CN106253036A - The band hollow porose area photonic crystal fiber tunable laser filled based on quantum dot - Google Patents
The band hollow porose area photonic crystal fiber tunable laser filled based on quantum dot Download PDFInfo
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- CN106253036A CN106253036A CN201610707354.9A CN201610707354A CN106253036A CN 106253036 A CN106253036 A CN 106253036A CN 201610707354 A CN201610707354 A CN 201610707354A CN 106253036 A CN106253036 A CN 106253036A
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- 239000004038 photonic crystal Substances 0.000 title claims abstract description 76
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- YBNMDCCMCLUHBL-UHFFFAOYSA-N (2,5-dioxopyrrolidin-1-yl) 4-pyren-1-ylbutanoate Chemical group C=1C=C(C2=C34)C=CC3=CC=CC4=CC=C2C=1CCCC(=O)ON1C(=O)CCC1=O YBNMDCCMCLUHBL-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000003287 optical effect Effects 0.000 claims abstract description 21
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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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08059—Constructional details of the reflector, e.g. shape
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
Abstract
The invention discloses a kind of band hollow porose area photonic crystal fiber tunable laser filled based on quantum dot, including light source input, optical resonator and laser output, light source input is sequentially provided with the laser pumping source that can export pump light continuously, pump light is carried out the pumping coupling system that collimation adjusts, laser output is provided with reflecting mirror, dichroic mirror and photonic crystal fiber it is provided with between pumping coupling system and reflecting mirror, the space that optical resonator is surrounded by dichroic mirror and reflecting mirror is constituted, photonic crystal fiber is positioned in optical resonator, photonic crystal fiber is filled with gain medium, this gain medium is PbSe quantum dot.The present invention is had simple in construction, can realize stable output, realized the advantage such as tuning operation of laser instrument by the size changing quantum dot.
Description
Technical field
The invention belongs to quantum dot light photonic crystal fiber field of laser device technology, a kind of based on quantum dot filling
Carry hollow porose area photonic crystal fiber tunable laser.
Background technology
Rare earth ion doped (such as Yb, Er, Ho, Tm etc.) optical fiber laser, owing to it has high light beam quality, high conversion
The feature such as efficiency and high-gain so that the performance of optical fiber laser is greatly improved.Traditional rare earth ion doping light
Fibre laser nearly reaches optimization through development for many years, the optical fiber laser performance of native element doping.Along with quantum dot
Material develops rapidly, proposes laser instrument based on quantum dot.Artificial quanta point material possess good, the most preferably absorb
And radiation spectrum, their optical property depends primarily on radius size, unrelated with composition, just may be used by the size changing quantum dot
Spectrum with the arbitrfary point in obtaining from ultraviolet near infrared range.These superioritys are that natural rare earth element is unable to reach or has
Standby.In theory, quantum dot (QD) laser instrument than SQW, quantum wire laser have higher characteristic temperature, higher
The spies such as light efficiency and the differential gain, lower threshold current and frequency chirp, narrower spectral line width and ultrafast high frequency response
Property.
Photonic crystal fiber (Photonic Crystal Fiber, PCF) special transmission mechanism and can flexible design
Structure, makes it have the peculiar property that ordinary optic fibre is incomparable.Its cross section is by periodically (usually hexagonal periodic row
Row) airport arrangement form and axially extending along whole optical fiber, form two-dimensional photon crystal structure；Fibre core is by quartzy or empty
Pore constitutes line defect, utilizes the ability of its local light, propagates in light is limited in defect.At research photonic crystal fiber itself
While micro structure and optic fibre characteristic thereof, research worker is also dedicated to filled media material in airport, such as gas, polymerization
Thing, liquid crystal, quantum dot etc., it is possible to design adjustable fiber functions device.Existing Photonic Crystal Fiber Lasers is exactly will
Photonic crystal fiber doped with gain substance replaces original doped fiber to obtain Photonic Crystal Fiber Lasers.For this
For planting Photonic Crystal Fiber Lasers, although it has the advantage of itself, but tuning operation can not be realized.
