CN209516303U - A kind of changeable multiple-wavelength laser that all -fiber wavelength interval is variable - Google Patents
A kind of changeable multiple-wavelength laser that all -fiber wavelength interval is variable Download PDFInfo
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- CN209516303U CN209516303U CN201920100477.5U CN201920100477U CN209516303U CN 209516303 U CN209516303 U CN 209516303U CN 201920100477 U CN201920100477 U CN 201920100477U CN 209516303 U CN209516303 U CN 209516303U
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Abstract
A kind of changeable multiple-wavelength laser that all -fiber wavelength interval is variable, belongs to fiber optic communication, instrument field.While the variation of output wavelength number, the interval of wavelength can also change.This laser is to be sequentially ingressed into Polarization Controller two (07), polarization maintaining optical fibre one (08) between the port 7 113 on the right side of the interface 061 and fiber coupler two (11) of fiber coupler one (06)；It is sequentially ingressed into Polarization Controller three (09), polarization maintaining optical fibre two (10) two Lyot filters of composition between the port 9 114 on the right side of the left side interface 062 and fiber coupler two (11) of fiber coupler one (06), interferes its output spectrum；Polarization Controller one (04), polarization-dependent isolator (05) and Polarization Controller two (07), Polarization Controller three (09) constitute nonlinear polarization rotation, suppression mode competition, the variation at number of wavelengths and interval can be realized by adjusting three Polarization Controllers.The laser has many advantages, such as that structure is simple, wavelength interval and variable amounts, is suitable for wavelength-division multiplex system.
Description
Technical field
The utility model relates to the changeable multiple-wavelength lasers that a kind of all -fiber wavelength interval can be changed, and it is logical to belong to optical fiber
Letter, instrument field.
Background technique
With the development of modern society, IT industry emerges rapidly, on Global Internet number of users is exponential
It rises, message capacity is being constantly increasing, and wavelength-division multiplex technique becomes the technology generally used in optical communication network.The original of the technology
Reason is to transmit multiple wavelength multiplexings into an optical fiber.However the multiplexing of multiple wavelength means that and needs multiple laser
Light source, if using semiconductor laser array as laser light source, it will greatly improve the cost and complexity of communication system.
The advantages that multi-wavelength optical fiber laser has structure simple, low in cost, steadily can export multiple wavelength simultaneously.
In addition in fiber optic communication field, multi-wavelength optical fiber laser also has widely in optical signal prosessing, the fields such as microwave photon technology
Using.1987, start the relevant report for research multi-wavelength optical fiber laser occur in the world.With the continuous deepening of research,
People have devised a plurality of types of lasers, such as narrow linewidth multiple-wavelength laser, wave-length coverage adjustable multi-wavelength laser, wave
Long interval adjustable multi-wavelength laser, multi-wavelength mode locked fiber laser etc..The it is proposed of these lasers, is greatly promoted light
The development of communication system.
Wherein, the output for arriving multiple wavelength may be implemented in the changeable multi-wavelength optical fiber laser of wavelength, for difference
Channel provide light source.In addition, the proposition for the multiple-wavelength laser that wavelength interval can be changed can satisfy different channel spacings
The needs of communication network.If the laser of both types can be combined, while realizing the wave of multiple-wavelength laser
The switching of long number and the variation of wavelength interval, are beneficial to the promotion of the flexibility of communication network, and reduce cost and answer
Miscellaneous degree has critically important meaning for the development of future communications network.
In research many at present, the variation of wavelength interval is 2 to 3 fixed values.There is scheme by two tunable filters
Wave device links together, and increases the variation of wavelength interval, but can only realize 1 to 2 wavelength outputs, and increase structure
Cost.The utility model uses all optical fibre structure, by adjusting Polarization Controller, realizes the output of 1~3 wavelength, while can
Neatly to change the wavelength interval of multi-wavelength.
Utility model content
The utility model is mainly solving the technical problems that realizing that output wavelength can for current numerous optical fiber lasers
While switching, the problem of can not being changed to the interval of wavelength, propose that a kind of all -fiber wavelength interval is variable to cut
Change multiple-wavelength laser.
Used technical solution is as follows:
Including pump light source, wavelength division multiplexer, doped fiber, polarization-dependent isolator, fiber coupler one, fiber coupling
The identical polarization maintaining optical fibre one of device two, length and polarization maintaining optical fibre two, Polarization Controller one, Polarization Controller two, Polarization Controller three.
