CN208849226U - A kind of all -fiber vortex light laser based on orbital angular momentum mode resonances - Google Patents
A kind of all -fiber vortex light laser based on orbital angular momentum mode resonances Download PDFInfo
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- CN208849226U CN208849226U CN201821471899.5U CN201821471899U CN208849226U CN 208849226 U CN208849226 U CN 208849226U CN 201821471899 U CN201821471899 U CN 201821471899U CN 208849226 U CN208849226 U CN 208849226U
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Abstract
The utility model discloses a kind of all -fiber vortex light laser based on orbital angular momentum mode resonances, with ring cavity structure, including narrow linewidth pump laser, image intensifer, orbital angular momentum mode generator, the first Polarization Controller, optical fiber circulator, fiber coupler, the second Polarization Controller and vortex optical fiber；Wherein orbital angular momentum mode generator realizes that fundamental transverse mode orients the orbital angular momentum mode for being converted to particular topology lotus number in vortex optical fiber in single mode optical fiber；Fiber coupler is able to achieve a vortex optical fiber middle orbit angular momentum mode to the directional couple of another vortex optical fiber middle orbit angular momentum mode；Vortex optical fiber is the optical fiber for supporting the transmission of orbital angular momentum mode stable；Based on Brillouin's non-linear gain of annular chamber inside vortex optical fiber, realizes that orbital angular momentum mode is amplified in intracavitary resonance, export vortex laser.The utility model uses all optical fibre structure, and it is high to export good vortex ray laser stability, line width, orbital angular momentum mode purity.
Description
Technical field
The utility model relates to optical fiber lasers, technical field of photo communication, in particular to a kind of to be based on orbital angular momentum mould
The all -fiber vortex light laser of formula resonance.
Background technique
Vortex beams are the annular hollow light beams that center intensity is zero with screw type phase distribution, in optical field distribution
Contain phase factorexp(ilφ), each photon carries in light beamlOrbital angular momentum,lReferred to as topological charge number.Different topology
Lotus numberlOrbital angular momentum mode be orthogonal, be frequency, amplitude, phase and polarization state four dimensions except conventional planar wave
Therefore vortex beams are used for optical communication field by a new dimension in addition, by the great capacity and frequency for improving communication system
Spectrum efficiency.Further, since the unique spatial-intensity of vortex beams and phase distribution, in Fibre Optical Sensor, quantum and nanocomposite optical, light
It learns the fields such as manipulation, super-resolution imaging and laser material processing to be also with a wide range of applications, causes people increasingly
More interest.
Under the promotion of these applications, researchers propose many methods to obtain vortex ray laser.Currently, vortex light
The producing method of laser can be divided into two classes: the first kind is the laser that mode conversion is carried out based on phase optical element outside chamber,
Its structure is mainly by a mature non-vortex light laser and for phase light outside the chamber of orbital angular momentum mode conversion
Element composition, wherein common phase element includes: spiral phase plate, holographic phase plate, spatial light modulator etc..Such laser
Device is often limited to the material property of phase light element itself, it is more difficult to realize integrated design, the conversion with laser resonator
Low efficiency, single wavelength can only be carried out conversion and high energy laser be easy conversion element is damaged.It is another kind of, it is base
In the direct oscillation that laser transverse mode selects is generated vortex light vortex laser (number of patent application: 201510596176.2),
Its main way of realization has annular pump, point defect reflecting mirror or insertion phase element etc. in resonant cavity.This kind of laser is all
It is the solid state laser of occlusion body element, laser system is complicated, and cavity loss is big, and laser threshold is high.
