CN203631970U - High-power Q-switched pulse optical fiber laser - Google Patents
High-power Q-switched pulse optical fiber laser Download PDFInfo
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- CN203631970U CN203631970U CN201320621695.6U CN201320621695U CN203631970U CN 203631970 U CN203631970 U CN 203631970U CN 201320621695 U CN201320621695 U CN 201320621695U CN 203631970 U CN203631970 U CN 203631970U
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 66
- 239000000835 fiber Substances 0.000 claims abstract description 53
- 238000002310 reflectometry Methods 0.000 claims description 17
- 238000005086 pumping Methods 0.000 claims description 13
- 230000003287 optical effect Effects 0.000 claims description 7
- 229910052689 Holmium Inorganic materials 0.000 claims description 3
- 229910052775 Thulium Inorganic materials 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 3
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000747 cardiac effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000010330 laser marking Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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Abstract
The utility model belongs to the laser technical field and provides a high-power Q-switched pulse optical fiber. The high-power Q-switched pulse optical fiber comprises a main oscillator used for generating seed pulse laser and an optical fiber amplifier which amplifying and outputting the seed pulse laser, wherein the main oscillator comprises a pump source, a beam combiner, a broadband high-reflection mirror, a gain optical fiber, a Q-switched device, a gain flattening filter and a broadband low-reflection mirror; a pump input end of the beam combiner is connected with an output pigtail of the pump source; a signal input end of the beam combiner is connected with the broadband high-reflection mirror; an output end of the beam combiner is connected with the gain optical fiber; and the optical fiber amplifier is a one-stage or multi-stage fiber amplifier. With the high-power Q-switched pulse optical fiber of the utility model adopted, the stimulated Brillouin scattering threshold of the optical fiber can be improved, and stability and reliability can be enhanced.
Description
Technical field
The utility model relates to laser technology field, relates in particular to a kind of high-power Q-switched pulse optical fiber.
Background technology
Along with the development of laser technology, laser processing is also universal gradually, and in laser processing, fiber laser has irreplaceable effect.Current international pulse optical fiber, the technical scheme adopting is that the fiber grating (FBG) of use 1-2nm left and right bandwidth is as the high reflective mirror of resonant cavity, low anti-mirror with the lower fiber grating of the luminance factor of 1-2nm left and right bandwidth as resonant cavity, acoustooptic Q-switching with coupling fiber in resonant cavity is realized q-operation, produce the light pulse of tens nanoseconds arriving hundreds of nanosecond order as seed source, then after one-level or the amplification of secondary double-cladding fiber amplifier, obtain the burnt light pulse to the burnt magnitudes of several millis of several millis at zero point.
But, this poor as the pulse optical fiber temperature stability of speculum with FBG, in the time that environment changes, the centre wavelength of FBG is easy to drift about, cause the centre wavelength of high reflective grid and low reflective grid to exist zero point several nanometers to the deviation of a nanometer, cause the spectral bandwidth of laser to narrow.Thereby can cause, under certain pulse peak power, more easily producing stimulated Brillouin scattering, after rear class is amplified, produce high peak power, easily cause optical fiber to damage, this is also the basic reason of the poor reliability of at present domestic and international pulse optical fiber.
In summary,, obviously there is in actual use inconvenience and defect in existing laser, so be necessary to be improved.
Utility model content
For above-mentioned defect, the purpose of this utility model is to provide a kind of high-power Q-switched pulse optical fiber, can improve optical fiber stimulated Brillouin scattering threshold, strengthens stability and reliability.
To achieve these goals, the utility model provides a kind of high-power Q-switched pulse optical fiber, comprises the master oscillator for generating seed pulse laser and the fiber amplifier for described seed pulse laser amplifier is exported, wherein:
Described master oscillator comprises the low speculum in pumping source, bundling device, Broadband high reflectivity mirror, gain fibre, Q-switching device, gain flattening filter and broadband, the pumping input of described bundling device connects the output tail optical fiber of described pumping source, the signal input part of described bundling device connects described Broadband high reflectivity mirror, and the output of described bundling device connects described gain fibre;
Described fiber amplifier is one or more levels fiber amplifier.
