CN208299190U - A kind of C+L wave band superfluorescent fiber sources - Google Patents
A kind of C+L wave band superfluorescent fiber sources Download PDFInfo
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- CN208299190U CN208299190U CN201820603294.0U CN201820603294U CN208299190U CN 208299190 U CN208299190 U CN 208299190U CN 201820603294 U CN201820603294 U CN 201820603294U CN 208299190 U CN208299190 U CN 208299190U
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Abstract
本实用新型公开了一种C+L波段超荧光光纤光源，该超荧光光源包括分支隔离器、宽带耦合器、掺铒光纤组、波分复用器以及泵浦激光器；泵浦激光器发出的泵浦光入射至掺铒光纤组并激发掺铒光纤组产生前向C波段超荧光与后向C波段超荧光；前向的C波段超荧光经过波分复用器后反向，再次激发掺铒光纤组中的掺铒光纤产生L波段超荧光，宽带耦合器耦合C波段超荧光及L波段超荧光得到C+L波段超荧光并通过分支隔离器向外传输。本实用新型掺铒光纤组的并联结构更便于通过调节光纤长度使输出的C+L波段超荧光具有宽谱宽、高平坦的特点，同时，本实用新型所公开的超荧光光纤光源并不需要通过滤波器进行滤波，所以本实用新型的超荧光光纤光源还具有低成本的特点。
The utility model discloses a C+L band ultra-fluorescence optical fiber light source. The ultra-fluorescence light source comprises a branch isolator, a broadband coupler, an erbium-doped optical fiber group, a wavelength division multiplexer and a pump laser; The pump light is incident on the erbium-doped fiber group and excites the erbium-doped fiber group to produce forward C-band superfluorescence and backward C-band superfluorescence; the forward C-band superfluorescence is reversed after passing through the wavelength division multiplexer, and the erbium-doped fiber is excited again The erbium-doped fiber in the fiber group produces L-band superfluorescence, and the broadband coupler couples C-band superfluorescence and L-band superfluorescence to obtain C+L-band superfluorescence and transmits it outward through the branch isolator. The parallel structure of the erbium-doped fiber group of the utility model is more convenient to adjust the length of the fiber to make the output C+L band super-fluorescence have the characteristics of wide spectrum width and high flatness. At the same time, the super-fluorescent fiber light source disclosed by the utility model does not need Filtering is performed by a filter, so the super-fluorescent fiber light source of the utility model also has the characteristics of low cost.
Description
Technical field
The utility model relates to light sources technical fields, more specifically to a kind of C+L wave band superfluorescent fiber sources.
Background technique
By existing C+L wave band (C-band: 1525nm -1565nm, L-band: 1570nm -1620nm) superfluorescent fiber
The superfluorescence that light source directly exports does not have the wide feature of high flat degree, wide range, to realize that it is high flat that the superfluorescence of output has
It also needs to be filtered superfluorescence using filter the wide feature of degree, wide range, and uses filter to the superfluorescence of output
Cost will be increased by being filtered, therefore is provided one kind and be able to achieve that high flat degree, wide range are wide, while the superfluorescent fiber light of low cost
Source is urgently to be resolved.
Utility model content
The main purpose of the utility model is to provide a kind of C+L wave band superfluorescent fiber sources, it is intended to solve existing
Superfluorescent fiber sources in, do not make the C+L wave band superfluorescence of output have high flat degree, wide range wide, at the same have it is low at
This superfluorescent fiber sources.
To achieve the above object, the utility model provides a kind of C+L wave band superfluorescent fiber sources, the superfluorescent fiber light
Source includes: branch's isolator, wide-band coupler, Er-doped fiber group, wavelength division multiplexer and pump laser；The Er-doped fiber group
At least it is made of two Er-doped fibers in parallel；
Branch's isolator is connect with one end of the wide-band coupler, two light splitting ends of the wide-band coupler and the er-doped light
One end connection of fibre group, the other end of the Er-doped fiber group are connect with the wavelength division multiplexer；
The pump light that the pump laser issues is incident to the Er-doped fiber group, which excites the Er-doped fiber group to produce
Raw first direction C-band superfluorescence and second direction C-band superfluorescence, the first direction are the Er-doped fiber group to the broadband coupling
The direction of clutch, the second direction are the Er-doped fiber group to the direction of the wavelength division multiplexer；The second direction C-band superfluorescence
It is reversed after the wavelength division multiplexer, excite the Er-doped fiber in the Er-doped fiber group to generate first direction L-band again super glimmering
Light, which couples the first direction C-band superfluorescence and the first direction L-band superfluorescence obtains C+L wave band and surpasses
Fluorescence, the C+L wave band superfluorescence are transmitted outward by branch's isolator.
