1.2～2 times of spot diameter in hysteroscope.Therefore loss of the solid state laser of the present invention to laser instrument peak power is minimum；Laser output is when middle power section, as the spot diameter on hysteroscope medial surface is more than filming diameter, by limited spot with diameter greater than filming diameter multistage transverse mode starting of oscillation, spot size in hysteroscope is limited to into filming diameter size, high-order mode quantity reduces and beam divergence angle can be caused to diminish simultaneously, so as to improve the beam quality of middle power section.
Description
Technical field
The invention belongs to laser technology field, relates more specifically to the hysteroscope and the resonance using which of a kind of solid state laser
Chamber and solid state laser.
Background technology
Gao Gong is obtained using solid-state laser extremely difficult optical fiber by little core diameter of the rhabdolith as working-laser material
Rate laser is exported.Trace it to its cause, under high pump power, the central area of crystal bar can form very high temperature because of the superposition of pump light
Degree, and the surface of crystal bar is as radiating surface, and its temperature is relatively low, therefore there is high thermograde in the radial direction of crystal bar, meeting exists
Crystals form extremely strong refractive index gradient and cause serious thermal lensing effect, crystal bar now equivalent to one with
The increase of pump power, diopter constantly become big lens.It is main using the flat of symmetrical structure in high-power laser resonance cavity
There is a peak as the continuous change of thermal lens is big in flat resonator, power output, afterwards when thermal focal length is less than resonance
During a quarter of chamber optical length, resonator causes power output to fall sharply into Fei Wen areas, the beam quality of laser instrument then with
The change for crystal bar thermal lens presents greatly the trend for improving again that is first deteriorated, and beam quality is fabulous at the rated power of laser instrument
And it is worst in middle power section beam quality.Laser instrument generally selects optical fiber according to worst beam quality in fiber coupling, to the greatest extent
Pipe laser instrument is generally operational in the vicinity of rated power, and now the light beam parameters product BPP values of output light will be much smaller than energy-transmission optic fibre
BPP values, but if according at rated power beam quality select optical fiber, then it is very big in the coupling loss of middle power section,
Optical fiber is burnt easily.In order to ensure that optical fiber is not burned out, coupling efficiency is high and power output height on the premise of, using with
The Optical Fiber Transmission energy that beam quality matches at rated power, it is felt to be desirable to which a kind of method can be obviously improved middle power section
Beam quality, so as to reduce coupling loss.
The content of the invention
Based on above-mentioned technical problem, present invention is primarily targeted at proposing a kind of hysteroscope of solid state laser and applying which
Resonator and solid state laser, for solving at least one of above technical problem.
To achieve these goals, as one aspect of the present invention, the present invention proposes a kind of hysteroscope of solid state laser,
Including an Effect of Back-Cavity Mirror and an outgoing mirror, respectively positioned at the left and right sides of resonant cavity of solid state laser, Effect of Back-Cavity Mirror and outgoing mirror direction
Centre of surface on the inside of resonator be coated with respectively high-reflecting film and part reflectance coating, high-reflecting film and part reflectance coating a diameter of 1～
3mm。
Further, in correspondence when a diameter of solid state laser peak power of above-mentioned high-reflecting film and part reflectance coating is exported
1.2～2 times of spot diameter in hysteroscope.
Further, the reflectivity of above-mentioned high-reflecting film is more than 99%.
Further, the reflectivity R of above-mentioned part reflectance coating meets condition 20%≤R≤80%.
Further, above-mentioned outgoing mirror is coated with anti-reflection film towards the surface on the outside of resonator, and the reflectivity of anti-reflection film is less than
1%.
Further, a diameter of 10～25mm of above-mentioned Effect of Back-Cavity Mirror and outgoing mirror, thickness are 3～6mm.
To achieve these goals, the present invention also proposes a kind of resonator of solid state laser, swashs including such as above-mentioned solid
The hysteroscope of light device.
Further, the resonator of above-mentioned solid state laser also includes an all-solid state laser head or a lamp pump Solid State Laser
Head.
When in use, the center of the center of high-reflecting film, part reflectance coating is in all-solid state laser head or lamp pump Solid State Laser head
On the extended line of interior crystal bar axis.
To achieve these goals, the present invention also proposes a kind of solid state laser, including the resonance of above-mentioned solid state laser
Chamber.
