CN104993369B - It is a kind of that the darkening bleaching system safeguarded and method are darkened based on optical fiber laser - Google Patents
It is a kind of that the darkening bleaching system safeguarded and method are darkened based on optical fiber laser Download PDFInfo
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- CN104993369B CN104993369B CN201510354909.1A CN201510354909A CN104993369B CN 104993369 B CN104993369 B CN 104993369B CN 201510354909 A CN201510354909 A CN 201510354909A CN 104993369 B CN104993369 B CN 104993369B
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Abstract
The invention discloses a kind of photon to darken bleaching system, to solve the situation for lacking intervention of the photon the Opacitization in Yb dosed optical fiber laser running at present.The present invention includes darkening bleaching light source and its driving power.The present invention be inside ytterbium-doping optical fiber laser on increase a set of darkening bleaching system, therefore do not change the agent structure of optical fiber laser, there is high applicability.Periodic darkened to optical fiber laser that apparatus of the present invention are particularly suitable in work is bleached, and promotes the stability using process power of optical fiber laser, be slow down laser photonic and is darkened process, improves the service life of laser.
Description
Technical field
The invention belongs to optical fiber laser field, darkens and bleaches more particularly, to a kind of ytterbium-doping optical fiber laser photon
Apparatus and method.
Background technology
Ytterbium ion has the advantages such as level structure is simple, fluorescence lifetime is long, quantum defect is small under excitation state, and is made with quartz
There is high laser damage threshold for the optical fiber of matrix, thus mix ytterbium silica fibre and be widely used in preparing various high power lights
Fibre laser and amplifier system.And its operation wavelength of this system is in 1.0um to 1.1um, there is greatly practicality and wide
Wealthy application prospect, it is widely used in material processing, laser weapon, Photobiology and medical science etc..With semiconductor pumping sources,
The continuous development of the technology such as pump coupling and fiber design preparation, mix the output of ytterbium quartz fiber laser and amplifier system
Power has been obtained greatly being lifted, and hundred kilowatts of current magnitudes have been risen to from watt magnitude of early stage.
But in recent years this high power laser system in the application, its power output with run time increase and reduce
Phenomenon is constantly observed.This power attenuation causes system deficient in stability, working life short, and limit system power enters one
The soaring expansion with application field and scope of step.To solve the problems, such as power attenuation, i.e. photodarkening effect, numerous colleges and universities both at home and abroad,
Research institution and company have all carried out the research of correlation.
The research darkened to photon concentrates on two aspects and come both at home and abroad, first, demarcation and measurement that photon darkens, pass through
The effective of size is darkened to photon accurately to measure to be controlled in the selection of gain fibre, and then selects low photon to darken
The Yb dosed optical fiber of characteristic ensures the performance of laser, as patent 201210292916X is given a kind of photon darkens test
Apparatus and method.Article J.J.Koponen, M.J.S.K.T.Tammela et al..Photodarkening
in ytterbium-doped silica fibers[C].SPIE,2005,5990:599008.1-599008.10 propose one
Kind is used to demarcate single-mode ytterbium-doping optical fiber and Double Cladding Ytterbium Doped Fiber photon darkens the technology of characteristic.
Second aspect is in terms of concentrating on the making of Active Optical Fiber prefabricated rods.The formation mechenism darkened by studying photon,
Front end is prepared from prefabricated rods to be intervened, and suppresses the generation that photon darkens.Specifically include the codope of ion, patent
Zl201110076289.1, optical fiber is darkened to eliminate colour center and then develop low photon using codope cerium ion.Article
Mattsson K E.The three-electron bond=Si<O2:.Yb absorption center of pre-
darkened ytterbium-doped silica[J].Optics Express.2013,21(10):12849~12864. grind
It is that colour center causes optical fiber to produce permanent optical loss in visible ray near infrared spectral range to have studied carefully, and output laser power reduces
Show as photon and darken effect.
The research of mechanism either is darkened to photon, low photon darkening optical fiber is prepared using co-dopant ions, or soon
The stable photon of speed darkens method of testing, and can only all realize Yb dosed optical fiber used in guarantee optical fiber laser is low photon as far as possible
Darken characteristic, but optical fiber once it is determined that, laser darkens caused by using process can not just regulate and control；And optical fiber laser is current
Center wave band is not used also to darken what bleaching light source was bleached for 793nm and 808nm.In summary, by the end of current
After research and achievement can not all improve and be assembled into optical fiber laser complete machine, in use to photon in ytterbium-doping optical fiber laser
The Opacitization is intervened and optimization processing.
The content of the invention
For problems of the prior art, the application provides a kind of based on the dark of optical fiber laser darkening maintenance
Change bleaching system and method, wherein by the way that the concrete structure and its set-up mode that darken bleaching system are studied and be related to,
It should be able to mutually realize that photon is bleached in more compact construction, be easier to existing product to the optical fiber laser after assembling,
Photon the Opacitization is intervened in use and optimization processing.
