CN105006733A - High-peak power laser, and protection method and apparatus thereof - Google Patents
High-peak power laser, and protection method and apparatus thereof Download PDFInfo
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- CN105006733A CN105006733A CN201410164173.7A CN201410164173A CN105006733A CN 105006733 A CN105006733 A CN 105006733A CN 201410164173 A CN201410164173 A CN 201410164173A CN 105006733 A CN105006733 A CN 105006733A
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- peak power
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Abstract
The invention relates to the technical field of a laser, and provides a high-peak power laser, and a protection method and apparatus thereof. The protection apparatus comprises a fiber grating, and the fiber grating is used for isolating a Raman spectrum returned from one end of a fiber output head of the high-peak power laser; the fiber grating comprises a fiber portion and a grating portion, the fiber portion is used for manufacturing the grating portion, and the grating portion is used for protecting the light source of the high-peak power laser; and the position of the fiber grating is at the front end, which outputs a transmission fiber, of the applied high-peak power laser. According to the invention, the fiber grating is arranged at the front end, which outputs the transmission fiber, of the high-peak power laser, for isolating the Raman spectrum returned from one end of the fiber output head of the high-peak power laser, so that efficient, safe and stable operation of the high-peak power laser is guaranteed.
Description
[technical field]
The present invention relates to field of laser device technology, particularly relate to a kind of high-peak power laser and guard method thereof and device.
[background technology]
High-peak power laser to be carved and the field such as welding has important, irreplaceable application deeply at laser marking, laser.Usually, laser needs tape splicing to have the fiber output head of isolator just can be applied in industrial processes easily and flexibly.But have higher peak power because high-peak power laser exports pulse, the optical fiber easily and in fiber output head produces serious nonlinear effect, as Raman effect.Laser when laser processing inevitably antireflection part light go back, if when having Raman spectrum to exist in fiber output head, can return to along with output Transmission Fibers, but laser is inner due to price and manufacturing process restriction, general bandwidth is narrower, is only limited to isolation signals wave band, and transparent to Raman spectrum wave band, thus cause laser seed source to damage or damage, reduce the stability of product.
In summary, existing high-peak power laser, existing defects in safety and stability, needs to be improved.Given this, the defect overcoming the prior art existence is the art problem demanding prompt solution.
[summary of the invention]
The technical problem to be solved in the present invention is to provide a kind of guard method and device of high-peak power laser; that can avoid producing in laser application process returns the damage or damage that Raman spectrum causes laser seed source, ensures safety and the stability of high-peak power laser.
The present invention adopts following technical scheme:
A protective device for high-peak power laser, described protective device comprises fiber grating, and described fiber grating is for isolating the Raman spectrum returned from fiber output head one end of high-peak power laser; Wherein,
Described fiber grating comprises fiber section and grating part, and described fiber section is for making described grating part, and described grating part is for the protection of high-peak power laser light source;
When described fiber grating is applied to high-peak power laser, the position of fiber grating is in the front end of the output Transmission Fibers of applied high-peak power laser.
Further, the centre wavelength of described grating part is consistent with the centre wavelength of the high-peak power laser light signal that described protective device is applied.
Further, the live width of described grating part is 0 ~ 50nm.
Further, described fiber section with for the protection of high-peak power laser light source output optical fibre or export Transmission Fibers and match.
Further, the transmitance of described fiber grating is-2 ~ 0DB in the live width of described grating part, and live width is outward-∞ ~-25DB.
Present invention also offers a kind of guard method of high-peak power laser, arrange a fiber grating in the front end of the output Transmission Fibers of described high-peak power laser, described fiber grating is for isolating the Raman spectrum returned from fiber output head one end of high-peak power laser; Wherein,
Described fiber grating comprises fiber section and grating part, and described fiber section is for making described grating part, and described grating part is for the protection of high-peak power laser light source.