Compared with volume elements part solid state laser, full-optical-fiber laser is at low cost, flexibility is good, stability is good, volume
The advantages that small, high-efficient, but the report of current all -fiber vortex light laser is considerably less.It discloses a kind of based on mode conversion coupling
The optical vortex optical fiber laser of conjunction (number of patent application: 201610360609.9), uses all optical fibre structure to realize that vortex swashs
Light output, but in intracavitary direct resonance be still the fundamental transverse mode in optical fiber, it is not orbital angular momentum mode, passes through insertion laser
The intracavitary single mode optical fiber of device-less fundamental mode optical fibre coupler produces and exports device as optical vortex.Since the fiber coupler produces
Raw mode is linear polarization (LP) mode of degeneracy, it is still necessary to additional to apply stress and adjustment polarization state to realize vortex beams
Generation, therefore the full-optical-fiber laser generate vortex beams be limited to completely use single mode optical fiber-less fundamental mode optical fibre coupling
Device, beam quality is poor, and mode purity is low.Furthermore the less fundamental mode optical fibre used in this utility model can not support orbital angular momentum mould
Formula stablizes transmission, causes the vortex beams stability generated poor.Therefore, it realizes a kind of based on the direct resonance of orbital angular momentum mode
Full-optical-fiber laser scheme have great importance with the vortex laser for obtaining high-purity, high stability.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the prior arts and deficiency provide a kind of based on orbital angular momentum mould
The all -fiber vortex light laser of formula resonance is based on Brillouin's nonlinear effect, to support orbital angular momentum mode stable to transmit
Vortex optical fiber be gain media, the direct resonance amplification of intracavitary orbital angular momentum mode is realized, directly in laser output
Obtain the vortex laser of height mode purity.In addition, the laser also has compact-sized, easy, the cheap, stability of adjusting
The advantages of high aspect.
The purpose of this utility model is realized at least through one of technical solution below.
A kind of all -fiber vortex light laser based on orbital angular momentum mode resonances, including narrow linewidth pump laser,
Image intensifer, orbital angular momentum mode generator, the first Polarization Controller, optical fiber circulator, fiber coupler, the second polarization control
Device and vortex optical fiber processed；
Wherein, the orbital angular momentum mode generator includes first port, second port, third port and the 4th end
Mouthful；The optical fiber circulator includes first port, second port and third port；The fiber coupler include first port,
Second port, third port and the 4th port；The narrow linewidth pump laser is connected to image intensifer；The image intensifer
It is connected to the first port of orbital angular momentum mode generator, the second port of the orbital angular momentum mode generator is through first
Polarization Controller is connected to the first port of optical fiber circulator；The second port of the optical fiber circulator is connected to fiber coupler
First port；The second port of the fiber coupler is connected to optical fiber circulator through the second Polarization Controller and vortex optical fiber
Third port annular chamber is constituted with this；The third port of the fiber coupler exports laser.
Preferably, the narrow linewidth pump laser selects narrow linewidth semiconductor laser or narrow linewidth optical-fiber laser
Device, line width are lower than 1MHz, single longitudinal mode operating.
Preferably, the image intensifer selects high-gain rare-earth-doped fiber amplifier (such as Erbium-doped fiber amplifier
Device) or corresponding wave band semiconductor optical amplifier.
Preferably, the orbital angular momentum mode generator is 2 made from single mode optical fiber and vortex optical fiber fused tapering
The track of particular topology lotus number in the fundamental transverse mode and vortex optical fiber in single mode optical fiber may be implemented in × 2 model selection coupler
Between angular momentum mode M8003 line coupling, first and the 4th port be single mode optical fiber, second and third port be vortex optical fiber.
Preferably, the optical fiber circulator, for vortex optical fiber circulator, the tail optical fiber of three ports is vortex optical fiber.
Preferably, the fiber coupler is intracavity modal coupled apparatus, is drawn for vortex optical fiber and vortex fiber fuse
The coupler of cone obtained 2 × 2, may be implemented in a vortex optical fiber middle orbit angular momentum mode and another vortex optical fiber
Directional couple between the orbital angular momentum mode of same topological charge number, the tail optical fiber of four ports are vortex optical fiber.
Preferably, the vortex optical fiber is the optical fiber for supporting the transmission of orbital angular momentum mode stable, the track angle of support
Momentum Model number is greater than 2, and length is greater than 20m.
The vortex light laser of the utility model is ring cavity structure, includes an optical fiber circulator and one in annular chamber
Fiber coupler, the interior connection optical fiber of entire annular chamber is vortex optical fiber.The utility model is excited in cloth using in vortex optical fiber
Deep scattering effect realizes that orbital angular momentum mode is amplified in annular chamber interior resonance, generates the vortex for stablizing high-purity at room temperature
Laser.
