CN106992427A - Light-operated hyperfrequency passive mode-locking fiber laser - Google Patents
Light-operated hyperfrequency passive mode-locking fiber laser Download PDFInfo
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- CN106992427A CN106992427A CN201710348090.7A CN201710348090A CN106992427A CN 106992427 A CN106992427 A CN 106992427A CN 201710348090 A CN201710348090 A CN 201710348090A CN 106992427 A CN106992427 A CN 106992427A
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- laser
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Classifications
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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
- H01S3/1118—Semiconductor saturable absorbers, e.g. semiconductor saturable absorber mirrors [SESAMs]; Solid-state saturable absorbers, e.g. carbon nanotube [CNT] based
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10061—Polarization control
Abstract
The present invention provides a kind of light-operated hyperfrequency passive mode-locking fiber laser, including first laser device, second laser, wavelength division multiplexer, the first coupler and saturable absorber, wherein first laser device connects the input of the first coupler by wavelength division multiplexer, first output end of the first coupler connects wavelength division multiplexer by saturable absorber, and saturable absorber is made by wrapping up graphene film on evanscent field optical fiber；The laser that first laser device is exported passes sequentially through wavelength division multiplexer, the first coupler transfer to saturable absorber, second laser exports Laser Transmission direction in opposite direction along with first laser device, laser is supplied to saturable absorber, it is adjusted by the frequency that laser is exported to first laser device and/or second laser, the frequency to the laser signal of the second output end output of the first coupler is adjusted.By the invention it is possible to improve tuning precision and stability, expand tuning range and shorten the response time.
Description
Technical field
The invention belongs to field of lasers, and in particular to a kind of light-operated hyperfrequency passive mode-locking fiber laser.
Background technology
The hyperfrequency optical fiber laser of frequency-adjustable has the advantages that simple in construction, thermal diffusivity is good, efficiency high, in intensive ripple
The fields such as multiplexing, Fibre Optical Sensor multiplexing, THz source, laser radar microwave source are divided to have important application.Existing frequency tuning
Means are broadly divided into following several ways：By mechanical device manually or with the filter in mechanical step-by-step system tuning laser chamber
Wave device is tuned with reaching to the frequency of the mode locking pulse of output；Pass through electric field controls saturable absorber modulation depth pair
Frequency is tuned.The humorous mode of machinery is relatively low due to mechanical step-by-step system precision, the complicated limitation of mechanical device, causes modulation essence
Degree and modulation repeatability is not high, and the response time is longer.Joule heat is released during Electric Field Modulated saturable absorber causes saturable to inhale
The fire damage threshold value of acceptor is greatly reduced, and modulation voltage can only be controlled in small range, and electric field tunes circuit driven and rung
It should influence, its optical modulating device bandwidth of operation tuned is limited.As can be seen here, current frequency tuning precision is relatively low, steady
Qualitative poor, scope is narrower and the response time is longer.
The content of the invention
The present invention proposes a kind of light-operated hyperfrequency passive mode-locking fiber laser, exists to solve current frequency tuning mode
Tuning precision is relatively low, less stable, narrower scope and the problem of the longer response time.
First aspect according to embodiments of the present invention there is provided a kind of light-operated hyperfrequency passive mode-locking fiber laser, including
First laser device, second laser, wavelength division multiplexer, the first coupler and saturable absorber, wherein the first laser device
Output end connect the first input end of the wavelength division multiplexer, output end connection first coupling of the wavelength division multiplexer
The input of device, the first output end of first coupler connects the wavelength division multiplexer by the saturable absorber
Second input, the saturable absorber is made by wrapping up graphene film on evanscent field optical fiber；
The laser that the first laser device is exported passes sequentially through the wavelength division multiplexer, the first coupler transfer can to described in
Saturated absorbing body, the second laser exports Laser Transmission direction in opposite direction along with the first laser device, will swash
Light is supplied to the saturable absorber, is entered by the frequency that laser is exported to the first laser device and/or second laser
Row adjustment, the frequency to the laser signal of the second output end output of first coupler is adjusted.
In a kind of optional implementation, the frequency of the laser signal of the second output end output of first coupler
The linear superposition of laser frequency is exported for the first laser device and second laser.
In another optional implementation, the first laser device and/or second laser export the frequency of laser
Bigger, the frequency of the laser signal of the second output end output of first coupler is bigger.
In another optional implementation, in addition to the first isolator and the second coupler, first isolator
It is arranged between the first output end of first coupler and the saturable absorber, the second laser passes through described
The laser that second coupler is output it is supplied to the saturable absorber.
