CN106253042A - Broadband based on super continuum source is tunable pulse optical fiber - Google Patents
Broadband based on super continuum source is tunable pulse optical fiber Download PDFInfo
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- CN106253042A CN106253042A CN201610919861.9A CN201610919861A CN106253042A CN 106253042 A CN106253042 A CN 106253042A CN 201610919861 A CN201610919861 A CN 201610919861A CN 106253042 A CN106253042 A CN 106253042A
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- optical fiber
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- super continuum
- laser
- prism coupler
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- 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
- H01S3/05—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
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
A kind of tunable pulse optical fiber of broadband based on super continuum source, including the pumping source for exporting pump light, on the right side of pump light emergent light axis horizontal direction, it is disposed with fibre optic isolater, power amplifier, the first prism coupler, highly nonlinear optical fiber, the second prism coupler, mid-infrared beam splitter, spectrogrph and filtration module；Present configuration is simple, volume is little, laser is tunable, and wave band is wider, tuned speed fast, reduces manufacturing process difficulty and production cost, can promote the use of in high-capacity optical fiber communication.
Description
Technical field
The invention belongs to field of laser device technology, be specifically related to a kind of broadband based on super continuum source tunable
Pulse optical fiber.
Background technology
Along with developing rapidly of technology, high-capacity optical fiber communication has become trend.At present, wavelength-division multiplex (WDM) technology and
The fiber optic communication that develops into of Optical Time Division Multiplexing (OTDM) technology provides technical support, but any in both technology
Plant further expansion message capacity in technical foundation the most extremely difficult, if both technology can be combined the most permissible
Realize bigger message capacity, in such a system, need the ultrashort light pulse source of multi-wavelength to make the transmitting light source of system.
Broadband based on super continuum source is tunable, and that ultrashort light pulse can produce multi-wavelength in wider spectral region is ultrashort
Light pulse, can be completely covered near-infrared, middle-infrared band.So it has important work in following high-capacity optical fiber communication
With.
Traditional several Wavelength tunable lasers include: tunable passive mode-locking optical fiber based on fiber nonlinear effect
Laser instrument, Bragg reflection laser and distributed feedback laser etc.；For above several laser instrument, tunable wavelength
Scope is narrower, and light path is extremely complex, complex operation, and packaged type and technique are complex, and some also suffers from ambient temperature
Impact, the most relatively costly, strongly limit manufacture and the application of tunable laser.
Summary of the invention
The technical problem to be solved is to overcome above-mentioned deficiency, provide a kind of reasonable in design, simple in construction,
Easy to operate, reduce cost, can realize more broadband direction measurement output based on super continuum source wide ripple
The tunable pulse optical fiber of section.
Solve above-mentioned technical problem to the technical scheme is that and set gradually on the right side of pump light emergent light axis horizontal direction
There are fibre optic isolater, power amplifier, the first prism coupler, highly nonlinear optical fiber, the second prism coupler, mid-infrared beam splitting
Mirror, spectrogrph and filtration module；
Pumping laser is amplified and exports by described power amplifier；
Described highly nonlinear optical fiber is for producing smooth super continuum source；
The first described prism coupler makes general single mode light realize low-loss with highly nonlinear optical fiber to couple；Second lens
Bonder realizes the low-loss coupling output of wideband light source；
The detection separating about 1% is exported the detection of the spectrum detection instrument described in entering by described mid-infrared beam splitter, its
Remaining light is exported by the pulse laser of the required wavelength of described filtration module and then generation.
The pumping source of the present invention is the optical fiber laser of 2 mum wavelengths.
The pumping source of the present invention is the thulium-doped fiber laser of 2 mum wavelengths.
The highly nonlinear optical fiber of the present invention is micro structure chalcogenide fiber.
First prism coupler of the present invention and the second prism coupler are GaF2 mid-infrared NA matched lenses.
The filtration module of the present invention includes the first collimating lens, diffraction grating, the second collimating lens and dark slide, described
Diffraction grating be obliquely installed in the right side of the first described collimating lens light emergent light axis horizontal direction, described second collimation
Lens are arranged at the underface of described diffraction grating, and the underface of the second collimating lens is provided with dark slide；Described shading
Plate upper surface scribbles extinction material and is provided with manhole.
The power amplifier of the present invention includes semiconductor laser, optical-fiber bundling device and gain fibre, and described partly leads
The right side of body laser sets gradually optical-fiber bundling device and gain fibre.
The gain fibre of the present invention is rear-earth-doped doubly clad optical fiber.