Optionally, pump laser is connect with the first end of branch's isolator；The second end of branch's isolator with should
One end of wide-band coupler connects；The C+L wave band superfluorescence is transmitted outward by the third end of branch's isolator；The pumping swashs
The pump light that light device issues is incident to the Er-doped fiber group through branch's isolator and the wide-band coupler.
Optionally, pump laser is connect with the other end of the wavelength division multiplexer, the pump light which issues
The Er-doped fiber group is incident to through the wavelength division multiplexer.
Optionally, pump laser is of coupled connections with light splitting, and the first light splitting end of the light splitting coupler is isolated with the branch
The first end of device connects, and the second light splitting end of the light splitting coupler is connect with the other end of the wavelength division multiplexer；Branch isolation
The second end of device is connect with one end of the wide-band coupler；The C+L wave band superfluorescence by the third end of branch's isolator to
Outer transmission；
The pump light that the pump laser issues is divided into the first pump light and the second pump light through the light splitting coupler, this
One pump light goes out from the first light splitting end-fire, is incident to the Er-doped fiber group through branch's isolator and wide-band coupler；This
Two pump lights go out from the second light splitting end-fire, are incident to the Er-doped fiber group through the wavelength division multiplexer.
Optionally, between branch's isolator, wide-band coupler, Er-doped fiber group, wavelength division multiplexer and pump laser
It is connected by the way of fused fiber splice coupling
Beneficial effect
The utility model provides a kind of C+L wave band superfluorescent fiber sources, which includes branch's isolator, width
Band coupler, Er-doped fiber group, wavelength division multiplexer and pump laser；One end of branch's isolator and wide-band coupler connects
It connects, the other end of wide-band coupler is connect with one end of Er-doped fiber group, and the other end and wavelength division multiplexer of Er-doped fiber group connect
It connects；The pump light that pump laser issues is incident to Er-doped fiber group, and pump light excites Er-doped fiber group to generate first direction C wave
Section superfluorescence and second direction C-band superfluorescence, first direction are Er-doped fiber group to the direction of wide-band coupler, second direction
For the direction of Er-doped fiber group to wavelength division multiplexer；Second direction C-band superfluorescence is reversed after wavelength division multiplexer, swashs again
It sends out the Er-doped fiber in Er-doped fiber group and generates first direction L-band superfluorescence, it is super that wide-band coupler couples first direction C-band
Fluorescence and first direction L-band superfluorescence obtain C+L wave band superfluorescence, and C+L wave band superfluorescence passes through branch's isolator to unofficial biography
It is defeated.In superfluorescent fiber sources provided by the utility model, Er-doped fiber group is at least by two Er-doped fiber structures in parallel
At, the parallel-connection structure of Er-doped fiber group be more convenient for making by adjusting fiber lengths output C+L wave band superfluorescence have it is high it is flat,
The wide feature of wide range, meanwhile, C+L wave band superfluorescent fiber sources provided by the utility model can be directly by adjusting optical fiber
Length inhibits emission peak of the light source 1530nm and 1560nm at and the superfluorescence spectrum issued is made to have the characteristics that height is flat,
Further due to not needing to be filtered the superfluorescence at 1530nm and 1560nm by filter, so the utility model
Superfluorescent fiber sources also have the characteristics that low cost, therefore C+L wave band superfluorescent fiber light provided by the utility model
The superfluorescence that source is issued has the characteristics that high flat degree, wide range are wide, inexpensive.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those skilled in the art, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is the structural schematic diagram of C+L wave band superfluorescent fiber sources provided by the first embodiment of the utility model,
Fig. 2 is the structural schematic diagram of C+L wave band superfluorescent fiber sources provided by second of embodiment of the utility model；
Fig. 3 is the structural schematic diagram of C+L wave band superfluorescent fiber sources provided by the third embodiment of the utility model；
Fig. 4 is the structural schematic diagram of C+L wave band superfluorescent fiber sources provided by the 4th kind of embodiment of the utility model.
Specific embodiment
It, below will knot to enable the purpose of utility model, feature, advantage of the utility model more obvious and understandable
The attached drawing in the utility model embodiment is closed, the technical scheme in the utility model embodiment is clearly and completely described,
Obviously, the described embodiments are only a part of the embodiments of the utility model, and not all embodiments.Based on the utility model
In embodiment, those skilled in the art's every other embodiment obtained without making creative work, all
Belong to the range of the utility model protection.