In another optional implementation, in addition to circulator and Bragg grating, the of first coupler
One output end connects the first end of the circulator, and the second end of the circulator passes sequentially through the saturable absorber, cloth
Glug grating is connected with the output end of the second laser, the second input of wavelength division multiplexer described in three-terminal link.
In another optional implementation, in addition to it is arranged on the output end and described first of the wavelength division multiplexer
The second isolator between the input of coupler.
In another optional implementation, in addition to it is arranged on the output end and described first of the wavelength division multiplexer
Doped gain fiber between the input of coupler.
In another optional implementation, in addition to it is arranged on the output end and described first of the wavelength division multiplexer
Polarization Controller between the input of coupler.
In another optional implementation, the evanscent field optical fiber includes the tapered fiber or bag that there is light spilling
Single-mode fiber of the layer after processing.
In another optional implementation, the manufacturing process of single-mode fiber of the covering after processing is：To list
The covering of mode fiber is corroded and the side of the single-mode fiber after corrosion is made into D types, and presets D type plan ranges fibre core
Value.
The beneficial effects of the invention are as follows：
1st, saturable absorber is made by using the evanscent field optical fiber for being enclosed with graphene in the present invention, utilizes light-operated graphite
Alkene causes the saturated absorption of evanscent field optical fiber to change this characteristic, to being supplied to the frequency of laser of saturable absorber big
It is small to be adjusted, it is possible to achieve the output of tunable laser, using this frequency-adjustable mode can improve tuning precision and
Stability, expands tuning range and shortens the response time；
2nd, the present invention carries out gain amplification to the laser that wavelength division multiplexer is exported, set by setting doped gain fiber
Polarization Controller can carry out Polarization Control with laser, set isolator to isolate Laser Transmission, may further ensure that defeated
Go out the stability of laser；
3rd, then the present invention single-mode fiber side after corrosion is made by carrying out covering corrosion to single-mode fiber first
D types, can overflow more optical signals so that optical signal and field control signal repercussion effect are more obvious, while also not
Can be because interaction excessively substantially causes wavelength interval degree of regulation too low, you can to ensure wavelength interval regulations speed
While ensure wavelength interval degree of regulation.
Brief description of the drawings
Fig. 1 is one embodiment structural representation of light-operated hyperfrequency passive mode-locking fiber laser of the invention.
Fig. 2 is one embodiment diagrammatic cross-section of saturable absorber of the present invention；
Fig. 3 is another example structure schematic diagram of light-operated hyperfrequency passive mode-locking fiber laser of the invention；
Fig. 4 is another example structure schematic diagram of light-operated hyperfrequency passive mode-locking fiber laser of the invention.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the embodiment of the present invention, and make of the invention real
Applying the above-mentioned purpose of example, feature and advantage can be more obvious understandable, below in conjunction with the accompanying drawings to technical side in the embodiment of the present invention
Case is described in further detail.
In the description of the invention, unless otherwise prescribed with restriction, it is necessary to which explanation, term " connection " should do broad sense reason
Solution, for example, it may be mechanically connecting or electrical connection or the connection of two element internals, can be joined directly together, also may be used
To be indirectly connected to by intermediary, for the ordinary skill in the art, it can understand above-mentioned as the case may be
The concrete meaning of term.
It is one embodiment structural representation of light-operated hyperfrequency passive mode-locking fiber laser of the invention referring to Fig. 1.Should
Light-operated hyperfrequency passive mode-locking fiber laser can include first laser device 5, second laser 3, wavelength division multiplexer 6, first
Coupler 9 and saturable absorber 1, wherein the first of the output end connection wavelength division multiplexer 6 of the first laser device 5 is defeated
Enter end, the output end of the wavelength division multiplexer 6 connects the input of first coupler 9, the first of first coupler 9
Output end connects the second input of the wavelength division multiplexer 6, the saturable absorber 1 by the saturable absorber 1
It is made by wrapping up graphene film 1-2 on evanscent field optical fiber 1-1, as shown in Figure 2.Wherein, the first laser device 5 is exported
Laser pass sequentially through the wavelength division multiplexer 6, the first coupler 9 and be transferred to the saturable absorber 1, the second laser
Device 3 exports Laser Transmission direction in opposite direction along with the first laser device 5, and laser is supplied into the saturable absorption
Body 1, is adjusted by the frequency of the laser exported to the first laser device 5 and/or second laser 3, to described first
The frequency of the laser signal of the second output end output of coupler 9 is adjusted.