The utility model compared with prior art, is had the following advantages and beneficial effects:
1, the utility model using the orbital angular momentum mode generator based on vortex optical fiber as laser resonant cavity outside
The orbital angular momentum mode purity of mode converter part, generation is high, and loss is small, high-efficient.
2, the utility model is based on Brillouin's non-linear gain, realizes the intracavitary direct resonance amplification of orbital angular momentum mode,
The vortex zlasing mode purity is high of acquisition.
3, the utility model is using vortex optical fiber as gain media, it can be ensured that orbital angular momentum mode is in resonant process
Middle holding is stablized.
4, the utility model uses all optical fibre structure, and structure is simple, at low cost, is easy to fibre system and integrates, exports laser
Stability is good, line width, improves the practicability and reliability of vortex laser.
Detailed description of the invention
Fig. 1 is the schematic diagram of all -fiber vortex light laser of the embodiment based on orbital angular momentum mode resonances.
Fig. 2 is the power graph of laser in embodiment.
Fig. 3 is the output laser far field surface of intensity distribution.
In figure: 1- narrow linewidth pump laser；2- image intensifer；3- orbital angular momentum mode generator；4- first is polarized
Controller；5- optical fiber circulator；6- fiber coupler；The second Polarization Controller of 7-；8- vortex optical fiber.
Specific embodiment
The present invention will be further described in detail with reference to the embodiments and the accompanying drawings, but the implementation of the utility model
Mode is without being limited thereto.
Embodiment 1
As shown in Figure 1, a kind of all -fiber vortex light laser based on orbital angular momentum mode resonances of this example, including
Narrow linewidth pump laser 1, image intensifer 2, orbital angular momentum mode generator 3, the first Polarization Controller 4, optical fiber circulator
5, fiber coupler 6, the second Polarization Controller 7 and vortex optical fiber 8.
In the present embodiment, the narrow linewidth pump laser 1, the narrow linewidth semiconductor for selecting C-band power adjustable humorous
Laser or narrow cable and wide optical fiber laser, line width are lower than 1MHz, and tail optical fiber is single mode optical fiber.
The image intensifer 2 selects high-gain erbium-doped fiber amplifier or 1550nm wave band semiconductor optical amplifier, tail optical fiber
For single mode optical fiber.
The orbital angular momentum mode generator 3 is made from single mode optical fiber and vortex optical fiber fused tapering 2 × 2 mould
Formula selects coupler, and the orbital angular momentum mould of particular topology lotus number in the fundamental transverse mode and vortex optical fiber in single mode optical fiber may be implemented
M8003 line coupling between formula, first port 301 and the 4th port 304 are single mode optical fiber, second port 302 and third port
303 be vortex optical fiber.
The optical fiber circulator 5, for vortex optical fiber circulator, first port 501, second port 502 and third port 503
Tail optical fiber be vortex optical fiber.
The fiber coupler 6 can be with for made from vortex optical fiber and vortex optical fiber fused tapering 2 × 2 coupler
Realize the orientation in vortex optical fiber middle orbit angular momentum mode and vortex optical fiber between the orbital angular momentum mode of same topological charge number
The splitting ratio of coupling, first port 601 and third port 603 is 90:10, the splitting ratio of second port 602 and the 4th port 604
It also is 90:10, the tail optical fiber of four ports 601,602,603 and 604 is vortex optical fiber.
The vortex optical fiber 8 is the optical fiber for supporting the orbital angular momentum mode stable transmission of 1550nm wave band, and support is opened up
Flutter the orbital angular momentum mode that lotus number is+1 and -1, length 600m.
In the present embodiment, the laser that narrow linewidth pump laser 1 exports carries out power amplification, amplification by image intensifer 2
The first port 301 of high power pump light injection orbit angular momentum mode generator 3 afterwards, through orbital angular momentum mode generator
After 3, pump light is changed into the second end of orbital angular momentum mode generator 3 by the fundamental transverse mode of single mode optical fiber in first port 301
The orbital angular momentum mode of the particular topology lotus number (+1 or -1) of 302 mesoscale eddies optical fiber of mouth, the orbital angular momentum mode pump of generation
The first port 501 of Pu light injection fibre circulator 5 after the first Polarization Controller 4, then the second port from optical fiber circulator 5
The first port 601 of 502 injection fibre couplers 6, after fiber coupler 6,90% orbital angular momentum mode pump light is through
It is transmitted in vortex optical fiber 8 after two Polarization Controllers 7, stimulated Brillouin scattering effect occurs, generates the track angle of reverse transfer
Momentum Model Brillouin's stokes light.
