CN107968312A - One kind mixes bait Photonic Crystal Fiber Lasers - Google Patents
One kind mixes bait Photonic Crystal Fiber Lasers Download PDFInfo
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- CN107968312A CN107968312A CN201810035663.5A CN201810035663A CN107968312A CN 107968312 A CN107968312 A CN 107968312A CN 201810035663 A CN201810035663 A CN 201810035663A CN 107968312 A CN107968312 A CN 107968312A
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- 239000004038 photonic crystal Substances 0.000 title claims abstract description 29
- 230000010287 polarization Effects 0.000 claims abstract description 103
- 239000013307 optical fiber Substances 0.000 claims abstract description 31
- 230000003287 optical effect Effects 0.000 claims abstract description 21
- 239000013078 crystal Substances 0.000 claims abstract description 16
- 230000001419 dependent effect Effects 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 230000009514 concussion Effects 0.000 claims description 14
- 238000005086 pumping Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000005284 excitation Effects 0.000 claims description 2
- 238000003786 synthesis reaction Methods 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 238000002156 mixing Methods 0.000 abstract description 11
- 241000931526 Acer campestre Species 0.000 abstract description 5
- 238000011982 device technology Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 9
- 238000001228 spectrum Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 4
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000001953 sensory effect Effects 0.000 description 3
- 229910052691 Erbium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical group 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
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- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H01S3/06716—Fibre compositions or doping with active elements
-
- 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
- H01S3/06712—Polarising fibre; Polariser
-
- 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
- H01S3/06729—Peculiar transverse fibre profile
- H01S3/06741—Photonic crystal fibre, i.e. the fibre having a photonic bandgap
-
- 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
- H01S3/10061—Polarization control
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Lasers (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The present invention is suitable for field of laser device technology, provide one kind and mix bait Photonic Crystal Fiber Lasers, including forming the wavelength division multiplexer of annular chamber, mixing bait single mould photon crystal optical fiber, the first Polarization Controller, polarization-dependent isolator, the second Polarization Controller, coupler and wave filter, and it is external in the pump laser of wavelength division multiplexer.Bait Photonic Crystal Fiber Lasers provided in an embodiment of the present invention of mixing replace the traditionally combination using erbium-doped fiber and strong nonlinearity optical fiber by using the bait single mould photon crystal optical fiber of mixing with strong nonlinearity effect as gain media, and stable Single wavelength output is realized based on nonlinear polarization rotation.2 Polarization Controllers are added on the basis of traditional tunable filtering structure and weaken gain broadening effect, bait Photonic Crystal Fiber Lasers provided in an embodiment of the present invention of mixing not only improve the tunable ability of optical maser wavelength, and improve the stability of light source.
Description
Technical field
The invention belongs to field of laser device technology, more particularly to a kind of broad tuning, high s/n ratio mix bait photonic crystal light
Fibre laser.
Background technology
Narrow cable and wide optical fiber laser possesses the advantages of many notable, for example, high optical coherence, low noise, improvement system
Performance and sensing sensitivity etc.；Monitored in distributed petroleum pipeline, optical-fibre communications and sensory field of optic fibre are also widely used.
The implementation method of narrow cable and wide optical fiber laser has a variety of：Bragg reflector DBR (Distributed Bragg
Reflection) and distributed feedback DFB (Distributed Feed Back) optical fiber laser linear chamber, annular chamber
Structure, compound ring cavity, and introduce special optical fiber bragg grating FBG (Fibber Bragg Gratting) and be used as ultra-narrow
Bandpass filter.Recently, narrow line width regulatable optical fiber laser has aroused great concern, and swashs because adding these
The gas concentration signal of bigger can be captured after light device.Compare structure using low-loss adjustable harmonic device and appropriate coupling output
An Er with broad tuning ability is built:Yb co-doped fiber lasers.
