CN205565281U - Multi -wavelength narrow linewidth lasers output device based on micro flutes optic fibre - Google Patents
Multi -wavelength narrow linewidth lasers output device based on micro flutes optic fibre Download PDFInfo
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- CN205565281U CN205565281U CN201620290571.8U CN201620290571U CN205565281U CN 205565281 U CN205565281 U CN 205565281U CN 201620290571 U CN201620290571 U CN 201620290571U CN 205565281 U CN205565281 U CN 205565281U
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Abstract
The utility model discloses a multi -wavelength narrow linewidth lasers output device based on micro flutes optic fibre. The utility model is suitable for a multi -wavelength narrow linewidth fiber laser field, the fiber grating who adopts a plurality of different center wavelength selects the laser of a plurality of different wavelength, utilizes micro flutes optic fibre to realize rayleigh gain accumulation, carries out the live width compression, realizes the output of multi -wavelength narrow linewidth lasers. The utility model discloses can be applied to optical communication, light sensing etc. Field, have stable in structure, advantage such as with low costs.
Description
Technical field
This utility model belongs to laser technology field, particularly to a kind of multi-wavelength based on micro groove optical fiber
Narrow-linewidth laser output device.
Background technology
Along with the development of high capacity fiber communication network is with ripe, wavelength-division multiplex technique has become as distance and leads to
Letter main line and the mainstream technology of optical-fiber network.Multi-wavelength optical fiber laser is as the important light in wavelength routed networks
Source is widely studied.Multi-wavelength optical fiber laser has stable performance, output height, Yi Yuguang simultaneously
The advantages such as fiber communication system compatible, have extensively at aspects such as optical fiber sensing system, optic test, spectroscopy
Prospect.The research of multi-wavelength optical fiber laser at present is concentrated mainly on high power and narrow linewidth two aspect, many
The research of wavelength narrow cable and wide optical fiber laser is increasingly paid attention to.
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 lacks
Fall into, limit the application of multi-wavelength narrow-linewidth 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 to dissipate
Penetrating and realize laser linewidth compression, the structure of multi-wavelength narrow linewidth laser will be simplified.Under normal circumstances,
Brillouin scattering and Rayleigh scattering exist the most simultaneously, and the gain coefficient that ordinary optic fibre is to Brillouin scattering
High several orders of magnitude than Rayleigh scattering gain coefficient, and Brillouin scattering has negative effect to linewidth compression,
The most effectively suppress Brillouin scattering, it is achieved Rayleigh gain accumulation has forming multi-wavelength narrow-linewidth laser bundle
Significance.
Summary of the invention
This utility model is aiming at the deficiencies in the prior art, it is proposed that a kind of many ripples based on micro groove optical fiber
Long 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 port rings
Shape device, a centre wavelength are λ1Fiber grating, variable optical attenuator, Polarization Controller,
One centre wavelength is λ2Fiber grating, a centre wavelength be λ3Fiber grating, a 1*2 coupling
Clutch.
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 the 1st end of three port circulators
Mouth optical fiber connects, and the 2nd port of three port circulators is connected with one end optical fiber of micro groove optical fiber, micro groove
The other end optical fiber of optical fiber and centre wavelength are λ1One end optical fiber of fiber grating connect, centre wavelength is λ1
The other end of fiber grating be connected with one end optical fiber of variable optical attenuator, the variable optical attenuator other end with
Polarization Controller one end connects, and the other end of Polarization Controller and centre wavelength are λ2Fiber grating one end even
Connecing, centre wavelength is λ2The fiber grating other end and centre wavelength be λ3Fiber grating one end optical fiber even
Connect；3rd port of three port circulators is connected with the input end fiber of 1*2 end bonder, and 1*2 end couples
First outfan of device is connected with the 3rd fiber port of wavelength division multiplexer, the 2nd output of 1*2 end bonder
Hold the outfan as narrow-linewidth 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, in the axial direction of adjacent two grooves
Heart septum 4.5～6m, the minimum diameter of groove is 24:25～18:25 with the external diameter numeric ratio of single-mode fiber.