According to high-power Q-switched pulse optical fiber of the present utility model, described fiber amplifier comprises the optical isolator of the retroeflection for preventing described seed pulse laser, and described master oscillator is connected by described optical isolator with fiber amplifier.
According to high-power Q-switched pulse optical fiber of the present utility model, the low speculum in described Broadband high reflectivity mirror/broadband is any one of Volume Bragg grating VBG, volume holographic grating VHG, deielectric-coating mirror or Fiber Bragg Grating FBG speculum.
According to high-power Q-switched pulse optical fiber of the present utility model, the reflection bandwidth of the low speculum of described Broadband high reflectivity mirror and broadband is 100nm.
According to high-power Q-switched pulse optical fiber of the present utility model, described gain fibre is single cladded fiber, doubly clad optical fiber or flat gain type optical fiber.
According to high-power Q-switched pulse optical fiber of the present utility model; described gain fibre can be for Yb dosed optical fiber, Er-doped fiber, thulium doped fiber, mix any one in holmium optical fiber, or described gain fibre is that multiple active ions are mixed single mode or low-order mode optical fiber altogether.
According to high-power Q-switched pulse optical fiber of the present utility model, the low mirror integral setting in described gain flattening filter and broadband.
According to high-power Q-switched pulse optical fiber of the present utility model, described Q-switching device is acoustooptic Q-switching or electro-optical Q-switch.
According to high-power Q-switched pulse optical fiber of the present utility model, described fiber amplifier comprises the collimater for the seed pulse laser alignment after amplifying is exported.
The utility model produces seed pulse laser by master oscillator, and then output after pulse laser being amplified by fiber amplifier.Master oscillator has the low speculum of Broadband high reflectivity mirror and broadband, the reflection bandwidth of the two can reach 100nm, and can bear the peak power of up to a hundred kilowatts and the average power of tens watts, simultaneously in master oscillator, be also provided with gain flattening filter and can regulate the gain spectral distribution of level and smooth laser, more than the pulse laser bandwidth of described master oscillator output can reach 2nm, can significantly improve optical fiber stimulated Brillouin scattering threshold, weaken the stimulated Brillouin scattering that light laser causes in optical fiber.The key difficult problems such as the utility model has mainly solved high-power, the pulse non-linear compression of the lower pulse optical fiber of high-peak power running, thus make system there are higher reliability and stability.
Accompanying drawing explanation
Fig. 1 is high-power Q-switched pulse optical fiber structural representation of the present utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Referring to Fig. 1, the utility model provides a kind of high-power Q-switched pulse optical fiber, this fiber laser 100 comprises master oscillator 10 and fiber amplifier 20, described master oscillator 10 is for generating seed pulse laser, it comprises the low speculum 17 in pumping source 11, bundling device 12, Broadband high reflectivity mirror 13, gain fibre 14, Q-switching device 15, gain flattening filter 16 and broadband, the pumping input of bundling device 12 connects the output tail optical fiber of pumping source 11, signal input part connects Broadband high reflectivity mirror 13, and output connects gain fibre 14.Bundling device 12 can connect multiple pumping sources 11 in order to increase pump power.Fiber amplifier 20 is one or more levels fiber amplifier, for described seed pulse laser is carried out exporting after power amplification.
In embodiment of the present utility model, the centre wavelength of pumping source 11 can be any wavelength within the scope of gain fibre 14 absworption peaks, and it is preferably 915nm/945nm/980nm wavelength any one or a few.Pumping source 11 is for generation of pumping laser, and is converted into pulse laser after other device is processed.