Further, the centre wavelength of described grating part is consistent with the centre wavelength of the high-peak power laser light signal that described protective device is applied; Described fiber section with for the protection of high-peak power laser light source output optical fibre or export Transmission Fibers and match.
Further, the live width of described grating part is 0 ~ 50nm.
Further, the transmitance of described fiber grating is-2 ~ 0DB in the live width of described grating part, and live width is outward-∞ ~-25DB.
Present invention also offers a kind of high-peak power laser, be provided with the protective device of high-peak power laser as above in the front end of the output Transmission Fibers of described high-peak power laser.
Compared with prior art, beneficial effect of the present invention is: the present invention arranges a fiber grating by the output Transmission Fibers front end at high-peak power laser, for isolating the Raman spectrum returned from fiber output head one end of high-peak power laser, ensure that effective, the safety of high-peak power laser, stable operation.
[accompanying drawing explanation]
Fig. 1 is the high-peak power optical fiber grating structure schematic diagram of one embodiment of the invention;
Fig. 2 is the structural representation of the high-peak power laser of one embodiment of the invention;
Fig. 3 is the output spectrum figure of the high-peak power laser light source of one embodiment of the invention;
Fig. 4 is the high-peak power laser of one embodiment of the invention when not using fiber grating, the output spectrum figure of fiber output head one end;
Fig. 5 is the desirable transmittance curve figure of spectrum of the high-peak power fiber grating of one embodiment of the invention.
Reference numeral:
High-peak power laser 10, high-peak power laser light source 11, output signal light 12, fiber grating 13, grating part 131, fiber section 132, export Transmission Fibers 14, fiber output head 15, high-peak power laser exports light 16, light source output optical fibre 17, the curve of spectrum 21 of flashlight, the centre wavelength 22 of signal, the centre wavelength 31 of signal, the line of demarcation 32 of signal and Raman spectrum, Raman spectrum part 33, signal spectra part 34, the centre wavelength 51 of grating part, the live width 52 of grating part, the transmittance curve 53 of fiber grating.
[embodiment]
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In addition, if below in described each execution mode of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
Embodiment 1
Figure 1 shows that the protective device of a kind of high-peak power laser that the embodiment of the present invention 1 provides, this protective device is fiber grating 13.Figure 2 shows that the structural representation of the high-peak power laser 10 that the high-peak power fiber grating 13 of the present embodiment is applied, this high-peak power laser 10 comprises high-peak power laser light source 11, exports Transmission Fibers 14 and fiber output head 15, be provided with the fiber grating 13 shown in Fig. 1 in the front end exporting Transmission Fibers 14, it is for isolating the Raman spectrum returned from fiber output head 15 one end of high-peak power laser 10.
Particularly, as depicted in figs. 1 and 2, fiber grating 13 comprises fiber section 132 and grating part 131, and fiber section 132 is for making grating part 131, and grating part 131 is for the protection of high-peak power laser light source 11.The light source output optical fibre 17 of fiber section 132 and high-peak power laser 10 or export Transmission Fibers 14 and match.
Figure 3 shows that the spectrogram of the output signal light 12 of high-peak power laser light source 11 in Fig. 2, wherein, 21 is the curve of spectrum of flashlight, and 22 is the centre wavelength of signal.As can be seen from the curve of spectrum 21 of flashlight, in light signal, there is no Raman signal.
When Figure 4 shows that high-peak power laser 10 does not use fiber grating 13, the high-peak power laser of fiber output head 15 one end exports the spectrogram of light 16, the output Transmission Fibers 14 comprised in signal section and fiber output head 15 acts on the Raman spectrum part 33 produced, and signal spectra part 34.Wherein, 31 is the centre wavelength of signal, and 32 is the line of demarcation of signal and Raman spectrum.