On the right side of pump light emergent light axis horizontal direction, it is disposed with fibre optic isolater, power owing to present invention employs
Amplifier, the first prism coupler, highly nonlinear optical fiber, the second prism coupler, mid-infrared beam splitter, spectrogrph and filtering mould
Block, the first prism coupler makes general single mode light realize low-loss with highly nonlinear optical fiber to couple, owing to using high non-linearity light
Fine, it is possible to obtaining smooth mid-infrared super continuous spectrums wideband light source, the second prism coupler realizes the low-loss coupling of wideband light source
Close output, in combination with filtration module, change the size of incident angle α by rotating diffraction grating thus change diffraction angle beta, it is achieved
The wideband light source that various different wave lengths are combined wavelength separated after optical grating diffraction so that wavelength correspondence dark slide manhole position
The light output put, it is achieved a broadband tunable pulse laser output, it is achieved a kind of wide ripple based on super continuum source
The tunable pulse optical fiber of section, present configuration is simple, volume is little, laser is tunable, and wave band is wider, tuned speed fast, fall
Low manufacturing process difficulty and production cost, can promote the use of in high-capacity optical fiber communication.
Accompanying drawing explanation
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the structural representation of filtration module 12 in Fig. 1.
Fig. 3 is the matching dispersion curve of micro structure chalcogenide fiber in the embodiment of the present invention 1.
In figure: 1, pumping source；2, fibre optic isolater；3, semiconductor laser；4, optical-fiber bundling device；5, gain fibre；6、
Power amplifier；7, the first prism coupler；8, highly nonlinear optical fiber；9, the second prism coupler；10, mid-infrared beam splitter；
11, spectrogrph；12, filtration module；121, the first collimating lens；122, diffraction grating；123, the second collimating lens；124, shading
Plate.
Detailed description of the invention
With embodiment, the present invention is described in further details below in conjunction with the accompanying drawings, but the invention is not restricted to these and implement
Example.
Embodiment 1
In FIG, the present invention includes the pumping source 1 for exporting pump light, and the pumping source 1 of the present embodiment is 2 mum wavelengths
Optical fiber laser, it is preferable that this optical fiber laser is thulium-doped fiber laser, for realize with highly nonlinear optical fiber 8 zero color
Dissipate the coupling of wavelength.Be disposed with on the right side of pump light emergent light axis horizontal direction fibre optic isolater 2, power amplifier 6,
One prism coupler 7, highly nonlinear optical fiber the 8, second prism coupler 9, mid-infrared beam splitter 10, spectrogrph 11 and filtration module
12；Fibre optic isolater 2 eliminates back kick and loses the additional noise of generation the laser-bounce after power amplification can be prevented simultaneously to front
Level system causes damage, the specification of fibre optic isolater 2 to be 2 μm optical fiber faraday's optically active form isolators, through fibre optic isolater 2
Laser ingoing power amplifier 6 carries out power amplification and exports, and described power amplifier 6 includes semiconductor laser 3, optical fiber
Bundling device 4 and gain fibre 5, the right side of semiconductor laser 3 is disposed with optical-fiber bundling device and gain fibre 5, gain light
Fine 5 is rear-earth-doped doubly clad optical fiber, laser light the first prism coupler 7 through power amplifier 6 output realize with
The low-loss coupling of highly nonlinear optical fiber 8, further, the highly nonlinear optical fiber 8 of the present embodiment is micro structure chalcogenide fiber,
Due to the nonlinear factor that its dispersion is controlled and higher, it is possible to produce the smooth mid-infrared with a width of 1 μm～5 μm super continuous
Spectrum wideband light source, Fig. 3 is the matching dispersion curve of the present embodiment micro structure chalcogenide fiber, and it is left that its zero-dispersion wavelength is positioned at 2 μm
The right side, and the optical maser wavelength of pumping source 1 output is 2 μm, it is possible to well the zero-dispersion wavelength with highly nonlinear optical fiber 8 matches,
High nonlinear coefficient based on highly nonlinear optical fiber 8 and multiple nonlinear effect such as Self-phase modulation, Cross-phase Modulation, it is subject to
Swashing the common effect of Raman scattering and four-wave mixing etc. makes output spectrum obtain great broadening, and pumping source 1 output
Laser center wavelength matches with the zero-dispersion wavelength of highly nonlinear optical fiber 8, thus obtains smooth with a width of 1 μm～5 μm
Mid-infrared super continuous spectrums wideband light source, then realized the low-loss coupling output of wideband light source by the second prism coupler 9, further
Ground, first prism coupler 7 of the present embodiment and the second prism coupler 9 are GaF2 mid-infrared NA matched lenses, make common list
Mode fiber realizes low-loss with highly nonlinear optical fiber and couples；The wideband light source obtained through backing system will through mid-infrared beam splitter 10
The detection output entrance spectrogrph 11 separating about 1% detects, and it is adjustable that remaining optical transport realizes broadband by filtration module 12
Pulse laser.