Pump light source is connected with the input terminal on the right side of wavelength division multiplexer, the port one in the left side of wavelength division multiplexer and doping light
Fine one end is connected, and the port two on the right side of wavelength division multiplexer is connected with the port three of fiber coupler two.The port of doped fiber
Four are connected with Polarization Controller one, and the output port of Polarization Controller one is connected with polarization-dependent isolator.The related isolation of polarization
Port five on the left of device is connected with the right side a port of fiber coupler one.It is pressed at the first port in one left side of fiber coupler
Sequence access Polarization Controller two and polarization maintaining optical fibre one, two right side of port six and fiber coupler on the right side of polarization maintaining optical fibre one
Port seven is connected.The second port in one left side of fiber coupler accesses Polarization Controller three and polarization maintaining optical fibre two, polarization-maintaining in order
The right side port eight of optical fiber two is connected with the port nine on two right side of fiber coupler.The left side second port of fiber coupler two is made
For the output port of laser.
The doped fiber is Er-doped fiber, Yb dosed optical fiber and thulium doped fiber.
Effect possessed by the utility model is as follows:
Propose a kind of changeable multiple-wavelength laser that all -fiber wavelength interval is variable.The laser is related using polarization
Isolator, Polarization Controller and polarization maintaining optical fibre are combined into two Lyot filters, are filtered the two using two fiber couplers
Wave device is connected, and interferes their output spectrum.Polarization-dependent isolator and Polarization Controller one respectively with Polarization Control
Device two and Polarization Controller three form nonlinear polarization effect, inhibit the wavelength competition in laser.Three polarizations are adjusted simultaneously
The output of 1~3 wavelength may be implemented in controller.
When output is Single wavelength, keep Polarization Controller two and three motionless, wavelength model can be realized by adjusting Polarization Controller 1
The tuning enclosed.It is 17.6nm that theoretic wave-length coverage, which can be obtained, according to the length of polarization maintaining optical fibre and double refractive inde.
It when output is dual wavelength, keeps Polarization Controller one motionless, adjusts two He of Polarization Controller in a certain range
Three, it can be achieved that wavelength interval variation.Theoretic wavelength interval can be obtained according to the length of polarization maintaining optical fibre and double refractive inde
It is up to 17.6nm.
It when output is three wavelength, keeps Polarization Controller one motionless, adjusts two He of Polarization Controller in a certain range
Three, wavelength interval changes.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for the changeable multiple-wavelength laser that all -fiber wavelength interval can be changed.
Specific embodiment
Utility model is further illustrated with reference to the accompanying drawing.
Embodiment one
A kind of changeable multiple-wavelength laser that all -fiber wavelength interval is variable, as shown in Figure 1, it includes pump light source
(01), wavelength division multiplexer (02), Er-doped fiber (03), Polarization Controller one (04), polarization-dependent isolator (05), fiber coupling
Device one (06), Polarization Controller two (07), the polarization maintaining optical fibre one (08) that length is 75 centimetres, Polarization Controller three (09), length
Polarization maintaining optical fibre two (10), fiber coupler two (11) for 75 centimetres.
Pump light source 01 is connected with the input terminal 021 of wavelength division multiplexer 02, the port 1 of wavelength division multiplexer 02 with mix
One end of erbium optical fiber 03 is connected.3 111 phase of left side port of the port 2 022 of wavelength division multiplexer 02 and fiber coupler 2 11
Even.The port 4 031 of Er-doped fiber 03 is connected with Polarization Controller 1, the output port 041 of Polarization Controller 1 and partially
The dependent isolator 05 that shakes is connected.The port 5 051 in the left side of polarization-dependent isolator 05 and the right-hand end of fiber coupler 1
Mouth is connected.Polarization Controller 2 07 is sequentially ingressed at the interface 061 of fiber coupler 1 in order and length is 75 centimetres
The port 6 081 of polarization maintaining optical fibre 1, polarization maintaining optical fibre 1 is connected with the port 7 113 on 2 11 right side of fiber coupler.Optical fiber
The polarization maintaining optical fibre 2 10 that the left side interface 062 of coupler 1 accesses Polarization Controller 3 09 in order and length is 75 centimetres,
The port 8 101 on the right side of polarization maintaining optical fibre 2 10 is connected with the port 9 114 on 2 11 right side of fiber coupler.Fiber coupler
Output port of the 2 11 left side second port 112 as laser.
Embodiment two and embodiment one the difference is that
Doped fiber 03 is Yb dosed optical fiber, and the length of polarization maintaining optical fibre one and polarization maintaining optical fibre two is 35 centimetres.
Embodiment three and embodiment one and embodiment two the difference is that
Doped fiber 03 is thulium doped fiber, and the length of polarization maintaining optical fibre one and polarization maintaining optical fibre two is 1.2 meters.
