CN204243448U - Q system adjusted by a kind of machinery for fiber laser - Google Patents
Q system adjusted by a kind of machinery for fiber laser Download PDFInfo
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- CN204243448U CN204243448U CN201420788837.2U CN201420788837U CN204243448U CN 204243448 U CN204243448 U CN 204243448U CN 201420788837 U CN201420788837 U CN 201420788837U CN 204243448 U CN204243448 U CN 204243448U
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Abstract
The utility model discloses a kind of machinery for fiber laser and adjust Q system, it is characterized in that the pumping semiconductor laser comprising band tail optical fiber, it exports the pumping input port that tail optical fiber is connected to optical-fiber bundling device, the output optical fibre port of optical-fiber bundling device connects high anti-Fiber Bragg Grating FBG, the other end of grating welds with yb-doped double-clad fiber and is connected, the other end of yb-doped double-clad fiber with write the low anti-Fiber Bragg Grating FBG be formed on polarization maintaining optical fibre and weld mutually, Q system adjusted by the machinery having modulated laser pulse to export between yb-doped double-clad fiber and low anti-Fiber Bragg Grating FBG, machinery adjusts the piezoelectric element in Q system to be controlled by drive circuit, modulation signal drive circuit is used for driving piezoelectric element periodically to press chamber inner fiber with polarisation of light direction in buncher, the low anti-Fiber Bragg Grating FBG other end is the output of fiber laser, there is high modulation frequency, modulation distance can precise hard_drawn tuhes, the design of modulating characteristic available mechanical changes, the advantages such as good reliability.
Description
Technical field
The utility model relates to a kind of pulse output optical fibre laser, and Q system adjusted by especially a kind of machinery of single-frequency pulse ytterbium-doped all fibre laser system, belongs to optical fiber and laser technology field.
Background technology
The laser that fiber laser is is gain media with the optical fiber of doped with rare-earth elements, by the different rare earth element that adulterates, as bait (Er), an an ancient unit of weight equal to 20 or 24 *taels of silver (Yb), thulium (Tm), holmium (Ho), neodymium (Nd) etc., the service band of fiber laser cover from ultraviolet to infrared.Compared with other lasers, it is low that fiber laser has laser work threshold value, energy transformation ratio is high, output beam quality good, compact conformation is stable, the distinguishing feature such as long and Maintenance free without the need to light path adjustment, perfect heat-dissipating, life-span, is therefore rapidly developed and applies widely.
Compared to continuous type fiber laser, the fiber laser of impulse type can provide relatively high peak power and pulse energy, is more conducive to the application in a lot of field, such as degree of depth mark, nonlinear optics etc.Therefore develop a kind of high power pulse type full-optical-fiber laser and its industrialization is had important economic benefit and social benefit.
Q system adjusted by machinery in the past, and there are the following problems: 1. modulation effect is with frequency change; 2. modulation frequency range is low; 3. modulation effect changes in time; 4. each design modulation effect is not easily predicted; 5. modulation effect not easily repeats.
Summary of the invention
The utility model overcomes above the deficiencies in the prior art, provides a kind of Stability Analysis of Structures, reliable, and Q system adjusted by the excellent machinery for fiber laser of modulating performance.
Q system adjusted by a kind of machinery for fiber laser, comprise jointed fiber laser 1 and adjust Q system 2 two parts, it is characterized in that jointed fiber laser 1 comprises: the pumping semiconductor laser 3 of band tail optical fiber, its output tail optical fiber is connected to the pumping input port of optical-fiber bundling device 4, the output optical fibre port of optical-fiber bundling device 4 connects high anti-Fiber Bragg Grating FBG 5, the other end and the yb-doped double-clad fiber 6 of grating 5 weld together, the other end of yb-doped double-clad fiber 6 with write the low anti-Fiber Bragg Grating FBG 7 be formed on polarization maintaining optical fibre and weld mutually, Q system 8 adjusted by the machinery having modulated laser pulse to export between yb-doped double-clad fiber 6 and low anti-Fiber Bragg Grating FBG 7, machinery adjusts the piezoelectric element in Q system 8 to be controlled by drive circuit 9, modulation signal drive circuit 9 is used for driving piezoelectric element periodically to press chamber inner fiber with polarisation of light direction in buncher, low anti-Fiber Bragg Grating FBG 7 other end is the output of fiber laser.
