CN207199996U - A kind of multi-wavelength optical fiber laser based on highly doped Er-doped fiber - Google Patents
A kind of multi-wavelength optical fiber laser based on highly doped Er-doped fiber Download PDFInfo
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- CN207199996U CN207199996U CN201721090711.8U CN201721090711U CN207199996U CN 207199996 U CN207199996 U CN 207199996U CN 201721090711 U CN201721090711 U CN 201721090711U CN 207199996 U CN207199996 U CN 207199996U
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Abstract
The utility model proposes a kind of New Multi-wavelength Fiber Lasers based on highly doped Er-doped fiber.It is that the highly doped Er-doped fiber that absorption coefficient is 110 120dB/m at 46cm, 1530nm is used as gain media by the use of length.Suppress mode competition caused by homogeneously broadening effect in Er-doped fiber using caused four-wave mixing effect in 10km single-mode fibers, so that optical fiber laser produces stable multi-wavelength output at room temperature.The Lyot wave filters formed by the use of polarization-dependent isolator, polarization maintaining optical fibre, Polarization Controller are used as wavelength selecting device.Test result indicates that：By reasonable adjusting Polarization Controller and select suitable polarization maintaining optical fibre length, the changeable multiwavelength laser output in tri- kinds of Dense Wavelength intervals of 0.34nm, 0.352nm and 0.375nm is realized respectively, export laser number be respectively 16,37 and 13, realize output laser centre wavelength from 1531nm be tuned to 1559nm cover whole C-band.
Description
【Technical field】
Modern optical communication field is the utility model is related to, specifically on a kind of multi-wavelength based on highly doped Er-doped fiber
Optical fiber laser.
【Background technology】
With the high speed development of Fibre Optical Communication Technology, wavelength-division multiplex (WDM) technology is that current high-capacity optical fiber communication is universal
The technology of use, but WDM communication systems are towards channel is more and more narrow, the increasing direction of the number of channel is developed.WDM leads to
Letter system requirements multi wave length illuminating source has the characteristics that small wavelength interval, line width, power spectrum are flat, and multi-wavelength optical fiber laser can
Multiple channel sources are provided for multiple optical communication systems simultaneously, and because being very suitable for WDM communication systems the characteristics of its own.
Multi-wavelength optical fiber laser because optic communication, Fibre Optical Sensor, optical device the field such as performance test application and
Receive much concern.The technology of most critical is how effectively to suppress the uniform of doped fiber in the multi-wavelength optical fiber laser of ambient-temp-stable
Mode competition caused by broadening effect.The Er-doped fiber of early application liquid nitrogen cooling suppresses homogeneously broadening effect, so as to obtaining
Multi-wavelength oscillation, but the method is not easy to practical application.There are various technologies to solve this problem at present, be primarily introduced into
A kind of special physical mechanism, such as：Frequency shift feedback technology, nonlinear polarization rotation, nonlinear optical effect, four ripples mix
Frequency effect etc..
In many technologies, four-wave mixing (FWM) is considered as a kind of square well in design simplicity and flexibility
Method, related researcher demonstrate four based on dispersion shifted optical fiber (DSF) or photonic crystal fiber (PCF) from theoretical and experiment
Wave mixing effect can obtain stable Multiwavelength Erbium-doped Fiber Laser, however, usually requiring that using several kms even tens
The dispersion shifted optical fiber (DSF) or photonic crystal fiber (PCF) of rice improve four-wave mixing (FWM) efficiency, and this will cause into
This increase and the complexity of system.
【Utility model content】
One of the purpose of this utility model is to provide a kind of multi-wavelength optical fiber laser based on highly doped Er-doped fiber,
It can realize stable multiwavelength laser output at ambient temperature.
