CN106451068A - Stable seed source used for high-power MOPA pulse laser - Google Patents
Stable seed source used for high-power MOPA pulse laser Download PDFInfo
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- CN106451068A CN106451068A CN201510472668.0A CN201510472668A CN106451068A CN 106451068 A CN106451068 A CN 106451068A CN 201510472668 A CN201510472668 A CN 201510472668A CN 106451068 A CN106451068 A CN 106451068A
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Abstract
The invention relates to the technical field of fiber gratings and fiber lasers, and particularly discloses a stable seed source used for a high-power master oscillator power-amplifier (MOPA) pulse laser. The stable seed source comprises an F-P semiconductor laser, the fiber gratings, optical fibers used for manufacturing the fiber gratings and a depolarizer, wherein the F-P semiconductor laser, the fiber gratings, the optical fibers and the depolarizer are successively arranged along the light transmission direction. The stable seed source is a signal light source which is simple in structure, stable in central wavelength, stable in peak wavelength, stable in linewidth, low in cost and great in performance and can act as the fiber laser through amplification, then the optical fibers are connected with the simple and cheap depolarizer, and the laser polarization obtained through the depolarizer is greater than or equal to 10DB so that the light is close to non-polarized light, the light is amplified and passes through a vibrating mirror and then laser processing is performed and thus the fine processing precision can be achieved.
Description
Technical field
The present invention relates to fiber grating and optical fiber laser art field, it is used for particularly to one kind
The stable seed source of high power MOPA pulse laser.
Background technology
Research with laser instrument deepens continuously, high power, high-peak power, high single pulse energy,
The Ultra-short Fiber Laser of high light beam quality extensively has tempting in fields such as micromachined, marks
Application prospect, become one of study hotspot of current people.The single tune Q of tradition or mode locking pulse
The single pulse energy of optical fiber laser is often limited, limits its application.
Master oscillation power amplification (Master Oscillator Power-Amplifier, MOPA) technology can be entered
One step improves pulse energy, the high energy pulse laser that this structure obtains in a fiber and seed signal light
The laser spectrum wavelength in source, pulse recurrence frequency etc. are identical, and the switch of time domain impulse and width also several
Holding is identical with flashlight.Thus using MOPA technology be one kind realize high average output power,
The ideal chose of the optical fiber laser of high single pulse energy, high-peak power and high light beam quality.
Seed as MOPA pulse optical fiber can be Q-switch laser source or directly modulation is partly led
Body laser.Directly modulated laser can realize within the specific limits Pulse of Arbitrary width and
The output of the waveform of frequency, may finally realize height after this signal output averagely defeated after multistage amplification
Go out power.However, for realizing the system of stable MOPA it is desirable to the signal of signal source takes into account low one-tenth
This, the centre wavelength of stable live width and stable below 10dB spectral bandwidth or peak wavelength, non-partially
Shake light, thus reducing the nonlinear effect that signal produces when exaggerated (as stimulated Raman scattering
(Stimulated Raman Scattering, SRS), stimulated Brillouin scattering (Stimulated Brillouin
Scattering, SBS), Self-phase modulation (Self Phase Modulation, SPM) and in transmitting procedure
In higher order nonlinear effect etc.) damage that laser instrument is caused is it is ensured that MOPA pulse fiber
The stability of laser instrument.
The spectrum of laser of tail optical fiber output of existing F-P semiconductor laser and live width are wider, do not allow
Easy to control.Simultaneously because the difference of the temperature of environment residing for semiconductor laser and control electric current
Not equal, lead to the centre wavelength of below 10dB spectral bandwidth of laser or peak wavelength to drift about,
Have a strong impact on the stability of the high-capacity optical fiber laser after amplification.
As shown in figure 4, the pulse producing for common F-P semiconductor laser after amplifying due to
Non-linear phenomena leads to it to produce spike, and the peak power of this spike producing suddenly is at least normal
3 times of the peak power of pulse amplified, the corresponding device within the badly damaged laser instrument of meeting.Simultaneously
Directly the light from the output of F-P semiconductor laser is polarized light, and laser after amplifying for the polarized light
Device is used for the galvanometer applied when laser machining, and galvanometer is very sensitive to polarized light, leads to Laser Processing not
Uniformly the problems such as, have a strong impact on machining accuracy.
Content of the invention
It is contemplated that overcoming the defect of prior art, it is that MOPA high power pulse optical fiber laser carries
For a kind of centre wavelength of below 10dB spectral bandwidth or peak wavelength stable, live width is stable, inexpensive,
The easily good signal optical source of the non-polarized light of realization >=10dB, performance.
