CN105826801B - A kind of dual-wavelength tunable Ultra-short Fiber Laser - Google Patents
A kind of dual-wavelength tunable Ultra-short Fiber Laser Download PDFInfo
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- CN105826801B CN105826801B CN201610296532.3A CN201610296532A CN105826801B CN 105826801 B CN105826801 B CN 105826801B CN 201610296532 A CN201610296532 A CN 201610296532A CN 105826801 B CN105826801 B CN 105826801B
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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
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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
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
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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
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Abstract
A kind of tunable wave length Ultra-short Fiber Laser is claimed in the present invention, and the invention mainly comprises the broadband optical fiber ring mirrors (9) (15) that pumping source (1) (10), wavelength division multiplexer (2) (4) (6) (11), gain fibre (3) (12), graphene saturable absorber (5), fiber coupler (7) (13), circulator (16) (17), reflective tunable filter (8) (14), 50:50 fiber coupler form.The present invention uses Crossed Circle chamber or bilinearity cavity configuration, wavelength division multiplexer (4) (6) and graphene saturable absorber (5) branch common as Crossed Circle chamber or bilinearity cavity configuration, it is wide using the wavelength absorption range of graphene saturable absorber, absorb the advantages that steady, low saturation intensity, Ultrafast recovery time, can realize that optical fiber laser stablizes the output synchronization short pulse that Single wavelength is tunable, dual wavelength interval is big in conjunction with reflective tunable filter.
Description
Technical field
The invention belongs to laser technology and non-linear optical field, specially a kind of dual-wavelength tunable short pulse optical fiber swashs
Light device.
Background technique
As existing dual wavelength short pulse solid state laser is there is operation and technology is complicated, bulky, low efficiency
Under, poor reliability the defects of, significantly limit dual wavelength short-pulse laser use scope, be only limited to make in laboratory at present
With.And dual wavelength Ultra-short Fiber Laser is since with being lost, small, compactedness is high, optical fiber degree is high, high-efficient, thermal diffusivity
It is good, with communication optical fiber good compatibility, thus get more and more people's extensive concerning, in laser processing, communication sensing, detection diagnosis, raw
The various fields such as object medicine, spectroscopy, military affairs have wide prospect.
The method of synchronization of existing dual wavelength Ultra-short Fiber Laser mainly has actively and passively two ways.Masters
Formula has the advantages that repetition rate is high, line width, but the active modulation device introduced destroys all optical fibre structure, and cost compared with
It is high.Passive mode such as uses nonlinear loop mirror (NOLM), nonlinear polarization rotation technology (NPR), semiconductor saturable absorption
Mirror (SESAM) and be based on technologies or the device such as single-walled carbon nanotube (SWCNT) and graphene (Graphene), used extensively
In the generation of short pulse.Wherein graphene makes its absorption region from visible light to far red light due to zero bandgap structure, has and wave
Long unrelated and more stable Absorption Characteristics, therefore graphene usually regards dual wavelength Ultra-short Fiber Laser as and can preferably satisfy
And absorber.
Its single wavelength of existing dual wavelength Ultra-short Fiber Laser is mostly untunable, limits its scope of application,
And the dual wavelength short pulse tunable optical fiber laser for reflective tunable optic filter is added keeping dual wavelength all tunable expands
Its big application range, with more actual use value.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the production of current dual-wavelength tunable short-pulse laser complicated, no
Stable, at high cost, the problems such as tuning difficulty is big, optical fiber degree is low, dual wavelength interval is small, provide a kind of optical fiber degree it is high,
Production is simple, relative inexpensiveness, can stablize the synchronization Ultra-short Fiber Laser that output easily tunes and dual wavelength interval is big.This
The technical solution of invention is as follows:
A kind of dual-wavelength tunable Ultra-short Fiber Laser comprising: for generating the tunable short arteries and veins of first wave length
Wash the fibre laser first branch, the tunable Ultra-short Fiber Laser second branch for generating second wave length off, for dividing
Generation is modulated from in conjunction with the first, second wavelength, and in conjunction with the first branch, the linear cavity of second branch composition or annular chamber
The common branch of short pulse, the first reflective tunable filter for selecting first wave length and for selecting second wave length
Two reflective tunable filters, the public tuning branch includes the second wavelength division multiplexer, the graphene being sequentially connected in series can
Saturated absorbing body and third wavelength division multiplexer, the tunable short pulse first branch by common branch and first it is reflective can
Tunable filter is connected, and generates tunable short pulse optical-fiber laser；The tunable short pulse second branch passes through common branch
It is connected with the second reflective tunable filter.