To achieve the above object, according to one aspect of the present invention, there is provided a kind of optical fiber laser, it is characterised in that：
The laser includes：Bleaching system is darkened, the device is formed by darkening bleaching light source and driving power.
Preferably, the optical fiber laser is ytterbium-doping optical fiber laser；
Preferably, the output optical fibre of darkening bleaching light source is connected with bundling device in the laser, the class of the output optical fibre
Type is identical with the type of bundling device in the laser；
Preferably, darkening bleaching light source is the semiconductor laser light source with optical fiber output；
Preferably, can should be 793nm, 808nm with the center wave band of the semiconductor laser light source of optical fiber output；Compare
Other center wave bands darken bleaching recovery extent and return to 30% or so, and center wave band 793nm, 808nm can reach 70% or so.
It is another aspect of this invention to provide that provide a kind of darkening method for bleaching of optical fiber laser, it is characterised in that：Tool
Body comprises the following steps：
(1) high power fiber laser closes pump light after pumping works a period of time；
(2) open darken bleaching light source drive power, adjust input power power, make center wave band for 793nm, 808nm,
543nm, 633nm darkening bleaching light source are started working, and are continuously worked multiple hours, are closed and darken bleaching light source；
(3) optical fiber laser normal work is reopened, when the laser works time reaching schedule operating time, is closed
Laser pump light, repeat step (2)；
(4) constantly recover to darken according to the space requirement of laser works period, repeated multiple times repeat step (1) and (2)
The loss brought, slow down laser and darken process.
In general, according to above-mentioned technical concept of the invention compared with prior art, it is excellent mainly to possess following technology
Point：
1st, apparatus of the present invention are optical fiber laser bleaching system, can be used in ten watts, hectowatt or even upper kilowatt optical fiber
In laser, can share a fit beam system with former optical fiber laser has higher Stability and adaptability；
2nd, the device has high integrated level, easy to operate.Optical fiber laser complete machine using process can be carried out dark
Change bleaching, photon the Opacitization caused by optical fiber bleached by periodically opening, slow down optical fiber laser and darken process,
It ensure that the stability of optical fiber laser laser output power；
3rd, photon of the invention, which darkens bleaching system, can use multi-wavelength, the bleaching light source of different capacity, these ripples
The current all technology maturation stable performances of long light source are high.
Brief description of the drawings
Fig. 1 is the darkening bleaching system structural representation that present example provides；
Fig. 2 is the darkening bleaching system structural representation provided for present example；
Fig. 3 is that 793nm bleaches light source to ytterbium-doping optical fiber laser darkening maintenance, and added losses change is bent caused by darkening
Line；
Fig. 4 is that 808nm bleaches light source to ytterbium-doping optical fiber laser darkening maintenance, and added losses change is bent caused by darkening
Line.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Conflict can is not formed each other to be mutually combined.
As depicted in figs. 1 and 2, the darkening bleaching system that present example provides, including bleaching light source and its driving power.
The driving power that Fig. 2 displays darken bleaching light source can use same driving power and control mould with pump source of optical fiber laser
Block.
The output optical fibre for darkening bleaching light source is connected with bundling device in laser, and the type and Yb dosed optical fiber of output optical fibre swash
The fiber type of bundling device is consistent in light device.
As shown in figure 3, during laser use under 915nm pumping conditions after pumping for a period of time, optical fiber laser
The gain media Yb dosed optical fiber additional attenuation caused by photon darkens become larger, mentioned again using the present invention afterwards
After 793nm darkening bleaching light sources carry out darkening bleaching, the obvious reduction of the added losses as caused by darkening is found.Repeatedly follow
Ring, darkening bleaching process is realized, the darkening for having reached laser is safeguarded.
Fig. 4 is given in 915nm pumped optical fibre lasers, is mentioned 808nm darkening bleaching light sources using the present invention and is floated
In vain, test to obtain the change curve of optical fiber added losses caused by optical fiber darkness by darkening test device.
Example one：
The operation instruction that laser photonic darkening bleaching is carried out using darkening bleaching system of the present invention is as follows；
30w mixes ytterbium laser works when work reaches 300h, is closed in pump light (915nm or 975nm pumping sources)
In the case of, open and darken bleaching light source drive power, adjust input power power, darkened and bleached in 793nm using centre wavelength
Light source output power is 5 watts, continuous working 12 hours.Close and darken bleaching light source drive power, swash again according to Yb dosed optical fiber
Light device requirement is used.When having worked 300h, 30w ytterbium-doping optical fiber lasers power drop to 29w.Using the present invention
After the darkening bleaching system carries out darkening bleaching, power returns to 29.7 watts, darkens bleaching recovery extent to reach 70%.
