CN106877121A - Pulse width tuning laser based on light-operated Graphene Chirp Bragg grating - Google Patents
Pulse width tuning laser based on light-operated Graphene Chirp Bragg grating Download PDFInfo
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- CN106877121A CN106877121A CN201710255294.6A CN201710255294A CN106877121A CN 106877121 A CN106877121 A CN 106877121A CN 201710255294 A CN201710255294 A CN 201710255294A CN 106877121 A CN106877121 A CN 106877121A
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- graphene
- laser
- bragg grating
- chirp bragg
- light
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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
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0057—Temporal shaping, e.g. pulse compression, frequency chirping
-
- 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
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
-
- 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
Abstract
The present invention provides a kind of pulse width tuning laser based on light-operated Graphene Chirp Bragg grating, wherein second laser is used to carry out light-operated regulation to the reflection bandwidth of Graphene Chirp Bragg grating, the laser of first laser device output is transferred to coupler by wavelength division multiplexer, fraction of laser light is transferred to Graphene Chirp Bragg grating by coupler by saturable absorber, Graphene Chirp Bragg grating will be transmitted back to wavelength division multiplexer with its reflection bandwidth identical laser reflection, transmission is circulated with to the laser that first laser device is exported, up to the second output end stabilization output pulse width and reflection bandwidth identical laser from coupler, during circle transmission, saturable absorber is filtered out and reflection bandwidth identical laser；Graphene Chirp Bragg grating is made of that the Chirp Bragg grating being corroded using covering superscribes Graphene.By the invention it is possible to improve tuning precision, stability and tuning range, and shorten the response time.
Description
Technical field
The invention belongs to field of lasers, and in particular to a kind of pulsewidth based on light-operated Graphene Chirp Bragg grating can
Adjusting laser.
Background technology
Pulse width tuning laser has the advantages that simple structure, thermal diffusivity be good, efficiency high, now fiber optic communication,
There is highly important effect in the fields such as Fibre Optical Sensor, laser cutting, biologic medical, nonlinear optics.Existing pulse width-tuned hand
Section is broadly divided into following several ways：By mechanical device manually or with the filtering in mechanical step-by-step system tuning laser chamber
Device is tuned with reaching the time domain pulsewidth of the mode locking pulse to exporting；By electric field controls saturable absorber modulation depth
Pulsewidth is tuned；In addition realized to pulsewidth by the modulation depth and loss of additional Laser Modulation saturable absorber
Tuning.But mechanical humorous mode is relatively low due to mechanical step-by-step system precision, the complicated limitation of mechanical device, cause modulation accuracy with
Modulation repeatability is not high, and the response time is more long.Joule heat is released during Electric Field Modulated saturable absorber and causes saturable absorber
Fire damage threshold value be greatly reduced, modulation voltage can only be controlled in small range, and electric field tuning is rung by its circuit driven
Should influence, the optical modulating device bandwidth of operation of its tuning is limited.As can be seen here, there is tuning in current pulse width-tuned mode
Precision is relatively low, less stable, the problem that scope is narrower and the response time is more long.
The content of the invention
The present invention provides a kind of pulse width tuning laser based on light-operated Graphene Bragg grating, to solve current pulsewidth
Tuning manner exist tuning precision is relatively low, less stable, the problem that scope is narrower and the response time is more long.
