CN205159781U - Laser spectrum power synthesis system - Google Patents
Laser spectrum power synthesis system Download PDFInfo
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- CN205159781U CN205159781U CN201520850789.XU CN201520850789U CN205159781U CN 205159781 U CN205159781 U CN 205159781U CN 201520850789 U CN201520850789 U CN 201520850789U CN 205159781 U CN205159781 U CN 205159781U
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Abstract
The utility model discloses a laser spectrum power synthesis system relates to the synthetic field of laser spectrum power, the system includes: spectrum power synthesis module, light sample thief and a plurality of light source module, a plurality of light source module all with the coupling of spectrum power synthesis module, spectrum power synthesis module with the coupling of light sample thief, light the sample thief respectively with a plurality of light source module couplings. Compare with prior art's spectrum power synthesis system, based on the laser spectrum power synthetic method of sampling feedback, effectively avoided the optic fibre bragg grating easily to lead to the defect of spectrum mismatch and laser beam quality degradation to the discordance of preparation, effectively improved synthetic laser beam's quality, compare with the synthesis system 0 of phase modulation spectrum widening's method with current single frequency laser, synthesis system 1, it is with low costs.
Description
Technical field
The utility model relates to laser spectroscopy power combing field, in particular to a kind of laser spectroscopy power synthetic system.
Background technology
The high-quality high-average power laser of continuous wave work has important using value at industry, national defence and scientific research field.The advantages such as fiber laser has high efficiency, compact conformation, high laser beam quality, flexible transfer, heat radiation is good, spectral region is wide and non-maintaining, start extensive employing in many laser applications.But be limited to the factors such as nonlinear effect in optical fiber and the pumping source brightness that can inject, separate unit fiber laser power output is limited, only has thousands of watts.At the more high-power application scenarios of needs, adopting multiple stage fiber laser to carry out power combing is inevitable choice.Concrete technological approaches comprise geometry and restraint, optics coherence tomography and Spectral beam combining.Geometry also bundle the most easily realizes technically, but laser beam quality is poor, is not suitable for the occasion higher to laser beam quality requirements.Optics coherence tomography can obtain good laser beam quality and peak light intensity, but harsh to the requirement of separate unit fiber laser, causes separate unit laser output power seriously limited, and the system scale that obtain larger power needs is huge, and technical difficulty is the highest.Comparatively speaking, Spectral beam combining technical difficulty is moderate, and laser beam quality also can be guaranteed, and is current most potential power combining methods.The principle of spectral power synthetic method is the spectral dispersion effect utilizing dispersive medium (such as multi-layer dielectric gratings or Volume Bragg grating etc.), by a branch of for the laser beam synthesis being operated in the multiple stage narrow linewidth laser of different wave length in doped fiber gain bandwidth of careful design and keep that laser beam quality is not deteriorated or deterioration is less, thus realize the power in aperture and the lifting of light intensity altogether.
Spectral power synthetic method needs the centre wavelength and the live width that accurately control separate unit fiber laser, the centre wavelength that current separate unit fiber laser exports and live width control method mainly contain two kinds, be the method adopting single frequency laser to add phase-modulation spectrum widening, another kind utilizes to control based on the oscillator that narrow linewidth Fiber Bragg Grating FBG is right.
But the light-source system adding the method for phase-modulation spectrum widening based on single frequency laser is complicated, and cost is high, is not suitable for for large scale system, and Fiber Bragg Grating FBG is to the easy derivative spectomstry mismatch of inconsistency made and laser beam quality deterioration.
Utility model content
The purpose of this utility model is to provide a kind of laser spectroscopy power synthetic system, effectively to improve the laser beam quality of existing spectral power synthesis and effectively to reduce the cost of existing spectral power synthesis system.
First aspect, the utility model embodiment provides a kind of laser spectroscopy power synthetic system, comprise: spectral power synthesis module, for belonging to the optical sampler of the laser beam of presumptive area and multiple light source module to obtaining intensity in laser beam that described spectral power synthesis module exports, described multiple light source module is all coupled with described spectral power synthesis module, described spectral power synthesis module is coupled with described optical sampler, and described optical sampler is coupled with described multiple light source module respectively.
In conjunction with first aspect, the utility model embodiment still provides the first possibility execution mode of first aspect, wherein, also comprises: sampling spectroscope, described spectral power synthesis module is coupled with described sampling spectroscope, and described sampling spectroscopical sampling output is coupled with described optical sampler.