Due to the Energy levels characteristic of quantum dot, and the quantum confined effect of quantum dot and small-size effect, it is launched
Peak can be tuned according to quantum dot size, and this advantage can make quantum dot produce tunable laser.Quantum dot has width
Absorption spectrum and wider emission spectrum, it is possible to tune peak luminous wavelength by its size.
Quantum dot and photonic crystal fiber are the two kinds of artificial materials being currently in international research forward position, and the former embodies right
The control action of electron energy band, the latter then embodies the control action to photonic band gap.But prior art does not have material
Openly report the technology being combined by above two material.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of band hollow porose area photon filled based on quantum dot
Crystal optical fibre tunable laser, the present invention is by designing a kind of photonic crystal fiber (cross-sectional structure figure with hollow porose area
As shown in Figure 1), the multiple hollow porose area of photonic crystal fiber is filled quantum dot, it is achieved hollow porose area photonic crystal will be carried
The purpose that optical fiber combines with quantum dot so that technical staff both can utilize waveguiding structure and the spy of photonic crystal fiber uniqueness
Some optical properties, it is also possible to utilize the spectral characteristic of quantum dot, it is possible to by changing the size filling quantum dot, real
The tunable output of existing C-band (1528nm～1565nm)；This laser instrument has simple in construction, can realize stable output, logical
Cross and change the size of quantum dot to realize the advantages such as the tuning operation of laser instrument.
To achieve these goals, the technical solution used in the present invention is: a kind of band hollow hole filled based on quantum dot
District's photonic crystal fiber tunable laser, it is characterised in that: include light source input, optical resonator and laser output,
Light source input is sequentially provided with can export the laser pumping source of pump light continuously, pump light carries out the pump coupling that collimation adjusts
System, laser output is provided with reflecting mirror, is provided with dichroic mirror and photonic crystal fiber, light between pumping coupling system and reflecting mirror
The space that resonator cavity is surrounded by dichroic mirror and reflecting mirror is constituted, and photonic crystal fiber is positioned in optical resonator, and photon is brilliant
Being filled with gain medium in body optical fiber, this gain medium is PbSe quantum dot.
The light source of above-mentioned pumping source output is as pump light after optical fiber output focus lamp shaping, and PbSe quantum dot is by pump
After Pu light irradiates, at optical resonance intracavity, light is vibrated back and forth, forms laser after being amplified by the spontaneous emission of PbSe quantum dot,
The laser produced exports through the reflecting mirror being close to photonic crystal end face；Fill by changing the hollow porose area at photonic crystal fiber
The size of quantum dot, it is possible to achieve the output of multi-wavelength.
Further, described photonic crystal fiber is fixedly installed on five dimension high precision adjusting racks, dichroic mirror and reflecting mirror
Lay respectively at the two ends of photonic crystal fiber.
The two ends of above-mentioned gain medium are separately fixed on five dimension high precision adjusting racks, in order to carry out the tune of laser instrument
Whole.
Further, described laser pumping source uses semiconductor laser.
Above-mentioned pumping source uses semiconductor laser, and light source is exported by tail optical fiber, and tail optical fiber passes through snap joint PMA and pumping
Coupled system connects, and pumping source can realize continuous-stable output, and its output can enter by controlling electric current simultaneously
Row regulation.
Further, described pumping coupling system uses optical fiber output focus lamp, and focus lamp multiplying power is 1:0.5, pump light
Transmitance ＞ 95%, operating distance is 30mm, and numerical aperture is 0.22, PMA905 interface.
Pump coupling efficiency is required higher by the Photonic Crystal Fiber Lasers that above-mentioned quantum dot is filled, and uses optical fiber output
The pump light that tail optical fiber is exported by focus lamp is focused, expands, and then coupling pump light is entered optical fiber, it is possible to achieve efficiently coupling
Close；Light beam Space Coupling after optical fiber output focus lamp shaping enters gain medium.
Further, described dichroic mirror uses plane dichroic mirror, and dichroic mirror surface is coated with the anti-reflection blooming of pump light.
In said structure, plane dichroic mirror surface coating can improve the light transmission of dichroic mirror.
