CN104577677B - Cascade-connection photon crystal optical fiber laser - Google Patents
Cascade-connection photon crystal optical fiber laser Download PDFInfo
- Publication number
- CN104577677B CN104577677B CN201510031349.6A CN201510031349A CN104577677B CN 104577677 B CN104577677 B CN 104577677B CN 201510031349 A CN201510031349 A CN 201510031349A CN 104577677 B CN104577677 B CN 104577677B
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- cascade
- airport
- fiber laser
- laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Lasers (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
A kind of cascade-connection photon crystal optical fiber laser is in series by pumping source and the quartzy photonic crystal fiber of no-welding-spot cascade.The main energetic that the present invention can be located at centre wavelength the ultrafast optical fiber laser near 1050nm carries out wavelength convert, obtains the cascade-connection photon crystal optical-fiber laser of the broad-band illumination in 400 800nm visible-ranges.
Description
Technical field
The present invention relates to optical fiber laser, especially a kind of cascade-connection photon crystal optical fiber laser.
Background technology
Super continuous spectrums laser is the broad band laser light source being fabricated using the non-linear phenomena in optical fiber.Super continuous spectrums
Generation be when high power ultrafast laser is by one section of nonlinear dielectric (be typically optical fiber), spectrum is converted to by laser of narrowband
The phenomenon that wideband light source.In this wideband light source, the dispersion for broadening the generation with new frequency content and being based primarily upon optical fiber of spectrum
The collective effect of the nonlinear effects such as Self-phase modulation, Cross-phase Modulation, four-wave mixing, stimulated Raman scattering.Cause
It is not easy to meet to generate the new required condition of spectral component, visible light is obtained by the pump light near common 1060nm
Wave band, the especially super continuous spectrums of shortwave royal purple optical range still need the optical fiber of special designing and special technology.
In the experiment that H H.Chen et al. (referring to Laser Phys.Lett.10 (2013) 085401) are reported, by right
The mode of one section of existing photonic crystal fiber (hereinafter referred to as PCF) succeeding stretch, obtains the grade with multiple conical sections
Join optical fiber, and therefrom obtains the super continuous spectrums for containing blue violet light.Its spreading process includes three parts, is at one zero first
Dispersion wavelength (ZDW) obtains narrowband super continuous spectrums in the PCF1 less than 1064nm.Second step injects this narrowband super continuous spectrums and arrives
The further broadening of spectrum is obtained in one PCF1 by drawing cone with shorter ZDW.Third walks the light that second step is obtained
In the PCF2 of drawing cone of the injection one with different air filling fractions, shortwave spectral component is obtained.This special conical fiber
Preparation fibre-optical drawing completion carry out later.Pass through part pressurization, heating and the system for stretching realization tapering to PCF
Make.The super continuous spectrums of generation are between 352nm to 1750nm, but spectrum later 1000nm includes relatively high energy, general
5 are higher by 10dB all over the light compared with visible-range.
Invention content
Present invention seek to address that visible-range super continuous spectrums are not readily available, the not high problem of energy utilization efficiency carries
For a kind of cascade-connection photon crystal optical fiber laser, realize that the mean power of spectral region 400nm-800nm reaches the super company of watt grade
Continuous spectrum laser output.
Technical solution of the invention is as follows：
A kind of cascade-connection photon crystal optical fiber laser, feature are by pumping source and the quartzy photonic crystal of no-welding-spot cascade
Optical fiber is in series, and the pumping source mixes ytterbium picosecond optical fiber laser, the quartzy light of no-welding-spot cascade for 1064nm's
Photonic crystal fiber is a kind of microstructured optical fibers based on quartz material and containing airport, which has in the direction of propagation of light
There is three stage structure：Prime optical fiber, intermediate transition optical fiber and rear class optical fiber, the prime optical fiber have 2~4 microns of fibre core
Diameter-spacing ratio of size, airport is 0.3~0.5, fibre of the rear class optical fiber with 0.85 to 1 micron of submicron order
Diameter-spacing ratio of core diameter, airport is 0.9~0.95, and intermediate transition optical fiber is tapered.