Figure 5 shows that the transmittance curve figure of the fiber grating of the present embodiment, wherein transmittance curve 53 is desirable shape, actually can change accordingly.The live width 52 of grating part 131 is 0 ~ 50nm, the centre wavelength 51 of grating part 131 is consistent with the centre wavelength 22 of high-peak power laser light source 11 signal that this fiber grating 13 is applied, and the transmission transmitance of grating part 131 in its live width 52 is-2 ~ 0DB, transmission transmitance outside live width 52 is-∞ ~-25DB, the signal of high-peak power laser light source 11 can be made so almost nondestructively by fiber grating 13, ensure that the Raman spectrum of high-peak power laser pulse generation is all outside the live width 52 of grating part 131 simultaneously, thus effectively by filtering.
The operation principle of the high-peak power fiber grating 13 of the present embodiment is as follows:
Due to the effect of high-peak power laser 10 internal insulation device, the signal that general high-peak power laser 10 returns to when applying can not damage or damage laser itself, but due to high-peak power signal export in Transmission Fibers 14 transmit time, nonlinear interaction can be there is with output Transmission Fibers 14, thus produce Raman spectrum; But, the isolator of high-peak power laser 10 is due to the restriction of bandwidth and price, general only to the signal generation buffer action returned to, and isolation effect is not had to the Raman spectrum returned to, thus it is inner to cause the Raman spectrum returned to enter high-peak power laser 10, to such an extent as to damage is caused to high-peak power laser 10 or damages.On the one hand in order to make high-peak power laser 10 can export from output Transmission Fibers 14, be applied to laser processing etc. easily and flexibly, high-peak power laser light source 11 inside is back on the other hand in order to avoid exporting the Raman spectrum produced in Transmission Fibers 14, damage is caused to high-peak power laser 10 or damages, the fiber grating 13 identical with the centre wavelength 22 of high-peak power laser light source 11 signal was added before output Transmission Fibers 14, thus ensure that high-peak power laser pulse can enter output Transmission Fibers 14 effectively, the Raman spectrum returned to is returned away simultaneously, ensure that the effective and safe stable operation of high-peak power laser.
The course of work of the present embodiment is illustrated below in conjunction with Fig. 2:
High-peak power laser light source 11 sends output signal light 12, output signal light 12 efficient lossless ground is by fiber grating 13, then import into and export Transmission Fibers 14, output signal light 12, when exporting and transmitting in Transmission Fibers 14, Raman effect occurs can produce Raman spectrum, thus make high-peak power laser export the curve of spectrum of light 16 as shown in Figure 4, comprise signal spectra part 34 and Raman spectrum part 33.High-peak power laser exports light 16 and can produce certain reflection when carrying out the application such as laser processing and enter and export Transmission Fibers 14 and carry out reverse transfer, signal spectra part 34 in the reverberation of reverse transfer can pass through fiber grating 13 completely, finally enter high-peak power laser light source 11 inner, filtered by the isolator of inside, thus avoid this part light cause damage to high-peak power laser light source 11 or damage, Raman spectrum part 33 in the reverberation of reverse transfer is then returned by fiber grating 13, thus it is inner to enter high-peak power laser light source 11, protect high-peak power laser light source 11 not by the impact of Raman spectrum so simply and easily, ensure safety and the stability of high-peak power laser 10.
Use the high-peak power laser of the protective device of the present embodiment can reach following technical standard:
When output Transmission Fibers 14 is 25 μm of silicon optical fibers; by after the protective device of selecting suitable high-peak power laser 10; the output peak power that can obtain high-peak power laser 10 is 1 ~ 100KW, realizes high-peak power laser 10 and carries out laser application with security and stability.
It should be noted that, described fiber grating 13 can arrange 1,2 or multiple, and the centre wavelength of grating and bandwidth can be different, and above-mentioned execution mode all should be included within protection scope of the present invention.
The protective device of the high-peak power laser 10 that the present embodiment provides can be isolated in the Raman spectrum produced in fiber output head 15; avoid Raman spectrum to be back in high-peak power laser 10 cause damage to laser seed or damage; do not affect the transmission of forward signal in high-peak power laser 10 simultaneously, thus ensure the stability of high-peak power laser 10.