Further, described reflecting mirror uses plane mirror, and mirror surface is coated with laser and is all-trans blooming.
In said structure, planar mirror surface plated film can improve the reflexive of reflecting mirror.
Goal of the invention two: present invention also offers a kind of hollow district for PbSe quantum dot being filled photonic crystal fiber
Method, it is characterised in that: configuration quantum dot aqueous solution, by syringe vent gas, by syringe needle and the photonic crystal of syringe
Optical fiber one end is bonded and sealed by colloid, and the other end of photonic crystal fiber then inserts in quantum dot aqueous solution, rotary syringe
Extraction quantum dot.
Each granularity concentration is identical and space uniform adulterates to use such scheme, the PbSe quantum dot of present invention use to be preferably
Quantum dot.The optical property of PbSe quantum dot depends primarily on size, and the present invention can be obtained by the size changing quantum dot
The spectrum of arbitrfary point in C-band.PbSe quantum dot has that band gap size is tunable, and exciton bind energy is little, luminescence generated by light amount
Sub-productivity is high, the optical characteristics such as photoresponse tuning range is big.And synthetic technology is ripe, can obtain by controlling reaction condition
Various sizes of PbSe quantum dot.
Above-mentioned band hollow porose area photonic crystal fiber is as the filling carrier of PbSe quantum dot, and this photonic crystal fiber has
The biggest more hollow porose area, the amount of the quantum dot that can fill is also many than what plain hollow photonic crystal fiber was filled, and fills out
Fill process the most convenient.Meanwhile, the cladding diameter with hollow porose area photonic crystal fiber is relatively big, after optical fiber focus lamp
Pump light can all be coupled into optical fiber, reduces loss.
The optical resonance of the space composition Photonic Crystal Fiber Lasers between above-mentioned dichroic mirror and the reflecting mirror of outfan
Chamber.The dichroic mirror of pumping end is high thoroughly to pump light, high anti-to the laser of the multiple wavelength produced.Pump light is double-colored by pumping end
Mirror enters photonic crystal fiber, excites the light of PbSe quantum dot emission specific wavelength, forms laser output after multiple oscillation.Defeated
Outgoing mirror has wider spectral range, the laser of multiple wave-length coverages can be formed vibration.
The operation principle of patent of the present invention: the light source that semiconductor laser sends focuses on through optical fiber output focus lamp, standard
It is coupled to gain medium as pump light by pumping end dichroic mirror after Zhi.PbSe quantum dot is excited by pump light and is attributed to
Producing luminescence generated by light phenomenon, the wavelength of luminescence generated by light is relevant with the size of PbSe quantum dot, when it is by laser excitation, and its photic
Light spectrum can be tuned at C-band according to the size of quantum dot；Further, due to the discrete energy levels characteristic of quantum dot, its light
Photoluminescence live width is narrower.Photonic crystal fiber is positioned in the optical resonator between dichroic mirror and reflection；These luminescence generated by lights
Multiple oscillation and amplification in optical resonator, after reaching threshold value, realized laser output by transmission end.By quantum point
Size, realizes tunable laser output with this.
Hollow for band porose area photonic crystal fiber is combined by the present invention with quantum dot, and photonic crystal fiber both can have been utilized only
Special waveguiding structure and distinctive optical property, it is also possible to utilize the spectral characteristic of quantum dot and the spy that fluorescent quantum efficiency is high
Point；PbSe quantum dot is filled in the hollow porose area photonic crystal fiber of band, then utilizes semiconductor laser to photonic crystal
Quantum dot in optical fiber carries out pumping, is finally reached the purpose producing laser.Band hollow porose area photon designed by the present invention is brilliant
Body optical fiber has the porose area diameter bigger than plain hollow photonic crystal fiber, can fill more quantum dot, at pump light
The aspect that excites than Hollow-Core Photonic Crystal Fibers, there is advantage；With PbSe quantum dot as gain media, it is filled into photonic crystal
In the hollow porose area of optical fiber, by controlling the size of quantum dot, it is possible to achieve the tuning operation of multi-wavelength.Use dichroic mirror with anti-
Penetrate mirror constitute optical linear resonator cavity, compared to Bragg grating, have simple in construction, easy and simple to handle, the advantages such as little is lost.This
The tunable quantum dot band hollow porose area Photonic Crystal Fiber Lasers of invention is in fiber optic communication, biomedicine, nano material etc.