This utility model is applicable to multi-wavelength narrow cable and wide optical fiber laser field, uses multiple different centre wavelength
Fiber grating select multiple different wave lengths laser, utilize micro groove optical fiber realize Rayleigh gain accumulation, enter
Row linewidth compression, it is achieved multi-wavelength narrow-linewidth laser exports.
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 multi-wavelength 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, the wavelength-division of a 980nm pump laser
In 2, one section of Er-doped fiber of multiplexer, 4, one section of micro groove optical fiber of 3, three port circulator 5, one
The fiber grating of a length of 1530.528nm of cardiac wave 7, Polarization Controller of 6, variable optical attenuator
8, centre wavelength be the fiber grating 9 of 1541.132nm, centre wavelength be the optical fiber light of 1550.527nm
10,1*2 bonder 11 of grid；
Micro groove optical fiber in the present embodiment by general single mode fiber 12 through femtosecond laser parallel micromachining make and
Become, inscribe the symmetrical micro groove 5-1 of two deep 6～7 microns with femtosecond laser on single-mode fiber surface, pass through
Repeatedly inscribe operation, general single mode fiber is formed multipair micro groove district.Described micro groove intelligent acess swashs
In light device, make the cavity length of laser instrument equal to or more than 100m, multiple micro-on general single mode fiber
Groove area can effectively suppress Brillouin scattering, meets Rayleigh scattering and accumulates in a large number, it is achieved laser linewidth compression effect
Really.
Use this micro groove optical fiber to constitute laser resonant cavity, can avoid using the laser of brillouin gain principle
The single-frequency operation instability problem that device causes because there is random Mode-hopping Phenomena, eliminates Resonant Intake System simultaneously
The restriction of degree, makes resonator cavity can reach hundred meters of magnitudes, effectively realizes Rayleigh gain accumulation, improves signal strong
Degree.
In order to make light loss in micro groove optical fiber and the inhibition of brillouin gain be obtained preferably
Balance, the parameter of micro groove optical fiber is set to: the axial length in single micro groove district is 1.8～2cm, respectively
Individual micro groove district 5-1 is spaced set, and between the axial centre in adjacent two pairs of micro groove districts, interval is (see figure
Scope shown in labelling M in 1b) 4.5～6m.Minimum diameter in micro groove district 5-1 and general single mode fiber
The ratio of external diameter between 24:25～18:25.
The port of 980nm pump laser 1 is connected with the 1st fiber port of wavelength division multiplexer 2, and wavelength-division is multiple
It is connected with one end optical fiber of Er-doped fiber 3 with the 2nd port of device 2；The other end of Er-doped fiber 3 and three ends
1st fiber port of mouth circulator 4 connects, the 2nd port of three port circulators 4 and micro groove optical fiber 5
One end optical fiber connect, the other end optical fiber of micro groove optical fiber 5 and centre wavelength are the light of 1530.528nm
One end optical fiber of fine grating 6 connects, centre wavelength be the fiber grating 6 of 1530.528nm the other end with
One end optical fiber of variable optical attenuator 7 connects, variable optical attenuator 7 other end and Polarization Controller 8 one end
Connecting, Polarization Controller 8 other end and centre wavelength are fiber grating 9 one end optical fiber of 1541.132nm
Connect, centre wavelength be fiber grating 9 other end and the centre wavelength of 1541.132nm be 1550.527nm
Fiber grating 10 one end optical fiber connect；3rd port of three port circulators 4 and 1*2 end bonder 10
Input end fiber connect, the first outfan of 1*2 end bonder 10 and the 3rd port of wavelength division multiplexer 2
Optical fiber connects, and the 2nd outfan of 1*2 end bonder 10 is as the outfan of super-narrow line width laser.
