CN109412009A - The all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling - Google Patents
The all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling Download PDFInfo
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- CN109412009A CN109412009A CN201811336173.5A CN201811336173A CN109412009A CN 109412009 A CN109412009 A CN 109412009A CN 201811336173 A CN201811336173 A CN 201811336173A CN 109412009 A CN109412009 A CN 109412009A
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1106—Mode locking
- H01S3/1112—Passive mode locking
- H01S3/1115—Passive mode locking using intracavity saturable absorbers
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Abstract
The invention discloses a kind of all-fiber Q-switch and mode-locking pulse lasers of dual resonant cavity coupling, including pump arrangement, laser resonator, gain fibre and laser output device, the laser has linear cavity or ring cavity structure, to export pulse laser, wherein, pump arrangement includes pumping source, optical-fiber bundling device and wavelength division multiplexer；Laser resonator includes the first reflection-type optical fiber Bragg grating, the second reflection-type optical fiber Bragg grating, semiconductor saturable absorbing mirror, third reflection-type optical fiber Bragg grating, total reflective mirror；Gain fibre includes the first gain fibre and the second gain fibre；Laser output device includes optoisolator, circulator and fiber optic splitter.The present invention is all optical fibre structure, and design is simple, compact-sized, can effectively improve the delivery efficiency and its stability of laser, the exportable Q-switch and mode-locking pulse with high single pulse energy and narrow pulse width.
Description
Technical field
The invention belongs to laser technology, optical fiber optics and non-linear optical field technical fields, in particular to a kind of double humorous
The all-fiber Q-switch and mode-locking pulse laser that the chamber that shakes couples.
Background technique
Optical fiber laser because its with small in size, light-weight, high conversion efficiency, it is compact-sized, low in cost, be easy to scattered
Heat, the advantages that output beam quality is good, easy to maintain become one of the research hotspot of laser field in recent years, and very much
Field is widely used, such as laser processing, laser medicine, optic communication, defense military and scientific research field.
Currently, in optical fiber laser, there are two types of the modes of realizing pulse: one is adjusting Q, and be divided into actively Q-switched and by
Dynamic to adjust Q, the pulse width obtained in the way of adjusting Q is usually μ s~ns magnitude；Another kind is mode locking, be divided into active mode locking and
Passive mode-locking, the pulse width realized is generally in ps~fs magnitude.Both modes are respectively intended to realize high single pulse energy
Amount and narrow pulse width, both modes are combined, and are exactly Q-switch and mode-locking technology, and Q-switch and mode-locking specifically refers to adjusting Q packet
The periodic modulation of mode locking pulse amplitude is realized under network.It can be met simultaneously using the technology to high single pulse energy and narrow
The demand of pulse width, therefore Q-switch and mode-locking pulse optical fiber has in fields such as laser processing, ultrafast biology, optic communications
There is critically important researching value.
Summary of the invention
Complicated for light path system existing in the prior art, loss is big, at high cost, environment resistant interference performance is poor, simultaneously
Technical problems, the present invention such as Q-switched laser pulsewidth is not narrow enough, mode-locked laser single pulse energy is not high enough provide a kind of double resonance
The all-fiber Q-switch and mode-locking pulse laser of chamber coupling realizes passive adjust using rare earth doped optical fibre as saturable absorber
Q, while passive mode-locking is realized using reflective saturable absorber, and pumping input unit is placed in outside chamber, it is intracavitary to be not necessarily to
Additional modulation device greatly reduces the loss of resonant cavity, realizes the laser system of high integration, high efficiency, high stability
System.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling, including pump arrangement, laser resonator,
Gain fibre and laser output device, the laser has linear cavity or ring cavity structure, to export pulse laser, wherein
The pump arrangement includes pumping source, optical-fiber bundling device and wavelength division multiplexer；The laser resonator
It is inhaled including the first reflection-type optical fiber Bragg grating, the second reflection-type optical fiber Bragg grating, semiconductor saturable
Receive mirror, third reflection-type optical fiber Bragg grating, total reflective mirror；