A kind of first aspect according to embodiments of the present invention, there is provided pulsewidth based on light-operated Graphene Chirp Bragg grating
Tunable laser, including first laser device, second laser, Graphene Chirp Bragg grating, wavelength division multiplexer, circulator,
Coupler and saturable absorber, wherein the output end of the first laser device connects the first input of the wavelength division multiplexer
End, the output end of the wavelength division multiplexer connects the input of the coupler, and the first output end of the coupler passes through institute
The first end that saturable absorber connects the circulator is stated, the second end of the circulator connects the Graphene chirp Bradley
The first end of lattice grating, the second input of wavelength division multiplexer described in three-terminal link, the output end of the second laser connects
Connect the second end of the Graphene Chirp Bragg grating；
The second laser is used to carry out light-operated regulation, institute to the reflection bandwidth of the Graphene Chirp Bragg grating
The laser for stating the output of first laser device is transferred to the coupler by the wavelength division multiplexer, and the coupler is by fraction of laser light
The Graphene Chirp Bragg grating is transferred to by the saturable absorber, the Graphene Chirp Bragg grating will
The wavelength division multiplexer is transmitted back to its reflection bandwidth identical laser reflection, is entered with to the laser that the first laser device is exported
Row circle transmission, until from the second output end stabilization output pulse width and the reflection bandwidth identical laser of the coupler,
During circle transmission, the saturable absorber is filtered out and the reflection bandwidth identical laser；The Graphene Zhou
Bragg grating of singing is made of that the Chirp Bragg grating being corroded using covering superscribes Graphene.
In a kind of optional implementation, the second laser is used for the watt level by changing output laser,
Light-operated regulation is carried out come the reflection bandwidth to the Graphene Chirp Bragg grating, wherein the power of output laser is bigger, is adjusted
The reflection bandwidth of the Graphene Chirp Bragg grating after section is wider.
In another optional implementation, also including being arranged between the wavelength division multiplexer and the coupler
Erbium-doped fiber.
In another optional implementation, also including being arranged between the wavelength division multiplexer and the coupler
Polarization Controller.
In another optional implementation, also including being arranged between the wavelength division multiplexer and the coupler
Isolator.
In another optional implementation, the chirp that Graphene is wrapped up in the Graphene Chirp Bragg grating
The length of Bragg grating is 3 to 6 millimeters.
The beneficial effects of the invention are as follows：
1st, the present invention superscribes Graphene and is made Graphene chirp by the Chirp Bragg grating using covering through corroding
Bragg grating, and the reflection bandwidth of Graphene Chirp Bragg grating is adjusted based on laser power size, can be with profit
Changed this characteristic with Graphene Chirp Bragg optical grating reflection bandwidth, the output of adjustable pulse width laser is realized, using this
Planting adjustable pulse width mode can improve tuning precision, stability and tuning range, and shorten the response time；
2nd, by setting erbium-doped fiber, the laser to wavelength division multiplexer output carries out gain amplification to the present invention, sets polarization
Controller can carry out Polarization Control with laser, set isolator and Laser Transmission is isolated, and may further ensure that output swashs
The stability of light；
3rd, the length of Chirp Bragg grating of the present invention by the way that Graphene in Graphene Chirp Bragg grating is wrapped up
It is 3 to 6 millimeters to spend, and on the premise of pulse-width regulated is realized, can not influence the response time.
Brief description of the drawings
Fig. 1 is that one embodiment structure of pulse width tuning laser of the present invention based on light-operated Graphene Bragg grating is shown
It is intended to；
Fig. 2 is one embodiment generalized section of Graphene Chirp Bragg grating of the present invention；
Fig. 3 is another example structure of pulse width tuning laser of the present invention based on light-operated Graphene Bragg grating
Schematic diagram.
Specific 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 illustrate, term " connection " should do broad sense reason
Solution, can be joined directly together for example, it may be mechanically connecting or electrical connection, or two connections of element internal, also may be used
It is indirectly connected to by intermediary, for the ordinary skill in the art, can as the case may be understands above-mentioned
The concrete meaning of term.
It is one embodiment of pulse width tuning laser of the present invention based on light-operated Graphene Bragg grating referring to Fig. 1
Structural representation.The pulse width tuning laser for being based on light-operated Graphene Bragg grating can include first laser device 4, second
Laser 6, Graphene Chirp Bragg grating 1, wavelength division multiplexer 3, circulator 5, coupler 9 and saturable absorber 10, its
Described in the output end of first laser device 4 connect the first input end of the wavelength division multiplexer 3, the wavelength division multiplexer 3 it is defeated
Go out the input of the end connection coupler 9, the first output end of the coupler 9 is connected by the saturable absorber 10
The first end of the circulator 5, the second end of the circulator 5 connects the first end of the Graphene Chirp Bragg grating 1,
Second input of wavelength division multiplexer 3 described in three-terminal link, the output end of the second laser 6 connects the Graphene Zhou
Sing the second end of Bragg grating 1.