With reference to tunable optic filter and nonlinear semiconductor image intensifer, the spectrum produced based on anti-four-wave mixing effect is narrow
Changing effect realizes the stabilization single-frequency oscillating laser output that tunable range is 48nm.Ytterbium Yb tune Q narrow cable and wide optical fiber lasers are mixed,
It is filtered in linear resonant cavity using acousto-optic modulation and multiple-mode interfence, realizes that the tunable ability of spectrum is more than 12nm, scope from
1038~1050nm.In addition, the power stability of narrow-linewidth laser light source also directly affects the sensitivity of optical fiber gas sensing.Knot
Close fiber Bragg grating F-P etalon, FBG and highly doped erbium-doped fiber, 2 it is small when inner light source fluctuation to be less than 0.5%, 3dB line widths small
It is obtained in 0.01nm.One separate type based on two fiber Bragg grating filters of matching is tunable and output-power fluctuation
Optical fiber ring laser less than 0.1dB.
Although existing laser can realize that laser exports, the tunable ability of optical maser wavelength is poor, and light source is not
Stablize.
The content of the invention
The technical problems to be solved by the invention are that providing one kind mixes bait Photonic Crystal Fiber Lasers, it is intended to solve existing
The problem of tunable ability of the wavelength of the laser of some laser output is poor, and flashing is determined.
The present invention is achieved in that one kind mixes bait Photonic Crystal Fiber Lasers, including wavelength division multiplexer, mixes bait single mode
Photonic crystal fiber, the first Polarization Controller, polarization-dependent isolator, the second Polarization Controller, coupler, wave filter and pumping
Laser, the wavelength division multiplexer, described mix bait single mould photon crystal optical fiber, first Polarization Controller, the polarization phase
Isolator, second Polarization Controller, the coupler is closed to connect to form annular chamber by optical fiber with the wave filter, it is described
The external pump laser of wavelength division multiplexer；
The pumping device, for producing pump light；
The wavelength division multiplexer, for the pump light to be introduced the annular chamber；It is additionally operable to the different multi beam of wavelength
Optical signal synthesizes a branch of optical signal, and the optical signal transmission that conjunction beam obtains is mixed bait single mould photon crystal optical fiber to described；
It is described to mix bait single mould photon crystal optical fiber, under the radiation of the pump light, exporting exciting light；
First Polarization Controller, the polarization-dependent isolator and second Polarization Controller, for described
Exciting light carries out polarization state adjusting, obtains polarised light；
The coupler, for being split according to preset proportion to the polarised light, obtains output light and concussion light, and
The output light output is detected, gives the concussion optical transport to the wave filter；
The wave filter, for carrying out wavelength regulation, tuning and filtering process respectively to the concussion light, after processing
Concussion optical transport gives the wavelength division multiplexer.
Further, the pumping device is 980nm semiconductor lasers.
Further, first Polarization Controller is 3 ring Polarization Controllers.
Further, second Polarization Controller is 3 ring Polarization Controllers.
Further, the output light and the ratio of the concussion light are 10:90.
Further, centered on the wave filter tunable wave length scope from 1525~1570nm, 1~18nm of three dB bandwidth
Continuously adjustable polarization is without related tunable optic filter.
Compared with prior art, the present invention beneficial effect is：It is provided in an embodiment of the present invention to mix bait photonic crystal fiber
Laser includes wavelength division multiplexer, mixes bait single mould photon crystal optical fiber, the first Polarization Controller, polarization-dependent isolator, second
Polarization Controller, coupler, wave filter and pump laser, mix bait single mode photon crystalline substance by using with strong nonlinearity effect
Body optical fiber replaces the traditionally combination using erbium-doped fiber and strong nonlinearity optical fiber as gain media, is revolved based on nonlinear polarization
Turning effect realizes stable Single wavelength output.2 Polarization Controls are added on the basis of traditional tunable filtering structure
Device weakens gain broadening effect, and bait Photonic Crystal Fiber Lasers provided in an embodiment of the present invention of mixing not only improve optical maser wavelength
Tunable ability, and improve the stability of light source.
