CN207719582U - Narrow linewidth MOPA fiber amplifiers - Google Patents
Narrow linewidth MOPA fiber amplifiers Download PDFInfo
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- CN207719582U CN207719582U CN201820060343.0U CN201820060343U CN207719582U CN 207719582 U CN207719582 U CN 207719582U CN 201820060343 U CN201820060343 U CN 201820060343U CN 207719582 U CN207719582 U CN 207719582U
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Abstract
The utility model discloses a kind of narrow linewidth MOPA fiber amplifiers, narrow linewidth MOPA fiber amplifiers between prime amplifying stage light channel structure and rear class amplifying stage light channel structure by adding three port circulator A, and the filtering structure for filtering out SBS light is set at the port 3 of three port circulator A, using the one-way conduction and filtering structure of circulator, the stimulated Brillouin scattering light of main amplifier stage generation can be effectively filtered out.
Description
Technical field
The utility model is related to fiber amplifier fields, more particularly to a kind of narrow linewidth MOPA fiber amplifiers.
Background technology
Single mode narrow linewidth fiber amplifier based on master oscillation power amplification (MOPA) structure and solid single-frequency laser and
Frequency stabilization CO2 lasers are compared, and are had the characteristics that small modular, reliability height, long lifespan, are included using spirit and easy to maintain,
Its volume, weight, compactedness and reliability etc. all tools have great advantage during machine system is integrated, and also have in price
There is greater advantage, therefore, single mode narrow linewidth fiber amplifier is in laser radar, laser ranging, frequency conversion, optics coherence tomography and light
The fields such as fax sense are widely used.
With the raising of the mean power especially peak power of single mode narrow linewidth fiber amplifier, the power of light in optical fiber
Density is very high, and the interaction with optical fiber becomes apparent with the increase of fiber lengths, when peak power is more than SBS in optical fiber
Or the threshold value of SRS, the stokes light that frequency moves down is will produce, the decline of output laser power is resulted in.Especially SBS is imitated
It answers, because SBS optical wavelength is in signal light gain amplifier bandwidth and gain coefficient is larger, the reverse transfers pulse generated can quilt
Amplification system (especially main amplifier stage) is amplified, and backward SBS luminous powers can exponentially increase with the increase of forward signal luminous power
It is long, it is excessively high to peak power after causing and destroy prime device such as fibre optic isolater.The method of SBS effects is inhibited to have very much, packet
It includes and increases the spectrum width of signal light, reduces optical fiber effective length, increases fibre core effective core area and change fibre core Doped ions
Distribution etc., but in practical applications, it is desirable that single mode narrow linewidth fiber amplifier has higher output power, better light beam matter
Amount and simpler operation, this can limit the scope of application of above method and inhibition and the appearance SBS that is avoided without hair
Effect, in addition the different gain fibre type of identical amplifying stage, different gain fibre length and different pump modes be all
It can lead to the variation of amplifying stage SBS effect threshold powers, so how accurately simply and effectively to detect and filter out MOPA master
SBS light in amplifying stage directly affects the commercial applications of single mode narrow linewidth fiber amplifier.
Invention content
To solve the above-mentioned problems, the utility model proposes a kind of narrow linewidth MOPA fiber amplifiers, narrow linewidth MOPA
The stimulated Brillouin scattering light (SBS light) that main amplifier stage generates in fiber amplifier can be effectively filtered out.
What the technical solution of the utility model was realized in：
A kind of narrow linewidth MOPA fiber amplifiers, including at least two-stage amplifying stage light channel structure and be set to two-stage amplifying stage light
Three port circulator A between line structure；The signal light of prime amplifying stage light channel structure output is through the three ports circulator A's
Port 1 and port 2 enter in rear class amplifying stage light channel structure, described in the reversed SBS light warp that rear class amplifying stage light channel structure generates
The port 2 of three port circulator A is transmitted to port 3, and is located at the filtering structure at the port 3 of the three ports circulator A
It filters out.
Further, the filtering structure is：High refractive index glue is coated at the port 3 of the three ports circulator A, or
Person connects the cavity for being coated with absorbing material at the port 3 of the three ports circulator A.
Further, at least two-stage amplifying stage light channel structure is by pre-amplification stage light channel structure and main amplifier stage light channel structure
The two-stage of composition amplifies light channel structure.
Further, the pre-amplification stage light channel structure includes seed source, pumping source A, bundling device A and gain fibre A；Institute
It includes pumping source B, bundling device B, gain fibre B and output end to state main amplifier stage light channel structure；The seed source and the pumping
Source A is connected with the input terminal of the bundling device A, and the output end of the bundling device A is connected with one end of the gain fibre A
It connects, the other end of the gain fibre A is connected with the port 1 of the three ports circulator A；The pumping source B and the conjunction
The input terminal of beam device B is connected, and the output end of the bundling device B is connected with one end of the gain fibre B, the gain light
The other end of fine B is connected with the port 2 of the three ports circulator A, and the pre-amplification stage light channel structure is put with the master
It is connected with narrow band filter between big grade light channel structure.
Further, the pre-amplification stage light channel structure includes seed source, three port circulator B, the first gain fibre, wave
Division multiplexer, broadband optical fiber speculum and the first pumping source；The main amplifier stage light channel structure includes the second gain fibre, closes beam
Device, the second pumping source and output end；The output end of the seed source is connected with the port 1 of the three ports circulator B, described
The port 2 of three port circulator B is connected with one end of first gain fibre, the other end of first gain fibre according to
The secondary connection wavelength division multiplexer and the broadband optical fiber speculum, first pumping source in a manner of backward pump with it is described
Wavelength division multiplexer is connected, and the port 3 of the three ports circulator B is connected with the port 1 of the three ports circulator A；Institute
The one end for stating the second gain fibre is connected with the port 2 of the three ports circulator A, the other end of second gain fibre
It is sequentially connected the bundling device and the output end, second pumping source is connected with backward pump mode with the bundling device
It connects.
Further, the pre-amplification stage light channel structure further includes tunable optic filter, the tunable optic filter connection
Between the wavelength division multiplexer and the broadband optical fiber speculum.
Further, first gain fibre is single mode Er-doped fiber, and the seed source is direct electrical modulation
1550nm semiconductor lasers, first pumping source are 980nm single mode semiconductor lasers, and the wavelength division multiplexer is
980nm/1550nm wavelength division multiplexers, second pumping source are 975nm multimode semiconductor lasers, second gain fibre
For double clad erbium-ytterbium co-doped fiber.
Further, further include pumping source for driving each amplifying stage light channel structure amplification stage drive circuit,
Seed source driving circuit for driving the seed source and the control circuit that aforementioned each driving circuit is controlled.
Compared with prior art, the utility model proposes one kind to have the function of to filter out stimulated Brillouin scattering light (SBS light)
Narrow linewidth MOPA fiber amplifiers, by adding three between prime amplifying stage light channel structure and rear class amplifying stage light channel structure
Port circulator A, and filtering structure of the setting for filtering out SBS light at the port 3 of three port circulator A, utilize circulator
One-way conduction and filtering structure, can effectively filter out main amplifier stage generation stimulated Brillouin scattering light (SBS light).
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model narrow linewidth MOPA fiber amplifiers；
Fig. 2 is the narrow linewidth MOPA fiber amplifier structures that 1 two-stage of the preferred embodiment in the utility model amplifies light channel structure
Schematic diagram；
Fig. 3 is the narrow linewidth MOPA fiber amplifier structures that 2 two-stage of the preferred embodiment in the utility model amplifies light channel structure
Schematic diagram.
Specific implementation mode
Referring to Fig. 1, the utility model proposes a kind of narrow linewidth MOPA fiber amplifiers, including at least two-stage amplifying stage light path
Structure and the three port circulator A100 between two-stage amplifying stage light channel structure；Prime amplifying stage light channel structure 200 exports
Port 1 of the signal light through the three ports circulator A and port 2 enter in rear class amplifying stage light channel structure 300, rear class amplification
Port 2 of the reversed SBS light through the three ports circulator A that grade light channel structure generates is transmitted to port 3, and is located at described three
Filtering structure 400 at the port 3 of port circulator A filters out.In this way, by prime amplifying stage light channel structure and rear class amplification
Three port circulator A are added between grade light channel structure, and are arranged for filtering out SBS light at the port 3 of three port circulator A
Filtering structure can effectively filter out the excited Brillouin of main amplifier stage generation using the one-way conduction and filtering structure of circulator
Scatter light (SBS light).
Preferably, filtering structure is：High refractive index glue is coated at the port 3 of the three ports circulator A, or in institute
State the cavity that connection at the port 3 of three port circulator A is coated with absorbing material.
Narrow linewidth MOPA fiber amplifiers further include the amplification of the pumping source for driving each amplifying stage light channel structure
Stage drive circuit, the seed source driving circuit for driving seed source and the control circuit that aforementioned each driving circuit is controlled
500。
The operation principle of above-mentioned narrow linewidth MOPA fiber amplifiers is as follows：
There is three port circulator A one-way conduction, signal light can only be passed from 1 → port of port 2,2 → port of port 3
It is defeated, and it is unable to reverse transfer.
The seed light of seed source output first passes around pre-amplification stage light channel structure and carries out power pre-amplification, by three port rings
The port of shape device A 1. → port 2. enter the main amplification light channel structure of level-one, pass through control circuit change the main amplification light path knot of level-one
The average output power of structure, since the signal light power of main amplifier stage light channel structure amplification is high, peak power reaches tens of kilowatt, light
SBS effects are easy tod produce in fibre.The transmission direction of SBS light and the direction of signal light of generation on the contrary, three port circulator A list
Ensure that SBS light can only be transmitted through 2 → port of port 3 of circulator 2 to conduction, without being transmitted from 2 → port of port 1,
Filtering structure (for example high refractive index glue is coated at the port 3 of three port circulator A) is arranged at port 3 to be effectively filtered out
SBS light avoids its influence to pre-amplification stage.
Similarly, level-one it is main amplification light channel structure output signal light by next three ports circulator A port 1. →
2. port enters the main amplification light channel structure of two level, increase the average output work of the main amplification light channel structure of two level by control circuit
Rate, and port of the SBS light through circulator 2 that the main amplification light channel structure of two level generates 2. → 3. port is filtered out, and so on, N
Reversed SBS light being filtered out by three port circulator of n-th that the main amplification light channel structure of grade generates.Such as in three ports annular
High refractive index glue is coated at the port 3 of device A, allow to be formed final products effectively filter out reversed SBS light, avoid it to putting in advance
The influence of big grade.
In order to be more clearly understood that the technology contents of the utility model, spy are lifted following embodiment and are described in detail, mesh
Be only that the content for being best understood from the utility model and unrestricted the scope of protection of the utility model.In following embodiments at least
Two-stage amplifying stage light channel structure is to amplify light path knot by the two-stage that pre-amplification stage light channel structure and main amplifier stage light channel structure form
Structure, but not limited to this, or other multi-amplification stage light channel structures.
Embodiment 1
As shown in Fig. 2, a kind of narrow linewidth MOPA fiber amplifiers, including pre-amplification stage light channel structure and main amplifier stage light path
Structure, pre-amplification stage light channel structure include seed source 110, pumping source A111, bundling device A112 and gain fibre A113；Main amplification
Grade light channel structure includes pumping source B114, bundling device B115, gain fibre B116 and output end 117；Seed source and pumping source A with
The input terminal of bundling device A is connected, and the output end of bundling device A is connected with one end of gain fibre A, and gain fibre A's is another
End is connected with the port 1 of three port circulator A300；Pumping source B is connected with the input terminal of bundling device B, and bundling device B's is defeated
Outlet is connected with one end of gain fibre B, and the other end of gain fibre B is connected with the port 2 of three port circulator A；Three
Filtering structure for filtering out SBS light is set at the port 3 of port circulator A, such as at the port 3 of three port circulator A
Coat high refractive index glue or.
Preferably, it is connected with narrow band filter between the pre-amplification stage light channel structure and the main amplifier stage light channel structure
118.Narrow band filter is used to filter out spontaneous radiation (ASE) light of pre-amplification stage generation.If the ASE light that pre-amplification stage generates does not have
It filters out, then ASE light can continue to amplify with main amplifier stage, it will this can reduce the signal-to-noise ratio of output laser, limit seed source
The amplification of signal light.
Preferably, gain fibre A is single mode Er-doped fiber, and seed source is the 1550nm semiconductor lasers of direct electrical modulation
Device, pumping source A are 980nm single mode semiconductor lasers, and pumping source B is 950nm single mode semiconductor lasers, and gain fibre B is
Double clad erbium-ytterbium co-doped fiber.
The utility model narrow linewidth MOPA fiber amplifiers further include the pumping source for driving each amplifying stage light channel structure
Amplification stage drive circuit, the seed source driving circuit for driving seed source and the control that aforementioned each driving circuit is controlled
Circuit processed.
Embodiment 2
As shown in figure 3, a kind of narrow linewidth MOPA fiber amplifiers, including pre-amplification stage light channel structure and main amplifier stage light path
Structure, pre-amplification stage light channel structure include seed source 210, three port circulator B211, the first gain fibre 212, wavelength-division multiplex
Device 213, broadband optical fiber speculum 214 and the first pumping source 215；Main amplifier stage light channel structure includes the second gain fibre 216, closes
Beam device 217, the second pumping source 218 and output end 219；The output end of seed source is connected with the port 1 of three port circulator B,
The port 2 of three port circulator B is connected with one end of the first gain fibre, and the other end of the first gain fibre is sequentially connected wave
Division multiplexer and broadband optical fiber speculum, the first pumping source are connected in a manner of backward pump with wavelength division multiplexer, three ports
The port 3 of circulator B is connected with the port 1 of three port circulator A300；One end of second gain fibre and three ports annular
The port 2 of device A is connected, and the other end of the second gain fibre is sequentially connected bundling device and output end, and the second pumping source is with backward
Pump mode is connected with bundling device, and the filtering structure for filtering out SBS light is arranged at the port 3 of three port circulator A, (ratio
High refractive index glue is coated such as at the port 3 of three port circulator A).Preferably, pre-amplification stage light channel structure further includes tunable
Filter 220, tunable optic filter are connected between wavelength division multiplexer and broadband optical fiber speculum.
In above structure, by adding three port circulator A between pre-amplification and main amplifier stage, and in three ports annular
Filtering structure (for example high refractive index glue is coated at the port 3 of three port circulator A) is set at the port 3 of device A.Utilize annular
The one-way conduction and filtering structure of device can effectively filter out the stimulated Brillouin scattering light (SBS light) of main amplifier stage generation, to
Avoid its influence to preceding amplifying stage.And its essence is a kind of pre-amplification knots of single-stage round trip for above-mentioned pre-amplification stage light channel structure
Structure, port 1 and port 2 of the seed light through three port circulator B are input in the first gain fibre, are then reflected through broadband optical fiber
After mirror effect, seed light can obtain higher gain again by the first gain fibre, therefore, be put in advance by this round trip
Big structure can save gain fibre length, increase light-phototranstormation efficiency, to improve amplification energy of the gain fibre to small signal
Power ensures the high-fidelity amplification of subnanosecond laser pulse；And in pre-amplification stage light channel structure, in broadband optical fiber speculum and wavelength-division
It is connected with tunable optic filter between multiplexer, it can be achieved that the adjustable filtering of passband width, to filter out the ASE light of one way amplification,
It effectively avoids being lost caused by filter (such as narrow linewidth filter) and seed source bandwidth mismatch；And first pumping source adopt
With backward pump mode, it can effectively inhibit ASE effects, while improving output power；Therefore, the utility model also overcomes small letter
The problems such as number amplification is difficult, gain fibre is long；ASE light in small signal pulse amplification process is overcome simultaneously and accumulates problem, greatly
Amplitude improves output power.The utility model output power is high, and number of stages of amplification is few, compact-sized, and cost is relatively low to be easy to business
Metaplasia is produced.
Preferably, be connected between the second gain fibre and the port 3 of three port circulator B cladding pumping mode stripper 221,
Bandpass filter 222 and fiber mode adaptation 225.In this way, main amplifier stage light path is effectively improving output by backward pumping
When power, extra pump light can be filtered out by cladding pumping mode stripper, prevent its damage to preventing big grade light channel structure.
Cladding pumping mode stripper can be substituted, directly prevents its right to filter out extra pump light in fusion point coating high refractive index glue
The influence of prime enlarged structure.Bandpass filter can be narrow band filter or broadband filter, be generated for filtering out pre-amplification stage
Spontaneous radiation (ASE) light.If the ASE light that pre-amplification stage generates does not filter out, ASE light can continue to put with main amplifier stage
Greatly, this can reduce the signal-to-noise ratio of output laser, limit the amplification of signal light.The gain fibre of pre-amplification stage and the increasing of main amplifier stage
Beneficial fiber type is different, and fiber mode adaptation (MFA) is inserted between two-stage, can reduce splice loss, splice attenuation between two-stage and
Mode Coupling is lost, and improves beam quality.
Preferably, the first gain fibre is single mode Er-doped fiber or Er/Yb co-doped fibers, and seed source is direct electrical modulation
1550nm semiconductor lasers or 1550nm Q-switched lasers, seed source use the semiconductor laser (LD) of direct electrical modulation,
Centre wavelength is 1550.98nm, and the pulse width of bandwidth 2.5GHz, modulated output are 519 ± 0.6ps, and repetition rate exists
It is continuously adjusted within the scope of 10KHz-2MHz.
First pumping source is 980nm single mode semiconductor lasers, and wavelength division multiplexer is 980nm/1550nm wavelength division multiplexers,
Second pumping source is 975nm multimode semiconductor lasers, and the second gain fibre is double clad erbium-ytterbium co-doped fiber.In this way, 980nm
Pump light is coupled into single mode er-doped (Er) optical fiber through 980nm/1550nm wavelength division multiplexers (WDM), and pump light and signal light can be all
It is propagated in fibre core, to improve pump conversion efficiency.Er/Yb co-doped fibers can overcome concentration quenching existing for Er-doped fiber to imitate
It answers, improves the pump conversion efficiency of gain fibre, to improve output power.
Preferably, narrow linewidth MOPA fiber amplifiers further include putting for the pumping source for driving each amplifying stage light channel structure
Big stage drive circuit, the seed source driving circuit for driving seed source and the control electricity that aforementioned each driving circuit is controlled
Road.
Preferably, the output end is connected with isolator 223 and collimating mirror 224.In this way, isolator is terminated in output, it can
Parasitic laser generation is generated to prevent the Fresnel reflection in not-go-end face, then connects optical fiber collimator, it is ensured that the collimation of laser
Light extraction.
Preferably, further include for driving the pre-amplification stage driving circuit of the single mode semiconductor laser, for driving
The seed source driving circuit of the seed source, the main amplifier stage driving circuit for driving the multimode semiconductor laser and right
The control circuit that aforementioned each driving circuit is controlled.The stability of seed source light pulse depends on the precision of modulation circuit, institute
It is influenced less with general mechanical oscillation；The stability of seed source wavelength is related with temperature, is controlled by accurate temperature
Circuit can guarantee the stability of seed source wavelength, and be effectively guaranteed laser stablizes amplification.
Preferably, it is connected with isolator between the seed source and the three ports circulator B.In this way, isolator plays
Protect the effect of seed source.
The course of work and principle of the present embodiment 2 are as follows：
Port 1 and port 2 of the seed light through three port circulator B of the semiconductor laser output of direct electrical modulation are successively
It is input in single mode Er-doped fiber, tunable optic filter and fiber reflector, then the effect through fiber reflector, seed light two
It is secondary by single mode Er-doped fiber to obtain higher gain.The one-way conduction characteristic of three port circulator B can prevent reversely
The light injury seed source of transmission.Pre-amplification stage passes through 980/ using 980nm single mode semiconductor lasers (Pump1) as pumping source
1550nm wavelength division multiplexers (WDM) will be in coupling pump light to single mode Er-doped fiber.Seed light passes through after round trip pre-amplification
The port 3 of three port circulator B, the port 1 of three port circulator A and port 2 are incident in main amplifier stage light channel structure.Master is put
Port of the SBS light through three port circulator A that big grade light channel structure generates 2. → 3. port filtered out, avoid it to pre-amplification
The influence of grade.The pump light that main amplifier stage is exported 975nm multimode semiconductor lasers by the way of backward pumping, passes through one
A (2+1) × 1 bundling device is coupled into one section of double clad erbium-ytterbium co-doped fiber, due to the optical fiber class of pre-amplification stage and main amplifier stage
Type is different, and fiber mode adaptation (MFA) is inserted between two-stage to reduce the splice loss, splice attenuation and Mode Coupling damage between two-stage
Beam quality is consumed while being improved, and coats high refractive index glue at the second gain fibre and the fusing point of pattern matcher and carries out pumping
(PS) is filtered out, prevents unabsorbed 980nm pump lights from causing to damage to prime device.The vacant pump of the bundling device of main amplifier stage
Pu endpoint applies high folding glue, and output termination isolator prevents the Fresnel reflection of end face from generating parasitic laser generation, then connects optical fiber
Collimator ensures the collimation light extraction of laser.
In the present embodiment 2, seed source, the gain fibre of pre-amplification stage and pre-amplification stage WDM can depending on practical application,
Such as 1550nm lasers：Seed source can be 1550nm semiconductor lasers or 1550nm Q-switched lasers；Gain fibre is single mode
Er fibres or Er/Yb co-doped fibers；WDM corresponds to 980nm mode pumps source, and (N+1) × 1 bundling device corresponds to multimode pumping source
(915,950,975nm etc.).Such as 1064nm lasers：Seed source is 1064nm semiconductor lasers or 1064nm Q-switched lasers；
Gain fibre is double-cladding-Yb doped fiber；(N+1) × 1 bundling device；Pumping source is multimode 915,950,975nm semiconductor lasers
Deng.
Above example is that the preferred embodiment of the utility model is described in detail with reference to attached drawing.The skill of this field
Art personnel are by carrying out above-described embodiment modification or change on various forms, but the feelings of the essence without departing substantially from the utility model
Under condition, all fall within the scope of the present invention.
Claims (8)
1. a kind of narrow linewidth MOPA fiber amplifiers, it is characterised in that：Including at least two-stage amplifying stage light channel structure and set on two
Three port circulator A between grade amplifying stage light channel structure；The signal light of prime amplifying stage light channel structure output is through three end
The port 1 and port 2 of mouth circulator A enters in rear class amplifying stage light channel structure, and rear class amplifying stage light channel structure generates reversed
Port 2 of the SBS light through the three ports circulator A is transmitted to port 3, and is located at the port 3 of the three ports circulator A
Filtering structure filter out.
2. narrow linewidth MOPA fiber amplifiers according to claim 1, it is characterised in that：The filtering structure is：Institute
Coating high refractive index glue at the port 3 of three port circulator A is stated, or connects and applies at the port 3 of the three ports circulator A
There is the cavity of absorbing material.
3. narrow linewidth MOPA fiber amplifiers according to claim 1, it is characterised in that：At least two-stage amplifying stage light path knot
Structure is to amplify light channel structure by the two-stage that pre-amplification stage light channel structure and main amplifier stage light channel structure form.
4. narrow linewidth MOPA fiber amplifiers according to claim 3, it is characterised in that：The pre-amplification stage light channel structure
Including seed source, pumping source A, bundling device A and gain fibre A；The main amplifier stage light channel structure includes pumping source B, bundling device
B, gain fibre B and output end；The seed source and the pumping source A are connected with the input terminal of the bundling device A, the conjunction
The output end of beam device A is connected with one end of the gain fibre A, the other end and three port ring of the gain fibre A
The port 1 of shape device A is connected；The pumping source B is connected with the input terminal of the bundling device B, the output of the bundling device B
End is connected with one end of the gain fibre B, the port 2 of the other end of the gain fibre B and the three ports circulator A
It is connected, narrow band filter is connected between the pre-amplification stage light channel structure and the main amplifier stage light channel structure.
5. narrow linewidth MOPA fiber amplifiers according to claim 3, it is characterised in that：The pre-amplification stage light channel structure
Including seed source, three port circulator B, the first gain fibre, wavelength division multiplexer, broadband optical fiber speculum and the first pumping source；
The main amplifier stage light channel structure includes the second gain fibre, bundling device, the second pumping source and output end；The seed source it is defeated
Outlet is connected with the port 1 of the three ports circulator B, port 2 and the first gain light of the three ports circulator B
Fine one end is connected, and the other end of first gain fibre is sequentially connected the wavelength division multiplexer and the broadband optical fiber is anti-
Mirror is penetrated, first pumping source is connected in a manner of backward pump with the wavelength division multiplexer, the three ports circulator B's
Port 3 is connected with the port 1 of the three ports circulator A；One end of second gain fibre and three port annular
The port 2 of device A is connected, and the other end of second gain fibre is sequentially connected the bundling device and the output end, described
Second pumping source is connected with backward pump mode with the bundling device.
6. narrow linewidth MOPA fiber amplifiers according to claim 5, it is characterised in that：The pre-amplification stage light channel structure
Further include tunable optic filter, the tunable optic filter be connected to the wavelength division multiplexer and the broadband optical fiber speculum it
Between.
7. narrow linewidth MOPA fiber amplifiers according to claim 5, it is characterised in that：First gain fibre is single
Mould Er-doped fiber, the seed source are the 1550nm semiconductor lasers of direct electrical modulation, and first pumping source is that 980nm is mono-
Mould semiconductor laser, the wavelength division multiplexer are 980nm/1550nm wavelength division multiplexers, and second pumping source is that 975nm is more
Mould semiconductor laser, second gain fibre are double clad erbium-ytterbium co-doped fiber.
8. narrow linewidth MOPA fiber amplifiers according to claim 4 or 5, it is characterised in that：Further include for driving
State amplification stage drive circuit, the seed source driving circuit for driving the seed source of the pumping source of each amplifying stage light channel structure
With the control circuit controlled aforementioned each driving circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820060343.0U CN207719582U (en) | 2018-01-15 | 2018-01-15 | Narrow linewidth MOPA fiber amplifiers |
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| CN201820060343.0U CN207719582U (en) | 2018-01-15 | 2018-01-15 | Narrow linewidth MOPA fiber amplifiers |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994451A (en) * | 2018-01-15 | 2018-05-04 | 山东大学 | Narrow linewidth MOPA fiber amplifiers and the method for detecting SBS light |
| CN109378687A (en) * | 2018-10-29 | 2019-02-22 | 中国人民解放军国防科技大学 | Stimulated Brillouin scattering suppression method for optical fiber laser amplifier system |
| CN117691444A (en) * | 2024-02-04 | 2024-03-12 | 中国工程物理研究院激光聚变研究中心 | Multistage multiplexing narrow linewidth fiber laser pre-amplification structure |
-
2018
- 2018-01-15 CN CN201820060343.0U patent/CN207719582U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994451A (en) * | 2018-01-15 | 2018-05-04 | 山东大学 | Narrow linewidth MOPA fiber amplifiers and the method for detecting SBS light |
| CN109378687A (en) * | 2018-10-29 | 2019-02-22 | 中国人民解放军国防科技大学 | Stimulated Brillouin scattering suppression method for optical fiber laser amplifier system |
| CN109378687B (en) * | 2018-10-29 | 2019-10-29 | 中国人民解放军国防科技大学 | Stimulated Brillouin scattering suppression method for optical fiber laser amplifier system |
| CN117691444A (en) * | 2024-02-04 | 2024-03-12 | 中国工程物理研究院激光聚变研究中心 | Multistage multiplexing narrow linewidth fiber laser pre-amplification structure |
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