The second laser 6 is used to carry out light-operated regulation to the reflection bandwidth of the Graphene Chirp Bragg grating 1,
The laser of the first laser device 4 output is transferred to the coupler 9 by the wavelength division multiplexer 3, and the coupler 9 is by portion
Shunt excitation light is transferred to the Graphene Chirp Bragg grating 1, the Graphene chirp cloth by the saturable absorber 10
Glug grating 1 will be transmitted back to the wavelength division multiplexer 3 with its reflection bandwidth identical laser reflection, with to the first laser device
The laser of 4 outputs is circulated transmission, up to the second output end stabilization output pulse width and the Graphene from the coupler 9
The reflection bandwidth identical laser of Chirp Bragg grating 1, during circle transmission, the saturable absorber 10 is filtered out
With the reflection bandwidth identical laser；Graphene Chirp Bragg grating 1 is the Chirp Bragg light being corroded using covering
Grid 1-2 superscribes Graphene 1-1 and is made, as shown in Figure 2.
In the present embodiment, after pumping optical transport to the Graphene Chirp Bragg grating of the output of second laser 6, from fibre
The light field meeting overflowed in core and the Graphene being wrapped on Chirp Bragg grating interact.Graphene has zero band gap
Structure, so the electronics in Graphene valence band is easy to absorptive pumping photon transition to conduction band, and meets dirac distribution,
The electronics distribution that this process can directly result in Graphene band structure changes.When pump light intensities are changed, Graphene
Energy band electron distribution it is also different.The reflection bandwidth of Chirp Bragg grating is determined by fiber core refractive index and period profile
's.Because the fibre core of Chirp Bragg grating is periodically modulated, the energy of the Graphene being wrapped in above fibre core is powered
The change of son distribution can further result in the change of the refraction index modulation of grating, so ultimately result in the bandwidth of optical grating reflection spectrum
Change.Therefore, the present invention can change the anti-of Chirp Bragg grating by changing the pumping light intensity of regulation and control Graphene
Penetrate bandwidth.Now when the signal laser of the output of first laser device 4 passes sequentially through wavelength division multiplexer 3, coupler 9, saturable absorption
Body 10 enters after Graphene Chirp Bragg grating 1, because reflection bandwidth changes, Graphene chirped fiber Bragg gratings 1
The longitudinal mode in its reflected waveband bandwidth, transmission and reflection echo division multiplexing device 3 will be selected from signal laser.By Graphene chirp
The laser of the transmission and reflection echo division multiplexing device 3 of Bragg grating 1 can be circulated transmission, during circle transmission, can
Saturated absorbing body 10 can screen the reflection bandwidth identical laser with Graphene Chirp Bragg grating 1, so as to ensure coupling
Second output end output pulse width of device 9 and the reflection bandwidth identical laser of Graphene Chirp Bragg grating 1.As can be seen here,
The present invention can export the watt level of laser by changing, and enter come the reflection bandwidth to the Graphene Chirp Bragg grating
The light-operated regulation of row, so that realize exporting the regulation of laser pulse width, wherein the power of output laser is bigger, the Graphene Zhou after regulation
Sing Bragg grating reflection bandwidth it is wider.
Due to very fast in optical transport speed, export laser from first laser device 4 and exported to the second end stabilization of coupler 9
Pulsewidth is very short with the time that the laser of Graphene Chirp Bragg grating 1 is spent, therefore during tuning response in the present invention
Between it is shorter, and the regulation of the reflection bandwidth of Graphene Chirp Bragg grating is light-operated regulation, and different from electric field tuning, it is not
It is driven by it the influence of circuit, therefore tuning precision is higher, tuning range is wider.In addition, the pulsewidth of the laser of present invention output
It is only relevant with the laser power that the performance and second laser of Graphene Chirp Bragg grating itself are exported, and both are once
It is determined that it is smaller by ectocine, thus stability is more preferable.