May execution mode in conjunction with the first of first aspect or first aspect, the utility model embodiment still provides the second possibility execution mode of first aspect, wherein, the intensity of described laser beam belongs to that presumptive area comprises centered by the centre wavelength of described laser beam take pre-set bandwidths as the intensity highest zone of the described laser beam that width delimited.
In conjunction with the second possibility execution mode of first aspect, the utility model embodiment still provides the third possibility execution mode of first aspect, wherein, described light source module comprises fibre laser oscillator and power amplifier, described fibre laser oscillator is coupled with described power amplifier, described power amplifier is coupled with described spectral power synthesis module, and described optical sampler is coupled with described fibre laser oscillator.
In conjunction with the third possibility execution mode of first aspect, the utility model embodiment still provides the 4th kind of possibility execution mode of first aspect, wherein, also comprise fiber optic splitter, described optical sampler is coupled with described fiber optic splitter, and described fiber optic splitter is coupled with multiple described fibre laser oscillator respectively.
In conjunction with the 4th kind of possibility execution mode of first aspect, the utility model embodiment still provides the 5th kind of possibility execution mode of first aspect, wherein, also comprise the first energy transmission optical fibre, described optical sampler is coupled with described fiber optic splitter by described first energy transmission optical fibre.
In conjunction with the 5th kind of possibility execution mode of first aspect, the utility model embodiment still provides the 6th kind of possibility execution mode of first aspect, wherein, also comprise the second energy transmission optical fibre, described second energy transmission optical fibre is identical with described fibre laser oscillator quantity, and described fiber optic splitter is coupled with each described fibre laser oscillator by described second energy transmission optical fibre.
In conjunction with the 6th kind of possibility execution mode of first aspect, the utility model embodiment still provides the 7th kind of possibility execution mode of first aspect, and wherein, described optical sampler is positioned at the near field end of the laser beam that described spectral power synthesis module exports.
In conjunction with the 7th kind of possibility execution mode of first aspect, the utility model embodiment still provides the 8th kind of possibility execution mode of first aspect, wherein, described optical sampler comprises diaphragm and coupled lens, described luminous power synthesis module is coupled with described diaphragm, and described diaphragm is coupled with described coupled lens.
In conjunction with the 8th kind of possibility execution mode of first aspect, the utility model embodiment also provides the 9th kind of possibility execution mode of first aspect, and wherein, described spectral power synthesis module comprises Volume Bragg grating.
The utility model embodiment, the wavelength of the light source that each light source module produces is different with live width, therefore, when the laser beam that multiple described light source module produces being synthesized a laser beam by spectral power synthesis module, different wavelength is spatially separated, wherein, the intensity highest zone of synthetic laser light beam represents the region that laser beam degree of overlapping that each light source module produces is the highest, also be centre wavelength and the live width of the laser beam that corresponding each light source module produces, the laser beam be used for described spectral power synthesis module exports by optical sampler is sampled, obtain intensity in the laser beam of described spectral power synthesis module output and belong to the laser beam of presumptive area, wherein, described intensity belongs to presumptive area can for the region with certain live width centered by centre wavelength.Again by sample obtain laser beam feed back to described multiple light source module respectively, each described light source module is used for the wavelength and the live width that adjust Output of laser light beam according to obtained feedback laser light beam, therefore, can change centre wavelength and the live width of light source module, the operating state realizing fibre laser oscillator changes to the direction of improving synthetic laser beam quality and automatically locks.
In the spectral power synthesis system of prior art, require very high to the centre wavelength of grating pair and Line-width precision, manufacture difficulty, and in use because the impact of temperature drift and vibrations needs to carry out real-time feedback control and the system complex caused, therefore, compared with the spectral power synthesis system of prior art, based on the laser spectroscopy power combining methods of sampling feedback, effectively prevent the inconsistency easy derivative spectomstry mismatch of Fiber Bragg Grating FBG to making and the defect of laser beam quality deterioration, effectively improve the quality of synthetic laser light beam, compared with the light-source system adding the method for phase-modulation spectrum widening with existing single frequency laser, structure is simple, cost is low.
Other feature and advantage of the present utility model are set forth at specification subsequently, and, partly become apparent from specification, or understand by implementing the utility model embodiment.The purpose of this utility model and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.Shown in accompanying drawing, above-mentioned and other object of the present utility model, Characteristics and advantages will be more clear.Reference numeral identical in whole accompanying drawing indicates identical part.Deliberately do not draw accompanying drawing by actual size equal proportion convergent-divergent, focus on purport of the present utility model is shown.
