CN205565282U - Tunable narrow linewidth lasers output device based on micro flutes optic fibre - Google Patents
Tunable narrow linewidth lasers output device based on micro flutes optic fibre Download PDFInfo
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- CN205565282U CN205565282U CN201620291657.2U CN201620291657U CN205565282U CN 205565282 U CN205565282 U CN 205565282U CN 201620291657 U CN201620291657 U CN 201620291657U CN 205565282 U CN205565282 U CN 205565282U
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- 239000000835 fiber Substances 0.000 title claims abstract description 43
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 239000013307 optical fiber Substances 0.000 claims description 42
- 230000004323 axial length Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 8
- 238000007906 compression Methods 0.000 abstract description 8
- 238000009825 accumulation Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003361 heart septum Anatomy 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005459 micromachining Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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Abstract
The utility model discloses a tunable narrow linewidth lasers output device based on micro flutes optic fibre. The utility model is suitable for a tunable narrow linewidth fiber laser field to but gain medium - is regarded as as wavelength tuning device with the er -doped fiber to the tunable filter ware, has utilized micro flutes optic fibre to realize rayleigh gain accumulation, carries out the live width compression, has realized the output of tunable narrow linewidth lasers. The utility model discloses can be applied to fields such as optical communication, gaseous sensing, environmental monitoring, have simple structure, advantage such as with low costs.
Description
Technical field
This utility model belongs to laser technology field, particularly to a kind of based on micro groove optical fiber adjustable
Humorous narrow-linewidth laser output device.
Background technology
Narrow cable and wide optical fiber laser is at fiber optic communication, Fibre Optical Sensor, military affairs, industrial processes, optical information
The fields such as reason have broad application prospects.Particularly tunable narrow-linewidth optical fiber laser is at wavelength-division multiplex
Fiber optic communication and optical fiber sensing system play important role.
The method of existing formation narrow linewidth single longitudinal mode laser bundle mainly has short cavity, saturated absorbing body, annular chamber
Etc. method, but mostly have that structure is complicated, volume is bigger, with high costs, linewidth compression effect is undesirable
Defect, limit the application of tunable narrow-linewidth single longitudinal mode laser bundle.
It is theoretical it has been proved that Rayleigh scattering is a kind of effective linewidth compression mechanism, if Rayleigh can be utilized
Scattering realizes laser linewidth compression, and the structure of super-narrow line width laser instrument will be simplified.Under normal circumstances,
Brillouin scattering and Rayleigh scattering exist the most simultaneously, and the gain system that ordinary optic fibre is to Brillouin scattering
Number is high several orders of magnitude than Rayleigh scattering gain coefficient, and Brillouin scattering has negative shadow to linewidth compression
Ring, the most effectively suppress Brillouin scattering, it is achieved Rayleigh gain accumulation is to forming tunable narrow-linewidth Dan Zong
Mould laser beam is significant.
Summary of the invention
This utility model is aiming at the deficiencies in the prior art, it is proposed that a kind of based on micro groove optical fiber can
Tuning narrow-linewidth laser output device.
This utility model include an output more than the 980nm pump laser of 100mW, one
980nm/1550nm wavelength division multiplexer, the Er-doped fiber of a segment length 2 meters to 10 meters, three ports
Circulator, adjustable narrow band filter, three port circulator, micro groove optical fiber, one
Variable optical attenuator, Sagnac-ring, a 1*2 photo-coupler.
The port of pump laser is connected with the 1st fiber port of wavelength division multiplexer, the of wavelength division multiplexer
2 ports are connected with one end optical fiber of Er-doped fiber；The other end of Er-doped fiber and adjustable narrow band filter
One end optical fiber connects, and the other end of adjustable narrow band filter and the 1st fiber port of three port circulators are even
Connecing, the 2nd port of three port circulators is connected with one end optical fiber of micro groove optical fiber, micro groove optical fiber
Other end optical fiber is connected with variable optical attenuator, and the variable optical attenuator other end is connected with Sagnac-ring；
3rd port of three port circulators is connected with the input end fiber of 1*2 end bonder, 1*2 end bonder
The first outfan be connected with the 3rd fiber port of wavelength division multiplexer, 1*2 end bonder the 2nd output
Hold the outfan as super-narrow line width laser.