In the present embodiment, can be including there is the list of the tapered fiber or covering of light spilling after processing in evanscent field optical fiber
Mode fiber.Wherein, the manufacturing process of single-mode fiber of the covering after processing is：The covering of single-mode fiber is corroded and by corruption
The side of single-mode fiber after erosion is made D types, and makes D type plan range fibre core preset values, wherein by the surrounding layer of single-mode fiber
Diameter corrodes to 12 to 18 microns, and the preset value is any one value in 6 to 9 micrometer ranges.The present invention passes through head
Covering corrosion first is carried out to single-mode fiber, D types then are made in the single-mode fiber side after corrosion, more optical signals can be made
Overflow so that optical signal and field control signal repercussion effect are more obvious, while also will not be excessively obvious because of interacting
And cause wavelength interval degree of regulation too low, you can to ensure the tune of wavelength interval while wavelength interval regulations speed is ensured
Save precision.In addition, tapered fiber can carry out drawing cone to be made to single-mode fiber.It should be noted that：Saturable in the present embodiment
Absorber can use graphene, CNT, quantum dot or topological insulator, and first laser device can swash for 980nm pumpings
Light device, the first output end of first coupler and the splitting ratio of the second output end are 9:1, graphene in saturable absorber
The length of the evanscent field single-mode fiber wrapped up is 3 to 6 millimeters.
The present invention operation principle be：When laser is transferred to saturable absorber 1, overflow from the fibre core of evanscent field optical fiber
The optical signal gone out can interact with the graphene film being wrapped on evanscent field optical fiber.Because graphene has zero band gap knot
Electronics in structure, therefore graphene valence band is easy to absorptive pumping photon transition to conduction band, and meets dirac distribution, this
The electronics for causing graphene band structure is distributed by process to change.When the laser that change is transferred to saturable absorber 1 is strong
When spending, the distribution of graphene Energy band electron also will be different.Thus, when laser is transferred to evanscent field optical fiber, evanscent field light
The optical signal that fibre overflows interacts with the graphene film being wrapped in thereon, can cause other light based on Pauli's exclusion principle
Absorption weaken, so as to cause the saturated absorption of evanscent field optical fiber to change.
After Laser Transmission to the first coupler 9 that first laser device 5 is output it by wavelength division multiplexer, fraction laser
Transferred out from the second output end of the first coupler 9, most of laser is transferred to saturable absorber 1, and then is transmitted back to
Wavelength division multiplexer carries out circle transmission, and saturable absorber 1, which is based on Pauli's exclusion principle, during circle transmission causes it
The absorption of his light weakens.Similarly, second laser 3 to saturable absorber 1 after laser is provided, the base of saturable absorber 1
In Pauli be not desired to hold principle also lead to other light absorption weaken, finally make saturable absorber 1 absorb laser frequency with
First laser device 5 is relevant with the laser frequency that second laser 3 is exported.Through applicants have found that, first coupler 9
The frequency of second output end output laser signal is that the first laser device 5 and second laser 3 export the linear of laser frequency
The frequency of superposition, first laser device and/or second laser output laser is bigger, the second output end output of the first coupler
The frequency of laser signal is bigger.Thus, the present invention to the laser frequency that first laser device and/or second laser are exported by entering
Row adjustment, can carry out light-operated regulation to the saturation frequency of saturable absorber, so that the regulation of output laser frequency is realized, its
The frequency of middle output laser and the frequency of first laser device and second laser output laser are linear.
Due to the stable output in the second end very fast in optical transport speed, exporting laser to coupler 9 from first laser device 5
The time that laser is spent is very short, therefore the tuning response time in the present invention is shorter, and the regulation of saturable absorber
Light-operated regulation, different from electric field tuning, it is not driven by it the influence of circuit, thus tuning precision is higher, tuning range compared with
It is wide.In addition, the laser frequency that exports of the present invention is only with the performance of saturable absorber itself and being supplied to saturable absorber
Laser frequency it is relevant, and both are once it is determined that smaller by ectocine, thus stability is more preferable.
As seen from the above-described embodiment, saturable absorption is made by using the evanscent field optical fiber for being enclosed with graphene in the present invention
Body, and cause the saturated absorption of evanscent field optical fiber to change this characteristic using light-operated graphene, to being supplied to saturable to inhale
The frequency size of the laser of acceptor is adjusted, it is possible to achieve the output of tunable laser, using this frequency-adjustable mode
Tuning precision and stability can be improved, expands tuning range and shortens the response time.