The gain fibre includes the first gain fibre and the second gain fibre；
The laser output device includes optoisolator, circulator and fiber optic splitter；
When using linear cavity configuration, the first reflection-type optical fiber Bragg grating and second reflection-type optical fiber Prague
Optical grating constitution interior resonance chamber, the intracavitary interior resonance includes the first gain fibre；Semiconductor saturable absorbing mirror and third reflect
Type fiber bragg grating constitutes exterior resonant cavity, includes the second gain fibre in the exterior resonant cavity, and interior resonance chamber also wraps
It is contained among exterior resonant cavity；
Wherein, the pumping input terminal of the pumping source and optical-fiber bundling device connects, the signal input of the optical-fiber bundling device
End is connected with optoisolator, and the common end of the optical-fiber bundling device and one end of third reflection-type optical fiber Bragg grating connect
It connects, the other end of the third reflection-type optical fiber Bragg grating is sequentially connected the second gain fibre and the first reflection-type optical fiber cloth
Glug grating, the other end of the first reflection-type optical fiber Bragg grating successively with the first gain fibre, the second reflection type optical
One end of fine Bragg grating connects, the other end of the second reflection-type optical fiber Bragg grating directly with semiconductor saturable
Absorbing mirror contact；
When using ring cavity structure, the first reflection-type optical fiber Bragg grating and second reflection-type optical fiber Prague
Optical grating constitution resonance inner cavity, the resonance inner cavity include the first gain fibre；Second gain fibre, circulator and semiconductor
Saturable absorbing mirror constitutes the resonant external cavity of ring structure, and resonance inner cavity is included among resonant external cavity；
Wherein, the pumping input terminal of the pumping source connection wavelength division multiplexer, the signal input part of the wavelength division multiplexer
One end of the first reflection-type optical fiber Bragg grating is connected, the other end of the first reflection-type optical fiber Bragg grating successively connects
Connect the first gain fibre, the second reflection-type optical fiber Bragg grating, the second reflection-type optical fiber Bragg grating and optical fiber point
Wherein one end of beam device output end is connected, and the common end of the wavelength division multiplexer is sequentially connected the second gain fibre, circulator,
Wherein one end of the circulator is directly contacted with semiconductor saturable absorbing mirror；
When using linear cavity configuration or ring cavity structure, the pumping source generates pump light, passes through optical-fiber bundling device
Or wavelength division multiplexer is coupled into exterior resonant cavity, in the collective effect of second gain fibre and semiconductor saturable absorbing mirror
Under, generate Mode-locked laser；Then the Mode-locked laser that the exterior resonant cavity generates enters in interior resonance chamber, described the
Under the saturable absorption effect of one gain fibre, adjusting Q pulse laser is generated, the pulse laser that the interior resonance chamber generates can pass through
Exterior resonant cavity after obtaining amplification, realizes that the laser of narrow pulse width and high single pulse energy exports eventually by output device.
As preferential, the pumping source be semiconductor laser, gas laser, solid state laser, optical fiber laser or
One of which in Ramar laser, the central wavelength range for exporting pump light is 700nm≤λ≤2000nm.
Preferably, the optical-fiber bundling device is changed to wavelength division multiplexer in the linear cavity configuration；Second reflection
Type fiber bragg grating and third reflection-type optical fiber Bragg grating are changed to total reflective mirror；The first reflection-type optical fiber Bradley
Lattice grating, the second reflection-type optical fiber Bragg grating, third reflection-type optical fiber Bragg grating reflectivity be R, wherein 0 < R
< 1；The first reflection-type optical fiber Bragg grating and the second reflection-type optical fiber Bragg grating use Same Wavelength parameter, instead
It is identical or different to penetrate rate；The wave-length coverage of the semiconductor saturable absorbing mirror covers third reflection-type optical fiber Bragg grating
Wavelength, reflectivity is identical or different.
Preferably, the wavelength division multiplexer is changed to optical-fiber bundling device in the ring cavity structure.
Preferably, the optoisolator is placed between circulator and fiber optic splitter in the ring cavity structure, and
And the splitting ratio of the fiber optic splitter is between 0 to 1.