Described micro groove optical fiber is the single-mode fiber inscribed and have symmetrical grooves, and symmetrical grooves has many in the axial direction
Right, each depth of groove is 6～7 microns.
Furtherly, the axial length of described single groove is 1.8～2cm, adjacent two grooves axial
Middle heart septum 4.5～6m, the minimum diameter of groove with the external diameter numeric ratio of single-mode fiber is
24:25～18:25.
This utility model is applicable to tunable narrow-linewidth optical fiber laser field, make use of micro groove optical fiber real
Existing Rayleigh gain accumulation, carries out linewidth compression, can be compatible with other optical fibre devices.
Accompanying drawing explanation
Fig. 1 a is structural representation of the present utility model；
Fig. 1 b is the structural representation of micro groove optical fiber；
Fig. 2 is the spectrogram exporting different wave length narrow-linewidth laser in this utility model embodiment.
Detailed description of the invention
As illustrated in figs. ia and ib, the present embodiment includes 1, ripple of a 980nm pump laser
2, one section of Er-doped fiber of division multiplexer, 4, three port circulator of 3, adjustable narrow band filter
5,6, variable optical attenuator of one section of micro groove optical fiber, 8,1*2 of 7, Sagnac-ring
Photo-coupler 9.
Micro groove optical fiber 6 in the present embodiment is made through femtosecond laser parallel micromachining by general single mode fiber 10
Form, inscribe two deep symmetrical grooves 6-1 of 6～7 microns with femtosecond laser on single-mode fiber surface, logical
Cross and repeatedly inscribe operation, general single mode fiber is formed multipair micro groove district.Described micro groove optical fiber connects
Enter in laser instrument, make the cavity length of laser instrument equal to or more than 110m, many on general single mode fiber
Individual micro groove district can effectively suppress Brillouin scattering, meets Rayleigh scattering and accumulates in a large number, it is achieved laser linewidth
Compression effectiveness.
In order to make light loss in micro groove optical fiber and the inhibition of brillouin gain be obtained relatively
Good balance, the parameter of micro groove optical fiber is set to: the axial length in single micro groove district is
1.8～2cm, each micro groove district 6-1 is spaced set, the axial centre in adjacent two pairs of micro groove districts it
Between be spaced (see scope shown in labelling M in Fig. 1 b) 4.5～6m.Minimum diameter in micro groove district 6-1
And the external diameter ratio of general single mode fiber is between 24:25～18:25.
The port of 980nm pump laser 1 is connected with the 1st fiber port of wavelength division multiplexer 2, wavelength-division
2nd port of multiplexer 2 is connected with one end optical fiber of Er-doped fiber 3；The other end of Er-doped fiber 3 with
One end optical fiber of adjustable narrow band filter 4 connects, the other end of adjustable narrow band filter 4 and three port rings
1st fiber port of shape device 5 connects, the 2nd port of three port circulators 5 and micro groove optical fiber 6
One end optical fiber connects, and the other end optical fiber of micro groove optical fiber 6 is connected with variable optical attenuator 7, can darkening
The other end of attenuator 7 is connected with Sagnac-ring 8；3rd port and 1*2 of three port circulators 5
The input end fiber of end bonder 9 connects, the first outfan of 1*2 end bonder 9 and wavelength division multiplexer 2
The 3rd fiber port connect, defeated as super-narrow line width laser of the 2nd outfan of 1*2 end bonder 9
Go out end.
The work process of this device: opening 980nm pump laser 1, the 980nm laser of output passes through
Wavelength division multiplexer 2 enters Er-doped fiber 3, and Er-doped fiber 3 absorbs 980nm laser, thus provides one
Wideband light source；Adjustable narrow band filter 4 is wavelength selective elements, selects through adjustable narrow band filter 4
Light injects micro groove optical fiber 6, variable optical attenuator 7 and Sa by the 2nd port of three port circulators 5
Lattice nanogram ring 8, the 3rd port of three port circulators 5 and 1*2 end bonder 9, wavelength division multiplexer 2
3rd port forms complete loop laser chamber.Sagnac-ring 8 and variable optical attenuator 7 are micro groove
Optical fiber 6 provides a seed light the faintest, and the intensity of seed light is controlled by variable optical attenuator 6
System, in order to avoid the backward Rayleigh signal of narrow linewidth is submerged, thus increases the probability that back scattering produces,
The Rayleigh scattering light of narrow linewidth circulates in annular chamber, ultimately forms laser concussion, from 1*2 end bonder
2nd outfan of 8 outwards exports narrow-linewidth laser signal, can be defeated by regulation adjustable narrow band filter 4
Go out the narrow-linewidth laser of different wave length.Fig. 2 be in this utility model embodiment output wavelength from
The spectrogram of 1549.57nm to 1553.93nm continuously adjustable narrow line wide laser.The live width of Output of laser
Less than 10kHz.