The work process of this device: opening 980nm pump laser 1, the 980nm laser of output passes through ripple
Division multiplexer 2 enters Er-doped fiber 3, and Er-doped fiber 3 absorbs 980nm laser, thus provides a broadband
Light source；Wideband light source injects micro groove optical fiber 5, centre wavelength by the 2nd port of three port circulators 4
Fiber grating 6, variable optical attenuator 7, Polarization Controller 8 and centre wavelength for 1530.528nm are
The fiber grating 9 of 1541.132nm, centre wavelength is the fiber grating 10 of 1550.527nm, three port rings
3rd port of shape device and 1*2 end bonder 11, the 3rd port of wavelength division multiplexer 2 form complete ring
Shape laser cavity.Centre wavelength be the fiber grating 6 of 1530.528nm, centre wavelength be 1541.132nm's
Fiber grating 9 and the fiber grating 10 that centre wavelength is 1550.527nm are wavelength selective elements, micro groove
Optical fiber 5 and centre wavelength be the fiber grating 6 of 1530.528nm, centre wavelength be the light of 1541.132nm
Fine grating 9 and the fiber grating 10 that centre wavelength is 1550.527nm form semi-open chamber, variable optical attenuation
Device 7 and Polarization Controller 8 provide a seed light the faintest, variable optical attenuation for micro groove optical fiber 5
The intensity of seed light is controlled by device 7, in order to avoid the backward Rayleigh signal of narrow linewidth is submerged, thus increases
Adding the probability that back scattering produces, seed light is played distributed feed-back and linewidth compression effect by micro groove optical fiber, narrow
The Rayleigh scattering light of live width circulates in annular chamber, ultimately forms laser concussion, from 1*2 end bonder 11
The 2nd outfan outwards export multi-wavelength narrow-linewidth laser signal, by after micro groove optical fiber 5 series connection or
The fiber grating removing different centre wavelength controls the number of output wavelength.Fig. 2 is this utility model embodiment
The spectrogram of middle output multi-wavelength narrow-linewidth laser, the live width of Output of laser is less than 10kHz.
This utility model is applicable to multi-wavelength narrow cable and wide optical fiber laser field, uses multiple different centre wavelength
Fiber grating as wavelength selecting device, using Er-doped fiber as gain media, utilize micro groove optical fiber real
Existing Rayleigh gain accumulation, carries out linewidth compression, it is achieved multi-wavelength narrow-linewidth laser exports.This utility model can
To be applied to the field such as optic communication, light sensing, there is Stability Analysis of Structures, 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
Er-doped fiber, three port circulators, a centre wavelength that segment length is 2 meters to 10 meters are λ1Optical fiber
Grating, variable optical attenuator, Polarization Controller, a centre wavelength are λ2Fiber grating,
One centre wavelength is λ3Fiber grating, a 1*2 bonder；
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 the 1st end of three port circulators
Mouth optical fiber connects, and the 2nd port of three port circulators is connected with one end optical fiber of micro groove optical fiber, micro groove
The other end optical fiber of optical fiber and centre wavelength are λ1One end optical fiber of fiber grating connect, centre wavelength is λ1
The other end of fiber grating be connected with one end optical fiber of variable optical attenuator, the variable optical attenuator other end with
Polarization Controller one end connects, and the other end of Polarization Controller and centre wavelength are λ2Fiber grating one end even
Connecing, centre wavelength is λ2The fiber grating other end and centre wavelength be λ3Fiber grating one end optical fiber connect；
3rd port of three port circulators is connected with the input end fiber of 1*2 end bonder, the of 1*2 end bonder
One outfan is connected with the 3rd fiber port of wavelength division multiplexer, and the 2nd outfan of 1*2 end bonder is as narrow
The outfan of live width laser；
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 |
|---|---|---|---|
| CN201620290571.8U CN205565281U (en) | 2016-04-07 | 2016-04-07 | Multi -wavelength narrow linewidth lasers output device based on micro flutes optic fibre |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620290571.8U CN205565281U (en) | 2016-04-07 | 2016-04-07 | Multi -wavelength narrow linewidth lasers output device based on micro flutes optic fibre |
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| Publication Number | Publication Date |
|---|---|
| CN205565281U true CN205565281U (en) | 2016-09-07 |
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|---|---|---|---|
| CN201620290571.8U Expired - Fee Related CN205565281U (en) | 2016-04-07 | 2016-04-07 | Multi -wavelength narrow linewidth lasers output device based on micro flutes optic fibre |
Country Status (1)
| Country | Link |
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2016
- 2016-04-07 CN CN201620290571.8U patent/CN205565281U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160907 Termination date: 20180407 |