In concrete application; gain fibre 14 can be single cladded fiber, doubly clad optical fiber or flat gain type optical fiber; concrete; gain fibre 14 can be for Yb dosed optical fiber, Er-doped fiber, thulium doped fiber, mix any one in holmium optical fiber; also can be multiple rare earth co-doped fiber (Er/Yb; Tm/Ho etc.), or described gain fibre 14 is mixed single mode or low-order mode optical fiber altogether for multiple active ions.Q-switching device 15 is A-O Q-switch device (acoustooptic Q-switching) or electric-optically Q-switched device (electro-optical Q-switch).
Preferably, the gain flattening filter 16 of master oscillator 10, for regulating the gain spectral distribution of level and smooth laser, makes the output bandwidth of laser broaden whereby.This gain flattening filter 16 can be the filter arranging separately, also can be wholely set with the low speculum 17 in broadband.
More than the pulse laser bandwidth of master oscillator output of the present utility model can reach 2nm, can significantly improve optical fiber stimulated Brillouin scattering threshold, weaken the stimulated Brillouin scattering that light laser causes in optical fiber, solve high-power, the key difficult problems such as the pulse non-linear compression of the lower pulse optical fiber of high-peak power running, improve reliability and stability.Preferably, high-power Q-switched pulse optical fiber of the present utility model can be widely used in industrial every field, as laser marking, and laser cutting etc.
Further, in embodiment of the present utility model, the reflection bandwidth of the low speculum 17 in Broadband high reflectivity mirror 13 and broadband can reach 100nm, for wide spectrum laser generation provides condition, and central cardiac wave personal attendant variations in temperature and can not cause obviously reducing of reflection bandwidth cross section while drifting about.Better, the low speculum 17 in the utility model Broadband high reflectivity mirror 13 and broadband can bear the peak power of up to a hundred kilowatts and the average power of tens watts, and assurance laser can normally be worked under high power running.In addition, Broadband high reflectivity mirror 13 is as end mirror, and its reflectivity can reach 99%, thereby reduces the loss of resonant cavity, increases power output.Preferably, the Broadband high reflectivity mirror 13/ low speculum 17 in broadband adopting in the utility model can be any one of Volume Bragg grating VBG, volume holographic grating VHG, deielectric-coating mirror or Fiber Bragg Grating FBG speculum.
In sum, the utility model produces seed pulse laser by master oscillator, and then output after pulse laser being amplified by fiber amplifier.Master oscillator has the low speculum of Broadband high reflectivity mirror and broadband, the reflection bandwidth of the two can reach 100nm, and can bear the peak power of up to a hundred kilowatts and the average power of tens watts, simultaneously in master oscillator, be also provided with gain flattening filter and can regulate the gain spectral distribution of level and smooth laser, more than the pulse laser bandwidth of described master oscillator output can reach 2nm, can significantly improve optical fiber stimulated Brillouin scattering threshold, weaken the stimulated Brillouin scattering that light laser causes in optical fiber.The key difficult problems such as the utility model has mainly solved high-power, the pulse non-linear compression of the lower pulse optical fiber of high-peak power running, thus make system there are higher reliability and stability.
Certainly; the utility model also can have other various embodiments; in the situation that not deviating from the utility model spirit and essence thereof; those of ordinary skill in the art are when making various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (9)
1. a high-power Q-switched pulse optical fiber, is characterized in that, comprises the master oscillator for generating seed pulse laser and the fiber amplifier for described seed pulse laser amplifier is exported, wherein:
Described master oscillator comprises the low speculum in pumping source, bundling device, Broadband high reflectivity mirror, gain fibre, Q-switching device, gain flattening filter and broadband, the pumping input of described bundling device connects the output tail optical fiber of described pumping source, the signal input part of described bundling device connects described Broadband high reflectivity mirror, and the output of described bundling device connects described gain fibre;
Described fiber amplifier is one or more levels fiber amplifier.
2. high-power Q-switched pulse optical fiber according to claim 1, it is characterized in that, described fiber amplifier comprises the optical isolator of the retroeflection for preventing described seed pulse laser, and described master oscillator is connected by described optical isolator with fiber amplifier.