When pumping light power is more than Brillouin threshold in annular chamber, Brillouin's Stokes for generating in vortex optical fiber 8
Light successively the first port 601 through fiber coupler 6, the second port 502 of optical fiber circulator 5, optical fiber circulator 5 third end
Mouth 503 is again introduced into vortex optical fiber 8, and oscillation is formed in resonant cavity, that is, is generated one and moved down single order cloth than pumping light frequency
In deep Stokes laser, this Brillouin's Stokes laser exports through the third port 603 of fiber coupler 6, i.e. acquisition whirlpool
Revolve laser.The power curve of the laser is as shown in Fig. 2, the far-field intensity distribution of the vortex laser generated is as shown in Figure 3.
First between the second port 302 of orbital angular momentum mode generator 3 and the first port 501 of optical fiber circulator 5
The polarization of the second Polarization Controller 7 co- controlling pump light and Brillouin's pump light on Polarization Controller 4 and vortex optical fiber 8
State, to obtain maximum Brillouin's non-linear gain.Since the connection optical fiber in annular chamber is vortex optical fiber, it is ensured that rail
Road angular momentum mode pump light and the retrograde orbit angular momentum mode stokes light of generation stablize transmission, based on being excited in cloth
Deep scattering effect realizes the direct resonance amplification of intracavitary orbital angular momentum schema, to obtain the vortex of height mode purity
Laser.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by above-mentioned
The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing
In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.
Claims (7)
1. a kind of all -fiber vortex light laser based on orbital angular momentum mode resonances characterized by comprising narrow linewidth pump
Pu laser, image intensifer, orbital angular momentum mode generator, the first Polarization Controller, optical fiber circulator, fiber coupler,
Second Polarization Controller and vortex optical fiber；
The orbital angular momentum mode generator includes first port, second port, third port and the 4th port；
The optical fiber circulator includes first port, second port and third port；
The fiber coupler includes first port, second port, third port and the 4th port；
The narrow linewidth pump laser is connected to image intensifer；The image intensifer is connected to the generation of orbital angular momentum mode
The second port of the first port of device, the orbital angular momentum mode generator is connected to fiber annular through the first Polarization Controller
The first port of device；The second port of the optical fiber circulator is connected to the first port of fiber coupler；The fiber coupling
The third port that the second port of device is connected to optical fiber circulator through the second Polarization Controller and vortex optical fiber is constituted annular with this
Chamber；The third port of the fiber coupler exports laser.
2. all -fiber vortex light laser according to claim 1 based on orbital angular momentum mode resonances, feature exist
In the narrow linewidth pump laser selects narrow linewidth semiconductor laser or narrow cable and wide optical fiber laser, line width to be lower than
1MHz, single longitudinal mode operating.
3. all -fiber vortex light laser according to claim 1 based on orbital angular momentum mode resonances, feature exist
In the image intensifer selects high-gain rare-earth-doped fiber amplifier or semiconductor optical amplifier.
4. all -fiber vortex light laser according to claim 1 based on orbital angular momentum mode resonances, feature exist
In, the orbital angular momentum mode generator, be single mode optical fiber and vortex optical fiber as made from fused biconical taper 2 × 2 mould
Formula selects coupler, realizes in the fundamental transverse mode and vortex optical fiber in single mode optical fiber between the orbital angular momentum mode of particular topology lotus number
M8003 line coupling, first and the 4th port be single mode optical fiber, second and third port be vortex optical fiber.
5. all -fiber vortex light laser according to claim 1 based on orbital angular momentum mode resonances, feature exist
In the optical fiber circulator, for the circulator based on vortex optical fiber, the tail optical fiber of three ports is vortex optical fiber.