In fig. 2, the filtration module 12 of the present embodiment includes that the first collimating lens 121, diffraction grating 122, second collimate
Lens 123 and dark slide 124, described diffraction grating 122 is obliquely installed in the first described smooth emergent light of collimating lens 121
The right side of axle horizontal direction, the second described collimating lens 123 is arranged at the underface of described diffraction grating 122, and second is accurate
The underface of straight lens 123 is provided with dark slide 124；Described dark slide 124 upper surface scribbles extinction material and is provided with circle
Shape through hole, wideband light source makes light collimation project on diffraction grating 122 by collimating lens 121, acts on through diffraction grating 122
The light of different wave length can be separated, more collimated lens 123 carry out light collimation, finally the light of wavelength separated are projected setting
There is the diverse location of the dark slide 124 of manhole, owing to being coated with extinction on the dark slide 124 position in addition to manhole
Material, so, the only wavelength laser corresponding to manhole position can export, and the light of other wavelength is all absorbed.Wherein,
The angle of incidence of light and diffraction grating 122 after the first described collimating lens 121 collimates is α, and this light is through diffraction
The angle of diffraction after grating 122 diffraction is β, and described incident angle α and diffraction angle beta meet grating equation d (sin α ± sin β)=m λ,
In formula, d is grating constant, and λ is wavelength, and m is spectrum progression, takes m=1 here, changes angle of incidence by rotating diffraction grating 122
The size of α thus change diffraction angle beta, it is achieved various different wave lengths compound wideband light source wavelength separated after optical grating diffraction,
The light making wavelength correspondence dark slide 124 manhole position exports, it is achieved a broadband tunable pulse laser output.
The operation principle of the present invention is as follows:
Using the device of the embodiment of the present invention 1, pumping source 1 output wavelength is the laser of 2 μm, after fibre optic isolater 2
It is transferred to power amplifier 6, carries out power amplification through power amplifier 6 and export, saturating through the laser of power amplifier 6 output
Cross the first prism coupler 7 to realize coupling with the low-loss of highly nonlinear optical fiber 8 obtaining smooth mid-infrared super continuous spectrums broadband
Light source, wherein high-linear optical fiber 8 is micro structure chalcogenide fiber, then is realized the low damage of wideband light source by the second prism coupler 9
Consumption coupling output, the detection separating about 1% is exported entrance spectrogrph 11 through mid-infrared beam splitter 10 by the wideband light source obtained
Detection, remaining optical transport passes through filtration module 12, and wideband light source makes light collimation project diffraction grating by collimating lens 121
On 122, act on through diffraction grating 122 and the light of different wave length is separated, more collimated lens 123 carry out light collimation, finally will
The light of wavelength separated projects the diverse location of the dark slide 124 being provided with manhole, owing to dark slide 124 is except manhole
It is coated with extinction material on position in addition, so, the only wavelength laser corresponding to manhole position can export, other
The light of wavelength is all absorbed, and from grating equation d (sin α ± sin β)=m λ, in formula, d is grating constant, and λ is wavelength, and α is
Angle of incidence, β is the angle of diffraction, and m is spectrum progression, takes m=1 here, is changed the size of incident angle α by rotating diffraction grating 122
Thus change diffraction angle beta, it is achieved the wideband light source that various different wave lengths are combined wavelength separated after optical grating diffraction so that wavelength
The light output of corresponding dark slide 124 manhole position, it is achieved a broadband tunable pulse laser output.
Claims (8)
1. the tunable pulse optical fiber of broadband based on super continuum source, including the pump for exporting pump light
Source, Pu, it is characterised in that: be disposed with on the right side of pump light emergent light axis horizontal direction fibre optic isolater, power amplifier,
First prism coupler, highly nonlinear optical fiber, the second prism coupler, mid-infrared beam splitter, spectrogrph and filtration module；
Pumping laser is amplified and exports by described power amplifier；
Described highly nonlinear optical fiber is for producing smooth super continuum source；
The first described prism coupler makes general single mode light realize low-loss with highly nonlinear optical fiber to couple；Second Lens Coupling
Device realizes the low-loss coupling output of wideband light source；
The detection separating about 1% is exported the detection of the spectrum detection instrument described in entering, its remaining light by described mid-infrared beam splitter
Exported by the pulse laser of the required wavelength of described filtration module and then generation.