The hysteroscope of solid state laser proposed by the present invention and the resonator and solid state laser using which, with following beneficial
Effect：
1st, the hysteroscope of solid state laser proposed by the present invention, thereafter cavity mirror plating penetrate high-reflecting film, part reflection is penetrated in outgoing mirror plating
Film, spot diameter when filming diameter is in highest output state according to laser instrument in hysteroscope determine that its size is that hot spot is straight
1.2～2 times of footpath.Therefore it is minimum to the loss of laser instrument peak power.Laser output when middle power section, due to hysteroscope
Spot diameter on medial surface be more than filming diameter, by limited spot with diameter greater than filming diameter multistage transverse mode starting of oscillation, by chamber
Spot size on mirror is limited to filming diameter size, beam divergence angle can be caused to diminish while high-order mode quantity is reduced, so as to
Improve the beam quality of middle power section.
2nd, solid state laser proposed by the present invention, the beam quality due to improving middle power section, therefore can select with
The optical fiber that the beam quality of rated power matches, and efficient coupling can be kept in total power section, solve little core diameter light
It is fine low in the coupling efficiency of middle power section, easily damage the technical barrier of optical fiber.
Description of the drawings
Fig. 1 is the structural representation of the hysteroscope of the solid state laser that one embodiment of the invention is proposed；
Fig. 2 is that one embodiment of the invention is determination hysteroscope filming diameter, measures the Optical devices figure of spot size in hysteroscope；
Fig. 3 is the fiber coupling schematic diagram of the solid state laser that one embodiment of the invention is proposed；
Fig. 4 be the solid state laser that proposes of one embodiment of the invention using with unused Fig. 1 during solid state laser hysteroscope
Coupling efficiency comparison diagram.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in further detail.
The invention discloses a kind of hysteroscope of solid state laser, including an Effect of Back-Cavity Mirror and an outgoing mirror, respectively positioned at solid
The left and right sides of laser resonant cavity, Effect of Back-Cavity Mirror and outgoing mirror are being coated with high-reflecting film respectively towards the centre of surface on the inside of resonator
With a diameter of 1～3mm of part reflectance coating, high-reflecting film and part reflectance coating.
Preferably, in corresponding cavity when a diameter of solid state laser peak power of above-mentioned high-reflecting film and part reflectance coating is exported
1.2～2 times of spot diameter on mirror, it is preferable that during a diameter of solid state laser peak power of high-reflecting film and partially reflecting mirror
1.5 times of spot diameter in Effect of Back-Cavity Mirror.Therefore the loss of laser instrument rated power is minimum；The output of laser instrument is in middle power section
When, due to the spot diameter on hysteroscope medial surface be more than filming diameter, by limited spot with diameter greater than filming diameter multistage horizontal stroke
Mould starting of oscillation, then the spot size in hysteroscope be limited to filming diameter size, while the reduction of high-order mode quantity can cause light beam send out
Scattered angle diminishes, so as to improve the beam quality of middle power section.
The reflectivity of above-mentioned high-reflecting film is more than 99%, the reflectivity R of above-mentioned part reflectance coating meet 20%≤R of condition≤
80%；Export preferably for continuous laser, the reflectivity of part reflectance coating is 70%, and for pulse laser is exported, part is anti-
The reflectivity for penetrating film is 20%.Above-mentioned outgoing mirror is coated with anti-reflection film towards the surface on the outside of resonator, and the reflectivity of anti-reflection film is little
In 1%, it is preferable that diameter of the diameter of the anti-reflection film not less than part reflectance coating.
Preferably, a diameter of 10～25mm of above-mentioned Effect of Back-Cavity Mirror and outgoing mirror, thickness are 3～6mm.
Preferably, before above-mentioned Effect of Back-Cavity Mirror and outgoing mirror plated film for mechanical means polishing frosting, carbon dioxide laser
Rough surface or uncoated substrate surface after mark.
Based on the hysteroscope of above-mentioned solid state laser, the invention discloses a kind of resonator of solid state laser, including it is above-mentioned
The hysteroscope of solid state laser.
The resonator of above-mentioned solid state laser also includes a laser head, and the laser head is preferably all-solid state laser head or lamp pump
Solid State Laser head.
When in use, the center of the center of Effect of Back-Cavity Mirror high-reflecting film, outgoing mirror part reflectance coating is in crystal bar in laser head
On the extended line of axis.
Based on the hysteroscope of above-mentioned solid state laser, the present invention also proposes a kind of solid state laser, including above-mentioned Solid State Laser
The resonator of device.
The solid state laser can select the optical fiber that the beam quality with rated power matches to carry out fiber coupling, so as to
Efficient coupling can be kept in total power section, and the coupling efficiency for little core optical fibers being solved in middle power section is low, easily damages
The technical barrier of optical fiber.
Below by way of hysteroscope of the specific embodiment to solid state laser proposed by the present invention and the resonator using which and solid
Body laser is described in detail.