Further, the tunable Ultra-short Fiber Laser first branch and tunable Ultra-short Fiber Laser the
Connection between two branches includes following connection type: the i.e. tunable short pulse first branch and tunable short pulse second branch
Between it is first in parallel after be connected in series again with public tuning branch；Or the tunable Ultra-short Fiber Laser first branch passes through
First annular device, tunable Ultra-short Fiber Laser second branch are connected in parallel on public tuning branch by the second circulator respectively
Both ends；Or the tunable short pulse first branch carries out the company of series connection with tunable short pulse second branch by public tuning branch
It connects.
Further, when between the tunable short pulse first branch and tunable short pulse second branch first it is in parallel after again with
Public tuning branch be connected in series or the tunable short pulse first branch passes through public tuning branch and tunable short pulse
It include for pumping the first pumping source of the first gain fibre, being used for the first pumping source when second branch is connected in series
The first wavelength division multiplexer in laser coupled to linear cavity or annular chamber, the first gain for inspiring first wave length laser
Optical fiber, the first fiber coupler for exporting first wave length laser, the first broadband optical fiber for reflecting first wave length laser
Ring mirror, tunable short pulse second branch include for pumping the second pumping source of the second gain fibre, for pumping second
Source laser is coupled to the 4th wavelength division multiplexer in linear cavity or annular chamber, the second wave length laser for inspiring)
It is two gain fibres, the second fiber coupler for exporting second wave length laser, second for reflecting second wave length laser wide
Band fiber loop mirror, the tunable Ultra-short Fiber Laser first branch pass through first annular device, tunable short pulse optical-fiber laser
Include when device second branch is connected in parallel on the both ends of public tuning branch by the second circulator respectively except the first broadband optical fiber ring mirror,
Other above-mentioned devices except second broadband optical fiber ring mirror.
Further, when between the tunable short pulse first branch and tunable short pulse second branch first it is in parallel after again with
When common branch is connected in series, the first pumping source connects the first wavelength division multiplexer and pumps input terminal a, the first broadband optical fiber ring
Mirror the first fiber coupler signal input part j, the first fiber coupler signal output end k connection first wave division multiplexer signal are defeated
Enter and hold b, first wave division multiplexer signal output end c the first gain fibre of connection, the first gain fibre other end connects the second wave
Division multiplexer signal input terminal d, the second wavelength division multiplexer signal output end f connection graphene saturable absorber, graphene can
The saturated absorbing body other end connects third wavelength division multiplexer signal input part g, third wavelength division multiplexer signal output end h connection the
One reflective tunable filter forms first via linear cavity, and the laser that first via linear cavity generates is by the first fiber coupler coupling
Close output end l output；Second pumping source connects the 4th wavelength division multiplexer and pumps input terminal m, second broadband optical fiber ring the second light of mirror
Fine coupler signal input terminal p, the 4th wavelength division multiplexer signal input part n of the second fiber coupler signal output end q connection, the
Four wavelength division multiplexer signal output end o the second gain fibres of connection, the second gain fibre other end connect the second wavelength division multiplexer
Signal input part e, the second wavelength division multiplexer signal output end f connection graphene saturable absorber, graphene saturable absorption
The body other end connects third wavelength division multiplexer signal input part g, and third wavelength division multiplexer signal output end i connection second is reflective
Tunable filter forms the second linear chamber, and the laser that the second linear chamber generates is by the second fiber coupler coupled output r
Output.
Further, first pumping source and the second pumping source are semiconductor laser, solid-state laser, gas laser
Any one in device, optical fiber laser, output center wavelength are in 793nm, 980nm, 1570nm among three kinds respectively
Any one, and the two output center wavelength is inconsistent.
Further, first gain fibre and the second gain fibre are single covering or Double clad rare-earth doping light
Fibre, wherein the rare earth element adulterated is one or more of ytterbium, bait, thulium, holmium.
Further, the graphene saturable absorber can also be graphene oxide saturable absorber, the two layer
Number is single layer, bilayer, multilayer.