In addition, the manufacturing process of Graphene Bragg grating can be：
(1) by the Chirp Bragg grating of commercial C-band, (5 to 10 nanometers of reflection bandwidth, reflection kernel wavelength is received for 1550
Rice, reflectivity is more than 90%, 12 millimeters of grid region length) soak in a solution of hydrofluoric acid, to the covering of Chirp Bragg grating
Corroded, the diameter of grating is corroded to 12 to 18 microns.
(2) by commercial copper-based single-layer graphene using the method for chemical replacement by copper-based removal.
(3) copper-based single-layer graphene parcel will be removed to the Chirp Bragg grating after corrosion.
It should be noted that：Saturable absorber can use Graphene, CNT, quantum dot or open up in the present embodiment
Insulator is flutterred, first laser device and second laser can be 980nm pump lasers, and the first input end of wavelength division multiplexer is
980 nano waveband laser inputs, the second input is 1550 nano waveband laser inputs, the output end of the coupler first
It is 9 with the splitting ratio of the second output end:1, the Chirp Bragg grating that Graphene is wrapped up in Graphene Chirp Bragg grating
Length be 3 to 6 millimeters, thus on the premise of pulse-width regulated is realized, the response time can not be influenceed.
As seen from the above-described embodiment, the present invention superscribes Graphene by the Chirp Bragg grating using covering through corroding
Graphene Chirp Bragg grating is made, and the reflection bandwidth of Graphene Chirp Bragg grating is entered based on laser power size
Row regulation, it is possible to use Graphene Chirp Bragg optical grating reflection bandwidth changes this characteristic, realizes adjustable pulse width laser
Output, tuning precision, stability and tuning range can be improved using this adjustable pulse width mode, and shorten the response time.
It is another implementation of pulse width tuning laser of the present invention based on light-operated Graphene Bragg grating referring to Fig. 3
Example structural representation.The difference of the pulse width tuning laser based on light-operated Graphene Bragg grating shown in Fig. 3 and Fig. 2 is,
Also include the erbium-doped fiber 2, Polarization Controller 3 and the isolator 8 that are arranged between the wavelength division multiplexer and the coupler.
In the present embodiment, the output end of wavelength division multiplexer 3 passes sequentially through erbium-doped fiber 2, Polarization Controller 3 and isolator 8
Connect the input of coupler 9.Wherein, erbium-doped fiber 2 can carry out gain amplification to the laser of the output of wavelength division multiplexer 3, partially
Laser after the controller 3 that shakes can amplify to gain carries out Polarization Control, and isolator 8 can isolate to Laser Transmission, mix
The length of erbium optical fiber 2 is 1 meter.
As seen from the above-described embodiment, the present invention superscribes Graphene by the Chirp Bragg grating using covering through corroding
Graphene Chirp Bragg grating is made, and the reflection bandwidth of Graphene Chirp Bragg grating is entered based on laser power size
Row regulation, it is possible to use Graphene Chirp Bragg optical grating reflection bandwidth changes this characteristic, realizes adjustable pulse width laser
Output, tuning precision, stability and tuning range can be improved using this adjustable pulse width mode, and shorten the response time.
Those skilled in the art considering specification and after putting into practice invention disclosed herein, will readily occur to it is of the invention its
Its embodiment.The application is intended to any modification of the invention, purposes or adaptations, these modifications, purposes or
Person's adaptations follow general principle of the 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 being described above and be shown in the drawings, and
And can without departing from the scope carry out various modifications and changes.The scope of the present invention is only limited by appended claim.