The tunable pulse optical fiber of broadband based on super continuum source the most according to claim 1, its feature
It is: described pumping source is the optical fiber laser of 2 mum wavelengths.
The tunable pulse optical fiber of broadband based on super continuum source the most according to claim 2, its feature
It is: described pumping source is the thulium-doped fiber laser of 2 mum wavelengths.
The tunable pulse optical fiber of broadband based on super continuum source the most according to claim 3, its feature
It is: described highly nonlinear optical fiber is micro structure chalcogenide fiber.
The tunable pulse optical fiber of broadband based on super continuum source the most according to claim 4, its feature
It is: the first described prism coupler and the second prism coupler are GaF2 mid-infrared NA matched lenses.
The tunable pulse optical fiber of broadband based on super continuum source the most according to claim 5, its feature
Being: described filtration module includes the first collimating lens, diffraction grating, the second collimating lens and dark slide, described spreads out
Penetrate grating slope and be arranged at the right side of the first described collimating lens light emergent light axis horizontal direction, the second described collimating lens
Being arranged at the underface of described diffraction grating, the underface of the second collimating lens is provided with dark slide；In described dark slide
Surface scribbles extinction material and is provided with manhole.
The tunable pulse optical fiber of broadband based on super continuum source the most according to claim 1, its feature
It is: described power amplifier includes semiconductor laser, optical-fiber bundling device and gain fibre, described semiconductor laser
The right side of device sets gradually optical-fiber bundling device and gain fibre.
The tunable pulse optical fiber of broadband based on super continuum source the most according to claim 7, its feature
It is: described gain fibre is rear-earth-doped doubly clad optical fiber.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410579A (en) * | 2016-11-24 | 2017-02-15 | 电子科技大学 | Ultra-wide-band mid-infrared optical fiber superfluorescence emitter |
| CN106872402A (en) * | 2017-03-22 | 2017-06-20 | 河北大学 | Gas-detecting device and method based on super continuous spectrums laser |
| CN108512020A (en) * | 2017-09-22 | 2018-09-07 | 中国人民解放军国防科技大学 | Incoherent super-continuum spectrum light source with controllable spectrum and tunable output power |
| CN108666858A (en) * | 2018-04-24 | 2018-10-16 | 上海理工大学 | A kind of multi-wavelength femtosecond Raman fiber lasers |
| ES2712323A1 (en) * | 2017-11-07 | 2019-05-10 | Univ Miguel Hernandez | LASER SYSTEM WITH TUNED DIGITAL SPECTRUM (Machine-translation by Google Translate, not legally binding) |
| CN111638192A (en) * | 2020-06-08 | 2020-09-08 | 南京大学 | Tunable pumping-detection system based on super-continuum spectrum light source |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410579A (en) * | 2016-11-24 | 2017-02-15 | 电子科技大学 | Ultra-wide-band mid-infrared optical fiber superfluorescence emitter |
| CN106410579B (en) * | 2016-11-24 | 2018-11-13 | 电子科技大学 | A kind of ultra wide band mid-infrared light fibre Superfluorescence device |
| CN106872402A (en) * | 2017-03-22 | 2017-06-20 | 河北大学 | Gas-detecting device and method based on super continuous spectrums laser |
| CN108512020A (en) * | 2017-09-22 | 2018-09-07 | 中国人民解放军国防科技大学 | Incoherent super-continuum spectrum light source with controllable spectrum and tunable output power |
| CN108512020B (en) * | 2017-09-22 | 2019-06-25 | 中国人民解放军国防科技大学 | Incoherent super-continuum spectrum light source with controllable spectrum and tunable output power |
| ES2712323A1 (en) * | 2017-11-07 | 2019-05-10 | Univ Miguel Hernandez | LASER SYSTEM WITH TUNED DIGITAL SPECTRUM (Machine-translation by Google Translate, not legally binding) |
| WO2019092296A3 (en) * | 2017-11-07 | 2019-06-20 | Universidad Miguel Hernandez | Laser system having a tunable digital spectrum |
| CN108666858A (en) * | 2018-04-24 | 2018-10-16 | 上海理工大学 | A kind of multi-wavelength femtosecond Raman fiber lasers |
| CN111638192A (en) * | 2020-06-08 | 2020-09-08 | 南京大学 | Tunable pumping-detection system based on super-continuum spectrum light source |
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| CN106253042B (en) | 2023-04-25 |
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