Further, first wavelength division multiplexer, the second wavelength division multiplexer, third wavelength division multiplexer, the first optical fiber coupling
Clutch, the 4th wavelength division multiplexer, signal can be inputted inversely in the second fiber coupler, i.e., it is defeated can also to make signal for signal input part
Outlet, signal output end can also make signal input part；Second wavelength division multiplexer and third wavelength division multiplexer can be with are as follows: 1550/
Any one in tri- kinds of operation wavelength modes of 2000nm, 1550/1050nm, 1050/2000nm, the two operation wavelength is consistent.
Further, second wavelength division multiplexer and third wavelength division multiplexer can change into multichannel wavelength division multiplexer into,
Dual-wavelength tunable Ultra-short Fiber Laser is set to be extended to multi-wavelength tunable Ultra-short Fiber Laser.
Further, the described first reflective tunable filter and the second reflective tunable filter operation wavelength are respectively
Any one among tri- kinds of 1550nm, 2000nm, 1050nm, the two operation wavelength is inconsistent, and the two reflectivity is all R,
In 0.9 < R < 1.
It advantages of the present invention and has the beneficial effect that:
Dual-wavelength tunable Ultra-short Fiber Laser of the present invention has the advantage that
1. the optical fiber laser is using the optical fiber of rare earth doped element as gain media and graphene or graphite oxide
Alkene designs, all optical fibre structure as saturable absorber in conjunction with two-chamber, does not have to spatial modulation device, structure is relatively easy, is easy to
Adjustment, environmental stability are good；
2. the optical fiber laser is using graphene or graphene oxide as saturable absorber, the two is inhaled with wavelength
It receives wide range, low saturation intensity, the Ultrafast recovery time, absorb the advantages that steady；
3. the optical fiber laser short pulse output dual wavelength interval is big, dual wavelength can be adjusted respectively, and easy two kinds of realization is not
Co-wavelength tuning is synchronous with short pulse.
Detailed description of the invention
Fig. 1 is that the present invention provides 1 dual-wavelength tunable Ultra-short Fiber Laser basic schematic diagram of preferred embodiment；
Fig. 2 is 2 dual-wavelength tunable Ultra-short Fiber Laser basic schematic diagram of embodiment；
Fig. 3 is 3 dual-wavelength tunable Ultra-short Fiber Laser basic schematic diagram of embodiment；
In figure: 1, the first pumping source；2, the first wavelength division multiplexer；3, the first gain fibre；4, the second wavelength division multiplexer；5,
Graphene saturable absorber；6, third wavelength division multiplexer；7, the first fiber coupler；8, the first reflective tunable filter；
9, the broadband optical fiber ring mirror of the first 50:50 fiber coupler composition；10, the second pumping source；11, the 4th wavelength division multiplexer；12,
Two gain fibres；13, the second fiber coupler；14, the second transmission-type tunable filter；15, the 2nd 50:50 fiber coupler group
At broadband optical fiber ring mirror；16, first annular device；17, the second circulator.
Specific embodiment
Below in conjunction with attached drawing, the invention will be further described:
As shown in Figure 1, embodiment 1
A kind of dual-wavelength tunable Ultra-short Fiber Laser basic schematic diagram is as shown in Figure 1.1,10 be respectively the in figure
One, the second pumping source, can select central wavelength respectively is the semiconductor laser diode of 1570nm, 980nm；2,11 are respectively
The first, the 4th wavelength division multiplexer can select 1570/2000nm, 980/1550nm wavelength division multiplexer respectively；3,12 be respectively the
One, the second gain fibre can be selected respectively and mix thulium, mix bait single mode optical fiber；4,6 be respectively second, third wavelength division multiplexer, can
Select 1550/2000nm wavelength division multiplexer；5 be graphene saturable absorber, using spin-coating method by polymethyl
Sour methyl esters (PMMA) is coated on the graphene thin layer of copper substrate, and then it is placed in ammonium persulfate aqueous solution and eliminates copper substrate
Polymethyl methacrylate/graphene heap is formed, is captured it with optical fiber contact pins, is clipped in two wire jumper heads after drying in an oven
Between, and wire jumper head is fixed with ring flange and is made；7,13 be respectively the first, second fiber coupler, can be selected respectively
The 20:80 output optical fibre coupler of cardiac wave a length of 2000nm, 1550nm, wherein 80% exports for coupling, 20% for recycling；
8,14 be respectively the first, second reflective tunable filter, and can select central wavelength respectively is the adjustable of 2000nm, 1550nm
Humorous Fiber Bragg Grating, reflectivity R, wherein 0.9 < R < 1；9,15 be respectively the first, second 50:50 fiber coupler group
At broadband optical fiber ring mirror, can select respectively central wavelength be 2000nm, 1550nm fiber coupler be used to form broadband
Fiber loop mirror.