In order to solve the above problems, the utility model provides a kind of multi-wavelength optical fiber laser, and it includes：Pump light is provided
Pumping source, wavelength division multiplexer, highly doped Er-doped fiber, polarization-dependent isolator, polarization maintaining optical fibre, Polarization Controller, optical fiber coupling
Clutch and single-mode fiber.The output end of the pumping source is connected with the first input end of the wavelength division multiplexer, and the wavelength-division is answered
It is connected with the output end of device with one end of the highly doped Er-doped fiber, the other end of the highly doped Er-doped fiber is with polarizing phase
The input for closing isolator is connected, and the output end of polarization-dependent isolator is connected with one end of polarization maintaining optical fibre, the polarization maintaining optical fibre
The other end be connected with the input of Polarization Controller, the output end of the Polarization Controller and the input phase of fiber coupler
Even, the second output end of fiber coupler is connected with one end of single-mode fiber, the other end of single-mode fiber and the wavelength-division multiplex
Second input of device is connected, and the first output end output laser of fiber coupler, the pumping source passes through the wavelength-division multiplex
Device ensures laser unidirectional work clockwise in annular chamber to highly doped Er-doped fiber pumping pump light, the polarization-dependent isolator
Make and play a part of the polarizer, the polarization-dependent isolator, polarization maintaining optical fibre, Polarization Controller form birefringence fiber together
Wave filter, the laser polarization state of annular intracavitary is adjusted by adjusting Polarization Controller, and single-mode fiber is used for increasing the non-of intracavitary
Linear effect.
Preferably：Gain media of the highly doped Er-doped fiber as the laser, its length are 38cm-56cm, its
Absorption coefficient at 1530nm is 100~120dB/m.The wavelength of the pump light is 980nm, the maximum of the pumping source
Power output is 500mW.The length of the polarization maintaining optical fibre is 8-15m.The length of the single-mode fiber is 10km-35km.It is described
Fiber coupler is 90:10 fiber couplers, the first output end are 10% output end, and the second output end is 90% output
End.
Preferably, the ripple of output laser is changed by adjusting the polarization angle of Polarization Controller and the length of polarization maintaining optical fibre
Long interval.
Compared with prior art, the multi-wavelength optical fiber laser based on highly doped Er-doped fiber in the utility model can
Stable multiwavelength laser output is realized at ambient temperature.
【Brief description of the drawings】
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment
The accompanying drawing used is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present utility model
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.Wherein：
Fig. 1 is the New Multi-wavelength Fiber Lasers structure chart provided by the utility model based on highly doped Er-doped fiber；
Fig. 2 is the multiwavelength laser output light spectrogram that centre wavelength of the present utility model is 1531nm；
Fig. 3 is the multiwavelength laser output light spectrogram that centre wavelength of the present utility model is 1551nm；
Fig. 4 is the multiwavelength laser output light spectrogram that centre wavelength of the present utility model is 1559nm；
Fig. 5 is the multiwavelength laser output spectrum stability diagram that the centre wavelength in the utility model is 1531nm；
Fig. 6 is the multiwavelength laser output spectrum stability diagram that the centre wavelength in the utility model is 1551nm；
Fig. 7 is the multiwavelength laser output spectrum stability diagram that the centre wavelength in the utility model is 1559nm.
【Embodiment】
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings and tool
Body embodiment is described in further detail to the utility model.
" one embodiment " or " embodiment " referred to herein refers to may be included at least one realization side of the utility model
Special characteristic, structure or characteristic in formula." in one embodiment " that different places occur in this manual not refers both to
Same embodiment, nor the single or selective embodiment mutually exclusive with other embodiment.Unless stated otherwise,
The word that the expression connect, be connected, connecting herein is electrically connected with represents directly or indirectly to be electrical connected.