For achieving the above object, the present invention employs the following technical solutions：
The present invention provides a kind of stable seed source for high power MOPA pulse laser, including edge
F-P semiconductor laser that optical transmission direction is sequentially arranged, fiber grating, it is used for making fiber grating
Optical fiber, Depolarizer.
In some embodiments, the signal pulse duration range of described F-P semiconductor laser is 0.2ns～800ns,
Centre wavelength or peak wavelength are 1000nm～1100nm, and live width is 0.002nm～20nm.
In some embodiments, the centre wavelength of described fiber grating is 1000nm～1100nm, and live width is
0.1nm～15nm, reflectance is 0.5%～20%.
In some embodiments, the described optical fiber for making fiber grating is polarization maintaining optical fibre.
In some embodiments, described F-P semiconductor laser is connected with fiber grating.There are two kinds of realities
Existing mode：
1. the tail optical fiber of F-P semiconductor laser described in is polarization maintaining optical fibre, is connected with fiber grating.
2. the tail optical fiber of F-P semiconductor laser described in is the polarization maintaining optical fibre having carried grating, and is carried
The position of grating and specification meet this patent and require.
In some embodiments, the fiber lengths between described F-P semiconductor laser and fiber grating are
0.005m～5m.
The stable seed source of the present invention, including the F-P semiconductor laser being sequentially arranged along optical transmission direction
Device, fiber grating, optical fiber, Depolarizer for making fiber grating, its advantage is：
After adding this fiber grating：
1. fiber grating can reflect a part of flashlight to F-P semiconductor laser, is protected by feedback regulation
Card semiconductor laser exports the centre wavelength of below 10dB or peak wavelength is stablized in fiber grating
Live width in the range of.
2. effect further includes, fiber grating live width is 0.1nm～15nm, and laser linewidth is controlled
0.1nm～15nm, shortens the signal that live width is more than 15nm.
3. effect further includes, by the feedback regulation of fiber grating, can avoid making F-P quasiconductor swash
Light device is operated in less or single longitudinal mode situation, and the non-linear phenomena after suppression is amplified effectively produces, such as
(as stimulated Raman scattering (Stimulated Raman Scattering, SRS), stimulated Brillouin scattering
(Stimulated Brillouin Scattering, SBS), Self-phase modulation (Self Phase Modulation,
SPM higher order nonlinear effect) and in transmitting procedure etc.).
In a preferred approach, effect further includes, F-P semiconductor laser away from fiber grating away from
It is 0.005m-5m so that can obtain for the pulse in the range of 0.2ns-800ns in pulse duration range from 3
To control.
In priority scheme, effect further includes, due to the signal of F-P semiconductor laser output
For complete polarized light, we used polarization maintaining optical fibre and be used for making fiber grating it is ensured that moving back in entrance
Optical signal before polariser is to protect the number of believing one side only completely, decreases the loss of system, Simultaneous Stabilization spectrum
Centre wavelength and bandwidth, so we can be simple, inexpensive using structure after polarization maintaining optical fibre
Depolarizer (as optical fiber Depolarizer etc.) can be obtained by the degree of polarization >=10dB of signal, close
Non-polarized light, is laser machined after amplifying after galvanometer, reaches the machining accuracy of fineness,
Also allow for producing in batches simultaneously.
For synthesis, a kind of structure of seed source of the present invention is simple, in below 10dB spectral bandwidth
Cardiac wave length or peak wavelength are stable, live width is stable, the non-polarized light of inexpensive, easy realization >=10dB
Signal source.
Brief description
Fig. 1 is a kind of the whole of stable seed source for high power MOPA pulse laser of the present invention
Body structural representation.
Fig. 2 is traditional panda type polarization-preserving fiber structural representation that the present invention uses.
Fig. 3 is the spectrogram of F-P semiconductor laser radiation flashlight 4 in one embodiment of the invention
Spectrogram with stabilization signal 5 after fiber grating.
Fig. 4 be the pulse producing for common F-P semiconductor laser after amplifying due to non-linear
Phenomenon leads to it to produce spike figure.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with accompanying drawing
And specific embodiment, the present invention will be described in further detail.It should be appreciated that it is described herein
Specific embodiment is only in order to explain the present invention, and is not construed as limiting the invention.