First pumping source 1 connects the first wavelength division multiplexer 2 and pumps input terminal a, the width of the first 50:50 fiber coupler composition
Band 9 first fiber coupler of fiber loop mirror, 7 signal input part j, 7 signal output end k the first wavelength-division of connection of the first fiber coupler
2 signal input part b of multiplexer, 2 the first gain fibre of signal output end c connection 3 of the first wavelength division multiplexer, the first gain fibre 3
The other end connects 4 signal input part d of the second wavelength division multiplexer, and 4 signal output end f connection graphene of the second wavelength division multiplexer can satisfy
With absorber 5,5 other end of graphene saturable absorber connects 6 signal input part g of third wavelength division multiplexer, and third wavelength-division is multiple
With 6 the first reflective tunable filter 8 of signal output end h connection of device, first via linear cavity is formed, what first via linear cavity generated
Laser is exported by 7 coupled output l of the first fiber coupler；Second pumping source 10 connects the pumping input of the 4th wavelength division multiplexer 11
Hold m, 15 second fiber coupler of broadband optical fiber ring mirror, the 13 signal input part p of the 2nd 50:50 fiber coupler composition, the second light
Fine 13 the 4th wavelength division multiplexer of signal output end q connection of coupler, 11 signal input part n, the output of 11 signal of the 4th wavelength division multiplexer
Hold the second gain fibre of o connection 12, the second wavelength division multiplexer of 12 other end of the second gain fibre connection 4 signal input part e, second
4 signal output end f connection graphene saturable absorber 5 of wavelength division multiplexer, 5 other end of graphene saturable absorber connection the
Three wavelength division multiplexers, 6 signal input part g, 6 signal output end i the second reflective tunable filter of connection of third wavelength division multiplexer
14, the second linear chamber is formed, the laser that the second linear chamber generates is exported by 13 coupled output r of the second fiber coupler；
Second wavelength division multiplexer 4, graphene saturable absorber 5 and third wavelength division multiplexer 6 are used as the same branch of two linear cavities.
Embodiment 2
A kind of dual-wavelength tunable Ultra-short Fiber Laser basic schematic diagram is as shown in Figure 2.1,10 be respectively the in figure
One, the second pumping source, can select central wavelength respectively is the semiconductor laser diode of 1570nm, 980nm；2,11 are respectively
The first, the 4th wavelength division multiplexer can select 1570/2000nm, 980/1550nm wavelength division multiplexer respectively；3,12 be respectively the
One, the second gain fibre can be selected respectively and mix thulium, mix bait single mode optical fiber；4,6 be respectively second, third wavelength division multiplexer, can
Select 1550/2000nm wavelength division multiplexer；5 be graphene saturable absorber, using spin-coating method by polymethyl
Sour methyl esters (PMMA) is coated on the graphene thin layer of copper substrate, and then it is placed in ammonium persulfate aqueous solution and eliminates copper substrate
Polymethyl methacrylate/graphene heap is formed, is captured it with optical fiber contact pins, is clipped in two wire jumper heads after drying in an oven
Between, and wire jumper head is fixed with ring flange and is made；7,13 be respectively the first, second fiber coupler, can be selected respectively
The 20:80 output optical fibre coupler of cardiac wave a length of 2000nm, 1550nm, wherein 80% exports for coupling, 20% for recycling；
8,14 be respectively the first, second reflective tunable filter, and can select central wavelength respectively is the adjustable of 2000nm, 1550nm
Humorous Fiber Bragg Grating, reflectivity R, wherein 0.9 < R < 1；16,17 be respectively the first, second circulator, can be distinguished
Selecting central wavelength is the optical fiber circulator of 2000nm, 1550nm.