The utility model proposes a kind of multi-wavelength optical fiber laser 100 based on highly doped Er-doped fiber.The multi-wavelength
Optical fiber laser 100 provides pumping source (Pump), wavelength division multiplexer (WDM) 11, the highly doped Er-doped fiber (Highly of pump light
EDF) 12, polarization-dependent isolator (PD-ISO) 13, polarization maintaining optical fibre (PMF) 14, Polarization Controller 15, fiber coupler
(Coupler) 16 and single-mode fiber (SMF) 17.The output end of the pumping source Pump and the first of the wavelength division multiplexer 11
Input is connected, and the output end of the wavelength division multiplexer 11 is connected with one end of the highly doped Er-doped fiber 12, described highly doped
The other end of miscellaneous Er-doped fiber 12 is connected with the input of polarization-dependent isolator 13, the output end of polarization-dependent isolator 13 with
One end of polarization maintaining optical fibre 14 is connected, and the other end of the polarization maintaining optical fibre 14 is connected with the input of Polarization Controller 15, described inclined
The output end of controller 15 of shaking is connected with the input of fiber coupler 16, the second output end and single-mode optics of fiber coupler 16
One end of fibre 17 is connected, and the other end of single-mode fiber is connected with the second input of the wavelength division multiplexer 11, fiber coupler
16 the first output end 18 output laser.
The pumping source is by the wavelength division multiplexer 11 to the highly doped pumping pump light of Er-doped fiber 12, the polarization phase
Close isolator 13 and ensure that laser one-way only operation clockwise and plays a part of the polarizer in annular chamber, the polarization is related to isolate
Device 13, polarization maintaining optical fibre 14, Polarization Controller 15 form birefringent light fiber filter together, are adjusted by adjusting Polarization Controller 15
The laser polarization state of domain shape intracavitary, single-mode fiber 17 are used for increasing the nonlinear effect of intracavitary.
The highly doped Er-doped fiber 12 is 38cm-56cm as the gain media length of the laser, and it is in 1530nm
The absorption coefficient at place is 100~120dB/m.The wavelength of the pump light Pump is 980nm, the maximum work output of the pumping source
Rate is 500mW.The length of the polarization maintaining optical fibre PMF is 8-15m.The length of the single-mode fiber SMF is 10km-35km.It is described
Fiber coupler 16 is 90:10 fiber couplers, the first output end are 10% output end, and the second output end is 90% output
End.
In a specific embodiment, the pumping source is 980nm semiconductor laser, and length is 46cm height
Doping Er-doped fiber (LIEKKITM Er110-4/125) length is 46cm, and polarization maintaining optical fibre PMF length is 11m, quasi- single-mode optics
The length of fine (Corning SMF-28e+) is 10km, finally with one 90:10% output end of 10 fiber couplers is by laser
Coupling output, the laser of output by spectroanalysis instrument that a minimum resolution is 0.02nm (OSA, YOKOGAWATM,
AQ6370B) measure.
In order to be better understood from the filter tuning characteristic of resonator, by polarization-dependent isolator 13, polarization maintaining optical fibre 14, partially
The Lyot wave filters (birefringent light fiber filter) of the controller 15 that shakes composition, the comb filter tunable as one, humorous
Shake and change wavelength interval in chamber and peak, its transfer function are：
In formula：λ is operation wavelength；θ 1, θ 2 represent the polarizer and analyzer and the angle of polarization maintaining optical fibre fast axle respectively；
The phase delay introduced for Polarization Controller；For phase delay caused by polarization maintaining optical fibre, (Δ n is polarization-maintaining light
Double refractive inde, the λ of fibre0Centered on wavelength, L be polarization maintaining optical fibre effective length)；Between wavelength between two neighboring transmission peaks
It is divided into Δ λ=λ2/ (Δ nL), therefore can be changed by changing the effective length L of polarization maintaining optical fibre between adjacent transmissive peak
Wavelength interval and regulation Polarization Controller change the position of centre wavelength.