Preferably, first gain fibre and the second gain fibre are the optical fiber or photonic crystal of rare earth doped element
Optical fiber, wherein the rare earth element adulterated is one or more of ytterbium, erbium, holmium, thulium, samarium, bismuth.
Preferably, the optical-fiber bundling device be (2+1) × 1 optical-fiber bundling device or (6+1) × 1 optical-fiber bundling device,
It is the one of which in polarization beam combiner or unpolarized bundling device.
Preferably, semiconductor saturable absorbing mirror is changed to graphene, graphene oxide, carbon nanotube or topology insulation
One of body.
Preferably, the pump mode is the single-ended pumping of fibre core, fibre core both-end pumping, the single-ended pumping of covering or covering
One of which in both-end pumping.
The all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling of the invention, has the advantages that
1. the present invention uses gain fibre and reflective saturable absorber, in combination with splitter with dual resonance cavity structure, and it is intracavitary
Both without pumping input unit, without additional modulation element, all optical fibre structure.
2. the present invention uses two kinds of saturable absorbers, the output for adjusting Q and mode-locked laser pulse can be realized simultaneously, it can be with
Meet the needs of to high single pulse energy and narrow pulse width simultaneously, expands broader practice prospect.
3. present invention design is simple, compact-sized, small in size, strong by environmental disturbances ability, may be implemented high light beam quality,
High stability, the output of efficient ultra-short pulse laser, are easy to encapsulate, it is easy to accomplish industrialization production application.
Detailed description of the invention
Fig. 1 is the knot of the embodiment one of the all-fiber Q-switch and mode-locking pulse laser of the dual resonant cavity coupling in the present invention
Structure schematic diagram；
Fig. 2 is the knot of the embodiment two of the all-fiber Q-switch and mode-locking pulse laser of the dual resonant cavity coupling in the present invention
Structure schematic diagram；
Fig. 3 is the knot of the embodiment three of the all-fiber Q-switch and mode-locking pulse laser of the dual resonant cavity coupling in the present invention
Structure schematic diagram；
Fig. 4 is the knot of the example IV of the all-fiber Q-switch and mode-locking pulse laser of the dual resonant cavity coupling in the present invention
Structure schematic diagram
Fig. 5 is the knot of the embodiment five of the all-fiber Q-switch and mode-locking pulse laser of the dual resonant cavity coupling in the present invention
Structure schematic diagram.
In figure: 1, pumping source；2, optical-fiber bundling device；3, the first gain fibre；4, the second gain fibre；5, the first reflection-type
Fiber bragg grating；6, the second reflection-type optical fiber Bragg grating；7, semiconductor saturable absorbing mirror；8, third reflection type optical
Fine Bragg grating；9, optoisolator；10, wavelength division multiplexer；11, circulator；12, fiber beam splitting.
Specific embodiment
Those skilled in the art are made to better understand technical solution of the present invention, it is right in the following with reference to the drawings and specific embodiments
The present invention elaborates.
As shown in Figures 1 to 5, a kind of all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling, wherein 1 is pump
The semiconductor laser diode that central wavelength is 976nm can be selected in Pu source；2 be optical-fiber bundling device, and the pump of (2+1) × 1 can be selected
Pu signal bundling device, such as 6/125 type or 10/125 type；3,4 be rare earth doped fiber, and the production of U.S. Nufern company can be selected
The Yb dosed optical fiber that core diameter is 6 μm or 10 μm；5,6,8 be reflection-type optical fiber Bragg grating, can be selected and is all-trans or part is anti-
Emitting grating, reflectivity is between zero and one；7 be semiconductor saturable absorbing mirror, and other reflective saturables can also be selected to inhale
Acceptor；9 be optoisolator, optional polarization independent optical isolator.
Embodiment one
As shown in Figure 1, a kind of all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling includes pump arrangement, swashs
Optical cavity, gain fibre, saturable absorption element and laser output device, pump arrangement include pumping source 1, optical-fiber bundling device
2 and wavelength division multiplexer 10；Laser resonator includes the first reflection-type optical fiber Bragg grating 5, second reflection-type optical fiber Prague
Grating 6, semiconductor saturable absorbing mirror (SESAM) 7, third reflection-type optical fiber Bragg grating 8, total reflective mirror 13；Gain fibre
Including the first gain fibre 3 and the second gain fibre 4；Laser output device includes optoisolator 9, circulator 11 and optical fiber point
Beam device 12.