Fig. 1 shows the structure chart of the embodiment of a kind of laser spectroscopy power synthetic system that the utility model embodiment provides.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, carry out clear, complete description to the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment is in order to overcome the existing light-source system complexity adding the method for phase-modulation spectrum widening based on single frequency laser, cost is high, be not suitable for for large scale system, and the inconsistency easy derivative spectomstry mismatch of Fiber Bragg Grating FBG to making and the defect of laser beam quality deterioration, provide a kind of laser spectroscopy power synthetic system, as shown in Figure 1, described system comprises: spectral power synthesis module 103, optical sampler 105 and multiple light source module 100, described multiple light source module 100 is all coupled with described spectral power synthesis module 103, described spectral power synthesis module 103 is coupled with described optical sampler 105, described optical sampler 105 is coupled with described multiple light source module 100 respectively.
In the utility model embodiment, described light source module 100 is the laser that can produce laser beam, described light source module 100 can be made up of high-power oscillator, also can be made up of fibre laser oscillator 101 and power amplifier 102, the wavelength of the light beam that each light source module 100 reality produces may be not quite similar.
As shown in Figure 1, described light source module 100 comprises fibre laser oscillator 101 and power amplifier 102, described fibre laser oscillator 101 is coupled with described power amplifier 102, and described power amplifier 102 is coupled with described spectral power synthesis module 103.
Described fibre laser oscillator 101 is for generation of low power sources as seed light source, and wherein, each fibre laser oscillator 101 can utilize the fiber grating pair of careful design to realize the Laser output of specific centre wavelength and live width.It should be noted that, the centre wavelength of the laser that each fibre laser oscillator 101 reality exports and live width may be not quite similar.
Described power amplifier 102 carries out power amplification for the low power sources exported described fibre laser oscillator 101, in the utility model embodiment, described power amplifier 102 can for the amplifier utilizing rare earth doped fiber gain media to realize the amplification of laser power, such as, can be erbium-doped fiber amplifier.Described power amplifier 102 can keep the centre wavelength of laser constant as far as possible, and live width broadening is less, avoids destructive nonlinear effect simultaneously.
The laser beam that multiple described power amplifier 102 exports can be synthesized a laser beam by spectral power synthesis module 103, thus realizes power and the light intensity lifting in aperture altogether.In the utility model embodiment, described spectral power synthesis module 103 can comprise Volume Bragg grating, by the laser beam of different wave length after dispersion, realize the power superposition in far field, other have the components and parts of dispersion function can certainly to comprise plane grating or prism etc.
Described optical sampler 105 samples for the laser beam exported described spectral power synthesis module 103, obtain intensity in the laser beam that described spectral power synthesis module 103 exports and belong to the laser beam of presumptive area, and then by sample acquisition laser beam feed back to described multiple light source module 100 respectively.
In the utility model embodiment, described optical sampler 105 can comprise diaphragm and coupled lens, the intensity of the laser beam exported by spectral power synthesis module 103 described in diaphragm filtering belongs to the part outside presumptive area, by described coupled lens, intensity is belonged to the laser coupled of presumptive area to described multiple fibre laser oscillator, wherein, the intensity of described laser beam belongs to presumptive area is be the intensity highest zone of the described laser beam that width delimited centered by the centre wavelength of described laser beam, with pre-set bandwidths.
Centre wavelength and the live width of the laser exported because each fibre laser oscillator 101 is actual may be not quite similar, when described spectral power synthesis module 103 makes different wavelength spatially launch, being partly superimposed together of phase co-wavelength of each different laser of input, then the intensity in the region that multiple laser beam degrees of overlapping of different wave length are the highest is the highest, therefore, the centre wavelength of the corresponding each fibre laser oscillator of intensity highest zone of laser beam that exports of described spectral power synthesis module and live width.
By optical sampler 105, the laser beam that described spectral power synthesis module 103 exports is sampled, obtain intensity in the laser beam of described spectral power synthesis module 103 output and belong to the laser beam of presumptive area.
Optical sampler 105 again by sample obtain laser beam feed back to described multiple light source module 100 respectively, each described light source module 100 is for adjusting wavelength and the live width of Output of laser light beam according to obtained feedback laser light beam, thus changing centre wavelength and the live width of light source module 100, the operating state realizing fibre laser oscillator 101 changes to the direction of improving synthetic laser beam quality and automatically locks.
Further, in order to the laser beam realized described spectral power synthesis module 103 exports carries out near field sampling, as shown in Figure 1, described laser spectroscopy power synthetic system can also comprise sampling spectroscope 104.Described spectral power synthesis module 103 is coupled with described sampling spectroscope 104, and the sampling output of described sampling spectroscope 104 is coupled with described optical sampler 105.Described sampling spectroscope 104 separates a branch of sub-laser beam for the near field of the laser beam exported by described spectral power synthesis module 103, and described sub-laser beam is inputted described optical sampler 105 by described sampling output.Wherein, described sub-laser beam is consistent with the parameter characteristic of the laser beam that described spectral power synthesis module 103 exports, and described sub-laser beam is a part for the laser beam that described spectral power synthesis module 103 exports.