The utility model adopts the combination of mechanical structure and piezoelectric ceramic, realizes precompressed to piezoelectric ceramic, substantially increases the upper frequency limit adjusting Q.
The utility model realizes the design different to the precompressed of piezoelectric element for needing, and substantially increases the design flexibility adjusting Q system.Can realize impossible design in the past, Machine Design decreases the mechanical complexity of system, substantially increases the constancy of the q-effect under different frequency, makes it have high modulation frequency; Modulation distance can precise hard_drawn tuhes; The design of modulating characteristic available mechanical changes; The advantages such as good reliability.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram of the present utility model.
Fig. 2 is a kind of structural representation sectional view that Q adjusted by the utility model machinery.
Fig. 3 is the A place enlarged drawing of Fig. 2.
Fig. 4 is the spring-quality system schematic diagram explaining the utility model principle.
Fig. 5 is the characteristic curve schematic diagram of spring-quality system.
Fig. 6 is that a kind of machinery adjusts Q to design displacement-frequency characteristics schematic diagram.
Fig. 7 is the laser pulse schematic diagram that the utility model exports.
Mark in figure: jointed fiber laser 1, adjust Q system 2, band tail optical fiber semiconductor pump laser 3, optical-fiber bundling device (combiner or WDM) 4, high reflectance Fiber Bragg Grating FBG 5, yb-doped double-clad fiber 6, adjusts Q system 7, piezoelectric element modulation signal drive circuit 8, antiradar reflectivity Fiber Bragg Grating FBG 9, pressure head 101, pad 102, piezoelectric element 103, stretching bar 104, spheric washer 105, adjusting washer (disk) 106, pressing plate 107, screw 108, support 109, laser fiber 202, substrate 201.
Embodiment
Be further described below in conjunction with the holy the utility model of accompanying drawing.
Q system adjusted by a kind of machinery for fiber laser, comprise jointed fiber laser 1 and adjust Q system 2 two parts, it is characterized in that jointed fiber laser 1 comprises: the pumping semiconductor laser 3 of band tail optical fiber, its output tail optical fiber is connected to the pumping input port of optical-fiber bundling device 4, the output optical fibre port of optical-fiber bundling device 4 connects high anti-Fiber Bragg Grating FBG 5, the other end and the yb-doped double-clad fiber 6 of grating 5 weld together, the other end of yb-doped double-clad fiber 6 with write the low anti-Fiber Bragg Grating FBG 7 be formed on polarization maintaining optical fibre and weld mutually, Q system 8 adjusted by the machinery having modulated laser pulse to export between yb-doped double-clad fiber 6 and low anti-Fiber Bragg Grating FBG 7, machinery adjusts the piezoelectric element in Q system 8 to be controlled by drive circuit 9, modulation signal drive circuit 9 is used for driving piezoelectric element periodically to press chamber inner fiber with polarisation of light direction in buncher, low anti-Fiber Bragg Grating FBG 7 other end is the output of fiber laser.
As shown in Figure 2, Q system adjusted by a kind of machinery by multiple component installaiton.Part comprises: pressure head 101, pad 102, piezoelectric element 103, stretching bar 104, spheric washer 105, adjusting washer (disk) 106, pressing plate 107, screw 108 and support 109.Wherein pressure head 101, stretching bar 104 and support 109 are the different piece of same machine components.Adjust piezoelectric element 103 in Q process longitudinally changing length by current drives, thus cause pressure head 101 to move up and down.In the above system corresponding diagram 17.
Laser fiber 202, (in corresponding diagram (1) 6) are fixed in the U-lag on substrate 201.The substrate 201 of aforementioned tune Q system and jointed fiber laser in conjunction with time, the above-mentioned pressure head of designing requirement 101 is positioned at position close above distance lasers optical fiber 202.When piezoelectric element 103 stretches by drive current effect, above-mentioned pressure head 101 moves up and down.Laser fiber 202 because being squeezed in the stroke range of pressure head 101, thus reaches the effect that Q adjusted by laser.
Specific design principle is as follows:
For realizing high-frequency stabilization modulation, in the past complicated mechanical system is become simple spring-quality system by the utility model, sees Fig. 4.The wherein corresponding pressure head 101 of quality 301.Its quality is m.Spring 302 pairs of strain stretch bars 104.Four stretching bars altogether, coefficient of elasticity is k.The effect of piezoelectric element 103 is reduced to the power 303 by just profound equation change.304 is the fixing point of simple spring-quality system, corresponding pedestal 109.