When using linear cavity configuration, the first reflection-type optical fiber Bragg grating 5 and second reflection-type optical fiber Prague light
Grid 6 constitute interior resonance chamber, and intracavitary interior resonance includes the first gain fibre 3；Semiconductor saturable absorbing mirror 7 and third reflection type optical
Fine Bragg grating 8 constitutes exterior resonant cavity, includes the second gain fibre 4 in exterior resonant cavity, and interior resonance chamber is also contained in outside
Among resonant cavity.
Wherein, pumping source 1 is connect with the pumping input terminal of optical-fiber bundling device 2, the signal input part of optical-fiber bundling device 2 with
Optoisolator 9 is connected, and the common end of optical-fiber bundling device 2 is connect with one end of third reflection-type optical fiber Bragg grating 8, third
The other end of reflection-type optical fiber Bragg grating 8 is sequentially connected the second gain fibre 4 and the first reflection-type optical fiber Bragg grating
5, the other end of the first reflection-type optical fiber Bragg grating 5 successively with the first gain fibre 3, second reflection-type optical fiber Prague light
One end of grid 6 connects, and the other end of the second reflection-type optical fiber Bragg grating 6 directly connects with semiconductor saturable absorbing mirror (7)
Touching.
When using ring cavity structure, the first reflection-type optical fiber Bragg grating 5 and second reflection-type optical fiber Prague light
Grid 6 constitute resonance inner cavity, and resonance inner cavity includes the first gain fibre 3；Second gain fibre 4, circulator 11 and semiconductor can satisfy
The resonant external cavity of ring structure is constituted with absorbing mirror 7, and resonance inner cavity is included among resonant external cavity.
Wherein, pumping source 1 connects the pumping input terminal of wavelength division multiplexer 10, and the signal input part of wavelength division multiplexer 10 connects
One end of the first reflection-type optical fiber Bragg grating 5 is connect, the other end of the first reflection-type optical fiber Bragg grating 5 is sequentially connected
One gain fibre 3, the second reflection-type optical fiber Bragg grating 6, the second reflection-type optical fiber Bragg grating 6 and fiber optic splitter 12
Wherein one end of output end is connected, and the common end of wavelength division multiplexer 10 is sequentially connected the second gain fibre 4, circulator 11, ring
Wherein one end of shape device 11 is directly contacted with semiconductor saturable absorbing mirror 7.
When using linear cavity configuration or ring cavity structure, pumping source 1 generates pump light, by optical-fiber bundling device 2 or
Wavelength division multiplexer 10 is coupled into exterior resonant cavity, in the collective effect of the second gain fibre 4 and semiconductor saturable absorbing mirror 7
Under, generate Mode-locked laser；Then the Mode-locked laser that exterior resonant cavity generates enters in interior resonance chamber, in the first gain light
Under the saturable absorption effect of fibre 3, adjusting Q pulse laser is generated, the pulse laser that the interior resonance chamber generates can pass through outer resonance
Chamber after obtaining amplification, realizes that the laser of narrow pulse width and high single pulse energy exports eventually by output device.