A kind of C+L wave band superfluorescent fiber sources provided by the utility model can be applied to fiber optic communication, optical fiber passes
The fields such as sense, optical imagery and optical device test.Referring to Fig. 1, it illustrates a kind of C provided by the embodiment of the utility model
The first embodiment of+L-band superfluorescent fiber sources, it is to be understood that the mode of " N kind embodiment " will be taken herein
Different embodiments is distinguished, above-mentioned " N " can not limit the number of the embodiments of the present invention.In the first embodiment
Details are as follows for relationship between each component and component:
C+L wave band superfluorescent fiber sources provided by the first embodiment of the utility model include: branch's isolator, width
One end of band coupler, Er-doped fiber group, wavelength division multiplexer and pump laser, branch's isolator and wide-band coupler connects
It connects, the other end of wide-band coupler is connect with one end of Er-doped fiber group, and the other end and wavelength division multiplexer of Er-doped fiber group connect
It connects.Above-mentioned Er-doped fiber group is at least made of two Er-doped fibers in parallel.
First the transmission direction of pump light is illustrated before the light source for introducing the application generates superfluorescent process: will
The direction of Er-doped fiber group to wide-band coupler is drafted as first direction, and the direction of Er-doped fiber group to wavelength division multiplexer is drafted
For second direction, C+L wave band superfluorescent fiber sources provided by the present embodiment are described below and generate superfluorescent process: pumping
The pump light that laser issues is incident to Er-doped fiber group and excites the C of the Er-doped fiber generation first direction in Er-doped fiber group
The C-band superfluorescence of the C wave band superfluorescence of wave band superfluorescence and second direction, first direction will be transmitted to wide-band coupler, the
The C wave band superfluorescence in two directions is then transmitted to wavelength division multiplexer, the reverse transfer after wavelength division multiplexer, and excites er-doped again
Er-doped fiber in optical fiber group generates the L-band superfluorescence transmitted to first direction and the L-band transmitted to second direction is super glimmering
Light, it is to be understood that the L-band superfluorescence transmitted to second direction will after wavelength division multiplexer reverse transfer, become to the
The L-band superfluorescence of one direction transmission.Finally, the C-band superfluorescence and L-band that wide-band coupler carrys out coupled transfer are super glimmering
Light obtains C+L wave band superfluorescence, and the C+L wave band superfluorescence which obtains will be transmitted outward by branch's isolator, formed by
The C+L wave band superfluorescence of the high flat degree of the light source output, wide bandwidth.It is to be appreciated that the broadband couple device in the present embodiment
The pump light light splitting that device can arrive transmission is two beam pump lights, meanwhile, which can also couple C-band and L wave
The wave-length coverage of the superfluorescence of section, i.e. its light splitting coupling includes pumping wavelength and C+L band wavelength.
In second of embodiment, pump laser is connect with the first end 1 of branch's isolator, referring to fig. 2.It needs to understand that
, branch's isolator is to allow light to a direction by preventing the passive device passed through round about, and effect is pair
The direction of light is limited, make light can only one direction transmission, can be good by optoisolator by the light of optical fiber echo reflection
Isolation improves light wave transmissions efficiency.In the present invention, branch's isolator is to have three ends, the first end 1 of branch's isolator with
Pump laser connection, pump laser can will pass through branch's isolator, broadband by the port incident pump light, the pump light
It is incident to Er-doped fiber group after coupler, excites the Er-doped fiber in Er-doped fiber group；The second end 2 of branch's isolator and broadband
The incident pump light of coupler connection can be transmitted to wide-band coupler by the second end 2, meanwhile, by first direction transmission
The C+L wave band superfluorescence come can also be transmitted to branch's isolator by the second end 2；The third end 3 of branch's isolator is light
The output end in source.Light-path in the provided C+L wave band superfluorescent fiber sources of the present embodiment: pump laser hair is provided herein
Pump light out is incident to Er-doped fiber group through branch's isolator and wide-band coupler, excites the er-doped light in Er-doped fiber group
Fibre generates the C wave band superfluorescence of first direction and the C-band superfluorescence of second direction, and the C-band superfluorescence of first direction will
It is transmitted to wide-band coupler, the C-band superfluorescence of second direction is then transmitted to wavelength division multiplexer, is reversely passed after wavelength division multiplexer
It is defeated, and excite again the Er-doped fiber in Er-doped fiber group generate the L wave band superfluorescence that is transmitted to first direction with to second party
To the L-band superfluorescence of transmission, finally, wide-band coupler obtains the C-band superfluorescence that coupled transfer is come and L-band superfluorescence
To C+L wave band superfluorescence, the C+L wave band superfluorescence which obtains will be transmitted outward by the third end 3 of branch's isolator,
Formation is by the high flat degree of the light source output, the C+L wave band superfluorescence of wide bandwidth.
