CN207588207U - A kind of beam quality reforming unit - Google Patents
A kind of beam quality reforming unit Download PDFInfo
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- CN207588207U CN207588207U CN201721746309.0U CN201721746309U CN207588207U CN 207588207 U CN207588207 U CN 207588207U CN 201721746309 U CN201721746309 U CN 201721746309U CN 207588207 U CN207588207 U CN 207588207U
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- pumping
- reforming unit
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Abstract
The utility model discloses a kind of beam quality reforming unit, device includes：Semiconductor laser；Disc laser；Mix ytterbium silica fibre three parts composition.The utility model utilizes beam quality M2The semiconductor laser of ＜ 200 carries out end pumping to more stroke disc lasers, obtains continuous multimode, the output of bloom light conversion efficiency laser, M2＜ 50.Using the laser that disc laser exports as diode pumping source, carried out to mixing ytterbium silica fibre with band pumping, obtaining has low Excited state (2%), bloom phototranstormation efficiency, nearly diffraction limit (M2＜ 2) laser output.The high efficiency of semiconductor laser, the high efficiency and heat radiation of disc laser and the same low Excited state characteristic that the output of ytterbium silica fibre is mixed with pumping is cleverly utilized in the utility model, realizes high power, the method for transformation of high light beam quality.
Description
Technical field
The utility model is related to all solid state laser fields, and in particular to a kind of beam quality reforming unit field.
Background technology
Due to mixing Yb3+Laser medium is usually limited by serious fuel factor, high power, high light beam quality, high conversion
Efficiency all solid state laser is made slow progress.Nowadays with the appearance with pump technology, being swashed based on semiconductor laser and disk
The Yb of the same band pumping of light device:YAG laser is just becoming acquisition high power, high light beam quality, all solid state of high transformation efficiency and is swashing
The research hotspot of light device.Yb3+The Yb of doping:YAG concentration is pumped by using the pump light of 940nm wavelength up to 20%,
YAG:YAG crystal can be using emission center wavelength as two main laser wavelength of 1050nm and 1030nm.By using disk laser
The high efficiency and heat radiation of device can share all solid state laser heat, and minimum heat is taken to and mixes ytterbium stone with pumping
In English optical fiber, so as to fulfill the same band pump laser with low Excited state (within 2%), and the nearly diffraction pole of high power is obtained
Limit M2The laser output of ＜ 2.
Utility model content
The purpose of this utility model is to provide a kind of beam quality reforming units, are swashed using semiconductor laser and disk
Light device is as I and II pumping source, with band pumping Yb3+The fiber gain media of doping, quantum efficiency is high, and beam quality connects
The laser output of nearly diffraction limit, and fuel factor problem is can solve, while export laser and swash for optical fiber output single mode
Light.
The semiconductor laser uses centre wavelength to be pumped for 940nm, 969nm gallium arsenide laser as level-one
Source.
A kind of beam quality reforming unit, including semiconductor laser, disc laser mixes ytterbium silica fibre composition；Half
Conductor laser enters disc laser as the pumping laser of level-one pumping source and disc laser is pumped, and is had
The multi-mode laser output of bloom-light (more than 70%) transformation efficiency；The laser exported using disc laser, as diode pumping
Source to mixing ytterbium silica fibre with band pumping (Excited state ＜ 2%), export after mixing ytterbium silica fibre, realize high beam
Quality (M2＜ 2) reforming unit.
The disc laser, using 24,32,48 stroke disc lasers as diode pumping source.Gain media is
Yb:YAG；Disc laser output laser be multi-mode laser, output wavelength 1030nm, 1050nm；
Described mixes ytterbium silica fibre, gain media Yb3+, the matrix of doping is silica, by diode pumping
The output wavelength of laser afterwards is 1080nm；Fiber gain media Yb3+Adulterate molar concentration 15-20%.
The first order semiconductor pumping sources beam quality M2＜ 200, diode pumping disc laser beam quality M2＜
50, what is finally obtained mixes ytterbium silica fibre and can obtain beam quality M2The laser output of the high light beam quality of ＜ 2.
A kind of beam quality reforming unit provided by the utility model, which uses modularized design, simple in structure, easily
In maintenance.
Description of the drawings
Fig. 1 is a kind of beam quality reforming unit of embodiment 1
Specific embodiment
It is new to this practicality below in conjunction with specific embodiment in order to which the purpose of this utility model and advantage is more clearly understood
Type is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the utility model, not
For limiting the utility model.The specific embodiment is explained with a kind of beam quality reforming unit and method.
As shown in Figure 1, a kind of beam quality reforming unit, including semiconductor laser 1, disc laser 3 mixes ytterbium quartz
Optical fiber 5 forms.It is characterized in that：Semiconductor laser 1 carries out pumping 2 as level-one pumping source to disc laser 3, is had
The multi-mode laser for having bloom-light (70%) transformation efficiency exports；The laser exported using disc laser 3, as diode pumping
Source to mixing ytterbium silica fibre with band 4 (Excited state ＜ 2%) of pumping, realize the conversion dress of high light beam quality (M2 ＜ 2)
It puts.