The pump light that pumping source 1 generates enters third reflection-type optical fiber Prague light by the pumping end of optical-fiber bundling device 2
Then grid 8 pass through the second gain fibre 4, enter the first gain fibre 3 by the first reflection-type optical fiber Bragg grating 5, then
Reach the second reflection-type optical fiber Bragg grating 6, which is high transoid grating, i.e. reflectivity R, R >=99%,
Laser at the wavelength is almost all reflected back, and remaining light continues to be transferred to semiconductor saturable absorbing mirror 7,7 as reflection
Formula saturable absorber, low intensive light are absorbed, and high-intensitive light is reflected because of " bleaching " saturable absorber, by semiconductor
The light that saturable absorbing mirror 7 and the second reflection-type optical fiber Bragg grating 6 reflect back is again by the first gain fibre 3,
One reflection-type optical fiber Bragg grating 5, the second gain fibre 4, third reflection-type optical fiber Bragg grating 8, and closed by optical fiber
The common end of beam device 2 enters the signal end of optical-fiber bundling device 2, finally passes through optoisolator 9, realizes pulsed laser output.Partly lead
Body saturable absorbing mirror 7 and third reflection-type optical fiber Bragg grating 8 constitute exterior resonant cavity, and the pulsed light that exterior resonant cavity generates is logical
It crosses the first reflection-type optical fiber Bragg grating 5 and enters the first gain fibre 3, then reach second reflection-type optical fiber Prague light
Grid 6, the first reflection-type optical fiber Bragg grating 5 and the second reflection-type optical fiber Bragg grating 6 constitute interior resonance chamber.In pumping source
Under 1 excitation, exterior resonant cavity is initially formed laser pulse, and then internal resonant cavity is pumped, and exports the laser of another wavelength, according to
It is secondary to be put by the second gain fibre 4, third reflection-type optical fiber Bragg grating 8, optical-fiber bundling device 2 and optoisolator 9
Big output.
Embodiment two
As shown in Fig. 2, basic structure is close with embodiment 1, difference is for pumping source 1 and optical-fiber bundling device 2 to be put into
Between first reflection-type optical fiber Bragg grating 5 and the second gain fibre 4.Laser can be reduced to a certain extent in this way
Export the requirement to device.
Embodiment three
As shown in Figure 3.1 is pumping source in figure, and the semiconductor laser diode that central wavelength is 976nm can be selected；2 be light
The pump signal bundling device of (2+1) × 1, such as 6/125 type or 10/125 type can be selected in fine bundling device；3,4 be rare earth doped fiber,
The Yb dosed optical fiber that the core diameter of U.S. Nufern company production is 6 μm or 10 μm can be selected；5,8 be reflection-type optical fiber Bradley
Lattice grating can be selected and be all-trans or partially reflective grating, and reflectivity is between zero and one；7 be broadband semiconductor saturable absorption
Mirror can also select other broadband reflective saturable absorbers；9 be optoisolator, optional polarization independent optical isolator.
The pump light that pumping source 1 generates enters the second gain fibre 4 by the pumping end of optical-fiber bundling device 2, then reaches
Third reflection-type optical fiber Bragg grating 8, the fiber bragg grating are high transoid grating, i.e. reflectivity R, R >=99%, the wave
The laser of strong point is almost all reflected back, and again by the second gain fibre 4, and passes through the common end of optical-fiber bundling device 2
Into the signal end of optical-fiber bundling device 2, successively pass through the first reflection-type optical fiber Bragg grating 5, the first gain fibre 3, broadband
The reflection bandwidth of semiconductor saturable absorbing mirror 7, the semiconductor saturable absorbing mirror 7 is wider, can cover the first reflection
Wavelength where type fiber bragg grating 5 and third reflection-type optical fiber Bragg grating 8, and by the first reflection-type optical fiber Bradley
High-intensitive light at 8 wavelength of lattice grating 5 and third reflection-type optical fiber Bragg grating reflects back, so that it is defeated to generate pulse
Out.Broadband semiconductor saturable absorbing mirror 7 and third reflection-type optical fiber Bragg grating 8 constitute exterior resonant cavity, the first reflection-type
Fiber bragg grating 5 and broadband semiconductor saturable absorbing mirror 7 constitute interior resonance chamber.Under the excitation of pumping source 1, outer resonance
Chamber is initially formed laser pulse, and then internal resonant cavity is pumped, and exports the laser of another wavelength, successively passes through optical-fiber bundling device
2, the second gain fibre 4, third reflection-type optical fiber Bragg grating 8, optoisolator 9 amplify output.