The main body of the quartzy photonic crystal fiber of no-welding-spot cascade is the airport of equilateral triangle arrangement, background material
It is pure quartz glass, centered on one airport of any of which, adjacent six airports are arranged at regular hexagon, described
Airport share nine layers.
Described mixes ytterbium picosecond optical fiber laser and the quartzy photonic crystal fiber of cascade by commercial heat sealing machine, will mix ytterbium skin
Photonic crystal fiber is directly fused forms for the output tail optical fiber and cascade quartz of second optical fiber laser.
The technique effect of the present invention
The cascade-connection photon crystal optical fiber laser of spectral region 400nm-800nm may be implemented in the present invention.It is this cascade
Quartzy photonic crystal fiber does not have solder joint.The visible light wave range spectrum of generation can be concentrated>50% is coupled into pumped fiber
Luminous power is a kind of efficient wavelength convert scheme.1064nm laser developments as pumping source are ripe, can be in a fiber
It is readily available the coupled power of 2W or more, therefore this programme can realize the power more than 1W in visible-range.
The mechanism that two-stage spectrum widening in the present invention is utilized is：Prime optical fiber utilizes orphan's capture effect by pump light
Energy is moved to shortwave direction.It is happened at the soliton self-frequency sh based on excited Raman effect of optical fiber the anomalous dispersion region, is slowed down
The group velocity of orphan so that orphan can be overlapped with the dispersive wave of shortwave length direction in time domain, pass through Cross-phase Modulation and four
Most pump energy is passed to the dispersive wave between 500-700nm by the nonlinear interactions mechanism such as wave mixing, and it is lonely
The short wavelength position that the limit range of sub- self-frequency shift matches forms stable pulse peak.Rear class optical fiber is defeated using prime optical fiber
Enter, continues in visible-range stretched-out spectrum.
Description of the drawings
Fig. 1 is laser schematic diagram of the present invention
Fig. 2 is optical fiber structure figure of the present invention
Fig. 3 is fiber cross-sections figure of the present invention
Fig. 4 is fibre-optical dispersion figure
Fig. 5 is spectrogram after prime optical fiber transmission 0.5m
Fig. 6 is spectrogram after rear class optical fiber transmission 4mm
Specific implementation mode
In embodiment, optical fiber laser uses MenloSystems companies Orange Femtosecond Ytterbium
Laser laser systems.Cascade-connection photon crystal optical fiber laser of the present invention includes that Yb dosed optical fiber picosecond near 1064nm swashs
Light device is as pumping source, and cascade-connection photon crystal optical fiber two parts directly fused with the tail optical fiber of Yb dosed optical fiber picosecond laser
(referring to Fig. 1).Feature is that using the cascade non-linear quartzy photonic crystal fiber of no-welding-spot as nonlinear dielectric,
The cascade-connection photon crystal optical fiber laser that pump energy more than 50% broadens within the scope of 400-800nm.
In series by pumping source and the quartzy photonic crystal fiber of no-welding-spot cascade, the pumping source is mixing for 1064nm
Ytterbium picosecond optical fiber laser, the quartzy photonic crystal fiber of no-welding-spot cascade are one kind based on quartz material and contain air
The microstructured optical fibers in hole.Using nonlinear effect of the pumping source in microstructured optical fibers, the pump energy of 1064nm is converted
The visible-range for arriving 800nm to 400, it is seen that power can reach 1W ranks in spectral region.
The main body of the cascade-connection photon crystal optical fiber is the airport of equilateral triangle arrangement, and background material is pure quartzy glass
Glass.It is made of prime optical fiber, rear class optical fiber and the tapered transition portion of centre with different air filling fractions.Please refer to Fig. 2.