Claims (6)
1. a kind of variable changeable multiple-wavelength laser in all -fiber wavelength interval, it is characterised in that:
Including pump light source (01), wavelength division multiplexer (02), doped fiber (03), Polarization Controller one (04), polarization it is related every
From device (05), fiber coupler one (06), Polarization Controller two (07), polarization maintaining optical fibre one (08), Polarization Controller three (09), protect
Polarisation fibre two (10), fiber coupler two (11), pump light source (01) are connected with the input terminal (021) of wavelength division multiplexer (02),
The port one (023) of wavelength division multiplexer (02) is connected with one end of doped fiber (03), the port two of wavelength division multiplexer (02)
(022) it is connected with the port three (111) on the left of fiber coupler two (11), the port four (031) of doped fiber (03) and polarization
Controller one (04) is connected, and Polarization Controller one (04) output port (041) is connected with polarization-dependent isolator (05), polarizes phase
It closes the port five (051) on the left of isolator (05) to be connected with the right output port of fiber coupler one (06), fiber coupler one (06)
Interface (061) at be sequentially ingressed into Polarization Controller two (07) and polarization maintaining optical fibre one (08) in order, polarization maintaining optical fibre one (08) is right
The port six (081) at end is connected with the port seven (113) of fiber coupler two (11), the left side interface of fiber coupler one (06)
(062) Polarization Controller three (09) and polarization maintaining optical fibre two (10), the port eight on the right side of polarization maintaining optical fibre two (10) are accessed in order
(101) it is connected with the port nine (114) of fiber coupler two (11), the left side output end (112) of fiber coupler two (11) is made
For the output port of laser.
2. a kind of variable changeable multiple-wavelength laser in all -fiber wavelength interval according to claim 1, feature exist
In:
The doped fiber (03) includes Er-doped fiber, Yb dosed optical fiber or thulium doped fiber.
3. a kind of variable changeable multiple-wavelength laser in all -fiber wavelength interval according to claim 1, feature exist
In, using Er-doped fiber be gain fibre when, the length of polarization maintaining optical fibre one (08) and polarization maintaining optical fibre two (10) is 75cm.
4. a kind of variable changeable multiple-wavelength laser in all -fiber wavelength interval according to claim 1, feature exist
In, using Yb dosed optical fiber be gain fibre when, the length of polarization maintaining optical fibre one (08) and polarization maintaining optical fibre two (10) is 35cm.
5. a kind of variable changeable multiple-wavelength laser in all -fiber wavelength interval according to claim 1, feature exist
In, using thulium doped fiber be gain fibre when, the length of polarization maintaining optical fibre one (08) and polarization maintaining optical fibre two (10) is 1.2m.
6. a kind of variable changeable multiple-wavelength laser in all -fiber wavelength interval according to claim 1, feature exist
In the splitting ratio of fiber coupler one (06) and fiber coupler two (11) is 50:50.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920100477.5U CN209516303U (en) | 2019-01-22 | 2019-01-22 | A kind of changeable multiple-wavelength laser that all -fiber wavelength interval is variable |
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| CN201920100477.5U CN209516303U (en) | 2019-01-22 | 2019-01-22 | A kind of changeable multiple-wavelength laser that all -fiber wavelength interval is variable |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112838466A (en) * | 2019-11-25 | 2021-05-25 | 北京交通大学 | Switchable and tunable multi-wavelength fiber laser |
| CN113687471A (en) * | 2021-08-10 | 2021-11-23 | 杭州电子科技大学 | Optical fiber comb filter with switchable wavelength intervals |
| CN114498261A (en) * | 2021-12-31 | 2022-05-13 | 北京交通大学 | Multi-wavelength fiber laser with adjustable stable optical signal-to-noise ratio |
-
2019
- 2019-01-22 CN CN201920100477.5U patent/CN209516303U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112838466A (en) * | 2019-11-25 | 2021-05-25 | 北京交通大学 | Switchable and tunable multi-wavelength fiber laser |
| CN112838466B (en) * | 2019-11-25 | 2022-04-15 | 北京交通大学 | Switchable and tunable multi-wavelength fiber laser |
| CN113687471A (en) * | 2021-08-10 | 2021-11-23 | 杭州电子科技大学 | Optical fiber comb filter with switchable wavelength intervals |
| CN113687471B (en) * | 2021-08-10 | 2023-09-22 | 杭州电子科技大学 | Optical fiber comb filter with switchable wavelength interval |
| CN114498261A (en) * | 2021-12-31 | 2022-05-13 | 北京交通大学 | Multi-wavelength fiber laser with adjustable stable optical signal-to-noise ratio |
| CN114498261B (en) * | 2021-12-31 | 2023-11-10 | 北京交通大学 | Multi-wavelength fiber laser with adjustable stable optical signal-to-noise ratio |
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