Aspect is with a wide range of applications.
The invention will be further described below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Accompanying drawing 1 is embodied as the (generation at middle large hole of the cross sectional view with hollow porose area photonic crystal fiber for the present invention
The hollow porose area of table 40, PbSe quantum dot is filled in this hollow porose area 40)；
Accompanying drawing 2 is that the band hollow porose area Photonic Crystal Fiber Lasers structure that the specific embodiment of the invention is filled based on quantum dot is shown
It is intended to；
Laser pumping source 1, pumping coupling system 2, dichroic mirror 3, photonic crystal fiber 4, five dimension adjusts frame 5, reflecting mirror 6.
Detailed description of the invention
The specific embodiment of the present invention is that the band hollow porose area photonic crystal fiber that quantum dot is filled is adjustable as shown in Figure 1-2
Humorous laser instrument, it includes that laser pumping source 1, pumping coupling system 2, dichroic mirror 3, photonic crystal fiber 4, five dimension adjusts frame 5, anti-
Penetrate mirror 6.Specifically, semiconductor laser provides the pump light of power adjustable as pumping source, and pumping source is output continuously；Pump
Pu coupled system 2 is made up of optical fiber focus lamp；Focus lamp multiplying power is 1:0.5, pump light transmitance > 95%, operating distance is
30mm, numerical aperture is 0.22, and PMA905 interface is filled with gain medium, gain medium in photonic crystal fiber 4
Using by PbSe quantum dot, PbSe quantum dot has that band gap size is tunable, and exciton bind energy is little, luminescence generated by light quantum
Productivity is high, the optical characteristics such as photoresponse tuning range is big.Photonic crystal fiber 4 two ends be provided with preposition plane dichroic mirror 3 and after
Putting plane mirror 6, on plane dichroic mirror 3, the film of plating is blooming anti-reflection to pump light, and on plane mirror 6, the film of plating is right
Laser is all-trans blooming.
The pump light of laser pumping source 1 collimates through pumping coupling system 2, focuses on gain medium, and laser increases
Benefit medium i.e. PbSe quantum dot, the two ends of photonic crystal fiber 4 are separately fixed on five dimension high precision adjusting racks, in order to swash
The adjustment of light device；It is positioned at the preposition plane dichroic mirror 3 at photonic crystal fiber 4 two ends and rearmounted plane mirror 6, makes photon
Crystal optical fibre 4 forms the optical resonator of simple and stable between two plane mirrors；Carry hollow porose area 40 photonic crystal fiber 4 empty
After gain medium in central hole district i.e. PbSe quantum dot is irradiated by pump light, at optical resonance intracavity, light is vibrated back and forth,
Form laser after being amplified by the spontaneous emission of PbSe quantum dot, export through laser mirror 6 i.e. plane mirror 6.By adjusting
The size of the PbSe quantum dot filled in the hollow porose area of photonic crystal fiber, can export the laser of different wave length, it is achieved
The tuning operation of multiwavelength laser.
The above-mentioned device by the PbSe quantum dot filling hollow porose area of photonic crystal fiber 4 40 is mainly by syringe and a spiral
Formula litter forms；Quantum dot aqueous solution is filled into the hollow porose area of photonic crystal fiber 4 by the method utilizing syringe extraction to inject
In 40.First ensure the air-tightness of device, the air in emptying syringe, photonic crystal fiber 4 is inserted in syringe needle, utilizes AB
Photonic crystal fiber 4 is bonded and sealed by glue with syringe nozzle, and the other end of photonic crystal fiber 4 inserts in quantum dot aqueous solution,
The rotary syringe other end afterwards, extracts quantum dot.
The present invention is not limited to above-mentioned detailed description of the invention, and persons skilled in the art are according to disclosed by the invention interior
Hold, other multiple detailed description of the invention can be used to implement the present invention, or the design structure of every employing present invention and think of
Road, does simple change or change, both falls within protection scope of the present invention.