The present invention provides a kind of stable seed source for high power MOPA pulse laser, including edge
F-P semiconductor laser that optical transmission direction is sequentially arranged, fiber grating, it is used for making fiber grating
Optical fiber, Depolarizer.
As shown in figure 1, a kind of stable kind for high power MOPA pulse laser for the present invention
The overall structure diagram of component.This stable seed source includes a F-P semiconductor laser 1, optical fiber light
Grid 2, optical fiber 6, Depolarizer 7 for making fiber grating, above-mentioned part is along optic path direction
It is sequentially arranged.
Preferably, the optical fiber for making fiber grating is polarization maintaining optical fibre.As shown in Fig. 2 being this
The structural representation of bright polarization maintaining optical fibre.This polarization maintaining optical fibre is traditional panda type polarization-preserving fiber structure chart, its
In 21 be two stress rods units, 22 be fibre core, 23 be optical fiber covering.Stress rods unit 21 exists
Introduce birefringence in polarization maintaining optical fibre fibre core 22, keep the polarization characteristic of F-P semiconductor laser transmission.
F-P semiconductor laser 1 is single transverse mode FP die cavity semiconductor laser, as shown in Figure 14
For its transmission signal light.Curve 4 is 25Khz for transmission signal light 4 in waveform as shown in Figure 3, arteries and veins
Spectrogram during a width of 200ns：Centre wavelength in 3dB spectral bandwidth or peak wavelength are about 1060nm,
Live width is about 1.22nm.
Wavelength and live width for avoiding F-P semiconductor laser is easily subject to the difference of temperature and control electric current
Deng impact, thus leading to the unstable of high-capacity optical fiber laser, in F-P semiconductor laser 1
Middle incoming fiber optic grating 2.As shown in Figure 15 is the flashlight after fiber grating.Fiber grating 2
Centre wavelength be 1000nm～1100nm, reflectance is about 0.5%～20%, and live width is
0.1nm～15nm.Combined with F-P semiconductor laser 1 by the reflection of fiber grating 2 it is ensured that
Stablized by the centre wavelength or peak wavelength of below the 10dB spectral bandwidth of fiber grating flashlight 5
The live width scope of the fiber grating required by this patent.Curve 5 is flashlight 5 in ripple as shown in Figure 3
Shape is 25Khz, and pulsewidth is spectrogram during 200ns：As the centre wavelength in 3dB spectral bandwidth or peak
Value wavelength is 1061.1nm, and live width is 1.16nm.
The signal that live width is more than 15nm can on the one hand be shortened simultaneously, on the other hand can avoid making F-P
Semiconductor laser is operated in less or single longitudinal mode situation, and the non-linear phenomena after suppression is amplified effectively is produced
Raw, such as stimulated Raman scattering (Stimulated Raman Scattering, SRS), stimulated Brillouin scattering
(Stimulated Brillouin Scattering, SBS), Self-phase modulation (Self Phase Modulation,
SPM higher order nonlinear effect) and in transmitting procedure etc..
The pulse duration range of MOPA high power nanosecond laser is 0.2ns～800ns, for making in pulse duration range
Interior signal can be worked by fiber grating, reflect back pulse light 5 can in time itself
Adjust, such as Fig. 1 embodiment of the present invention F-P semiconductor laser 1 is connected with fiber grating 2, and
The distance (length of optical fiber) 3 away from fiber grating 2 for the F-P semiconductor laser 1 is 0.005m-5m,
So that control can be accessed in pulse duration range for the pulse in the range of 0.2ns～800ns.
Because the galvanometer required for mark is typically more sensitive to polarizing, also easily cause some non-linear simultaneously
The generation of effect, in order to realize the uniform of mark, needing the Design of Signal do not amplified is non-polarized light.
If Fig. 1 is to make F-P semiconductor laser 1 obtain non-polarized light, after polarization maintaining optical fibre 6, it is connected to structure
Simply, the Depolarizer 7 (as optical fiber Depolarizer etc.) of low cost, after Depolarizer 7
Laser signal 8 degree of polarization arriving is >=10DB, close to non-polarized light, after amplifying after galvanometer
Laser machined, will not occur, due to polarizing the unstable situation leading to poor processing effect, to obtain very
Uniform treatment effect, reaches the machining accuracy of fineness.
The stable seed source of the present invention is a kind of centre wavelength of below 10dB spectral bandwidth or peak value ripple
The signal that length is stable, live width is stable, inexpensive, the non-polarized light of easy realization >=10dB, performance are good
Light source, and avoid non-linear phenomena to produce after amplifying, its high power MOPA after amplifying
Laser instrument is eventually applied to the fields such as mark, reaches the machining accuracy of fineness.