Brief description of the drawings
Fig. 1 is a kind of structure diagram for mixing bait Photonic Crystal Fiber Lasers provided in an embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 shows that one kind provided in an embodiment of the present invention mixes bait Photonic Crystal Fiber Lasers, including wavelength division multiplexer
WDW, mix bait single mould photon crystal optical fiber ED-PCF, be the first Polarization Controller PC1, polarization-dependent isolator PD-ISO, second inclined
Shake controller PC2, coupler Coupler, wave filter TF and pump laser Pump, and wavelength division multiplexer WDW, mix bait single mode photon
Crystal optical fibre ED-PCF, the first Polarization Controller PC1, polarization-dependent isolator PD-ISO, the second Polarization Controller PC2, coupling
Device Coupler connects to form annular chamber with wave filter TF by optical fiber, the external pump laser Pump of wavelength division multiplexer WDW；
Pumping device Pump, for producing pump light；Wavelength division multiplexer WDW, for the pump light to be introduced the annular
Chamber；It is additionally operable to the different multi beam optical signal of wavelength synthesizing a branch of optical signal, and optical signal transmission that beam obtains will be closed to mixing bait
Single mould photon crystal optical fiber ED-PCF；Bait single mould photon crystal optical fiber ED-PCF is mixed, it is defeated under the radiation of the pump light
Go out exciting light；First Polarization Controller PC1, polarization-dependent isolator PD-ISO and the second Polarization Controller PC2, for described
Exciting light carries out polarization state adjusting, obtains polarised light；Coupler Coupler, for according to preset proportion to the polarised light into
Row beam splitting, obtains output light and concussion light, and the output light output is detected, by the concussion optical transport to wave filter
TF；Wave filter TF, for carrying out wavelength regulation, tuning and filtering process respectively to the concussion light, by the concussion light after processing
It is transferred to wavelength division multiplexer WDW.
The embodiment of the present invention is based on nonlinear polarization rotation (NPR, Nonlinear Polarization
Rotation an all -fiber) is constructed, wide adjusting, Single wavelength, narrow linewidth mix bait Photonic Crystal Fiber Lasers ED-PCFL
(Erbium-Doped Photonic Crystal Fiber Laser).It is appropriate to change after adding two Polarization Controllers
The light of any input polarization, is converted to set any output polarization state light, passed through by the rotation angle of Polarization Controller
Change polarization state and meet phase-matching condition, stable output could be realized by only meeting the laser of phase matched.Thus, generation
The stability of laser and tunable ability are greatly improved.
ED-PCFL provided in an embodiment of the present invention is as shown in Figure 1.The ED-PCFL mixes bait photonic crystal fiber by 10m's long
ED-PCF (Erbium-Doped Photonic Crystal Fiber) is used as gain media, 1 980nm semiconductor laser
Pumping device is made, 1 centre wavelength tunable range is unrelated from 1525~1570nm, polarization continuously adjustable 1~18nm of three dB bandwidth
Tunable optic filter TF (Tunable Filter), 1 90:10 coupler Coupler, 1 polarization-dependent isolator PD-
ISO and 2 Polarization Controller PC composition.PD-ISO is combined with PC not to be used only for producing Polarization Dependent Loss, and available
In the unidirectional vibration for ensureing laser, force and mix bait Photonic Crystal Fiber Lasers and run with traveling-wave mode, to avoid gain hole burning
The influence of effect.Coupler Coupler is 0.02nm with minimum resolution using 10% as output light, measurement range from 600~
The spectrometer measurement output spectrum of 1700nm, the first Polarization Controller PC1 and the second Polarization Controller PC2 in the present embodiment are equal
Using 3 ring Polarization Controllers.
In the embodiment of the present invention, pass through：
1st, using the unrelated tunable optic filter TF of polarization, polarization-dependent isolator PD-ISO and two Polarization Controllers
PC, can obtain more preferable output performance.Specifically, cooperated by the function of each device and realize that stable wavelength is defeated
Go out.Unrelated tunable optic filter TF is polarized to act on broad tuning, the combination of PD-ISO and PC play small range adjustment effect, if
The Polarization Dependent Loss for polarizing the output wavelength of unrelated tunable optic filter TF and the combination generation of PD-ISO and PC mismatches, i.e.,
Polarize unrelated tunable optic filter TF outgoing wavelength and be unsatisfactory for phase matched adjusting, can not also realize stable laser output.This
When, the stabilizations of unrelated tunable optic filter TF output wavelengths can be polarized to realize by the angle of appropriate rotatory polarization controller PC
Output.PD-ISO combines the unidirectional vibration that can be used to ensure that laser with PC, forces and mixes bait Photonic Crystal Fiber Lasers ED-PCFL
Run with traveling-wave mode, to avoid the influence of gain hole-burning effect.