Example IV
As shown in figure 4, the pump light that pumping source 1 generates enters the second gain fibre by the pumping end of optical-fiber bundling device 2
4, then reaching semiconductor saturable absorbing mirror 7,7 is reflective saturable absorber, and low intensive light is absorbed at the wavelength,
High-intensitive light is reflected because of " bleaching " saturable absorber, to generate pulse.Reflected light is again by the second gain
Optical fiber 4, and enter by the common end of optical-fiber bundling device 2 signal end of optical-fiber bundling device 2, successively pass through the second reflection-type optical fiber
Bragg grating 6, the first gain fibre 3, the first reflection-type optical fiber Bragg grating 5, third reflection-type optical fiber Bragg grating
8, the reflectivity of third reflection-type optical fiber Bragg grating 8 is R, R >=99%, and the laser at the wavelength is almost all reflected back
It goes, semiconductor saturable absorbing mirror 7 and third reflection-type optical fiber Bragg grating 8 constitute exterior resonant cavity, the first reflection-type optical fiber
Bragg grating 5 and the second reflection-type optical fiber Bragg grating 6 constitute interior resonance chamber, under the excitation of pumping source 1, exterior resonant cavity
It is initially formed laser pulse, then internal resonant cavity is pumped, and exports the laser of another wavelength, successively passes through third reflection type optical
Fine Bragg grating 8, optoisolator 9 export.
Embodiment five
As shown in figure 5,1 is pumping source, the semiconductor laser diode that central wavelength is 976nm can be selected；10 be wavelength-division
The single mode wavelength division multiplexer of 980/1060nm can be selected in multiplexer；3,4 be rare earth doped fiber, and U.S. Nufern company can be selected
The Yb dosed optical fiber that the core diameter of production is 6 μm or 10 μm；5,6 be reflection-type optical fiber Bragg grating, can be selected and is all-trans or portion
Divide reflection-type grating, reflectivity is between zero and one；7 be semiconductor saturable absorbing mirror, can also select and other reflective satisfy
And absorber；9 be optoisolator, optional polarization independent optical isolator；11 be circulator；12 be fiber optic splitter, can be selected 90:
10 fiber optic splitter.
The pump light that pumping source 1 generates passes through the end 980nm of wavelength division multiplexer 10, enters the second gain fibre 4, then
Enter from the port a of circulator 11, by the port b, is transferred to semiconductor saturable absorbing mirror 7, low intensive light at the wavelength
It is absorbed, high-intensitive light is all reflected, and generates pulse output, reflected light is by the port c, by fiber optic splitter
12, outside 10% light output to chamber, 90% light continues in intracavitary transmission, then in turn through second reflection-type optical fiber Prague
Grating 6, the first gain fibre 3, the first reflection-type optical fiber Bragg grating 5, finally by the end 1060nm of wavelength division multiplexer 10
Carry out next cycle circulation.First reflection-type optical fiber Bragg grating 5 and the second reflection-type optical fiber Bragg grating 6 are constituted
Interior resonance chamber, connect the end 1060nm of wavelength division multiplexer 10 later, 90% end of fiber optic splitter 12, circulator 11 constitute it is outer humorous
Shake chamber.Under the excitation of pumping source 1, exterior resonant cavity generates laser pulse first, and then internal resonant cavity is pumped, and generates another
The laser pulse of one wavelength is exported by 10% port of fiber optic splitter 12.
Above embodiments are only exemplary embodiment of the present invention, are not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make respectively the present invention
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.