Claims (6)
1. a kind of pulse width tuning laser based on light-operated Graphene Chirp Bragg grating, it is characterised in that swash including first
Light device, second laser, Graphene Chirp Bragg grating, wavelength division multiplexer, circulator, coupler and saturable absorber,
The output end of wherein described first laser device connects the first input end of the wavelength division multiplexer, the output of the wavelength division multiplexer
The input of the end connection coupler, the first output end of the coupler connects the ring by the saturable absorber
The first end of shape device, the second end of the circulator connects the first end of the Graphene Chirp Bragg grating, and the 3rd end connects
The second input of the wavelength division multiplexer is connect, the output end of the second laser connects the Graphene Chirp Bragg light
Second end of grid；
The second laser is used to carry out the reflection bandwidth of the Graphene Chirp Bragg grating light-operated regulation, and described the
The laser of one laser output is transferred to the coupler by the wavelength division multiplexer, and the coupler passes through fraction of laser light
The saturable absorber is transferred to the Graphene Chirp Bragg grating, and the Graphene Chirp Bragg grating will be with it
Reflection bandwidth identical laser reflection is transmitted back to the wavelength division multiplexer, is followed with to the laser that the first laser device is exported
Ring is transmitted, until from the second output end stabilization output pulse width and the reflection bandwidth identical laser of the coupler, following
In ring transmitting procedure, the saturable absorber is filtered out and the reflection bandwidth identical laser；The Graphene chirp cloth
Glug grating is made of that the Chirp Bragg grating being corroded using covering superscribes Graphene.
2. the pulse width tuning laser based on light-operated Graphene Chirp Bragg grating according to claim 1, its feature
It is that the second laser is used for the watt level by changing output laser, to the Graphene Chirp Bragg light
The reflection bandwidth of grid carries out light-operated regulation, wherein the power of output laser is bigger, the Graphene Chirp Bragg grating after regulation
Reflection bandwidth it is wider.
3. the pulse width tuning laser based on light-operated Graphene Chirp Bragg grating according to claim 1, its feature
It is, also the erbium-doped fiber including being arranged between the wavelength division multiplexer and the coupler.
4. the pulse width tuning laser based on light-operated Graphene Chirp Bragg grating according to claim 1 or 3, it is special
Levy and be, also the Polarization Controller including being arranged between the wavelength division multiplexer and the coupler.
5. the pulse width tuning laser based on light-operated Graphene Chirp Bragg grating according to claim 4, its feature
It is, also the isolator including being arranged between the wavelength division multiplexer and the coupler.
6. the pulse width tuning laser based on light-operated Graphene Chirp Bragg grating according to claim 1, its feature
It is that the length of the Chirp Bragg grating that Graphene is wrapped up is 3 to 6 millimeters in the Graphene Chirp Bragg grating.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107732639A (en) * | 2017-10-26 | 2018-02-23 | 杨晓艳 | A kind of adjustable mode locked fiber laser and pulse laser production method |
| CN107946889A (en) * | 2017-11-23 | 2018-04-20 | 黑龙江工程学院 | A kind of multiple Pulse Compression solid laser system |
| CN107994455A (en) * | 2017-11-23 | 2018-05-04 | 黑龙江工程学院 | A kind of multichannel end pumping narrow spaces thin slice solid state laser |
| CN108365505A (en) * | 2018-02-02 | 2018-08-03 | 武汉安扬激光技术有限责任公司 | A kind of lossless tandem type pulse stretcher of all -fiber |
| US11233372B2 (en) * | 2019-06-25 | 2022-01-25 | Lumentum Operations Llc | Femtosecond pulse stretching fiber oscillator |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732639A (en) * | 2017-10-26 | 2018-02-23 | 杨晓艳 | A kind of adjustable mode locked fiber laser and pulse laser production method |
| CN107946889A (en) * | 2017-11-23 | 2018-04-20 | 黑龙江工程学院 | A kind of multiple Pulse Compression solid laser system |
| CN107994455A (en) * | 2017-11-23 | 2018-05-04 | 黑龙江工程学院 | A kind of multichannel end pumping narrow spaces thin slice solid state laser |
| CN108365505A (en) * | 2018-02-02 | 2018-08-03 | 武汉安扬激光技术有限责任公司 | A kind of lossless tandem type pulse stretcher of all -fiber |
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| US11817672B2 (en) | 2019-06-25 | 2023-11-14 | Lumentum Operations Llc | Femtosecond pulse stretching fiber oscillator |
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| Publication number | Publication date |
|---|---|
| CN106877121B (en) | 2019-10-25 |
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