The specific embodiment of present invention described above, does not constitute limiting the scope of the present invention.
The done various other corresponding change of any technology according to the present invention design and deformation, all should wrap
Containing within the scope of the invention as claimed.
Claims (6)
1. a kind of stable seed source for high power MOPA pulse laser is it is characterised in that wrap
Include the F-P semiconductor laser being sequentially arranged along optical transmission direction, fiber grating, be used for making optical fiber
The optical fiber of grating, Depolarizer.
2. it is used for the stable seed source of high power MOPA pulse laser as claimed in claim 1,
It is characterized in that, the described optical fiber for making fiber grating is polarization maintaining optical fibre.
3. it is used for the stable seed source of high power MOPA pulse laser as claimed in claim 1,
It is characterized in that, the signal pulse duration range of described F-P semiconductor laser is 0.2ns～800ns, center
Wavelength or peak wavelength are 1000nm～1100nm, and live width is 0.002nm～20nm.
4. it is used for the stable seed source of high power MOPA pulse laser as claimed in claim 3,
It is characterized in that, the centre wavelength of described fiber grating is 1000nm～1100nm, and live width is
0.1nm～15nm, reflectance is 0.5%～20%.
5. it is used for the stable seed source of high power MOPA pulse laser as claimed in claim 1,
It is characterized in that, the tail optical fiber of described F-P semiconductor laser is connected with fiber grating.
6. it is used for the stable seed source of high power MOPA pulse laser as claimed in claim 5,
It is characterized in that, the fiber lengths between described F-P semiconductor laser and fiber grating are 0.005m
～5m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510472668.0A CN106451068A (en) | 2015-08-04 | 2015-08-04 | Stable seed source used for high-power MOPA pulse laser |
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| CN201510472668.0A CN106451068A (en) | 2015-08-04 | 2015-08-04 | Stable seed source used for high-power MOPA pulse laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110405349A (en) * | 2018-04-28 | 2019-11-05 | 福州高意光学有限公司 | A kind of polarization maintaining optical fibre marker method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244355A (en) * | 2011-06-13 | 2011-11-16 | 武汉安扬激光技术有限责任公司 | Pulse-width-tunable gain-switch type picosecond pulse seed source |
| CN102545012A (en) * | 2012-02-24 | 2012-07-04 | 中国科学院上海光学精密机械研究所 | 1,053 nanometer femtosecond pulse generation device with stable carrier envelope phase |
| CN103245369A (en) * | 2013-03-22 | 2013-08-14 | 黎敏 | Novel fiber bragg grating demodulation method and system thereof based on multi-longitudinal mode F-P laser device |
| CN203826765U (en) * | 2014-04-23 | 2014-09-10 | 上海朗研光电科技有限公司 | All-fiber cascade laser amplification device having automatic polarization stabilization control function |
| CN104752946A (en) * | 2014-08-25 | 2015-07-01 | 深圳市创鑫激光股份有限公司 | Pulse width adjusting fiber laser based on broadband seed resource |
-
2015
- 2015-08-04 CN CN201510472668.0A patent/CN106451068A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244355A (en) * | 2011-06-13 | 2011-11-16 | 武汉安扬激光技术有限责任公司 | Pulse-width-tunable gain-switch type picosecond pulse seed source |
| CN102545012A (en) * | 2012-02-24 | 2012-07-04 | 中国科学院上海光学精密机械研究所 | 1,053 nanometer femtosecond pulse generation device with stable carrier envelope phase |
| CN103245369A (en) * | 2013-03-22 | 2013-08-14 | 黎敏 | Novel fiber bragg grating demodulation method and system thereof based on multi-longitudinal mode F-P laser device |
| CN203826765U (en) * | 2014-04-23 | 2014-09-10 | 上海朗研光电科技有限公司 | All-fiber cascade laser amplification device having automatic polarization stabilization control function |
| CN104752946A (en) * | 2014-08-25 | 2015-07-01 | 深圳市创鑫激光股份有限公司 | Pulse width adjusting fiber laser based on broadband seed resource |
Non-Patent Citations (1)
| Title |
|---|
| 汪园香等: "基于MOPA 结构的高功率线偏振脉冲 Yb 光纤激光器", 《红外与激光工程》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110405349A (en) * | 2018-04-28 | 2019-11-05 | 福州高意光学有限公司 | A kind of polarization maintaining optical fibre marker method |
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