Claims (7)
1. the band hollow porose area photonic crystal fiber tunable laser filled based on quantum dot, it is characterised in that: include
Light source input, optical resonator and laser output, light source input is sequentially provided with the laser pump that can export pump light continuously
Source, Pu, pump light carrying out the pumping coupling system that collimation adjusts, laser output is provided with reflecting mirror, pumping coupling system and anti-
Penetrating and be provided with dichroic mirror and photonic crystal fiber between mirror, the space that optical resonator is surrounded by dichroic mirror and reflecting mirror is constituted,
Photonic crystal fiber is positioned in optical resonator, is filled with gain medium in photonic crystal fiber, this gain medium
For PbSe quantum dot.
The band hollow porose area photonic crystal fiber tunable laser filled based on quantum dot the most according to claim 1,
It is characterized in that: described photonic crystal fiber is fixedly installed on five dimension high precision adjusting racks, dichroic mirror and reflecting mirror position respectively
Two ends in photonic crystal fiber.
The band hollow porose area photonic crystal fiber tunable laser filled based on quantum dot the most according to claim 1,
It is characterized in that: described laser pumping source uses semiconductor laser.
4. swash according to the band hollow porose area photonic crystal fiber based on quantum dot filling described in claim 1 or 2 or 3 is tunable
Light device, it is characterised in that: described pumping coupling system uses optical fiber output focus lamp, and focus lamp multiplying power is 1:0.5, and pump light is saturating
Crossing rate ＞ 95%, operating distance is 30mm, and numerical aperture is 0.22, PMA905 interface.
The band hollow porose area photonic crystal fiber tunable laser filled based on quantum dot the most according to claim 1,
It is characterized in that: described dichroic mirror uses plane dichroic mirror, and dichroic mirror surface is coated with the anti-reflection blooming of pump light.
The band hollow porose area photonic crystal fiber tunable laser filled based on quantum dot the most according to claim 1,
It is characterized in that: described reflecting mirror uses plane mirror, and mirror surface is coated with laser and is all-trans blooming.
7. the method being used for PbSe quantum dot is filled the hollow district of photonic crystal fiber, it is characterised in that: configuration quantum
Point aqueous solution, by syringe vent gas, is bonded and sealed the syringe needle of syringe by colloid with photonic crystal fiber one end, light
The other end of photonic crystal fiber then inserts in quantum dot aqueous solution, rotary syringe extraction quantum dot.
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| CN108613956A (en) * | 2018-05-09 | 2018-10-02 | 中国工程物理研究院激光聚变研究中心 | A kind of gas-detecting device, sensor, photonic crystal and preparation method thereof |
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| CN113376136A (en) * | 2021-06-18 | 2021-09-10 | 北京航空航天大学 | Fluorescence detection system and method based on double-core photonic crystal fiber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108613956A (en) * | 2018-05-09 | 2018-10-02 | 中国工程物理研究院激光聚变研究中心 | A kind of gas-detecting device, sensor, photonic crystal and preparation method thereof |
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| CN109787076A (en) * | 2019-03-12 | 2019-05-21 | 中国工程物理研究院激光聚变研究中心 | Thermotropic waveguiding structure laser and laser amplifier |
| CN109787076B (en) * | 2019-03-12 | 2024-04-19 | 中国工程物理研究院激光聚变研究中心 | Thermally induced waveguide structure laser and laser amplifier |
| CN113376136A (en) * | 2021-06-18 | 2021-09-10 | 北京航空航天大学 | Fluorescence detection system and method based on double-core photonic crystal fiber |
| CN113376733A (en) * | 2021-06-28 | 2021-09-10 | 南开大学 | Quantum dot filled air cladding hollow-core ZBLAN optical fiber and intermediate infrared single-mode laser |
| CN113376733B (en) * | 2021-06-28 | 2022-07-29 | 南开大学 | Air-clad hollow-core ZBLAN optical fiber filled with quantum dots and intermediate infrared single-mode laser |
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