Described optical sampler 105, specifically for sampling described sub-laser beam, obtains the fraction of laser light light beam of the described intensity highest zone in described sub-laser beam, by sample obtain laser beam feed back to described multiple light source module 100 respectively.
Further, the utility model embodiment can also comprise fiber optic splitter 107, described optical sampler 105 is coupled with described fiber optic splitter 107, described fiber optic splitter 107 is coupled with multiple described fibre laser oscillator 101 respectively, input laser beam is divided into multiple identical sub-bundle by described fiber optic splitter 107, is input to respectively in multiple described fibre laser oscillator 101.
In the utility model embodiment, described optical sampler 105, between fiber optic splitter 107 and multiple described fibre laser oscillator 101 be coupled through energy transmission optical fibre coupling, described energy transmission optical fibre can realize higher Laser energy transmission, reduces the energy loss of laser beam when transmitting.
As shown in Figure 1, described optical sampler 105, can be coupled by the first energy transmission optical fibre 106 and the second energy transmission optical fibre 108 between fiber optic splitter 107 and multiple described fibre laser oscillator 101.Concrete, described optical sampler 105 is coupled with described fiber optic splitter 107 by described first energy transmission optical fibre 106, described second energy transmission optical fibre 108 is identical with described fibre laser oscillator 101 quantity, and described fiber optic splitter 107 is coupled with each described fibre laser oscillator 101 by described second energy transmission optical fibre 108.
In sum, the utility model embodiment fibre laser oscillator 101 described in each produces multiple low power sources as multiple seed light source, described power amplifier 102 carries out power amplification to the low power sources that described fibre laser oscillator 101 exports, by spectral power synthesis module 103, the laser beam that multiple power amplifier 102 exports is combined into a branch of again, the near field of the laser beam that described spectral power synthesis module 103 exports by described sampling spectroscope 104 separates a branch of sub-laser beam, described sub-laser beam is inputted described optical sampler 105 by described sampling output, described optical sampler 105 samples described sub-laser beam, obtain the fraction of laser light light beam of the intensity highest zone in described sub-laser beam, by sample obtain laser beam feed back to described fiber optic splitter 107 respectively, the laser beam of input is divided into multiple identical sub-bundle by described fiber optic splitter 107, be input in multiple described fibre laser oscillator 101 respectively, form adaptive feedback loop, change centre wavelength and the live width of fibre laser oscillator, the operating state realizing fibre laser oscillator changes to the direction of improving synthetic laser beam quality and automatically locks.
Compared with the spectral power synthesis system of prior art, based on the laser spectroscopy power combining methods of sampling feedback, effectively prevent the inconsistency easy derivative spectomstry mismatch of Fiber Bragg Grating FBG to making and the defect of laser beam quality deterioration, effectively improve the quality of synthetic laser light beam, compared with the light-source system adding the method for phase-modulation spectrum widening with existing single frequency laser, structure is simple, and cost is low.
The utility model embodiment still provides a kind of laser spectroscopy power combining methods, be applied to laser spectroscopy power synthetic system, described system comprises: spectral power synthesis module, optical sampler and multiple light source module, described multiple light source module is all coupled with described spectral power synthesis module, described spectral power synthesis module is coupled with described optical sampler, described optical sampler is coupled with described multiple light source module respectively, and described method comprises:
Multiple light source module produces laser beam respectively;
The laser beam that multiple light source module produces is synthesized a laser beam by spectral power synthesis module;
Optical sampler samples the laser beam that described spectral power synthesis module exports, obtain intensity in the laser beam that spectral power synthesis module exports and belong to the laser beam of presumptive area, by sample acquisition laser beam feed back to multiple light source module respectively;
Each light source module is according to the wavelength of obtained feedback laser light beam adjustment Output of laser light beam and live width.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the method for foregoing description, with reference to the corresponding process in aforementioned system, device and unit embodiment, can not repeat them here.