It is another example structure schematic diagram of light-operated hyperfrequency passive mode-locking fiber laser of the invention referring to Fig. 3.
Fig. 3 and light-operated hyperfrequency passive mode-locking fiber laser shown in Fig. 1 difference are, in addition to the first isolator 2 and the second coupling
Clutch 10, first isolator 2 be arranged on the first output end of first coupler 9 and the saturable absorber 1 it
Between, the laser that second laser 3 is output it by second coupler 10 is supplied to the saturable absorber 2.This reality
Apply in example, the present invention by setting the first isolator, the Laser Transmission that can be exported in first laser device and second laser to
After saturable absorber, it is ensured that all laser can all be transmitted back to wavelength division multiplexer；, can be by second by setting the second coupler
The laser of laser output is supplied to saturable absorber.
In addition, Fig. 3 and light-operated hyperfrequency passive mode-locking fiber laser shown in Fig. 1 difference are also resided in, including it is arranged on
Doped gain fiber 7 and Polarization Control between the input of the output end of the wavelength division multiplexer 6 and first coupler 9
Device 8.In the present embodiment, the present invention can be increased by setting doped gain fiber to the laser exported from wavelength division multiplexer
Benefit amplification, by setting Polarization Controller to carry out Polarization Control to laser, so as to be further ensured that output laser
Stability.
As seen from the above-described embodiment, saturable absorption is made by using the evanscent field optical fiber for being enclosed with graphene in the present invention
Body, and cause the saturated absorption of evanscent field optical fiber to change this characteristic using light-operated graphene, to being supplied to saturable to inhale
The frequency size of the laser of acceptor is adjusted, it is possible to achieve the output of tunable laser, using this frequency-adjustable mode
Tuning precision and stability can be improved, expands tuning range and shortens the response time.
It is another example structure schematic diagram of light-operated hyperfrequency passive mode-locking fiber laser of the invention referring to Fig. 4.
Fig. 4 and light-operated hyperfrequency passive mode-locking fiber laser shown in Fig. 1 difference are, in addition to circulator 12 and Bragg grating
4, the first output end of first coupler 9 connects the first end of the circulator 12, the second end of the circulator 12 according to
It is secondary to be connected by the saturable absorber 1, Bragg grating 4 with the output end of the second laser 3, three-terminal link institute
State the second input of wavelength division multiplexer 6.In the present embodiment, the laser that first laser device 5 is exported is transmitted via the first coupler 9
After circulator 12, circulator 12 is by Laser Transmission to saturable absorber 1, and the laser that second laser 3 is exported passes through Bradley
Lattice grating 4 is transferred to saturable absorber 1.The laser that saturable absorber 1 is provided in first laser device 5 and second laser 3
In the presence of, its saturated absorption characteristic changes.Wherein, the characteristic of Bragg grating 4 itself determines that second laser 3 is provided
Laser can be with transmission to saturable absorber 1, but the Laser Transmission that provides of first laser device 5 is to saturable absorber 1
Afterwards, it will not be gone out from the transmission of Bragg grating 4, but saturable absorber 1 is returned by the transmission and reflection of Bragg grating 4.By
This, the present invention is by setting Bragg grating, it is ensured that first laser device and the laser of second laser output are being transferred to
After saturable absorber, it is ensured that all laser can all be transmitted back to wavelength division multiplexer.
In addition, Fig. 4 and light-operated hyperfrequency passive mode-locking fiber laser shown in Fig. 1 difference are also resided in, including it is arranged on
Doped gain fiber 7, Polarization Control between the input of the output end of the wavelength division multiplexer 6 and first coupler 9
The isolator 11 of device 8 and second.In the present embodiment, the present invention can be exported by setting doped gain fiber to wavelength division multiplexer
Laser carry out gain amplification, by set Polarization Controller can to laser carry out Polarization Control, so as to further guarantor
The stability of card output laser, by setting the second isolator, can isolate to the laser that first laser device is exported.
As seen from the above-described embodiment, saturable absorption is made by using the evanscent field optical fiber for being enclosed with graphene in the present invention
Body, and cause the saturated absorption of evanscent field optical fiber to change this characteristic using light-operated graphene, to being supplied to saturable to inhale
The frequency size of the laser of acceptor is adjusted, it is possible to achieve the output of tunable laser, using this frequency-adjustable mode
Tuning precision and stability can be improved, expands tuning range and shortens the response time.