Claims (9)
1. a kind of all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling, which is characterized in that including pump arrangement, swash
Optical cavity, gain fibre and laser output device, the laser have linear cavity or ring cavity structure, are swashed with exporting pulse
Light, wherein
The pump arrangement includes pumping source (1), optical-fiber bundling device (2) and wavelength division multiplexer (10)；
The laser resonator includes the first reflection-type optical fiber Bragg grating (5), the second reflection-type optical fiber Bragg grating
(6), semiconductor saturable absorbing mirror (7), third reflection-type optical fiber Bragg grating (8), total reflective mirror (13)；
The gain fibre includes the first gain fibre (3) and the second gain fibre (4)；
The laser output device includes optoisolator (9), circulator (11) and fiber optic splitter (12)；
When using linear cavity configuration, the first reflection-type optical fiber Bragg grating (5) and second reflection-type optical fiber Prague
Grating (6) constitutes interior resonance chamber, and the intracavitary interior resonance includes the first gain fibre (3)；Semiconductor saturable absorbing mirror (7) with
Third reflection-type optical fiber Bragg grating (8) constitutes exterior resonant cavity, includes the second gain fibre (4) in the exterior resonant cavity, and
And interior resonance chamber is also contained among exterior resonant cavity；
Wherein, the pumping source (1) connect with the pumping input terminal of optical-fiber bundling device (2), the signal of the optical-fiber bundling device (2)
Input terminal is connected with optoisolator (9), the common end of the optical-fiber bundling device (2) and third reflection-type optical fiber Bragg grating
(8) one end connection, the other end of the third reflection-type optical fiber Bragg grating (8) are sequentially connected the second gain fibre (4)
With the first reflection-type optical fiber Bragg grating (5), the other end of the first reflection-type optical fiber Bragg grating (5) is successively with
One end connection of one gain fibre (3), the second reflection-type optical fiber Bragg grating (6), second reflection-type optical fiber Prague
The other end of grating (6) is directly contacted with semiconductor saturable absorbing mirror (7)；
When using ring cavity structure, the first reflection-type optical fiber Bragg grating (5) and second reflection-type optical fiber Prague
Grating (6) constitutes resonance inner cavity, and the resonance inner cavity includes the first gain fibre (3)；Second gain fibre (4), annular
Device (11) and semiconductor saturable absorbing mirror (7) constitute the resonant external cavity of ring structure, and resonance inner cavity is included in outside resonance
Among chamber；
Wherein, the pumping input terminal of pumping source (1) connection wavelength division multiplexer (10), the signal of the wavelength division multiplexer (10)
Input terminal connects one end of the first reflection-type optical fiber Bragg grating (5), the first reflection-type optical fiber Bragg grating (5)
The other end is sequentially connected the first gain fibre (3), the second reflection-type optical fiber Bragg grating (6), second reflection-type optical fiber
Bragg grating (6) is connected with wherein one end of fiber optic splitter (12) output end, the wavelength division multiplexer (10) it is public
End is sequentially connected the second gain fibre (4), circulator (11), and wherein one end of the circulator (11) can directly satisfy with semiconductor
It is contacted with absorbing mirror (7)；
When using linear cavity configuration or ring cavity structure, the pumping source (1) generates pump light, passes through optical-fiber bundling device
(2) or wavelength division multiplexer (10) is coupled into exterior resonant cavity, in second gain fibre (4) and semiconductor saturable absorbing mirror
(7) under collective effect, Mode-locked laser is generated；Then the Mode-locked laser that the exterior resonant cavity generates enters interior resonance
In chamber, under the saturable absorption effect of first gain fibre (3), adjusting Q pulse laser is generated, the interior resonance chamber generates
Pulse laser can realize narrow pulse width and high simple venation eventually by output device by exterior resonant cavity, after obtaining amplification
Rush the laser output of energy.
2. the all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling according to claim 1, which is characterized in that
The pumping source (1) is in semiconductor laser, gas laser, solid state laser, optical fiber laser or Ramar laser
One of which, the central wavelength range for exporting pump light is 700nm≤λ≤2000nm.
3. the all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling according to claim 1, which is characterized in that
In the linear cavity configuration, the optical-fiber bundling device (2) is changed to wavelength division multiplexer (10)；The second reflection-type optical fiber Bradley
Lattice grating (6) and third reflection-type optical fiber Bragg grating (8) are changed to total reflective mirror (13)；The first reflection-type optical fiber Bradley
Lattice grating (5), the second reflection-type optical fiber Bragg grating (6), third reflection-type optical fiber Bragg grating (8) reflectivity be R,
Wherein 0 < R < 1；The first reflection-type optical fiber Bragg grating (5) and the second reflection-type optical fiber Bragg grating (6) use
Same Wavelength parameter, reflectivity are identical or different；It is anti-that the wave-length coverage of the semiconductor saturable absorbing mirror (7) covers third
The wavelength of emitting fiber bragg grating (8), reflectivity are identical or different.