2nd, narrower line width is not only obtained using two Polarization Controller PC, but also light source maximum output can be made
More stablize.Wherein, the change of polarization state passes through the angle, θ of each crank in rotatory polarization controller PC1, θ2And θ3, based on non-
Linear polarization rotation causes with polarizing relevant loss to realize that stable tunable laser exports.What is used in the present embodiment is inclined
The control principle of controller PC of shaking is：Arbitrary input polarization light is changed into linearly polarized light by first quarter-wave plate, and two
This linearly polarized light is gone to any desired polarization direction by/mono- wave plate, and final second quarter-wave plate again should
Polarised light is transformed into any output polarization state intentionally got.In the present embodiment, the polarizations of the first Polarization Controller PC1 and second
The effect of controller PC2 is of equal value, is in order to which output wavelength can be allow to adjust thinner using 2 Polarization Controllers
Cause.
3rd, the gain ranging of gain media is chosen without related tunable optic filter TF using polarization, only when output wavelength is in TF
Filter range within and the less laser of polarization loss could obtain stable output.In other words, TF plays broad tuning,
And PC then can be achieved to fine-tune output wavelength.Thus, the present embodiment can obtain shorter tunable stepping wavelength, lead to
Cross the appropriate TF and PC that adjusts and realize required target output wavelength.Specifically, the gain ranging of gain media is wider, can reach
100nm or so, by only having part wavelength to export after TF.By the filter range of manual adjustment TF, only work as gain media
Gain ranging when meeting the filter range of TF, corresponding spectrum could realize stable output.The polarization stated in the present embodiment
Smaller loss is compared with other output wavelengths, it can realize its polarization state of the optical maser wavelength of output and PD-ISO
Polarization direction is consistent.PD-ISO only allows a certain specific polarization state wavelength by if the polarization state and PD-ISO of certain wavelength
Permitted polarization direction is perpendicular, then the wavelength can be completely blocked and lose, and if it is permitted partially with PD-ISO
The direction that shakes is less than 90 degree of angle into one, then partition losses；If parallel, then pass through completely.It is constant in the filter range of TF
In the case of, the angle of appropriate 3 ring Polarization Controller of change, you can realize that the small range of output wavelength is adjusted.
The itd is proposed key component for mixing bait Photonic Crystal Fiber Lasers ED-PCFL provided in an embodiment of the present invention is two
A Polarization Controller PC, in order to compensate for because the chamber damage that 2 Polarization Controllers of increase are brought, the pump power of pumping device is increased
To 81.14mW, which is less than modelocking threshold power, and the 3dB line widths of spectrum are 0.02nm, and stability is greatly improved,
And since PD-ISO and PC combines the nonlinear polarization rotation produced, it is suppressed that significant moding and mode competition.
PD-ISO and any 1 PC can produce nonlinear polarization rotation, and the present embodiment adds 2 PC and finer can change
The polarization direction of light, and then realize fine-tuning for wavelength.
There is the characteristic for effectively suppressing erbium ion own gain broadening at room temperature due to mixing bait single mould photon crystal optical fiber,
After 2 PC are added in annular chamber, not only spectrum narrows, and the stability of light source is also greatly improved.
The embodiment of the present invention realizes the tuning of wavelength by adjusting the centre wavelength of TF and the anglec of rotation of PC.Tunable wave length
Scope covers C-band, and scope is from 1525.66~1566.34nm, span about 40nm.Based on 08 database simulations of HITRAN
Shown in acetylene absorption line strength, it can be seen that the tunable wave length scope of ED-PCFL covers acetylene P branch Absorption Lines.Then, lead to
Overregulate TF and PC controls output wavelength and remove matching acetylene from the absworption peak between 1528.014~1535.396nm.ED-PCFL
Output wavelength absorbs peak deviation with acetylene gas and is less than 0.02nm, and can be very good to solve light source output wavelength is difficult that high accuracy is right
The problem of quasi- gas absworption peak.In the present embodiment, two PC can be adjusted, and as which is adjusted, how much adjusts angle, be depended on
In required target output wavelength.