Embodiment 1
As shown in figure 1, the present embodiment proposes a kind of hysteroscope of solid state laser, including Effect of Back-Cavity Mirror 11 and outgoing mirror 12,
Effect of Back-Cavity Mirror 11 and outgoing mirror 12 are coated with high-reflecting film and part reflectance coating respectively towards the centre of surface on the inside of resonator, high-reflecting film and
When a diameter of solid state laser peak power of part reflectance coating is exported 1.5 times of spot diameter in Effect of Back-Cavity Mirror.
The high-reflecting film of Effect of Back-Cavity Mirror 11 is 99.5% to the reflectivity of 1064nm laser powers, and which is towards the table on the outside of resonator
Face not plated film；The part reflectance coating of outgoing mirror 12 is 70% to the reflectivity of 1064nm laser powers, and which is towards on the outside of resonator
Entire surface be coated with anti-reflection film, anti-reflection film is 0.5% to the reflectivity of 1064nm laser powers.Effect of Back-Cavity Mirror 11 and outgoing mirror 12 are not
Plated film part is lens substrate surface.A diameter of 20mm of Effect of Back-Cavity Mirror and outgoing mirror, thickness is 4mm.
Wherein the size of solid state laser spot size is measured using Optical devices as shown in Figure 2, and the device is with common
It is Effect of Back-Cavity Mirror 13 (high-reflecting film of the reflectivity R ＞ 99.5% to 1064nm laser is penetrated in the plating towards on the surface of laser head), common defeated
(high-reflecting film to 1064nm laser reflectivity R=70% is penetrated in the plating towards on the surface of laser head, dorsad the table of laser head for appearance 14
Anti-reflection film to 1064nm laser reflectivity R ＜ 0.5% is penetrated in face plating) constitute with the all-solid state laser head 15 of 1.2kW it is average symmetrical
Resonator, a length of 600mm in physics chamber of resonator.Maximum power transmission resonator exported by 45 ° of speculums 16 is to light
On absorber 17, and by the diameter of laser facula on the measurement outgoing mirrors 14 of the CCD19 with imaging device 18, measurement is somebody's turn to do
Spot diameter is 1.6mm.
Then a diameter of 1.6 × 1.5=of the part reflectance coating that above-mentioned outgoing mirror 12 is penetrated towards the plated surface on the inside of resonator
2.4mm.Because being symmetric cavity, the diameter of the highly reflecting films that above-mentioned Effect of Back-Cavity Mirror 11 is penetrated towards the centre of surface plating on the inside of resonator
For 2.4mm.
Using the hysteroscope of above-mentioned solid state laser, the present embodiment also proposes a kind of resonator of solid state laser, resonator
Laser head adopt all-solid state laser head, and the center of 11 high-reflecting film of Effect of Back-Cavity Mirror, the center of 12 part reflectance coating of outgoing mirror swash
In bare headed on the extended line of crystal bar axis.
Embodiment 2
Based on the resonator of solid state laser in embodiment 1, the present embodiment proposes a kind of solid state laser, using such as Fig. 2
Shown Optical devices, wherein common Effect of Back-Cavity Mirror 13 to be replaced with the Effect of Back-Cavity Mirror 11 in embodiment 1, common output mirror 14 are replaced
For the outgoing mirror 12 in embodiment 1, and in removing Fig. 2, measure the respective optical element of hot spot.
As shown in figure 3, for the present embodiment propose solid state laser application exemplary plot, to solid state laser plus collimation with
Focusing system 20, collimation are will be coupled in 200 μm of optical fiber 21 with the light beam after focusing, and this adds the device of coupled system can use
In the laser welding process of the metal parts such as the production of kitchen five metals, automobile body-in-white welding.
In order to the solid state laser for illustrating the present embodiment proposition compares the advantage of existing solid state laser, light in measurement Fig. 3
Learn the change of the coupling efficiency with power output of device；And change Effect of Back-Cavity Mirror in Fig. 3 11 and outgoing mirror 12 into common Effect of Back-Cavity Mirror 13
With common output mirror 14, the coupling efficiency of measurement Optical devices in Fig. 3 using common Effect of Back-Cavity Mirror 13 and during common output mirror 14 with
The change of power output, and the coupling efficiency in the case of two kinds is compared with the change of power output, obtain as shown in Figure 4
Comparison diagram, figure 4, it is seen that by common Effect of Back-Cavity Mirror 13 and common output mirror 14 replace with the present embodiment proposition solid
Effect of Back-Cavity Mirror 11 and outgoing mirror 12 that laser instrument is adopted, coupling efficiency is greatly improved, then the solid state laser that the present embodiment is proposed
Beam quality is significantly improved, while ensure that higher power output.