6. all -fiber vortex light laser according to claim 1 based on orbital angular momentum mode resonances, feature exist
In the fiber coupler is able to achieve one for made from vortex optical fiber and vortex optical fiber fused tapering 2 × 2 coupler
In root vortex optical fiber middle orbit angular momentum mode and another vortex optical fiber between the orbital angular momentum mode of same topological charge number
Directional couple, the tail optical fiber of four ports of fiber coupler are vortex optical fiber.
7. all -fiber vortex light laser according to claim 1 based on orbital angular momentum mode resonances, feature exist
In the vortex optical fiber is the optical fiber for supporting the orbital angular momentum mode stable of corresponding wave band to transmit, the track angular motion of support
It measures pattern count and is greater than 2, length is greater than 20m.
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| CN201821471899.5U CN208849226U (en) | 2018-09-07 | 2018-09-07 | A kind of all -fiber vortex light laser based on orbital angular momentum mode resonances |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066279A (en) * | 2018-09-07 | 2018-12-21 | 华南理工大学 | A kind of all -fiber vortex light laser based on orbital angular momentum mode resonances |
| CN110459940A (en) * | 2019-07-30 | 2019-11-15 | 华南理工大学 | A kind of all -fiber Brillouin single-frequency vortex laser |
| CN110459941A (en) * | 2019-07-30 | 2019-11-15 | 华南理工大学 | A kind of 8 word chamber orbital angular momentum mode mode locked fiber lasers |
| CN110544869A (en) * | 2019-07-30 | 2019-12-06 | 华南理工大学 | Single longitudinal mode Brillouin fiber laser with orbital angular momentum mode direct resonance |
| CN110556690A (en) * | 2019-07-30 | 2019-12-10 | 华南理工大学 | All-fiber vortex optical rotation mode-locking annular cavity laser |
| CN110556691A (en) * | 2019-07-30 | 2019-12-10 | 华南理工大学 | Short linear cavity orbital angular momentum mode single-frequency fiber laser |
| CN114964328A (en) * | 2022-05-10 | 2022-08-30 | 南京师范大学 | All-fiber angular momentum interference sensing measurement system and method based on spiral grating |
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2018
- 2018-09-07 CN CN201821471899.5U patent/CN208849226U/en not_active Withdrawn - After Issue
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066279A (en) * | 2018-09-07 | 2018-12-21 | 华南理工大学 | A kind of all -fiber vortex light laser based on orbital angular momentum mode resonances |
| CN109066279B (en) * | 2018-09-07 | 2024-03-26 | 华南理工大学 | All-fiber vortex optical laser based on orbital angular momentum mode resonance |
| CN110459940A (en) * | 2019-07-30 | 2019-11-15 | 华南理工大学 | A kind of all -fiber Brillouin single-frequency vortex laser |
| CN110459941A (en) * | 2019-07-30 | 2019-11-15 | 华南理工大学 | A kind of 8 word chamber orbital angular momentum mode mode locked fiber lasers |
| CN110544869A (en) * | 2019-07-30 | 2019-12-06 | 华南理工大学 | Single longitudinal mode Brillouin fiber laser with orbital angular momentum mode direct resonance |
| CN110556690A (en) * | 2019-07-30 | 2019-12-10 | 华南理工大学 | All-fiber vortex optical rotation mode-locking annular cavity laser |
| CN110556691A (en) * | 2019-07-30 | 2019-12-10 | 华南理工大学 | Short linear cavity orbital angular momentum mode single-frequency fiber laser |
| CN110459941B (en) * | 2019-07-30 | 2021-01-19 | 华南理工大学 | 8-shaped cavity orbital angular momentum mode-locked fiber laser |
| CN110556691B (en) * | 2019-07-30 | 2021-07-20 | 华南理工大学 | Short linear cavity orbital angular momentum mode single-frequency fiber laser |
| CN110556690B (en) * | 2019-07-30 | 2021-10-26 | 华南理工大学 | All-fiber vortex optical rotation mode-locking annular cavity laser |
| CN114964328A (en) * | 2022-05-10 | 2022-08-30 | 南京师范大学 | All-fiber angular momentum interference sensing measurement system and method based on spiral grating |
| CN114964328B (en) * | 2022-05-10 | 2023-12-05 | 南京师范大学 | All-fiber angular momentum interferometry sensing measurement system and method based on spiral grating |
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