4. the all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling according to claim 1, which is characterized in that
In the ring cavity structure, the wavelength division multiplexer (10) is changed to optical-fiber bundling device (2).
5. the all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling according to claim 1, which is characterized in that
In the ring cavity structure, the optoisolator (9) is placed between circulator (11) and fiber optic splitter (12), and described
The splitting ratio of fiber optic splitter (12) is between 0 to 1.
6. the all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling according to claim 1, which is characterized in that
First gain fibre (3) and the second gain fibre (4) are the optical fiber or photonic crystal fiber of rare earth doped element, wherein mixing
Miscellaneous rare earth element is one or more of ytterbium, erbium, holmium, thulium, samarium, bismuth.
7. the all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling according to claim 1, which is characterized in that
The optical-fiber bundling device (2) be (2+1) × 1 optical-fiber bundling device or (6+1) × 1 optical-fiber bundling device, be polarization beam combiner or
One of which in unpolarized bundling device.
8. the all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling according to claim 1, which is characterized in that
The semiconductor saturable absorbing mirror (7) is changed to one in graphene, graphene oxide, carbon nanotube or topological insulator
Kind.
9. the all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling according to claim 1, which is characterized in that
The pump mode be the single-ended pumping of fibre core, fibre core both-end pumping, covering it is single-ended pump or covering both-end pumping in wherein one
Kind.
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| CN109946788A (en) * | 2019-03-28 | 2019-06-28 | 深圳大学 | Restructural liquid-core optical fibre and preparation method thereof, laser and preparation method thereof |
| CN111525373A (en) * | 2020-03-30 | 2020-08-11 | 宁波索拉科技有限公司 | Ultra-narrow linewidth fiber laser based on double-grating compression ring resonant cavity |
| CN112886373A (en) * | 2021-01-13 | 2021-06-01 | 电子科技大学 | Dual-waveband high-energy rectangular laser pulse generation system with all-fiber structure |
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| CN114430140A (en) * | 2022-01-20 | 2022-05-03 | 广东工业大学 | 1.7 mu m mode-locked fiber laser based on GaSb single crystal semiconductor composite optical fiber |
| CN114498260A (en) * | 2021-12-31 | 2022-05-13 | 北京交通大学 | Stable switchable wavelength pulse fiber laser |
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| CN109946788B (en) * | 2019-03-28 | 2024-03-26 | 深圳大学 | Reconfigurable liquid core optical fiber and preparation method thereof, laser and preparation method thereof |
| US11152757B2 (en) * | 2019-06-06 | 2021-10-19 | Coherent, Inc. | High repetition rate seed laser |
| WO2021115145A1 (en) * | 2019-12-10 | 2021-06-17 | 苏州创鑫激光科技有限公司 | Fiber laser |
| CN111525373A (en) * | 2020-03-30 | 2020-08-11 | 宁波索拉科技有限公司 | Ultra-narrow linewidth fiber laser based on double-grating compression ring resonant cavity |
| CN112886373A (en) * | 2021-01-13 | 2021-06-01 | 电子科技大学 | Dual-waveband high-energy rectangular laser pulse generation system with all-fiber structure |
| CN113314928A (en) * | 2021-04-19 | 2021-08-27 | 中国科学院福建物质结构研究所 | High repetition frequency 1.55 mu m all-fiber pulse laser |
| CN114361923A (en) * | 2021-12-29 | 2022-04-15 | 北京工业大学 | Mid-infrared parametric oscillator based on all-fiber laser pumping |
| CN114498260A (en) * | 2021-12-31 | 2022-05-13 | 北京交通大学 | Stable switchable wavelength pulse fiber laser |
| CN114430140A (en) * | 2022-01-20 | 2022-05-03 | 广东工业大学 | 1.7 mu m mode-locked fiber laser based on GaSb single crystal semiconductor composite optical fiber |
| CN114430140B (en) * | 2022-01-20 | 2022-12-30 | 广东工业大学 | 1.7 mu m mode-locked fiber laser based on GaSb monocrystal semiconductor composite fiber |
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