The utility model embodiment still provides another kind of laser spectroscopy power combining methods, be applied to laser spectroscopy power synthetic system, described system comprises: fiber optic splitter, sampling spectroscope, spectral power synthesis module, optical sampler and multiple light source module, wherein, described light source module comprises fibre laser oscillator and power amplifier, each described fibre laser oscillator is coupled with a described power amplifier, multiple described power amplifier is all coupled with described spectral power synthesis module, described optical sampler is coupled with described fiber optic splitter, described fiber optic splitter is coupled with multiple described fibre laser oscillator respectively, described method comprises:
Multiple optical-fiber laser vibration produces low power sources respectively;
Each described power amplifier is to the low power sources power amplification of the described power amplifier of input;
The laser beam that multiple power amplifier exports is synthesized a laser beam by spectral power synthesis module;
The laser beam that spectral power synthesis module exports is separated a branch of sub-laser beam by sampling spectroscope, and described sub-laser beam is inputted described optical sampler;
Described optical sampler samples described sub-laser beam, obtains the laser beam of the intensity highest zone in described sub-laser beam, by sample obtain laser beam feed back to fiber optic splitter;
The feedback laser light beam that described optical sampler exports by fiber optic splitter is divided into the sub-laser beam of multiple identical feedbacks, inputs a sub-laser beam of feedback to each described fibre laser oscillator.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the method for foregoing description, with reference to the corresponding process in aforementioned system, device and unit embodiment, can not repeat them here.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. a laser spectroscopy power synthetic system, it is characterized in that, comprise: spectral power synthesis module, for belonging to the optical sampler of the laser beam of presumptive area and multiple light source module to obtaining intensity in laser beam that described spectral power synthesis module exports, described multiple light source module is all coupled with described spectral power synthesis module, described spectral power synthesis module is coupled with described optical sampler, and described optical sampler is coupled with described multiple light source module respectively.
2. laser spectroscopy power synthetic system according to claim 1, is characterized in that, also comprise: sampling spectroscope, described spectral power synthesis module is coupled with described sampling spectroscope, and described sampling spectroscopical sampling output is coupled with described optical sampler.
3. laser spectroscopy power synthetic system according to claim 1 and 2, it is characterized in that, the intensity of described laser beam belongs to presumptive area and comprises: centered by the centre wavelength of described laser beam, take pre-set bandwidths as the intensity highest zone of the described laser beam that width delimited.
4. laser spectroscopy power synthetic system according to claim 3, it is characterized in that, described light source module comprises fibre laser oscillator and power amplifier, described fibre laser oscillator is coupled with described power amplifier, described power amplifier is coupled with described spectral power synthesis module, and described optical sampler is coupled with described fibre laser oscillator.
5. laser spectroscopy power synthetic system according to claim 4, is characterized in that, also comprise fiber optic splitter, and described optical sampler is coupled with described fiber optic splitter, and described fiber optic splitter is coupled with multiple described fibre laser oscillator respectively.
6. laser spectroscopy power synthetic system according to claim 5, is characterized in that, also comprises the first energy transmission optical fibre, and described optical sampler is coupled with described fiber optic splitter by described first energy transmission optical fibre.
7. laser spectroscopy power synthetic system according to claim 6, it is characterized in that, also comprise the second energy transmission optical fibre, described second energy transmission optical fibre is identical with described fibre laser oscillator quantity, and described fiber optic splitter is coupled with each described fibre laser oscillator by described second energy transmission optical fibre.
8. laser spectroscopy power synthetic system according to claim 7, is characterized in that, described optical sampler is positioned at the near field end of the laser beam that described spectral power synthesis module exports.
9. laser spectroscopy power synthetic system according to claim 8, is characterized in that, described optical sampler comprises diaphragm and coupled lens, and described luminous power synthesis module is coupled with described diaphragm, and described diaphragm is coupled with described coupled lens.
10. laser spectroscopy power synthetic system according to claim 9, is characterized in that, described spectral power synthesis module comprises Volume Bragg grating.
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| CN201520850789.XU CN205159781U (en) | 2015-10-29 | 2015-10-29 | Laser spectrum power synthesis system |
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| CN201520850789.XU CN205159781U (en) | 2015-10-29 | 2015-10-29 | Laser spectrum power synthesis system |
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| CN205159781U true CN205159781U (en) | 2016-04-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112290371A (en) * | 2021-01-04 | 2021-01-29 | 中国工程物理研究院激光聚变研究中心 | Laser beam combining system based on square optical fiber beam combiner |
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2015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112290371A (en) * | 2021-01-04 | 2021-01-29 | 中国工程物理研究院激光聚变研究中心 | Laser beam combining system based on square optical fiber beam combiner |
| CN112290371B (en) * | 2021-01-04 | 2021-03-19 | 中国工程物理研究院激光聚变研究中心 | Laser beam combining system based on square optical fiber beam combiner |
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