The sectional view of prime optical fiber and rear class optical fiber please refers to Fig. 3.In this structure, the pitch of holes of adjacent airport is Λ, round empty
A diameter of d of stomata.Prime optical fiber has 2-4 microns of core size, the smaller air aperture-between 0.3 to 0.5
Spacing ratio (d/ Λ) moves the second zero-dispersion wavelength of optical fiber to long wave direction so that soliton self-frequency sh is not because enter just
Normal dispersion area and premature end, to realize and the dispersive wave Group-velocity Matching in more shortwave direction, by energy to wavelength short as possible
It is mobile.This level-one optical fiber needs 40-70 centimetres of length to realize spectrum widening.Rear class optical fiber has 0.85 to 1 micron of Asia
Micron-sized core diameter, larger air aperture-spacing ratio (d/ Λ) between 0.9 to 0.95, with by strong
Waveguide dispersion balancing material dispersion makes the first zero-dispersion wavelength of optical fiber between 500-700nm, it will utilize first order optical fiber
Pumping source is made in the super continuous spectrums pulse of output, and the pumping of this nearly zero-dispersion wavelength can obtain wide and flat super continuous spectrums
Type realizes the broadening of the super continuous spectrums within the scope of 400-800nm.It is larger that smaller core size so that this section of optical fiber has
Nonlinear factor needs the broadening of several centimeters of realization spectrum.
The quartzy photonic crystal fiber of no-welding-spot cascade of the present invention is to prepare preform using stacking, and incite somebody to action
Two-stage optical fiber and intermediate tapering once draw molding on fiber drawing tower.The optical fiber the last period pulled out is prime light
Fibre, latter section is rear class optical fiber, excessive with conical fiber between two-stage optical fiber, and solder joint is not present.
The preparation method of preform of the present invention is：Solid quartz pushrod and hollow quartz ampoule are drawn into outer
These pipe sticks are carried out macroscopic alignment according to the microstructure of optical fiber in a mold and carried out by the capillary stick and capillary of diameter 1mm
Pre-sintering makes them be fixedly combined together, becomes preform.
It is of the present invention once to draw molding process, it needs in fiber draw process, using air pump to prefabricated rods
The gas pressure intensity of middle airport is controlled, and is monitored to the tension born on optical fiber.Utilize tonometry on optical fiber
Device monitors in real time, and according to the difference of optical fiber structure parameter, to wire-drawing temperature, the gentle pressure of drawing speed is adjusted.Optical fiber
Pulling process meets such equation：
Wherein r and R indicates the radius of optical fiber and prefabricated rods cross section respectively.P indicates that pressure, б indicate surface tension, R tables
Show the diameter of airport in prefabricated rods, Sf、SpThe feeding speed of optical fiber traction and prefabricated rods on wire-drawer-tower is indicated respectively.It completes
After first order drawing optical fibers, rapidly increases the air pressure in prefabricated rods and improve drawing speed, with shorter tapering transition
To second level optical fiber.Reduce the Butt-coupling loss between two-stage optical fiber in this way.According to mechanical equation, the pulling process of optical fiber
Meet following equation：
Wherein l is the length of transition between prefabricated rods and optical fiber.η is viscosity.It may know that by equation, if optical fiber
Gathering speed increases, and can at logarithmic relationship influence the tension in optical fiber.So according to scheme provided by the invention, front and back
Between grade, the drawing velocity of optical fiber needs 4 to 5 times of raising, and optical fiber will not disconnect, and wire drawing is made to fail.Fig. 4 gives one
Kind meets the cascade silica fibre front and back stages dispersion that above-mentioned feature can be used in the generation of visible light wave range broad band laser.Fig. 5
The dispersion curve provided according to Fig. 4 is given, by the 1064nm pulses of incident 4ps pulsewidths 25kW peak powers in optical fiber end
The prime spectrum widening figure of acquisition is simulated in face.As seen from the figure, the spectral energy more than 70% has concentrated between 550-700nm.
After Fig. 6 gives the spectrum that the injection prime optical fiber that simulation obtains generates, what is generated in rear class optical fiber is visible
Optical range spectrum.Its 20dB bandwidth can cover 400 and arrive 800nm visible light wave ranges.
Prime structural parameters Λ=2.37 μm of cascaded optical fiber, Λ=0.4 d/.Rear class optical fiber structure parameter is the μ of Λ=0.9
Λ=0.91 m, d/.