What Fig. 5 showed is the indicatrix being with the spring-quality system (Fig. 4) of decaying.Can see that displacement is not with frequency shift in frequency lower region 305.Then displacement raises with frequency increases, and when frequency is resonance frequency 306, displacement peaks.Then reduce with frequency.Frequency modulation range of the present utility model is at geostationary low frequency region 305.In order to increase applicable upper frequency limit, the target of design improves resonance frequency.The computing formula of resonance frequency Fn is:
Fn=1/2πsqrt(k/m)
Wherein k is the coefficient of elasticity of spring, and m is quality.
Resonance frequency to be improved as can be seen here in the design need to increase coefficient of elasticity k, reduce quality m.
What Fig. 6 showed is a kind of modulation characteristics curve realized of the present utility model.Can see in low-frequency range displacement not with frequency change.Available modulation frequency range is 0 ~ 50000Hz.Resonance frequency is about 700000Hz.As mentioned above, the utility model can regulate resonance frequency and modulation range by changing Machine Design.
What Fig. 7 showed is the laser pulse signal that the utility model exports.
The utility model has the advantage of that it is applied to the pulse laser system of single-frequency all-fiber, there is excellent modulating characteristic, reliable and stable, safeguard simple.
Claims (2)
1. Q system adjusted by the machinery for fiber laser, comprise jointed fiber laser and adjust Q system two parts, it is characterized in that jointed fiber laser comprises: the pumping semiconductor laser of band tail optical fiber, its output tail optical fiber is connected to the pumping input port of optical-fiber bundling device, the output optical fibre port of optical-fiber bundling device connects high anti-Fiber Bragg Grating FBG, the other end and the yb-doped double-clad fiber of grating weld together, the other end of yb-doped double-clad fiber with write the low anti-Fiber Bragg Grating FBG be formed on polarization maintaining optical fibre and weld mutually, Q system adjusted by the machinery having modulated laser pulse to export between yb-doped double-clad fiber and low anti-Fiber Bragg Grating FBG, machinery adjusts the piezoelectric element in Q system to be controlled by drive circuit, modulation signal drive circuit is used for driving piezoelectric element periodically to press chamber inner fiber with polarisation of light direction in buncher, the low anti-Fiber Bragg Grating FBG other end is the output of fiber laser.
2. Q system adjusted by a kind of machinery for fiber laser according to claim 1, it is characterized in that adopting the combination of mechanical structure and piezoelectric ceramic to realize precompressed to piezoelectric ceramic.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420788837.2U CN204243448U (en) | 2014-12-15 | 2014-12-15 | Q system adjusted by a kind of machinery for fiber laser |
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| CN201420788837.2U CN204243448U (en) | 2014-12-15 | 2014-12-15 | Q system adjusted by a kind of machinery for fiber laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466638A (en) * | 2014-12-15 | 2015-03-25 | 山东海富光子科技股份有限公司 | Mechanical tuning Q system for optical fiber laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466638A (en) * | 2014-12-15 | 2015-03-25 | 山东海富光子科技股份有限公司 | Mechanical tuning Q system for optical fiber laser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Mechanical tuning Q system for optical fiber laser Effective date of registration: 20151016 Granted publication date: 20150401 Pledgee: Weihai commercial bank Limited by Share Ltd Pledgor: Shandong Haifu Photon Technology Co., Ltd. Registration number: 2015990000870 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20171107 Granted publication date: 20150401 Pledgee: Weihai commercial bank Limited by Share Ltd Pledgor: Shandong Haifu Photon Technology Co., Ltd. Registration number: 2015990000870 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Mechanical tuning Q system for optical fiber laser Effective date of registration: 20171107 Granted publication date: 20150401 Pledgee: Weihai City Commercial Bank Limited by Share Ltd high tech branch Pledgor: Shandong Haifu Photon Technology Co., Ltd. Registration number: 2017990001036 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20211014 Granted publication date: 20150401 Pledgee: Weihai City Commercial Bank Limited by Share Ltd. high tech branch Pledgor: HFB Photonics Co.,Ltd. Registration number: 2017990001036 |