Embodiment 2
Present embodiments provide a kind of guard method of high-peak power laser, the method comprises: arrange a fiber grating in the front end of the output Transmission Fibers of high-peak power laser, and this fiber grating is for isolating the Raman spectrum returned from fiber output head one end of high-peak power laser; Wherein, fiber grating comprises fiber section and grating part, and fiber section is for making grating part, and grating part is for the protection of high-peak power laser light source.
In a preferred embodiment, the centre wavelength of grating part is consistent with the centre wavelength of the high-peak power laser light signal that this guard method is applied.The live width of grating part is 0 ~ 50nm.Fiber section with for the protection of high-peak power laser light source output optical fibre or export Transmission Fibers and match.The transmitance of fiber grating is-2 ~ 0DB in the live width of grating part, and live width is outward-∞ ~-25DB.
The operation principle of this method and the course of work can the operation principles of reference example 1, repeat no more herein.
The guard method of the high-peak power laser that the present embodiment provides, effectively and simply can avoid producing in laser application process and return the damage or damage that Raman spectrum causes laser seed, thus ensures the stability of high-peak power laser.
Embodiment 3
Present embodiments provide a kind of high-peak power laser, as shown in Figure 2, this high-peak power laser 10 comprises high-peak power laser light source 11, exports Transmission Fibers 14 and fiber output head 15, be provided with the fiber grating 13 of embodiment 1 in the front end exporting Transmission Fibers 14, it is for isolating the Raman spectrum returned from fiber output head 15 one end of high-peak power laser 10.
Fiber grating 13 is as the protective device of high-peak power laser 10; the Raman spectrum produced in fiber output head 15 can be isolated in; avoid Raman spectrum to be back in high-peak power laser 10 cause damage to laser seed or damage; do not affect the transmission of forward signal in high-peak power laser 10 simultaneously, thus ensure the stability of high-peak power laser 10.
It should be noted that, described fiber grating 13 can arrange 1,2 or multiple, and the centre wavelength of grating and bandwidth can be different, and above-mentioned execution mode all should be included within protection scope of the present invention.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a protective device for high-peak power laser, is characterized in that, described protective device comprises fiber grating, and described fiber grating is for isolating the Raman spectrum returned from fiber output head one end of high-peak power laser; Wherein,
Described fiber grating comprises fiber section and grating part, and described fiber section is for making described grating part, and described grating part is for the protection of high-peak power laser light source;
When described fiber grating is applied to high-peak power laser, the position of fiber grating is in the front end of the output Transmission Fibers of applied high-peak power laser.
2. the protective device of high-peak power laser as claimed in claim 1, it is characterized in that, the centre wavelength of described grating part is consistent with the centre wavelength of the high-peak power laser light signal that described protective device is applied.
3. the protective device of high-peak power laser as claimed in claim 1, it is characterized in that, the live width of described grating part is 0 ~ 50nm.
4. the protective device of high-peak power laser as claimed in claim 1, is characterized in that, described fiber section with for the protection of high-peak power laser light source output optical fibre or export Transmission Fibers and match.
5. the protective device of high-peak power laser as claimed in claim 1, it is characterized in that, the transmitance of described fiber grating is-2 ~ 0DB in the live width of described grating part, and live width is outward-∞ ~-25DB.
6. the guard method of a high-peak power laser, it is characterized in that, arrange a fiber grating in the front end of the output Transmission Fibers of described high-peak power laser, described fiber grating is for isolating the Raman spectrum returned from fiber output head one end of high-peak power laser; Wherein,
Described fiber grating comprises fiber section and grating part, and described fiber section is for making described grating part, and described grating part is for the protection of high-peak power laser light source.
7. the guard method of high-peak power laser as claimed in claim 6, it is characterized in that, the centre wavelength of described grating part is consistent with the centre wavelength of the high-peak power laser light signal that described guard method is applied; Described fiber section with for the protection of high-peak power laser light source output optical fibre or export Transmission Fibers and match.