3. high-power Q-switched pulse optical fiber according to claim 1, it is characterized in that, the low speculum in described Broadband high reflectivity mirror/broadband is any one of Volume Bragg grating VBG, volume holographic grating VHG, deielectric-coating mirror or Fiber Bragg Grating FBG speculum.
4. high-power Q-switched pulse optical fiber according to claim 1, is characterized in that, the reflection bandwidth of the low speculum of described Broadband high reflectivity mirror and broadband is 100nm.
5. high-power Q-switched pulse optical fiber according to claim 1, is characterized in that, described gain fibre is single cladded fiber, doubly clad optical fiber or flat gain type optical fiber.
6. high-power Q-switched pulse optical fiber according to claim 5; it is characterized in that; described gain fibre can be for Yb dosed optical fiber, Er-doped fiber, thulium doped fiber, mix any one in holmium optical fiber, or described gain fibre is that multiple active ions are mixed single mode or low-order mode optical fiber altogether.
7. high-power Q-switched pulse optical fiber according to claim 1, is characterized in that, the low mirror integral setting in described gain flattening filter and broadband.
8. high-power Q-switched pulse optical fiber according to claim 1, is characterized in that, described Q-switching device is acoustooptic Q-switching or electro-optical Q-switch.
9. high-power Q-switched pulse optical fiber according to claim 1, is characterized in that, described fiber amplifier comprises the collimater for the seed pulse laser alignment after amplifying is exported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320621695.6U CN203631970U (en) | 2013-10-09 | 2013-10-09 | High-power Q-switched pulse optical fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320621695.6U CN203631970U (en) | 2013-10-09 | 2013-10-09 | High-power Q-switched pulse optical fiber laser |
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| CN203631970U true CN203631970U (en) | 2014-06-04 |
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| CN201320621695.6U Expired - Lifetime CN203631970U (en) | 2013-10-09 | 2013-10-09 | High-power Q-switched pulse optical fiber laser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953452A (en) * | 2015-06-19 | 2015-09-30 | 深圳联品激光技术有限公司 | Laser resonant cavity and optical fiber laser |
| CN104966982A (en) * | 2015-08-05 | 2015-10-07 | 中国电子科技集团公司第二十六研究所 | Output-isolation-free acoustic-optic Q-switched pulse fiber laser |
| CN106207725A (en) * | 2016-09-26 | 2016-12-07 | 中国工程物理研究院应用电子学研究所 | A kind of 1030nm laser amplifier based on Yb dosed optical fiber |
-
2013
- 2013-10-09 CN CN201320621695.6U patent/CN203631970U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953452A (en) * | 2015-06-19 | 2015-09-30 | 深圳联品激光技术有限公司 | Laser resonant cavity and optical fiber laser |
| CN104966982A (en) * | 2015-08-05 | 2015-10-07 | 中国电子科技集团公司第二十六研究所 | Output-isolation-free acoustic-optic Q-switched pulse fiber laser |
| CN106207725A (en) * | 2016-09-26 | 2016-12-07 | 中国工程物理研究院应用电子学研究所 | A kind of 1030nm laser amplifier based on Yb dosed optical fiber |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 518103, Guangdong, Shenzhen, Baoan District manhole street and a community third industrial zone, Ming Xin Industrial Park, first, third, B Patentee after: MAXPHOTONICS Co.,Ltd. Address before: 518000, Guangdong, Baoan District, Shenzhen manhole, South Ring Road and a community third industrial zone, Ming Xin Industrial Park, first, third, B Patentee before: MAXPHOTONICS Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |
Address after: 518125 Building A2, Building A3, Building 2-3, Building A4, Building A5, Building 6, Building A2, Furong Third Road, Shajing Street, Baoan District, Shenzhen City, Guangdong Province Patentee after: MAXPHOTONICS Co.,Ltd. Address before: 518103 Shajing Street, Baoan District, Shenzhen City, Guangdong Province Patentee before: MAXPHOTONICS Co.,Ltd. |
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| CP02 | Change in the address of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140604 |
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| CX01 | Expiry of patent term |