First pumping source 1 connects the first wavelength division multiplexer 2 and pumps input terminal a, 2 signal output end c of the first wavelength division multiplexer
The first gain fibre 3 is connected, 3 other end of the first gain fibre connects first annular 16 signal input part s of device, first annular device 16
4 signal input part d of the second wavelength division multiplexer of signal output end u connection, 4 signal output end f connection graphite of the second wavelength division multiplexer
Alkene saturable absorber 5,5 other end of graphene saturable absorber connect 6 signal input part g of third wavelength division multiplexer, third
6 the first fiber coupler of signal output end h connection of wavelength division multiplexer, 7 signal input part j, the output of 7 signal of the first fiber coupler
2 signal input part b of the first wavelength division multiplexer of k connection is held, the first fiber annular resonant cavity is formed, wherein among first annular device 16
The reflective tunable filter 8 of t connection first is held, the laser that the first fiber annular resonant cavity generates is through 7 coupling of the first fiber coupler
Close output end l output；Second pumping source 10 connects the 4th wavelength division multiplexer 11 and pumps input terminal m, the 4th wavelength division multiplexer 11 letter
Number the second gain fibre of output end o connection 12,12 other end of the second gain fibre connect 17 signal input part v of the second circulator,
Second circulator, 17 the second wavelength division multiplexer of signal output end x connection, 4 signal input part e, the output of 4 signal of the second wavelength division multiplexer
F connection graphene saturable absorber 5 is held, it is defeated that 5 other end of graphene saturable absorber connects 6 signal of third wavelength division multiplexer
Enter and holds g, 6 the second fiber coupler of signal output end i connection of third wavelength division multiplexer, 13 signal input part p, the second fiber coupling
13 the 4th wavelength division multiplexer of signal output end q connection of device, 11 signal input part n forms the second fiber annular resonant cavity, wherein the
17 the second reflective tunable filter 14 of intermediate ends w connection of second ring device, the laser that the second fiber annular resonant cavity generates is through the
Two fiber couplers, 13 coupled output r output；Second wavelength division multiplexer 4, graphene saturable absorber 5 and third wavelength-division are multiple
Use the combination of device 6 as the same branch of Crossed Circle cavity configuration.
Embodiment 3
A kind of dual-wavelength tunable Ultra-short Fiber Laser basic schematic diagram is as shown in Figure 3.1,10 be respectively the in figure
One, the second pumping source, can select central wavelength respectively is the semiconductor laser diode of 1570nm, 980nm；2,11 are respectively
The first, the 4th wavelength division multiplexer can select 1570/2000nm, 980/1550nm wavelength division multiplexer respectively；3,12 be respectively the
One, the second gain fibre can be selected respectively and mix thulium, mix bait single mode optical fiber；4,6 be respectively second, third wavelength division multiplexer, can
Select 1550/2000nm wavelength division multiplexer；5 be graphene saturable absorber, using spin-coating method by polymethyl
Sour methyl esters (PMMA) is coated on the graphene thin layer of copper substrate, and then it is placed in ammonium persulfate aqueous solution and eliminates copper substrate
Polymethyl methacrylate/graphene heap is formed, is captured it with optical fiber contact pins, is clipped in two wire jumper heads after drying in an oven
Between, and wire jumper head is fixed with ring flange and is made；7,13 be respectively the first, second fiber coupler, can be selected respectively
The 20:80 output optical fibre coupler of cardiac wave a length of 2000nm, 1550nm, wherein 80% exports for coupling, 20% for recycling；
8,14 be respectively the first, second reflective tunable filter, and can select central wavelength respectively is the adjustable of 2000nm, 1550nm
Humorous Fiber Bragg Grating, reflectivity R, wherein 0.9 < R < 1；9,15 be respectively the first, second 50:50 fiber coupler group
At broadband optical fiber ring mirror, can select respectively central wavelength be 2000nm, 1550nm fiber coupler be used to form broadband
Fiber loop mirror.