8. the guard method of high-peak power laser as claimed in claim 6, it is characterized in that, the live width of described grating part is 0 ~ 50nm.
9. the guard method of high-peak power laser as claimed in claim 6, it is characterized in that, the transmitance of described fiber grating is-2 ~ 0DB in the live width of described grating part, and live width is outward-∞ ~-25DB.
10. a high-peak power laser, is characterized in that, is provided with the protective device of the high-peak power laser as described in any one of claim 1-5 in the front end of the output Transmission Fibers of described high-peak power laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410164173.7A CN105006733A (en) | 2014-04-22 | 2014-04-22 | High-peak power laser, and protection method and apparatus thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410164173.7A CN105006733A (en) | 2014-04-22 | 2014-04-22 | High-peak power laser, and protection method and apparatus thereof |
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| CN201410164173.7A Withdrawn CN105006733A (en) | 2014-04-22 | 2014-04-22 | High-peak power laser, and protection method and apparatus thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980494A (en) * | 2019-03-21 | 2019-07-05 | 大族激光科技产业集团股份有限公司 | A kind of monitoring method and fiber laser device of Raman light |
| CN111817119A (en) * | 2020-07-20 | 2020-10-23 | 长沙大科激光科技有限公司 | Fiber laser with anti-fiber core Raman light return function |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010050803A1 (en) * | 2000-06-08 | 2001-12-13 | Choi Bo-Hun | L-band erbium-doped fiber amplifier pumped by 1530 nm-band pump |
| US20050099675A1 (en) * | 2003-11-11 | 2005-05-12 | Lee Han H. | Long-wavelength-band gain-controlled optical amplifier |
| CN102185240A (en) * | 2011-04-07 | 2011-09-14 | 中国科学院半导体研究所 | High-power low-noise single-frequency optical fiber laser |
| CN102449936A (en) * | 2009-05-11 | 2012-05-09 | Ofs菲特尔有限责任公司 | Systems and techniques for suppressing backward lasing in high-power cascaded raman fiber lasers |
| CN103078242A (en) * | 2013-01-28 | 2013-05-01 | 平湖中天合波通信科技有限公司 | High-power laser preventing laser chip from being damaged by backlights |
| CN203800373U (en) * | 2014-04-22 | 2014-08-27 | 深圳激扬光电有限公司 | High-peak power laser and protective device thereof |
-
2014
- 2014-04-22 CN CN201410164173.7A patent/CN105006733A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010050803A1 (en) * | 2000-06-08 | 2001-12-13 | Choi Bo-Hun | L-band erbium-doped fiber amplifier pumped by 1530 nm-band pump |
| US20050099675A1 (en) * | 2003-11-11 | 2005-05-12 | Lee Han H. | Long-wavelength-band gain-controlled optical amplifier |
| CN102449936A (en) * | 2009-05-11 | 2012-05-09 | Ofs菲特尔有限责任公司 | Systems and techniques for suppressing backward lasing in high-power cascaded raman fiber lasers |
| CN102185240A (en) * | 2011-04-07 | 2011-09-14 | 中国科学院半导体研究所 | High-power low-noise single-frequency optical fiber laser |
| CN103078242A (en) * | 2013-01-28 | 2013-05-01 | 平湖中天合波通信科技有限公司 | High-power laser preventing laser chip from being damaged by backlights |
| CN203800373U (en) * | 2014-04-22 | 2014-08-27 | 深圳激扬光电有限公司 | High-peak power laser and protective device thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980494A (en) * | 2019-03-21 | 2019-07-05 | 大族激光科技产业集团股份有限公司 | A kind of monitoring method and fiber laser device of Raman light |
| CN111817119A (en) * | 2020-07-20 | 2020-10-23 | 长沙大科激光科技有限公司 | Fiber laser with anti-fiber core Raman light return function |
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Application publication date: 20151028 |