Solid quartz pushrod and hollow quartz ampoule are drawn into the capillary stick and capillary of outer diameter 1mm on fiber drawing tower
Pipe.These pipe sticks are subjected to macroscopic alignment according to the microstructure of optical fiber in metal die and are pre-sintered, keep them steady
Admittedly be combined together, become preform.The air pressure that control is pumped into prefabricated rods is 2 to 5kPa.Maintain the feeding of wire-drawer-tower
Constant airspeed 0.2 arrives 0.4mm/min, and adjustment drawing speed monitors the outer diameter of drawing optical fiber in real time between 10-20cm/min,
Drawing optical fiber and the prime optical fiber of design is set to have same size.Temperature of smelting furnace is increased, when tension reduces in the optical fiber measured,
The air pressure that is pumped into is increased rapidly to 6-10kPa, increases the speed of the idler wheel for pulling optical fiber on wire-drawer-tower to 0.7 to 1.4m/min,
Obtain the photonic crystal fiber of cascade variable core diameter.
The cascade silica fibre and light source of acquisition are subjected to welding coupling, obtain the cascade that can export high-power visible spectrum
Photonic Crystal Fiber Lasers.
Claims (2)
1. a kind of cascade-connection photon crystal optical fiber laser, it is characterised in that by pumping source and the quartzy photonic crystal light of no-welding-spot cascade
Fine in series, the pumping source mixes ytterbium picosecond optical fiber laser, the quartzy photon of no-welding-spot cascade for 1064nm
Crystal optical fibre is a kind of microstructured optical fibers based on quartz material and containing airport, and the optical fiber laser is in the direction of propagation of light
It is upper that there is three stage structure：Prime optical fiber, intermediate transition optical fiber and rear class optical fiber, the prime optical fiber is with 2~4 microns
Diameter-spacing ratio of core size, airport is 0.3~0.5, and the rear class optical fiber has 0.85 to 1 micron of submicron order
Core diameter, diameter-spacing ratio of airport is 0.9~0.95, and intermediate transition optical fiber is tapered.
2. cascade-connection photon crystal optical fiber laser according to claim 1, it is characterised in that：The no-welding-spot cascades stone
The main body of English photonic crystal fiber is the airport of equilateral triangle arrangement, and background material is pure quartz glass, with any of which one
Centered on a airport, adjacent six airports are arranged at regular hexagon, and the airport shares nine layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510031349.6A CN104577677B (en) | 2015-01-22 | 2015-01-22 | Cascade-connection photon crystal optical fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510031349.6A CN104577677B (en) | 2015-01-22 | 2015-01-22 | Cascade-connection photon crystal optical fiber laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104577677A CN104577677A (en) | 2015-04-29 |
| CN104577677B true CN104577677B (en) | 2018-08-14 |
Family
ID=53093168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510031349.6A Active CN104577677B (en) | 2015-01-22 | 2015-01-22 | Cascade-connection photon crystal optical fiber laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104577677B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449501A (en) * | 2015-12-29 | 2016-03-30 | 中国电子科技集团公司第十一研究所 | Fiber laser |
| CN110445000A (en) * | 2019-06-30 | 2019-11-12 | 天津大学 | 1000-1100nm tunable wave length fs-laser system |
| CN114585953A (en) * | 2019-10-24 | 2022-06-03 | Asml荷兰有限公司 | Hollow core photonic crystal fiber based optical components for broadband radiation generation |
| WO2024113285A1 (en) * | 2022-11-30 | 2024-06-06 | 华为技术有限公司 | Antenna, antenna array, and communication device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584642A (en) * | 2004-06-11 | 2005-02-23 | 上海大学 | Dispersion gradual change and dispersion self-compensating photon crystal optical fibre |
| CN201332211Y (en) * | 2008-12-31 | 2009-10-21 | 中国科学院西安光学精密机械研究所 | Visible light enhanced supercontinuum laser system with all-fiber structure |
| CN104166183A (en) * | 2014-08-25 | 2014-11-26 | 中国电子科技集团公司第十一研究所 | Double-clad fiber and photonic crystal fiber connecting method |