Those skilled in the art will readily occur to its of the present invention after considering specification and putting into practice invention disclosed herein
Its embodiment.The application be intended to the present invention any modification, purposes or adaptations, these modifications, purposes or
Person's adaptations follow the general principle of the present invention and including undocumented common knowledge in the art of the invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the invention is not limited in the precision architecture for being described above and being shown in the drawings, and
And various modifications and changes can be being carried out without departing from the scope.The scope of the present invention is only limited by appended claim.
Claims (10)
1. a kind of light-operated hyperfrequency passive mode-locking fiber laser, it is characterised in that including first laser device, second laser,
Wavelength division multiplexer, the first coupler and saturable absorber, are answered wherein the output end of the first laser device connects the wavelength-division
With the first input end of device, the output end of the wavelength division multiplexer connects the input of first coupler, first coupling
First output end of clutch connects the second input of the wavelength division multiplexer, the saturable by the saturable absorber
Absorber is made by wrapping up graphene film on evanscent field optical fiber；
The laser that the first laser device is exported passes sequentially through the wavelength division multiplexer, the first coupler transfer to the saturable
Absorber, the second laser exports Laser Transmission direction in opposite direction along with the first laser device, and laser is carried
The saturable absorber is supplied, is adjusted by the frequency that laser is exported to the first laser device and/or second laser
Whole, the frequency to the laser signal of the second output end output of first coupler is adjusted.
2. light-operated hyperfrequency passive mode-locking fiber laser according to claim 1, it is characterised in that first coupling
The frequency of the laser signal of the second output end output of device is that the first laser device and second laser export laser frequency
Linear superposition.
3. light-operated hyperfrequency passive mode-locking fiber laser according to claim 1, it is characterised in that the first laser
The frequency of device and/or second laser output laser is bigger, the laser signal of the second output end output of first coupler
Frequency it is bigger.
4. light-operated hyperfrequency passive mode-locking fiber laser according to claim 1, it is characterised in that also including first every
From device and the second coupler, first isolator is arranged on the first output end of first coupler and the saturable is inhaled
Between acceptor, the laser that the second laser is output it by second coupler is supplied to the saturable absorption
Body.
5. light-operated hyperfrequency passive mode-locking fiber laser according to claim 1, it is characterised in that also including circulator
And Bragg grating, the first output end of first coupler connects the first end of the circulator, and the of the circulator
Two ends pass sequentially through the saturable absorber, Bragg grating and are connected with the output end of the second laser, and the 3rd end connects
Connect the second input of the wavelength division multiplexer.
6. light-operated hyperfrequency passive mode-locking fiber laser according to claim 5, it is characterised in that also including being arranged on
The second isolator between the input of the output end of the wavelength division multiplexer and first coupler.
7. light-operated hyperfrequency passive mode-locking fiber laser as claimed in any of claims 1 to 6, its feature exists
In, in addition to the doping gain light being arranged between the input of the output end of the wavelength division multiplexer and first coupler
It is fine.
8. light-operated hyperfrequency passive mode-locking fiber laser according to claim 7, it is characterised in that also including being arranged on
Polarization Controller between the input of the output end of the wavelength division multiplexer and first coupler.
9. light-operated hyperfrequency passive mode-locking fiber laser according to claim 1, it is characterised in that the evanscent field light
Including there is the single-mode fiber of the tapered fiber or covering of light spilling after processing in fibre.
10. light-operated hyperfrequency passive mode-locking fiber laser according to claim 9, it is characterised in that the covering warp
The manufacturing process of single-mode fiber after processing is：The covering of single-mode fiber is corroded and by the side of the single-mode fiber after corrosion
While D types are made, and make D type plan range fibre core preset values.
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| CN201710348090.7A CN106992427B (en) | 2017-05-17 | 2017-05-17 | Light-operated hyperfrequency passive mode-locking fiber laser |
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| CN201710348090.7A CN106992427B (en) | 2017-05-17 | 2017-05-17 | Light-operated hyperfrequency passive mode-locking fiber laser |
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| CN109742644A (en) * | 2019-03-11 | 2019-05-10 | 安徽天琢激光科技有限公司 | A kind of high power column vector optical fiber laser |
| CN109768460A (en) * | 2019-03-11 | 2019-05-17 | 安徽天琢激光科技有限公司 | A kind of single column arrow pattern output pulse optical fiber of ring cavity |
| CN109802285A (en) * | 2019-03-11 | 2019-05-24 | 安徽天琢激光科技有限公司 | A kind of single column arrow pattern output pulse optical fiber of Linear-Cavity |
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| CN106992427B (en) | 2019-06-04 |
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