CN105186272A - Low multi-pulse cluster pulse ultrafast fiber laser based on pulse pumping - Google Patents
Low multi-pulse cluster pulse ultrafast fiber laser based on pulse pumping Download PDFInfo
- Publication number
- CN105186272A CN105186272A CN201510676528.5A CN201510676528A CN105186272A CN 105186272 A CN105186272 A CN 105186272A CN 201510676528 A CN201510676528 A CN 201510676528A CN 105186272 A CN105186272 A CN 105186272A
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- Prior art keywords
- pulse
- fiber
- laser
- ultrafast
- tufted
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094076—Pulsed or modulated pumping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1303—Stabilisation of laser output parameters, e.g. frequency or amplitude by using a passive reference, e.g. absorption cell
Abstract
A low multi-pulse cluster pulse ultrafast fiber laser based on pulse pumping comprises a 976nm semiconductor laser, a pulse signal driver, a fiber wavelength diversion multiplexer, a ytterbium-doped gain fiber, a semiconductor saturable absorption mirror and a fiber bragg grating; the pulse signal driver is connected with the 976nm semiconductor laser; the 976nm semiconductor laser is simultaneously connected with an input end of the fiber wavelength diversion multiplexer; an output end of the fiber wavelength diversion multiplexer is connected with one end of the ytterbium-doped gain fiber; the other end of the ytterbium-doped gain fiber is connected with the semiconductor saturable absorption mirror having a tail fiber; the fiber bragg grating is welded with a signal end of the fiber wavelength diversion multiplexer; a transmission end of the fiber bragg grating serves as the output end of the laser. The low multi-pulse cluster pulse ultrafast fiber laser based on pulse pumping is simple in structure, compact in size, so the laser is stable; the semiconductor saturable absorption mirror serves as a mode locking device, so the fiber laser is high in stability, and easy in self-starting.
Description
Technical field
The invention belongs to optical fiber and laser technology field, particularly relate to a kind of ultrafast fiber laser of low repetition tufted pulse based on pulse pump formula.
Technical background
There is due to fiber laser the advantages such as transformation efficiency is high, good beam quality, therefore be used widely in communication, medical treatment, machining etc. in recent years, especially the ultrafast laser of high-peak power, high pulse energy, and the method obtaining this ultrafast laser is exactly carry out amplification process to the ultrafast seed source of low repetition.
Usually, adjust the fiber laser of Q can produce the light pulse of relatively low repetition, be about 1kHz-200kHz, but its shortcoming is pulse duration reaches few tens of nano-seconds, usual ultrashort pulse (pulse duration is less than 100ps) has shorter pulse duration, in rapidoprint, thermal region is relatively less, and crudy is better.Although passive mode-locking fiber laser can produce ultrashort pulse, width is psec or femtosecond magnitude, their repetition but up to tens of megahertz, even hundred hertz.If carry out amplification process to this laser, because repetition rate is too high, therefore single pulse energy is difficult to reach very high numerical value.If so expect high single pulse energy, need to carry out down conversion process to seed light, and Yet-have lacks such device at present.
Summary of the invention
In order to solve the problem, the object of the present invention is to provide a kind of ultrafast fiber laser of low repetition tufted pulse based on pulse pump formula of simple and compact for structure, stable performance.
In order to achieve the above object, the ultrafast fiber laser of low repetition tufted pulse based on pulse pump formula provided by the invention comprises 976nm semiconductor laser, pulse signal driver, optical fibre wavelength division multiplexer, mixes ytterbium gain fibre, semiconductor saturable absorbing mirror and Fiber Bragg Grating FBG; Wherein pulse signal driver is connected with 976nm semiconductor laser, and 976nm semiconductor laser is connected with the input of optical fibre wavelength division multiplexer simultaneously; The output of optical fibre wavelength division multiplexer is connected with the one end of mixing ytterbium gain fibre, the other end mixing ytterbium gain fibre is connected on the semiconductor saturable absorbing mirror with tail optical fiber, the signal end of Fiber Bragg Grating FBG 6 and optical fibre wavelength division multiplexer welds together, and the transmission end of Fiber Bragg Grating FBG is as the output of this laser.
The described ultrafast fiber laser of low repetition tufted pulse based on pulse pump formula also comprises a carbon nano-tube film be arranged on before output, to go the unstable pulse before filtering locked mode, is more conducive to the regularity of pulse train.
The output of this described laser is connected with the optical fiber at 8 ° of angles of cutting sth. askew, for increasing the stability of system.
The advantage of the ultrafast fiber laser of low repetition tufted pulse based on pulse pump formula provided by the invention is that structure is simple, compact dimensions, is therefore conducive to the stability of laser.In addition, adopt semiconductor saturable absorbing mirror as mode-locking device, there is the advantages such as stability is high, easy self-starting.
Accompanying drawing explanation
Fig. 1 is the ultrafast optical fiber laser structure schematic diagram of low repetition tufted pulse based on pulse pump formula provided by the invention.
Fig. 2 is tufted pulse train schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the ultrafast fiber laser of low repetition tufted pulse based on pulse pump formula provided by the invention is described in detail.