In the third embodiment, the other end of pump laser and wavelength division multiplexer is connected, referring to Fig. 3, pumping laser
The pump light that device issues will be incident to Er-doped fiber group through wavelength division multiplexer, excite the Er-doped fiber in Er-doped fiber group, generate
The C-band superfluorescence of the C-band superfluorescence of first direction and the C-band superfluorescence of second direction, first direction will be to broadband coupling
Clutch transmission, the C-band superfluorescence of second direction are then transmitted to wavelength division multiplexer, the reverse transfer after wavelength division multiplexer, and again
It is secondary excitation Er-doped fiber group in Er-doped fiber generate to first direction transmit L-band superfluorescence with to second direction transmit
L-band superfluorescence, finally, the C-band superfluorescence that coupled transfer is come and L-band superfluorescence are obtained C+L wave by wide-band coupler
Section superfluorescence, the C+L wave band superfluorescence which obtains will be transmitted outward by the third end 3 of branch's isolator, formed by this
The C+L wave band superfluorescence of the high flat degree of light source output, wide bandwidth.
In the 4th kind of embodiment, pump laser is of coupled connections with light splitting, and the first of light splitting coupler is divided end 1 and divides
The first end 1 of branch isolator connects, and the second light splitting end 2 of light splitting coupler is connect with the other end of wavelength division multiplexer, referring to figure
4.It is to be appreciated that the light splitting coupler is different from above-mentioned wide-band coupler, it is divided just for pumping wavelength
Coupler.As the connection relationship of branch's isolator port in first embodiment, second end 2 and wide-band coupler
One end connection, finally obtained superfluorescence are transmitted outward by its third end 3.In the third embodiment, pump laser hair
Pump light out is divided into the first pump light and the second pump light through light splitting coupler, and the first pump light is projected from the first light splitting end 1,
Er-doped fiber group is incident to through branch's isolator and wide-band coupler；Second pump light is projected from the second light splitting end 2, through wavelength-division
Multiplexer is incident to Er-doped fiber group.It is to be appreciated that the first pump light, the second pump light function that light splitting coupler is separated
Rate can be adjusted.Introduce the light-path in the provided C+L wave band superfluorescent fiber sources of the present embodiment herein: pumping swashs
The pump light that light device issues is divided to form the first pump light and the second pump light through light splitting coupler, and the first pump light passes through branch
Isolator and wide-band coupler are incident to Er-doped fiber group, excite the Er-doped fiber in Er-doped fiber group, generate the C of first direction
The C-band superfluorescence of the C-band superfluorescence of wave band superfluorescence and second direction, first direction will be transmitted to wide-band coupler, the
The C-band superfluorescence in two directions is then transmitted to wavelength division multiplexer, the reverse transfer after wavelength division multiplexer, and excites er-doped light again
Er-doped fiber in fine group generates the L-band superfluorescence transmitted to first direction and the L-band superfluorescence to second direction transmission；
Second pump light is incident to Er-doped fiber group through wavelength division multiplexer, excites the Er-doped fiber in Er-doped fiber group, generates first party
To C-band superfluorescence and second direction C-band superfluorescence, the C-band superfluorescence of first direction will pass to wide-band coupler
Defeated, the C-band superfluorescence of second direction is then transmitted to wavelength division multiplexer, the reverse transfer after wavelength division multiplexer, and is excited again
Er-doped fiber in Er-doped fiber group generates the L-band superfluorescence transmitted to first direction and the L-band to second direction transmission
Superfluorescence.Finally, to obtain C+L wave band super glimmering for C-band superfluorescence and L-band superfluorescence that wide-band coupler carrys out coupled transfer
Light, the C+L wave band superfluorescence which obtains will be transmitted outward by the third end 3 of branch's isolator, formed defeated by the light source
The C+L wave band superfluorescence of high flat degree, wide bandwidth out.
In the other example of above-described embodiment, branch's isolator, wide-band coupler, Er-doped fiber group, wavelength-division are multiple
With between device and pump laser using fused fiber splice coupling by the way of connect.
It is to be understood that passing through the pumping for optimizing pump laser in superfluorescent fiber sources provided by the utility model
The length of power and two Er-doped fibers of parallel connection can make superfluorescent fiber sources output high flat degree, wide bandwidth
Superfluorescence, while directly adjusting to can inhibit by internal gain and mix there is no any filter is used in the present invention
The 1530nm of erbium optical fiber and the emission peak at 1560nm and keep spectrum height flat, meanwhile, the utility model simultaneously eliminates conventional junction
The reflecting mirror that must be used in structure keeps its structure simpler, is conducive to reduce dimension of light source, reduces cost.