Particular embodiments described above, has been carried out to the purpose of the present invention, technical scheme and beneficial effect further in detail
Describe in detail bright, it should be understood that the foregoing is only the specific embodiment of the present invention, be not limited to the present invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc. should be included in the protection of the present invention
Within the scope of.
Claims (9)
1. a kind of hysteroscope of solid state laser, an including Effect of Back-Cavity Mirror and an outgoing mirror, respectively positioned at the solid state laser resonance
The left and right sides in chamber, it is characterised in that：The Effect of Back-Cavity Mirror and outgoing mirror are coated with height respectively towards the centre of surface on the inside of resonator
A diameter of 1～3mm of anti-film and part reflectance coating, the high-reflecting film and part reflectance coating.
2. the hysteroscope of solid state laser as claimed in claim 1, it is characterised in that the high-reflecting film and part reflectance coating it is straight
Footpath is when the solid state laser peak power is exported 1.2～2 times of spot diameter in hysteroscope.
3. the hysteroscope of solid state laser as claimed in claim 1, it is characterised in that the reflectivity of the high-reflecting film is more than
99%.
4. the hysteroscope of solid state laser as claimed in claim 1, it is characterised in that the reflectivity R of the part reflectance coating is full
Sufficient condition 20%≤R≤80%.
5. the hysteroscope of solid state laser as claimed in claim 1, it is characterised in that the outgoing mirror is towards on the outside of resonator
Surface is coated with anti-reflection film, and the reflectivity of the anti-reflection film is less than 1%.
6. the hysteroscope of solid state laser as claimed in claim 1, it is characterised in that the Effect of Back-Cavity Mirror and outgoing mirror it is a diameter of
10～25mm, thickness are 3～6mm.
7. a kind of resonator of solid state laser, it is characterised in that include that the solid as any one of claim 1-6 swashs
The hysteroscope of light device.
8. the resonator of solid state laser as claimed in claim 7, it is characterised in that the resonator of the solid state laser is also
Including an all-solid state laser head or a lamp pump Solid State Laser head.
9. a kind of solid state laser, it is characterised in that including the resonator of solid state laser as described in claim 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710016969.1A CN106549294B (en) | 2017-01-10 | 2017-01-10 | The hysteroscope of solid state laser and the resonant cavity and solid state laser for applying it |
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| CN201710016969.1A CN106549294B (en) | 2017-01-10 | 2017-01-10 | The hysteroscope of solid state laser and the resonant cavity and solid state laser for applying it |
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| CN106549294A true CN106549294A (en) | 2017-03-29 |
| CN106549294B CN106549294B (en) | 2019-12-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075346A (en) * | 2018-01-11 | 2018-05-25 | 苏州紫光伟业激光科技有限公司 | A kind of microlaser of ultrashort pulse high-peak power |
| CN108270143A (en) * | 2018-01-28 | 2018-07-10 | 北京工业大学 | A kind of Slab Geometry Laser Resonator |
| CN112928588A (en) * | 2021-01-25 | 2021-06-08 | 中国科学院上海光学精密机械研究所 | Multi-wavelength laser |
| CN115248108A (en) * | 2022-07-08 | 2022-10-28 | 山西大学 | Device and method for measuring light spots in cavity of resonant cavity |
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| CN1097264A (en) * | 1994-03-31 | 1995-01-11 | 中国科学院上海光学精密机械研究所 | Ripple output coupling mirror for unstable resonator of laser |
| CN105470788A (en) * | 2014-09-30 | 2016-04-06 | 发那科株式会社 | Laser oscillator |
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| CN1097264A (en) * | 1994-03-31 | 1995-01-11 | 中国科学院上海光学精密机械研究所 | Ripple output coupling mirror for unstable resonator of laser |
| CN105470788A (en) * | 2014-09-30 | 2016-04-06 | 发那科株式会社 | Laser oscillator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075346A (en) * | 2018-01-11 | 2018-05-25 | 苏州紫光伟业激光科技有限公司 | A kind of microlaser of ultrashort pulse high-peak power |
| CN108270143A (en) * | 2018-01-28 | 2018-07-10 | 北京工业大学 | A kind of Slab Geometry Laser Resonator |
| CN112928588A (en) * | 2021-01-25 | 2021-06-08 | 中国科学院上海光学精密机械研究所 | Multi-wavelength laser |
| CN115248108A (en) * | 2022-07-08 | 2022-10-28 | 山西大学 | Device and method for measuring light spots in cavity of resonant cavity |
| CN115248108B (en) * | 2022-07-08 | 2024-08-23 | 山西大学 | Device and method for measuring light spots in inner cavity of resonant cavity |
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| CN106549294B (en) | 2019-12-03 |
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