The semiconductor laser 1 uses centre wavelength to be pumped for 940nm, 969nm gallium arsenide laser as level-one
Source, array or for single tube form.
The disc laser 3 is using 24,32,48 stroke disc lasers 3 as diode pumping source.Gain media is
Yb:YAG；3 output laser of disc laser be multi-mode laser, output wavelength 1030nm, 1050nm；
The disc laser 3 mainly includes：Reflecting prism and aspherical reflection focus lamp, wherein reflecting prism are used for
Turnover pump light realizes the purpose of more strokes pumping disk crystal.Aspherical reflection focus lamp is how to arrive it using directional light
The reflecting element of the characteristic of focal position is focused on after reflecting surface.
Described mixes 5 gain media of ytterbium silica fibre for Yb3+, and the matrix of doping is silica, after diode pumping
Laser output wavelength be 1080nm；Fiber gain media Yb3+ doping concentration 15-20%, this can be obtained with band pumping range
High light-phototranstormation efficiency, theoretical light-phototranstormation efficiency up to 98%, the system light-phototranstormation efficiency up to 70% with
On, it is the important link for realizing beam quality conversion.Due to the high-quantum efficiency 98% that it has, only 2% Excited state,
Its exportable ultra high power laser, while can only generate few heat.It can should by using techniques for microchannel cooling
Heat loses.
A kind of beam quality reforming unit and method, 1 beam quality M2 ＜ 200 of first order semiconductor pumping sources,
3 beam quality M2 ＜ 50 of diode pumping disc laser, last mixing ytterbium silica fibre 5 and can obtain light beam with 4 acquisitions of band pumping
The laser output of the high light beam quality of 2 ＜ 2 of mass M.
In described device, 1030nm is the same as the same band pumping for mixing ytterbium silica fibre 5 as 1050nm with pumping disc laser 3
Source is coupled by optical fibre wavelength division multiplexer and mixes ytterbium silica fibre 5, and ground state level absorbs 1030nm pumpings from energy level 2F7/2
High level 2F5/2 is transitted to, 2F7/2 is transitted to from excitation state 2F5/2, the light of 1050nm can be generated in this quasi-three-level structure
Son.The generation of 1050nm laser is real by using the very short highly doped Yb dosed optical fiber of length and narrow band fiber Bragg grating
Existing, since laser longitudinal module spacing is related to laser cavity chamber length, laser longitudinal module spacing can be increased by reducing laser cavity chamber length, be conducive to
The selection of single longitudinal mode, and narrow band fiber Bragg grating can further limit the wave-length coverage of output laser, finally obtain narrow
Line width 1050nm single-frequency lasers export.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, under the premise of the utility model principle is not departed from, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (3)
1. a kind of beam quality reforming unit, it is characterised in that：Including semiconductor laser（1）, disc laser（3）, mix ytterbium
Silica fibre（5）Composition；Semiconductor laser enters disc laser to disk laser as the pumping laser of level-one pumping source
Device is pumped, and is obtained the multi-mode laser with 70% transformation efficiency of bloom-light and is exported；Utilize disc laser（3）Output swashs
Light, as diode pumping source to mixing ytterbium silica fibre（5）It carries out with band pumping, Excited state ＜ 2%, through mixing ytterbium silica fibre（5）
After export, realize high light beam quality M2The reforming unit of ＜ 2.
2. a kind of beam quality reforming unit according to claim 1, it is characterised in that：Semiconductor laser（1）Using
Centre wavelength is 940nm and/or 969nm gallium arsenide lasers as level-one pumping source.
3. a kind of beam quality reforming unit according to claim 1, it is characterised in that：Disc laser（3）Using 24,
32 or 48 stroke disc lasers（3）As diode pumping source, gain media Yb:YAG；Disc laser（3）Export laser
Device is multi-mode laser, output center wavelength 1030nm, 1050nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721746309.0U CN207588207U (en) | 2017-12-14 | 2017-12-14 | A kind of beam quality reforming unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721746309.0U CN207588207U (en) | 2017-12-14 | 2017-12-14 | A kind of beam quality reforming unit |
Publications (1)
| Publication Number | Publication Date |
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| CN207588207U true CN207588207U (en) | 2018-07-06 |
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| CN201721746309.0U Active CN207588207U (en) | 2017-12-14 | 2017-12-14 | A kind of beam quality reforming unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109962400A (en) * | 2017-12-14 | 2019-07-02 | 中国科学院大连化学物理研究所 | A kind of beam quality reforming unit |
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2017
- 2017-12-14 CN CN201721746309.0U patent/CN207588207U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109962400A (en) * | 2017-12-14 | 2019-07-02 | 中国科学院大连化学物理研究所 | A kind of beam quality reforming unit |
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