First pumping source 1 connects the first wavelength division multiplexer 2 and pumps input terminal a, the width of the first 50:50 fiber coupler composition
Band fiber loop mirror 9 connects 7 signal input part j of the first fiber coupler, the 7 signal output end k connection first of the first fiber coupler
2 signal input part b of wavelength division multiplexer, 2 the first gain fibre of signal output end c connection 3 of the first wavelength division multiplexer, the first gain light
Fine 3 other ends connect 4 signal input part d of the second wavelength division multiplexer, 4 signal output end f connection graphene of the second wavelength division multiplexer
Saturable absorber 5,5 other end of graphene saturable absorber connect 6 signal input part g of third wavelength division multiplexer, third wave
6 the first reflective tunable filter 8 of signal output end h connection of division multiplexer, forms first via linear cavity, and first via linear cavity produces
Raw laser is exported by 7 coupled output l of the first fiber coupler；Second pumping source 10 connects the pumping of the 4th wavelength division multiplexer 11
The broadband optical fiber ring mirror 15 of input terminal m, the 2nd 50:50 fiber coupler composition connect 13 signal input part of the second fiber coupler
P, 13 the 4th wavelength division multiplexer of signal output end q connection of the second fiber coupler, 11 signal input part n, the 4th wavelength division multiplexer 11
The second gain fibre of signal output end o connection 12,12 other end of the second gain fibre connect the output of 6 signal of third wavelength division multiplexer
I is held, 6 signal input part g connection graphene saturable absorber 5 of third wavelength division multiplexer, graphene saturable absorber 5 is another
End connection 4 signal output end f of the second wavelength division multiplexer, the 4 signal input part e connection second of the second wavelength division multiplexer is reflective adjustable
Filter 14 forms the second linear chamber, and the laser that the second linear chamber generates is by 13 coupled output r of the second fiber coupler
Output；Second wavelength division multiplexer 4, graphene saturable absorber 5 and third wavelength division multiplexer 6 are used as the same branch of two linear cavities
Road.
Above embodiments only relate to a kind of output services mode of 1550/2000nm, can also increase 1550/1050nm,
Two kinds of operating modes of 1050/2000nm.
The above embodiment is interpreted as being merely to illustrate the present invention rather than limit the scope of the invention.?
After the content for having read record of the invention, technical staff can be made various changes or modifications the present invention, these equivalent changes
Change and modification equally falls into the scope of the claims in the present invention.
Claims (9)
1. a kind of dual-wavelength tunable Ultra-short Fiber Laser characterized by comprising for generating the adjustable of first wave length
The humorous Ultra-short Fiber Laser first branch, the tunable Ultra-short Fiber Laser second branch for generating second wave length,
For separating and combining the first, second wavelength, and the linear cavity or annular chamber that combine the first branch, second branch to form are adjusted
System generates the common branch of short pulse, the first reflective tunable filter (8) for selecting first wave length and for selecting the
The reflective tunable filter of the second of two wavelength (14), the public tuning branch include that the second wavelength-division being sequentially connected in series is answered
With device (4), graphene saturable absorber (5) and third wavelength division multiplexer (6), the tunable short pulse first branch passes through
Common branch is connected with the first reflective tunable filter (8), generates tunable short pulse optical-fiber laser；It is described tunable short
Pulse second branch is connected by common branch with the second reflective tunable filter (14)；
When between the tunable short pulse first branch and tunable short pulse second branch first it is in parallel after again with public tuning branch
Be connected in series or the tunable short pulse first branch is carried out by public tuning branch and tunable short pulse second branch
It include for pumping the first pumping source (1) of the first gain fibre, being used for the first pumping source laser coupled when series connection
The first wavelength division multiplexer (2) in linear cavity or annular chamber, the first gain fibre for inspiring first wave length laser
(3), the first fiber coupler (7) for exporting first wave length laser, the first broadband light for reflecting first wave length laser
Fine ring mirror (9), tunable short pulse second branch include for pumping the second pumping source (10) of the second gain fibre, for inciting somebody to action
The 4th wavelength division multiplexer (11), the second wave for inspiring in second pumping source laser coupled to linear cavity or annular chamber
The second gain fibre (12) of long laser, the second fiber coupler (13) for exporting second wave length laser, for reflecting the
Second broadband optical fiber ring mirror (15) of two wavelength lasers, the tunable Ultra-short Fiber Laser first branch pass through first annular device
(16), tunable Ultra-short Fiber Laser second branch is connected in parallel on public tuning branch by the second circulator (17) respectively
It include other above-mentioned devices in addition to the first broadband optical fiber ring mirror (9), the second broadband optical fiber ring mirror (15) when both ends.
2. dual-wavelength tunable Ultra-short Fiber Laser according to claim 1, which is characterized in that described tunable short
Connection between the pulse optical fiber first branch and tunable Ultra-short Fiber Laser second branch includes following connection
Mode: between the i.e. tunable short pulse first branch and tunable short pulse second branch first it is in parallel after again with public tuning branch
It is connected in series；Or the tunable Ultra-short Fiber Laser first branch passes through first annular device (16), tunable short pulse
Optical fiber laser second branch is connected in parallel on the both ends of public tuning branch by the second circulator (17) respectively；Or tunable short arteries and veins
The first branch is rushed to be connected in series by public tuning branch and tunable short pulse second branch.