In experiment, the polarization maintaining optical fibre length used is 11m, and the length of single-mode fiber is 10km, fixed Polarization Controller, with
Reduce influence of the external environment to it.The threshold power of the New Multi-wavelength Fiber Lasers based on highly doped Er-doped fiber is
54mW, gradually increase the draw power of pumping source, due to huge gain competition be present in highly doped Er-doped fiber at room temperature, lead
Cause optical fiber laser can not obtain stable multi-wavelength oscillation at room temperature.When pump power increases to 180mW, laser is exported
Number of wavelengths reach maximum, but its spatial uniformity is not high, when pump power increases to 257mW, exports the spectrum of laser
Uniformity is maximum.Carefully regulation Polarization Controller, can obtain the output laser spectrum of diverse location as shown in figs. 2 to 4：
Wavelength is located at the multiwavelength laser output spectrum at 1531nm centered on Fig. 2, and 10dB spectral bandwidths cover
1528.4nm~1533.7nm wave bands, with a width of 5.3nm.There is 16 wavelength lasing simultaneously in output laser 10dB spectral bandwidths,
And the signal to noise ratio of each laser is all higher than 55dB, two neighboring wavelength interval is 0.352nm.
Wavelength is located at the multiwavelength laser output spectrum at 1551nm centered on Fig. 3, and 10dB spectral bandwidths cover
1544.4nm~1557.6nm wave bands, with a width of 13.2nm.There are 37 wavelength in output laser 10dB spectral bandwidths while swash
Penetrate, and the signal to noise ratio of each laser is all higher than 55dB, two neighboring wavelength interval is 0.34nm.
Wavelength is located at the multiwavelength laser output spectrum at 1559nm centered on Fig. 4, and 20dB spectral bandwidths cover
1556.8nm~1561.3nm wave bands, with a width of 4.5nm.There is 13 wavelength lasing simultaneously in output laser 20dB spectral bandwidths,
And the signal to noise ratio of each laser is all higher than 58dB, two neighboring wavelength interval is 0.375nm.
Position and the number of wavelengths of centre wavelength can be changed by comparing Fig. 2 to Fig. 4 and can be seen that regulation Polarization Controller
Mesh, reason are probably caused by the loss in resonator.
In order to investigate the stability of multiwavelength laser output, the laser spectrum of multi-wavelength output is carried out at ambient temperature
At intervals of 10min multiple scanning so as to observe its stability, total scanning time be 40min its scanning result as shown in figure 3,
Fig. 5 be produce 16 wavelength, centre wavelength 1531nm scanning figure, Fig. 6 for produce 37 wavelength, centre wavelengths in 1551nm
Scanning figure, Fig. 7 be produce 13 wavelength, centre wavelength 1559nm scanning figure.
As a result show：It is minimum that the maximum wavelength entirety drift value of 16 output laser of generation shown in Fig. 5 is less than spectrometer
Resolution ratio 0.02nm, peak power fluctuation are less than 0.45dB；The maximum wavelength of 37 output laser of generation shown in Fig. 6 integrally floats
Shifting amount is less than 0.065nm, and peak power fluctuation is less than 0.5dB；The maximum wavelength of 13 output laser of generation shown in Fig. 7 is overall
Drift value is less than 0.03nm, and peak power fluctuation is less than 0.7dB.This illustrates that the multi-wavelength optical fiber laser can be in room temperature bar
Stable multiwavelength laser output is realized under part.
It is pointed out that one skilled in the art specific embodiment of the present utility model is done it is any
Change the scope all without departing from claims of the present utility model.Correspondingly, the scope of claim of the present utility model
It is not limited only to previous embodiment.
Claims (7)
1. a kind of multi-wavelength optical fiber laser, it is characterised in that it includes：Pumping source, wavelength division multiplexer, the height of pump light are provided
Er-doped fiber, polarization-dependent isolator, polarization maintaining optical fibre, Polarization Controller, fiber coupler and single-mode fiber are adulterated,
The output end of the pumping source is connected with the first input end of the wavelength division multiplexer, the output end of the wavelength division multiplexer
Be connected with one end of the highly doped Er-doped fiber, the other end of the highly doped Er-doped fiber and polarization-dependent isolator it is defeated
Enter end be connected, the output end of polarization-dependent isolator is connected with one end of polarization maintaining optical fibre, the other end of the polarization maintaining optical fibre with partially
The input of controller of shaking is connected, and the output end of the Polarization Controller is connected with the input of fiber coupler, fiber coupling
Second output end of device is connected with one end of single-mode fiber, the second input of the other end of single-mode fiber and the wavelength division multiplexer
End is connected, the first output end output laser of fiber coupler,
The pumping source is by the wavelength division multiplexer to highly doped Er-doped fiber pumping pump light, the polarization-dependent isolator
Ensure that laser one-way only operation clockwise and plays a part of the polarizer in annular chamber, the polarization-dependent isolator, polarization-maintaining light
Fine, Polarization Controller forms birefringent light fiber filter together, and the laser of annular intracavitary is adjusted by adjusting Polarization Controller
Polarization state, single-mode fiber are used for increasing the nonlinear effect of intracavitary.