It should be noted that for the various method embodiments described above, describing for simplicity, therefore, it is stated as a series of
Combination of actions, but those skilled in the art should understand that, the utility model is not limited by the described action sequence,
Because certain steps can use other sequences or carry out simultaneously according to the utility model.Secondly, those skilled in the art
It should be aware of, the embodiments described in the specification are all preferred embodiments, and related actions and modules might not be all
It is necessary to the utility model.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, it may refer to the associated description of other embodiments, meanwhile, above-mentioned the utility model embodiment serial number is for illustration only, no
The superiority and inferiority of embodiment is represented, those skilled in the art are not departing from the utility model under the enlightenment of the utility model
In the case of objective and scope of the claimed protection, many forms can be also made, these belong to the protection of the utility model
Within.
Claims (5)
1. a kind of C+L wave band superfluorescent fiber sources, which is characterized in that the superfluorescent fiber sources include: branch's isolator,
Wide-band coupler, Er-doped fiber group, wavelength division multiplexer and pump laser；The Er-doped fiber group is at least in parallel by two
Er-doped fiber is constituted；
Branch's isolator is connect with one end of the wide-band coupler, the other end of the wide-band coupler and the er-doped
One end of optical fiber group connects, and the other end of the Er-doped fiber group is connect with the wavelength division multiplexer；
The pump light that the pump laser issues is incident to the Er-doped fiber group, and the pump light excites the Er-doped fiber
Group generates first direction C-band superfluorescence and second direction C-band superfluorescence, the first direction be the Er-doped fiber group extremely
The direction of the wide-band coupler, the second direction are the Er-doped fiber group to the direction of the wavelength division multiplexer；It is described
Second direction C-band superfluorescence is reversed after the wavelength division multiplexer, excites the er-doped light in the Er-doped fiber group again
Fibre generates first direction L-band superfluorescence, and the wide-band coupler couples the first direction C-band superfluorescence and described first
Direction L-band superfluorescence obtains C+L wave band superfluorescence, and the C+L wave band superfluorescence is transmitted outward by branch's isolator.
2. C+L wave band superfluorescent fiber sources as described in claim 1, the pump laser and branch's isolator
First end connection；The second end of branch's isolator is connect with one end of the wide-band coupler；The C+L wave band superfluorescence
It is transmitted outward by the third end of branch's isolator；The pump light that the pump laser issues is through branch's isolator
The Er-doped fiber group is incident to the wide-band coupler.
3. C+L wave band superfluorescent fiber sources as described in claim 1, the pump laser and the wavelength division multiplexer
Other end connection, the pump light that the pump laser issues are incident to the Er-doped fiber group through the wavelength division multiplexer.
4. C+L wave band superfluorescent fiber sources as described in claim 1, the pump laser are connect with light splitting coupler,
First light splitting end of the light splitting coupler is connect with the first end of branch's isolator, and second point of the light splitting coupler
Light end is connect with the other end of the wavelength division multiplexer；The second end of branch's isolator and one end of the wide-band coupler
Connection；The C+L wave band superfluorescence is transmitted outward by the third end of branch's isolator；
The pump light that the pump laser issues is divided into the first pump light and the second pump light through the light splitting coupler, described
First pump light goes out from the first light splitting end-fire, is incident to the er-doped through branch's isolator and the wide-band coupler
Optical fiber group；Second pump light goes out from the second light splitting end-fire, is incident to the Er-doped fiber through the wavelength division multiplexer
Group.
5. C+L wave band superfluorescent fiber sources according to any one of claims 1-4, which is characterized in that branch's isolation
Between device, wide-band coupler, Er-doped fiber group, wavelength division multiplexer and pump laser by the way of fused fiber splice coupling
Connection.
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| CN201820603294.0U CN208299190U (en) | 2018-04-25 | 2018-04-25 | A kind of C+L wave band superfluorescent fiber sources |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418087A (en) * | 2018-04-25 | 2018-08-17 | 深圳技术大学（筹） | A C+L band superfluorescent fiber optic light source |
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2018
- 2018-04-25 CN CN201820603294.0U patent/CN208299190U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418087A (en) * | 2018-04-25 | 2018-08-17 | 深圳技术大学（筹） | A C+L band superfluorescent fiber optic light source |
| CN108418087B (en) * | 2018-04-25 | 2024-10-11 | 深圳技术大学 | C+L wave band super-fluorescent optical fiber light source |
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