As shown in Figure 1, the ultrafast fiber laser of low repetition tufted pulse based on pulse pump formula provided by the invention comprise 976nm semiconductor laser 1, pulse signal driver 2, optical fibre wavelength division multiplexer 3, mix ytterbium gain fibre 4, semiconductor saturable absorbing mirror (SESAM) 5 and Fiber Bragg Grating FBG 6; Wherein pulse signal driver 2 is connected with 976nm semiconductor laser 1, and 976nm semiconductor laser 1 is connected with the input of optical fibre wavelength division multiplexer 3 simultaneously; The output of optical fibre wavelength division multiplexer 3 is connected with the one end of mixing ytterbium gain fibre 4, the other end mixing ytterbium gain fibre 4 is connected on the semiconductor saturable absorbing mirror 5 with tail optical fiber, the signal end of Fiber Bragg Grating FBG 6 and optical fibre wavelength division multiplexer 3 welds together, and the transmission end of Fiber Bragg Grating FBG 6 is as the output of this laser.
The described ultrafast fiber laser of low repetition tufted pulse based on pulse pump formula also comprises a carbon nano-tube film 7 be arranged on before output, to go the unstable pulse before filtering locked mode, is more conducive to the regularity of pulse train.
The output of this described laser is connected with the optical fiber 8 at 8 ° of angles of cutting sth. askew, for increasing the stability of system.
Now the ultrafast fiber laser operation principle of low repetition tufted pulse based on pulse pump formula provided by the invention is described below: the 976nm semiconductor laser 1 as pumping source is powered by pulse signal driver 2, produce the low repetition tufted pulse laser in cycle thus, the repetition rate of tufted pulse is consistent with the repetition rate of pulse drive signal, can control at 100Hz-10kHz, laser pulse repetition frequency is 20MHz, so, the repetition rate of the inner individual pulse of tufted pulse is 20MHz, and the width of each pulse is less than 5ps, then by optical fibre wavelength division multiplexer 3 above-mentioned low repetition tufted pulse laser is coupled into and mixes in ytterbium gain fibre 4.The Fiber Bragg Grating FBG 6 of low reflection and semiconductor saturable absorbing mirror 5 constitute the linear resonant cavity of this laser, Fiber Bragg Grating FBG 6 pairs of tufted pulse lasers have high-transmission rate, the laser of 1064nm wave band is had to the reflectivity of 20%, be so more conducive to solving the too high and pulse fragmentation problem that causes of chamber internal cause power.Transmission end finally by carbon nano-tube film 7 and Fiber Bragg Grating FBG 6 exports the ultrafast laser bundle of low repetition.Tufted pulse train as shown in Figure 2.
Claims (3)
1. based on the ultrafast fiber laser of low repetition tufted pulse of pulse pump formula, it is characterized in that: it comprises 976nm semiconductor laser (1), pulse signal driver (2), optical fibre wavelength division multiplexer (3), mixes ytterbium gain fibre (4), semiconductor saturable absorbing mirror (5) and Fiber Bragg Grating FBG (6); Wherein pulse signal driver (2) is connected with 976nm semiconductor laser (1), and 976nm semiconductor laser (1) is connected with the input of optical fibre wavelength division multiplexer (3) simultaneously; The output of optical fibre wavelength division multiplexer (3) is connected with the one end of mixing ytterbium gain fibre (4), the other end mixing ytterbium gain fibre (4) is connected on the semiconductor saturable absorbing mirror (5) with tail optical fiber, the signal end of Fiber Bragg Grating FBG (6) and optical fibre wavelength division multiplexer (3) welds together, and the transmission end of Fiber Bragg Grating FBG (6) is as the output of this laser.
2. the ultrafast fiber laser of low repetition tufted pulse based on pulse pump formula according to claim 1, it is characterized in that: the described ultrafast fiber laser of low repetition tufted pulse based on pulse pump formula also comprises a carbon nano-tube film (7) be arranged on before output, to go the unstable pulse before filtering locked mode, be more conducive to the regularity of pulse train.
3. the ultrafast fiber laser of low repetition tufted pulse based on pulse pump formula according to claim 1, it is characterized in that: the output of this described laser is connected with the optical fiber (8) at 8 ° of angles of cutting sth. askew, for increasing the stability of system.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510676528.5A CN105186272A (en) | 2015-10-19 | 2015-10-19 | Low multi-pulse cluster pulse ultrafast fiber laser based on pulse pumping |
| CN201610011803.6A CN105428981A (en) | 2015-10-19 | 2016-01-05 | Pulse pumping based low-repetition-frequency cluster-like pulse ultrafast fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510676528.5A CN105186272A (en) | 2015-10-19 | 2015-10-19 | Low multi-pulse cluster pulse ultrafast fiber laser based on pulse pumping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105186272A true CN105186272A (en) | 2015-12-23 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510676528.5A Pending CN105186272A (en) | 2015-10-19 | 2015-10-19 | Low multi-pulse cluster pulse ultrafast fiber laser based on pulse pumping |
| CN201610011803.6A Pending CN105428981A (en) | 2015-10-19 | 2016-01-05 | Pulse pumping based low-repetition-frequency cluster-like pulse ultrafast fiber laser |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610011803.6A Pending CN105428981A (en) | 2015-10-19 | 2016-01-05 | Pulse pumping based low-repetition-frequency cluster-like pulse ultrafast fiber laser |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114389132A (en) * | 2022-01-14 | 2022-04-22 | 中国人民解放军国防科技大学 | Fiber pulse laser oscillator and oscillation starting method |
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2015
- 2015-10-19 CN CN201510676528.5A patent/CN105186272A/en active Pending
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2016
- 2016-01-05 CN CN201610011803.6A patent/CN105428981A/en active Pending
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| CN105428981A (en) | 2016-03-23 |
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Application publication date: 20151223 |