2. multi-wavelength optical fiber laser according to claim 1, it is characterised in that：The highly doped Er-doped fiber is used as should
The gain media of laser, its length are 38cm-56cm, and its absorption coefficient at 1530nm is 100~120dB/m.
3. multi-wavelength optical fiber laser according to claim 1, it is characterised in that：The wavelength of the pump light is 980nm,
The peak power output of the pumping source is 500mW.
4. multi-wavelength optical fiber laser according to claim 1, it is characterised in that：The length of the polarization maintaining optical fibre is 8m-
15m。
5. multi-wavelength optical fiber laser according to claim 1, it is characterised in that：The length of the single-mode fiber is
10km-35km。
6. multi-wavelength optical fiber laser according to claim 1, it is characterised in that：The fiber coupler is 90:10 light
Fine coupler, the first output end are 10% output end, and the second output end is 90% output end.
7. multi-wavelength optical fiber laser according to claim 1, it is characterised in that：By the polarization for adjusting Polarization Controller
Angle and the length of polarization maintaining optical fibre change the wavelength interval of output laser.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493749A (en) * | 2018-04-24 | 2018-09-04 | 南京邮电大学 | A kind of Tunable Multi-wavelength Fiber Laser based on high birefringence micro-nano fiber |
| CN108574195A (en) * | 2018-05-25 | 2018-09-25 | 安徽大学 | Stable tunable multi-wavelength high-doped erbium-doped fiber laser |
| CN110021871A (en) * | 2019-04-23 | 2019-07-16 | 北京航空航天大学 | A method of realizing Gao Zhongying Wavelength tunable all -fiber ultrafast pulsed laser device and system |
| CN113823989A (en) * | 2021-10-08 | 2021-12-21 | 天津理工大学 | Multi-wavelength fiber laser adopting tungsten disulfide as stable wavelength output and preparation method thereof |
| CN114039266A (en) * | 2021-11-05 | 2022-02-11 | 重庆两江卫星移动通信有限公司 | Q-switched fiber laser based on all-fiber structure filter |
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2017
- 2017-08-29 CN CN201721090711.8U patent/CN207199996U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493749A (en) * | 2018-04-24 | 2018-09-04 | 南京邮电大学 | A kind of Tunable Multi-wavelength Fiber Laser based on high birefringence micro-nano fiber |
| CN108493749B (en) * | 2018-04-24 | 2023-09-08 | 南京邮电大学 | Tunable multi-wavelength fiber laser based on high-birefringence micro-nano fiber |
| CN108574195A (en) * | 2018-05-25 | 2018-09-25 | 安徽大学 | Stable tunable multi-wavelength high-doped erbium-doped fiber laser |
| CN110021871A (en) * | 2019-04-23 | 2019-07-16 | 北京航空航天大学 | A method of realizing Gao Zhongying Wavelength tunable all -fiber ultrafast pulsed laser device and system |
| CN113823989A (en) * | 2021-10-08 | 2021-12-21 | 天津理工大学 | Multi-wavelength fiber laser adopting tungsten disulfide as stable wavelength output and preparation method thereof |
| CN114039266A (en) * | 2021-11-05 | 2022-02-11 | 重庆两江卫星移动通信有限公司 | Q-switched fiber laser based on all-fiber structure filter |
| CN114039266B (en) * | 2021-11-05 | 2024-03-22 | 重庆两江卫星移动通信有限公司 | Q-switched fiber laser based on all-fiber structure filter |
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