| CN104201545A (en) * | 2014-08-06 | 2014-12-10 | 深圳大学 | Ultra-wideband supercontinuum source based on two-waveband fiber optic laser |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1725899A2 (en) * | 2004-03-19 | 2006-11-29 | Crystal Fibre A/S | Optical coupler devices, methods of their production and use |
| FR2949158B1 (en) * | 2009-08-14 | 2012-02-03 | Draka Compteq France | MICROSTRUCTURED OPTICAL FIBER AND DEVICE FOR GENERATING BROADBAND WHITE LIGHT |
-
2015
- 2015-01-22 CN CN201510031349.6A patent/CN104577677B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584642A (en) * | 2004-06-11 | 2005-02-23 | 上海大学 | Dispersion gradual change and dispersion self-compensating photon crystal optical fibre |
| CN201332211Y (en) * | 2008-12-31 | 2009-10-21 | 中国科学院西安光学精密机械研究所 | Visible light enhanced supercontinuum laser system with all-fiber structure |
| CN104201545A (en) * | 2014-08-06 | 2014-12-10 | 深圳大学 | Ultra-wideband supercontinuum source based on two-waveband fiber optic laser |
| CN104166183A (en) * | 2014-08-25 | 2014-11-26 | 中国电子科技集团公司第十一研究所 | Double-clad fiber and photonic crystal fiber connecting method |
Non-Patent Citations (2)
| Title |
|---|
| High nonlinearity glass photonic crystal nanowires;N. A. Wolchover et al.;《OPTICS EXPRESS》;20070205;第15卷(第3期);第829－833页 * |
| Ultraviolet-extended flat supercontinuum generation in cascaded photonic crystal fiber tapers;H H Chen et al.;《Laser Phys. Lett.》;20130614;第10卷;第1页右栏第2段至第6页右栏第1段及附图1－4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104577677A (en) | 2015-04-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104577677B (en) | Cascade-connection photon crystal optical fiber laser | |
| CN104201545B (en) | Based on the ultra broadband super continuum source of two waveband optical fiber laser | |
| CN108512020B (en) | Incoherent super-continuum spectrum light source with controllable spectrum and tunable output power | |
| CN106647098B (en) | A kind of communication based on silicon nitride waveguides take in infrared super continuous spectrums production method | |
| CN101881919A (en) | Optical fiber chirped pulse amplifier for ultra-short laser pulse output | |
| CN105826800A (en) | All-optical fiber broadband flat intermediate-infrared super-continuum spectrum light source | |
| CN102967981A (en) | Super-continuous spectrum light source based on multicore photonic crystal fiber | |
| CN204118458U (en) | A kind of single mode full-optical-fiber laser | |
| CN204067843U (en) | A kind of ultra broadband super continuum source based on two waveband fiber laser | |
| CN202995205U (en) | Multicore photonic crystal fiber based supercontinuum source | |
| Qin et al. | Wideband supercontinuum generation in tapered tellurite microstructured fibers | |
| CN105896252B (en) | High power visible light strengthened super continuous spectrum light source | |
| Fatome et al. | Mid-infrared extension of supercontinuum in chalcogenide suspended core fibre through soliton gas pumping | |
| Ghosh et al. | Blue-extended sub-nanosecond supercontinuum generation in simply designed nonlinear microstructured optical fibers | |
| CN207651793U (en) | It is a kind of to realize the super continuous spectrums laser aid with flat spectrum | |
| CN206558873U (en) | A kind of ultra wide band random fiber laser based on multi wavelength pumping | |
| Gaponov et al. | 10µJ-class compact thulium all-fibered CPA system | |
| Chen et al. | Generation of a compact high-power high-efficiency normal-dispersion pumping supercontinuum in silica photonic crystal fiber pumped with a 1064-nm picosecond pulse | |
| Yan et al. | Combined nonlinear effects for UV to visible wavelength generation in a photonic crystal fiber | |
| CN205992656U (en) | A kind of super large bandwidth super continuous spectrums LASER Light Source | |
| Man et al. | Fabrication of indefinitely long tapered fibres for supercontinuum generation | |
| Maurel et al. | Soliton self-compression in air filled Kagome HCPCF | |
| Wangg et al. | Ultraviolet-extended flat SC generation in seven-core photonic crystal fiber | |
| Roy et al. | Advancing Ultrafast Pulse Frequency Shifting with Elliptical Core Chalcogenide Fiber | |
| Li et al. | The tapered tellurite microstructure optical fiber for the super-continuum generation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |