CN202260109U - 2.0mu m waveband mode-locked fiber laser based on graphene film absorber - Google Patents
2.0mu m waveband mode-locked fiber laser based on graphene film absorber Download PDFInfo
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- CN202260109U CN202260109U CN2011203586346U CN201120358634U CN202260109U CN 202260109 U CN202260109 U CN 202260109U CN 2011203586346 U CN2011203586346 U CN 2011203586346U CN 201120358634 U CN201120358634 U CN 201120358634U CN 202260109 U CN202260109 U CN 202260109U
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Abstract
The utility model discloses a 2.0mu m waveband mode-locked fiber laser based on a graphene film absorber. Three ports of a beam combiner are respectively connected with a pumping source, a thulium-doped fiber and a 2.0mu m waveband isolator, an output terminal of the isolator is connected with a first polarization controller, the other end of the first polarization controller is connected with a port d of a coupler, two ends of a polarization-preserving fiber are respectively connected with a port e of the coupler and a second polarization controller, the other end of the second polarization controller is connected with a port f of the coupler, a port g of the coupler is connected with a graphene mode locker by a fiber, the other end of the graphene mode locker is connected with a port h of an optical splitter by another fiber, the two fibers connected with the graphene mode locker extend into a movable connector and are fixedly connected with the movable connector, ends of the two fibers are opposite to each other and a gap is reserved between the ends, a graphene film is positioned in the gap as a saturable absorber, a port i of the optical splitter is connected with the other end of the thulium-doped fiber, and a port j of the optical splitter obtains 2.0mu m waveband mode-locked laser. All the connection is realized by adopting the fibers.
Description
Technical field
The utility model belongs to fiber laser manufacturing technology field; Be specifically related to a kind of 2.0 μ m pulse optical fibers that adopt graphene film absorber locked mode; It comprises active and passive devices such as pumping source, thulium doped fiber, optical-fiber bundling device, isolator, Polarization Controller, coupler, polarization maintaining optical fibre, optical splitter, and the optical-fiber laser of its output wavelength that obtains 2.0 μ m can be applied to numerous areas such as Fibre Optical Sensor, laser medicine, radar, optical instrument, fiber laser.
Background technology
2.0 the mu m waveband fiber laser has been widely used in a plurality of fields such as laser medicine, light sensing, laser ranging, laser navigation as one of direction of forefront in the fiber laser technology research field.2.0 in the research process of mu m waveband fiber laser, the mode locking pulse fiber laser becomes the focus that the researcher pays close attention to.
The method that realizes mode locked fiber laser mainly contains active mode locking and passive mode locking, and active mode locking technique adopts and inserts the synchronous mode locking that output laser is realized in the external modulation source; The nonlinear optical effect of device realizes locked mode and ultrashort pulse output in the passive mode locking techniques make use laser resonant cavity.
Because of not needing extraneous additional modulation source; Adopt the laser of passive mode locking technology to avoid in the active mode locking laser owing to introducing the modulation bandwidth restriction that electric modulator causes; Can produce shorter light pulse; And have be easy to synchronously, characteristic such as output pulse peak power height, and simple in structure, with low cost, become the main flow of Recent study and exploitation.
Realize that the most frequently used method of passive mode locking is in resonant cavity, to add the semiconductor saturated absorbing body; Yet conventional semiconductor saturated absorbing body complex manufacturing technology, some specific optical maser wavelength inserted loss is high, spectral response range is narrow, cause that the saturable absorption effect is poor, production cost high.
Summary of the invention
The problems referred to above to the prior art existence; And based on the principle of grapheme material saturated absorption, the utility model provides a kind of 2.0 mu m waveband passive mode-locking fiber lasers that adopt the graphene film saturated absorbing body, and 2.0 mu m waveband pulse lasers of its acquisition have peak power height, narrow, the repetition rate advantages of higher of pulse duration; Its simple in structure, low cost of manufacture; And be easy to fibre system integratedly,, realize the tuning of output pulse wavelength through regulating Polarization Controller.
For realizing above-mentioned purpose; The utility model is taked following technical scheme: based on 2.0 mu m waveband passive mode-locking fiber lasers of graphene film absorber; Comprise pumping source (1), bundling device (2), thulium doped fiber (3), isolator (4), first Polarization Controller (5), coupler (6), polarization maintaining optical fibre (7), second Polarization Controller (8), optical splitter (10), Graphene mode locker (9); Graphene mode locker (9) is made up of flexible jumper (12), graphene film (13), and graphene film (13) embeds in the flexible jumper (12) as absorber; Described isolator (4) is 2.0 mu m waveband isolators (4); Pumping source (1) is through first port (a) of optical fiber connection bundling device (2), and second port (c) of bundling device (2) links to each other through optical fiber with an end of thulium doped fiber (3); The 3rd port (b) of bundling device (2) links to each other through optical fiber with the input port of 2.0 mu m waveband isolators (4); 2.0 the output port of mu m waveband isolator (4) links to each other through optical fiber with an end of first Polarization Controller (5), the other end of first Polarization Controller (5) is connected through optical fiber with first port (d) of coupler (6); Second port (e) of coupler (6) links to each other through optical fiber with an end of polarization maintaining optical fibre (7); The other end of polarization maintaining optical fibre (7) links to each other through optical fiber with an end of second Polarization Controller (8), and the other end of second Polarization Controller (8) links to each other through optical fiber with the 3rd port (f) of coupler (6); The 4th port (g) of coupler (6) links to each other through optical fiber (11) with an end of Graphene mode locker (9), and the other end of Graphene mode locker (9) links to each other through another optical fiber (11) with first port (h) of optical splitter (10); Two optical fiber (11) that link to each other with Graphene mode locker (9) all stretch in the flexible jumper (12) and respectively and are fixedly connected with flexible jumper (12) through active joint (14); Article two, the end of optical fiber (11) relatively and leave the gap, described graphene film (13) is in this gap; Second port (i) of optical splitter (10) links to each other through optical fiber with the other end of thulium doped fiber (3); The output port (j) of optical splitter (10) obtains 2.0 mu m waveband mode-locked lasers.
Preferably, the wavelength of pumping source (1) is 793nm.
Preferably, the length of thulium doped fiber (3) is 3m.
Preferably, Graphene mode locker (9) is the graphene film (13) of micron order thickness.
Preferably, optical splitter (10) adopts 80: 20 optical splitter.
Select 3 meters long thulium doped fibers, under the effect of pumping source, its length satisfies the required gain of generation 2.0 mu m waveband lasers.Between the port e of coupler and port f, insert polarization maintaining optical fibre and a Polarization Controller of one section high birefringence type; Through regulating Polarization Controller; Change the Polarization Dependent Loss of light signal in optical fiber; Thereby the interference wavelength of light signal is realized the tuning of laser oscillation wavelength between the port e of change coupler and the port f.
2.0 mu m waveband laser is because its penetrability and moisture absorption performance preferably; They be that laser technology field has one of type of application prospect most, and in the prior art, the saturated absorbing body of employing is to 2.0 mu m waveband saturated absorption poor effect; Therefore, can only be applied to non-2.0 mu m wavebands.Graphene is a kind of optical material, and its spectral response range is wide, the absorption saturation threshold is low, insert low, simple in structure, the easy and fibre system coupling of loss, is desirable saturated absorption material.The utility model adopts graphene film passive mode locking structure, utilizes Graphene as saturated absorbing body, and Graphene improves in 2.0 mu m waveband saturated absorption effects greatly, and thulium-doped fiber laser is carried out passive mode locking, obtains 2.0 mu m waveband mode locking pulse laser.
The 2.0 mu m waveband mode-locked laser good stabilities that the utility model obtains, peak power is high, pulse duration is narrow, repetition rate is high; Has high cost performance; The 2.0 mu m waveband pulse lasers that obtained are except being able to application in fields such as laser medicine, sensings; In other direction many potential application are arranged also, such as fields such as laser navigation, laser ranging, spectrum analysis, physics and safety.
The utility model can obtain peak strength greater than 10nJ, pulse duration ps magnitude, repetition rate 2.0 mu m waveband pulse lasers greater than 100MHz; Development along with various photoelectric devices; Will obtain more high strength, more short pulse, 2.0 mu m waveband pulse lasers of high repetition frequency more, and its application will be more extensive also.
Description of drawings
Fig. 1 is the structural representation based on 2.0 mu m waveband mode locked fiber lasers of graphene film absorber.
Fig. 2 is the structural representation of Graphene mode locker.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified.
Referring to Fig. 1, comprise pumping source 1, bundling device 2, thulium doped fiber 3,2.0 mu m waveband isolators 4, Polarization Controller 5, coupler 6, polarization maintaining optical fibre 7, Polarization Controller 8, Graphene mode locker 9, optical splitter 10 based on 2.0 mu m waveband mode locked fiber lasers of graphene film absorber.In the present embodiment, the wavelength of pumping source 1 is 793nm, and the length of thulium doped fiber 3 is that 3m, isolator 4 are 2.0 mu m waveband isolators.
As shown in Figure 2; Graphene mode locker 9 is made up of the graphene film 13 of flexible jumper 12, micron order thickness, embeds the graphene film 13 of micron order thickness in the middle of the flexible jumper 12, and graphene film 13 is as saturated absorbing body; Saturated absorption effect through graphene film; The oscillation light signal forms the saturated absorption effect in absorber, realize the passive mode locking to oscillator signal, obtains the output of 2.0 mu m waveband mode locking pulse laser.
The pump light that pumping source 1 produces is coupled into thulium doped fiber 3 through bundling device 2; After obtaining the 2.0 mu m waveband gains of light, regulate the polarization interference wavelength by coupler 6, polarization maintaining optical fibre 7 and Polarization Controller 8, in this process; Through regulating Polarization Controller 8; Change the Polarization Dependent Loss of light signal in optical fiber, thereby the interference wavelength of light signal between the e port of change coupler 6 and the f port is realized the tuning of laser oscillation wavelength; Pass through Graphene mode locker 9 locked modes again, by optical splitter 10 outputs 2.0 mu m waveband pulse lasers.
In order to reduce loss as much as possible, the tie point in the annular chamber between each device directly is welded together, and chooses 80: 20 optical splitter 10, makes it can make power output maximum again for laser cavity provides enough feedbacks.
The graphene film 13 of micron order thickness inserts annular chambers, through regulating Polarization Controller 8, realizes that peak strength is greater than 10nJ, pulse duration ps magnitude, repetition rate 2.0 mu m waveband pulse lasers greater than 100MHz.
For preventing 793nm pumping source 1 influence output signal, adopt the mode of pumping dorsad, the use of 2.0 mu m waveband isolators 4 guarantees the one-way transmission of light in the chamber.
More than the preferred embodiment and the principle of the utility model specified; As far as those of ordinary skill in the art; According to the thought that the utility model provides, the part that on embodiment, can change, and these change the protection range that also should be regarded as the utility model.
Claims (5)
1. based on 2.0 mu m waveband mode locked fiber lasers of graphene film absorber; Comprise pumping source (1), bundling device (2), thulium doped fiber (3), isolator (4), first Polarization Controller (5), coupler (6), polarization maintaining optical fibre (7), second Polarization Controller (8), optical splitter (10); It is characterized in that also comprising Graphene mode locker (9); Graphene mode locker (9) is made up of flexible jumper (12), graphene film (13), and graphene film (13) embeds in the flexible jumper (12) as saturated absorbing body; Described isolator (4) is 2.0 mu m waveband isolators (4);
Pumping source (1) is through first port (a) of optical fiber connection bundling device (2), and second port (c) of bundling device (2) links to each other through optical fiber with an end of thulium doped fiber (3); The 3rd port (b) of bundling device (2) links to each other through optical fiber with the input port of 2.0 mu m waveband isolators (4); 2.0 the output port of mu m waveband isolator (4) links to each other through optical fiber with an end of first Polarization Controller (5), the other end of first Polarization Controller (5) is connected through optical fiber with first port (d) of coupler (6);
Second port (e) of coupler (6) links to each other through optical fiber with an end of polarization maintaining optical fibre (7); The other end of polarization maintaining optical fibre (7) links to each other through optical fiber with an end of second Polarization Controller (8), and the other end of second Polarization Controller (8) links to each other through optical fiber with the 3rd port (f) of coupler (6);
The 4th port (g) of coupler (6) links to each other through optical fiber (11) with an end of Graphene mode locker (9), and the other end of Graphene mode locker (9) links to each other through another optical fiber (11) with first port (h) of optical splitter (10); Two optical fiber (11) that link to each other with Graphene mode locker (9) all stretch in the flexible jumper (12) and respectively and are fixedly connected with flexible jumper (12) through active joint (14); Article two, the end of optical fiber (11) relatively and leave the gap, described graphene film (13) is in this gap; Second port (i) of optical splitter (10) links to each other through optical fiber with the other end of thulium doped fiber (3); The output port (j) of optical splitter (10) obtains 2.0 mu m waveband mode-locked lasers.
2. according to the said 2.0 mu m waveband mode locked fiber lasers based on the graphene film absorber of claim 1, it is characterized in that: the wavelength of said pumping source (1) is 793nm.
3. according to the said 2.0 mu m waveband mode locked fiber lasers based on the graphene film absorber of claim 1, it is characterized in that: the length of said thulium doped fiber (3) is 3m.
4. according to the said 2.0 mu m waveband mode locked fiber lasers based on the graphene film absorber of claim 1, it is characterized in that: said Graphene mode locker (9) is the graphene film (13) of micron order thickness.
5. according to the said 2.0 mu m waveband mode locked fiber lasers based on the graphene film absorber of claim 1, it is characterized in that: described optical splitter (10) adopts 80: 20 optical splitter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011203586346U CN202260109U (en) | 2011-09-22 | 2011-09-22 | 2.0mu m waveband mode-locked fiber laser based on graphene film absorber |
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| CN2011203586346U CN202260109U (en) | 2011-09-22 | 2011-09-22 | 2.0mu m waveband mode-locked fiber laser based on graphene film absorber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI479212B (en) * | 2012-12-28 | 2015-04-01 | Metal Ind Res & Dev Ct | Fiber structure and its manufacturing method and the use of this fiber structure of the laser |
| CN108879308A (en) * | 2018-05-30 | 2018-11-23 | 重庆邮电大学 | 2 μm nanosecond noise like mode-locked laser and noise like nanosecond pulse generation method |
-
2011
- 2011-09-22 CN CN2011203586346U patent/CN202260109U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI479212B (en) * | 2012-12-28 | 2015-04-01 | Metal Ind Res & Dev Ct | Fiber structure and its manufacturing method and the use of this fiber structure of the laser |
| CN108879308A (en) * | 2018-05-30 | 2018-11-23 | 重庆邮电大学 | 2 μm nanosecond noise like mode-locked laser and noise like nanosecond pulse generation method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20140922 |
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