Stabilized lasers of the tunable wave length stepping length that the embodiment of the present invention can obtain less than 0.5nm export, than existing
Have and use the tunable wave length stepping length of tunable FBG realizations shorter in technology.This fully demonstrates the embodiment of the present invention should
Used in laser gas sensing and the potentiality of sensory field of optic fibre.It is provided in an embodiment of the present invention to mix bait Photonic Crystal Fiber Lasers
The tunable wave length ability of ED-PCFL is strong, and the stability of output spectrum is also greatly improved when comparing no PC, can with it come
Do the light source of gas sensing.
In embodiments of the present invention, wavelength division multiplexer WDM is a branch of by the different optical signal synthesis of wavelength, along simple optical fiber
Transmission, it introduces the light in pumping device Pump in annular chamber, and pump light is by mix bait single mould photon crystal optical fiber ED-PCF
As gain media when absorbed, erbium ion in ED-PCF forms population inversion, finally produced in the ED-PCF by
Swash radiation and export laser, by pumping laser wavelength convert into rare-earth-ion-doped excitation wavelength.The work of 2 Polarization Controller PC
With being all identical, all by adjusting its anglec of rotation, realize that polarization state is adjusted, and then obtain desired output wavelength.PD-ISO
For polarization-dependent isolator, it is equivalent to the combination of polarizer and isolator, and the loss to different polarization state light is different.By
By experienced different phase shifts during Polarization Controller PC, its polarization state changes the linearly polarized light of different wave length after PD-ISO
Difference, forms the elliptically polarized light of different polarization states.The difference of polarization state is transformed into the difference of loss by PD-SIO, that is,
Say, adjustings of the Polarization Controller PC to different wave length polarization state is equivalent to the adjusting to its cavity loss, so as to fulfill wavelength
Tunable output.The effect of coupler Coupler is light splitting effect, its coupling ratio is 90:10,10% is used as output terminal, i.e.,
10% light output is used to detect, and 90% light, which is left in annular chamber, to be continued to shake, and improves optical cavity fineness, realizes stabilized lasers
Output.The centre wavelength tunable range of unrelated tunable optic filter TF is polarized from 1525~1570nm, 3dB tunable bandwidths from
1~18nm is continuously adjustable.TF effects mainly control tunable range, tuning and the filter action of optical maser wavelength, its is tunable
Step-length about 1nm.After adding two Polarization Controller PC, the output wavelength tuning step-length for mixing bait Photonic Crystal Fiber Lasers is reachable
0.02nm, output wavelength can be aligned completely with gas absworption peak.If output wavelength and the wavelength phase corresponding to gas absworption peak
Every 0.03nm, then its absorption intensity may decay half, and the absorption intensity corresponding to light source output wavelength is stronger, and light source is to gas
The detectivity of body is stronger.Specifically, by appropriate adjusting TF and PC, obtain output center wavelength and be located at 1550.044nm
The stabilization Single wavelength output at place.When pump power reaches 600mW, signal-to-noise ratio reaches maximum 63dB, this high signal-to-noise ratio
Show, which has fabulous mode selection capability, this is very beneficial for gas sensing.Thus, the embodiment of the present invention carries
The ED-PCFL of confession has very strong practicality.