This utility model is applicable to tunable narrow-linewidth optical fiber laser field, using tunable optic filter as
Wavelength tuning device, using Er-doped fiber as gain media, make use of micro groove optical fiber to realize Rayleigh gain
Accumulation, carries out linewidth compression, it is achieved that tunable narrow-linewidth laser exports.This utility model can be applied
In fields such as optic communication, gas sensing, environmental monitorings, there is simple in construction, low cost and other advantages.
Claims (2)
1. multi-wavelength narrow-linewidth laser output device based on micro groove optical fiber, it is characterised in that: include one
The output 980nm pump laser more than 100mW, a 980nm/1550nm wavelength division multiplexer, one
The Er-doped fiber that segment length is 2 meters to 10 meters, three port circulators, adjustable narrow band filter,
Individual three port circulators, micro groove optical fiber, variable optical attenuator, Sagnac-ring, one
Individual 1*2 photo-coupler；
The port of pump laser is connected with the 1st fiber port of wavelength division multiplexer, the 2nd of wavelength division multiplexer
Port is connected with one end optical fiber of Er-doped fiber；The other end of Er-doped fiber and one end of adjustable narrow band filter
Optical fiber connects, and the other end of adjustable narrow band filter and the 1st fiber port of three port circulators connect, and three
2nd port of port circulator is connected with one end optical fiber of micro groove optical fiber, the other end light of micro groove optical fiber
Fibre is connected with variable optical attenuator, and the variable optical attenuator other end is connected with Sagnac-ring；Three port annulars
3rd port of device is connected with the input end fiber of 1*2 end bonder, the first outfan of 1*2 end bonder with
3rd fiber port of wavelength division multiplexer connects, and the 2nd outfan of 1*2 end bonder is as super-narrow line width laser
Outfan；
Described micro groove optical fiber is the single-mode fiber inscribed and have symmetrical grooves, and symmetrical grooves has multipair in the axial direction,
Each depth of groove is 6～7 microns.
Multi-wavelength narrow-linewidth laser output device based on micro groove optical fiber the most according to claim 1,
It is characterized in that: the axial length of described single groove is 1.8～2cm, the axial centre of adjacent two grooves
Interval 4.5～6m, the minimum diameter of groove is 24:25～18:25 with the external diameter numeric ratio of single-mode fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620291657.2U CN205565282U (en) | 2016-04-07 | 2016-04-07 | Tunable narrow linewidth lasers output device based on micro flutes optic fibre |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620291657.2U CN205565282U (en) | 2016-04-07 | 2016-04-07 | Tunable narrow linewidth lasers output device based on micro flutes optic fibre |
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| CN205565282U true CN205565282U (en) | 2016-09-07 |
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| CN201620291657.2U Expired - Fee Related CN205565282U (en) | 2016-04-07 | 2016-04-07 | Tunable narrow linewidth lasers output device based on micro flutes optic fibre |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870392A (en) * | 2016-09-27 | 2018-04-03 | 福州高意光学有限公司 | A kind of preparation method of fiber coupler |
| CN115411601A (en) * | 2022-08-11 | 2022-11-29 | 中国工程物理研究院应用电子学研究所 | Laser frequency selection module based on super surface structure |
-
2016
- 2016-04-07 CN CN201620291657.2U patent/CN205565282U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870392A (en) * | 2016-09-27 | 2018-04-03 | 福州高意光学有限公司 | A kind of preparation method of fiber coupler |
| CN115411601A (en) * | 2022-08-11 | 2022-11-29 | 中国工程物理研究院应用电子学研究所 | Laser frequency selection module based on super surface structure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160907 Termination date: 20180407 |
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| CF01 | Termination of patent right due to non-payment of annual fee |