Optical fiber laser in engineer applied when working small to 600 after, repeat the above steps, work repeats when reaching 900h again,
By that analogy, can be reached to being bleached using darkening caused by process using apparatus of the present invention, the photon that can slow down darkens
Process.
Example two：
The operation instruction that laser photonic darkening bleaching is carried out using darkening bleaching system of the present invention is as follows；
100w mix ytterbium laser pumping work reach 150h when, in pump light 15nm or 975nm pumping source) close feelings
Under condition, open and darken bleaching light source drive power, adjust input power power, bleaching light is darkened in 808nm using centre wavelength
Source power output is 12 watts, continuous working 12 hours.Close and darken bleaching light source drive power, again according to Yb dosed optical fiber laser
Device requirement is used.The ytterbium-doping optical fiber laser before and after increasing darkening bleaching system of the present invention and carrying out darkening bleaching
Power attenuation recovery rate 68% caused by darkening.After optical fiber laser work to 300h, repeat the above steps, final realize subtracts
The process that slow optical fiber laser photon darkens.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., all should be included
Within protection scope of the present invention.
Claims (4)
1. the photon during a kind of optical fiber laser use darkens method for bleaching, it is characterised in that：Specifically include following steps：
(1) high power fiber laser closes pump light after pumping works a period of time；
(2) open and darken bleaching light source drive power, adjust input power power, it is the dark of 793nm, 808nm to make center wave band
Change bleaching light source to start working, continuously work multiple hours, close and darken bleaching light source.
2. a kind of optical fiber laser that can be realized photon in use and darken bleaching, the optical fiber laser include：Pumping source,
Resonator, it is characterised in that：The optical fiber laser also includes the optical fiber laser can be made to realize that photon darkens in use
The device of bleaching, the device are formed by darkening bleaching light source and driving power；The darkening bleaches light source with optical fiber output
Semiconductor laser light source, its center wave band are 793nm, 808nm.
3. optical fiber laser as claimed in claim 2, it is characterised in that：The optical fiber laser is ytterbium-doping optical fiber laser.
4. the optical fiber laser as claimed in claim 2, it is characterised in that：The output optical fibre and the optical fiber of darkening bleaching light source
Bundling device is connected in laser, and the type of the output optical fibre is identical with the type of bundling device in the optical fiber laser.
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| CN201510354909.1A CN104993369B (en) | 2015-06-24 | 2015-06-24 | It is a kind of that the darkening bleaching system safeguarded and method are darkened based on optical fiber laser |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109975922B (en) * | 2019-03-29 | 2020-11-24 | 华中科技大学 | Light reinforcement method and system for improving photon darkening performance of active optical fiber |
| CN110247292B (en) * | 2019-07-04 | 2021-04-13 | 华中科技大学鄂州工业技术研究院 | Device and method for inhibiting photodarkening and photodarkening bleaching |
| CN115057631B (en) * | 2022-04-26 | 2024-02-02 | 苏州创鑫激光科技有限公司 | Bleaching method and device for reducing photodarkening induced loss |
Citations (3)
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|---|---|---|---|---|
| US6452717B1 (en) * | 1999-02-05 | 2002-09-17 | Sumitomo Electric Industries, Ltd. | Fiber optic amplifier |
| CN101796697A (en) * | 2007-07-16 | 2010-08-04 | 科拉克蒂夫高科技公司 | Luminescent device with phosphosilicate glass |
| CN103951267A (en) * | 2013-11-19 | 2014-07-30 | 山东海富光子科技股份有限公司 | Silicate full-glass optical fiber for high-power optical fiber laser |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5171543B2 (en) * | 2008-10-22 | 2013-03-27 | 浜松ホトニクス株式会社 | Fiber optic device and driving method thereof |
| US8711896B2 (en) * | 2010-01-05 | 2014-04-29 | Kla-Tencor Corporation | Alleviation of laser-induced damage in optical materials by suppression of transient color centers formation and control of phonon population |
| US8908263B2 (en) * | 2011-06-17 | 2014-12-09 | Jds Uniphase Corporation | Large mode area optical waveguide devices |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6452717B1 (en) * | 1999-02-05 | 2002-09-17 | Sumitomo Electric Industries, Ltd. | Fiber optic amplifier |
| CN101796697A (en) * | 2007-07-16 | 2010-08-04 | 科拉克蒂夫高科技公司 | Luminescent device with phosphosilicate glass |
| CN103951267A (en) * | 2013-11-19 | 2014-07-30 | 山东海富光子科技股份有限公司 | Silicate full-glass optical fiber for high-power optical fiber laser |
Non-Patent Citations (1)
| Title |
|---|
| 掺稀土光纤的光子暗化研究进展;尤洁等;《激光与光电子学报》;20131229;全文 * |
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