It is provided in an embodiment of the present invention to mix bait Photonic Crystal Fiber Lasers ED-PCFL tables in the test process of 30min
Good stability is revealed, maximum wavelength drift only 8pm, peak power standard deviation is about 0.03dB.System ratio is higher than 63dB,
3dB line widths are 0.02nm, have exceeded the stabilization Single wavelength vibration of the tunable wave length scope of 40nm.Wavelength can be aligned with high precision
Object gas absworption peak, realizes that stabilized lasers of the wavelength stepping length less than 0.5nm export, this shows the laser in laser gas
Body senses and sensory field of optic fibre has very big application potential.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (6)
1. one kind mixes bait Photonic Crystal Fiber Lasers, it is characterised in that including wavelength division multiplexer, mixes bait single-mode photon crystal light
Fibre, the first Polarization Controller, polarization-dependent isolator, the second Polarization Controller, coupler, wave filter and pump laser, institute
State wavelength division multiplexer, it is described mix bait single mould photon crystal optical fiber, first Polarization Controller, the polarization-dependent isolator,
Second Polarization Controller, the coupler connect to form annular chamber with the wave filter by optical fiber, the wavelength-division multiplex
The external pump laser of device；
The pumping device, for producing pump light；
The wavelength division multiplexer, for the pump light to be introduced the annular chamber；It is additionally operable to believe the different multi-beam of wavelength
Number a branch of optical signal of synthesis, and by the optical signal transmission that beam obtains is closed bait single mould photon crystal optical fiber is mixed to described；
It is described to mix bait single mould photon crystal optical fiber, under the radiation of the pump light, exporting exciting light；
First Polarization Controller, the polarization-dependent isolator and second Polarization Controller, for the excitation
Light carries out polarization state adjusting, obtains polarised light；
The coupler, for being split according to preset proportion to the polarised light, obtains output light and concussion light, and by institute
State output light output to be detected, give the concussion optical transport to the wave filter；
The wave filter, for carrying out wavelength regulation, tuning and filtering process respectively to the concussion light, by the concussion after processing
Optical transport gives the wavelength division multiplexer.
2. mix bait Photonic Crystal Fiber Lasers as claimed in claim 1, it is characterised in that the pumping device is 980nm half
Conductor laser.
3. mix bait Photonic Crystal Fiber Lasers as claimed in claim 1, it is characterised in that first Polarization Controller is
3 ring Polarization Controllers.
4. mix bait Photonic Crystal Fiber Lasers as claimed in claim 1, it is characterised in that second Polarization Controller is
3 ring Polarization Controllers.
5. mix bait Photonic Crystal Fiber Lasers as claimed in claim 1, it is characterised in that the output light and the concussion
The ratio of light is 10:90.
6. mix bait Photonic Crystal Fiber Lasers as claimed in claim 1, it is characterised in that wavelength centered on the wave filter
1525~1570nm of tunable range, polarization continuously adjustable 1~18nm of three dB bandwidth is without related tunable optic filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810035663.5A CN107968312B (en) | 2018-01-15 | 2018-01-15 | Erbium-doped photonic crystal fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810035663.5A CN107968312B (en) | 2018-01-15 | 2018-01-15 | Erbium-doped photonic crystal fiber laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107968312A true CN107968312A (en) | 2018-04-27 |
| CN107968312B CN107968312B (en) | 2023-12-05 |
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| CN113097844A (en) * | 2021-04-02 | 2021-07-09 | 电子科技大学 | Single frequency Q-switching laser |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202906186U (en) * | 2012-07-26 | 2013-04-24 | 深圳大学 | Multi-wavelength erbium-doped photonic crystal fiber laser |
| CN203551924U (en) * | 2013-10-18 | 2014-04-16 | 深圳大学 | Erbium-doped photonic crystal fiber amplifier |
| CN104283096A (en) * | 2014-10-21 | 2015-01-14 | 天津理工大学 | Multi-wavelength Er-doped optical fiber laser device with wavelength interval continuously adjustable |
| CN205377007U (en) * | 2015-12-27 | 2016-07-06 | 厦门彼格科技有限公司 | Erbium doped fiber amplifier of high -efficient pumping |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202906186U (en) * | 2012-07-26 | 2013-04-24 | 深圳大学 | Multi-wavelength erbium-doped photonic crystal fiber laser |
| CN203551924U (en) * | 2013-10-18 | 2014-04-16 | 深圳大学 | Erbium-doped photonic crystal fiber amplifier |
| CN104283096A (en) * | 2014-10-21 | 2015-01-14 | 天津理工大学 | Multi-wavelength Er-doped optical fiber laser device with wavelength interval continuously adjustable |
| CN205377007U (en) * | 2015-12-27 | 2016-07-06 | 厦门彼格科技有限公司 | Erbium doped fiber amplifier of high -efficient pumping |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113097844A (en) * | 2021-04-02 | 2021-07-09 | 电子科技大学 | Single frequency Q-switching laser |
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