3. dual-wavelength tunable Ultra-short Fiber Laser according to claim 1, which is characterized in that when tunable short arteries and veins
Rush between the first branch and tunable short pulse second branch it is first in parallel after when being connected in series again with common branch, first pumps
Pu source (1) connects the first wavelength division multiplexer (2) and pumps input terminal a, (9) first fiber coupler (7) of the first broadband optical fiber ring mirror
Signal input part j, the first fiber coupler (7) signal output end k the first wavelength division multiplexer of connection (2) signal input part b, first
Wavelength division multiplexer (2) signal output end c first gain fibre of connection (3), the first gain fibre (3) other end connect the second wavelength-division
Multiplexer (4) signal input part d, the second wavelength division multiplexer (4) signal output end f connection graphene saturable absorber (5), stone
Black alkene saturable absorber (5) other end connects third wavelength division multiplexer (6) signal input part g, third wavelength division multiplexer (6) letter
Number reflective tunable filter (8) of output end h connection first forms first via linear cavity, the laser that first via linear cavity generates
It is exported by the first fiber coupler (7) coupled output l；It is defeated that second pumping source (10) connects the pumping of the 4th wavelength division multiplexer (10)
Enter and holds m, the second broadband optical fiber ring mirror (15) second fiber coupler (13) signal input part p, the second fiber coupler (13) letter
Number the 4th wavelength division multiplexer (11) signal input part n of output end q connection, the 4th wavelength division multiplexer (11) signal output end o connection
Second gain fibre (12), the second gain fibre (12) other end connect the second wavelength division multiplexer (4) signal input part e, second
Wavelength division multiplexer (4) signal output end f connection graphene saturable absorber (5), graphene saturable absorber (5) other end
Third wavelength division multiplexer (6) signal input part g is connected, third wavelength division multiplexer (6) signal output end i connection second is reflective can
Tunable filter (14), forms the second linear chamber, and the laser that the second linear chamber generates is coupled by the second fiber coupler (13)
Output end r output.
4. dual-wavelength tunable Ultra-short Fiber Laser according to claim 1, which is characterized in that first pumping
Source (1) and the second pumping source (10) be semiconductor laser, solid-state laser, gas laser, any in optical fiber laser
One kind, output center wavelength are any one among three kinds in 793nm, 980nm, 1570nm respectively, and in the two output
Cardiac wave length is inconsistent.
5. dual-wavelength tunable Ultra-short Fiber Laser according to claim 1, which is characterized in that first gain
Optical fiber (3) and the second gain fibre (12) are single covering or Double clad rare-earth doped fiber, wherein the rare earth element adulterated is
One or more of ytterbium, bait, thulium, holmium.
6. dual-wavelength tunable Ultra-short Fiber Laser according to claim 1, which is characterized in that the graphene can
Saturated absorbing body (5) can also be graphene oxide saturable absorber, and the two number of plies is single layer, bilayer, multilayer.
7. dual-wavelength tunable Ultra-short Fiber Laser according to claim 1, which is characterized in that first wavelength-division
Multiplexer (2), the second wavelength division multiplexer (4), third wavelength division multiplexer (6), the first fiber coupler (7), the 4th wavelength-division multiplex
Signal can be inputted inversely in device (11), the second fiber coupler (13), i.e., signal input part can also make signal output end, signal
Output end can also make signal input part；Second wavelength division multiplexer (4) and third wavelength division multiplexer (6) can be with are as follows: 1550/
Any one in tri- kinds of operation wavelength modes of 2000nm, 1550/1050nm, 1050/2000nm, the two operation wavelength is consistent.
8. dual-wavelength tunable Ultra-short Fiber Laser according to claim 1, which is characterized in that second wavelength-division
Multiplexer (4) and third wavelength division multiplexer (6) can change into multichannel wavelength division multiplexer into, make dual-wavelength tunable short pulse optical fiber
Laser is extended to multi-wavelength tunable Ultra-short Fiber Laser.
9. dual-wavelength tunable Ultra-short Fiber Laser according to claim 1 or 2 or 3 or 4, which is characterized in that institute
State the first reflective tunable filter (8) and the second reflective tunable filter (14) operation wavelength be respectively 1550nm,
Any one among tri- kinds of 2000nm, 1050nm, the two operation wavelength is inconsistent, and the two reflectivity is all R, wherein 0.9 < R
< 1.
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