CN108832470A - A kind of optical fiber laser - Google Patents
A kind of optical fiber laser Download PDFInfo
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- CN108832470A CN108832470A CN201810569460.4A CN201810569460A CN108832470A CN 108832470 A CN108832470 A CN 108832470A CN 201810569460 A CN201810569460 A CN 201810569460A CN 108832470 A CN108832470 A CN 108832470A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention discloses a kind of optical fiber lasers.Including：N number of pumping semiconductor laser, bundling device, the first Active Optical Fiber, the second Active Optical Fiber, the first reflecting grating and the second reflecting grating；Bundling device is used for the pumping combiner by N number of pumping semiconductor laser output at a branch of；A part of pump light after closing beam enters in the second Active Optical Fiber, motivates to the second Active Optical Fiber；Another part enters in the first Active Optical Fiber, and oscillation enters the second Active Optical Fiber after forming seed laser in the resonator that the first reflecting grating and the second reflecting grating are formed；It is exported after carrying out power amplification in the second Active Optical Fiber of seed laser upon actuation.In the inventive solutions, the pump light source structure of the oscillator stage of seed light and amplifying stage is designed to integration, reduce the complexity that the usage quantity of pumping source is connected with laser internal component, it reduces costs, nonlinear effect is inhibited, the output power of optical fiber laser is improved.
Description
Technical field
The present invention relates to field of laser device technology, and in particular to a kind of optical fiber laser.
Background technique
Optical fiber industry mostly uses main oscillations power to put in the market in order to realize high power laser light output in single fiber at present
The optical fiber laser of big structure, it includes：Seed laser forms part and power amplifying part, but existing optical fiber laser is deposited
In shortcomings.Firstly, it is necessary to complicated automatically controlled logic is controlled, for example, laser must first open seed laser when opening,
After seed laser is stablized, power-amplifier stage could be opened；In laser shutdown, it is necessary to first close power-amplifier stage, determine
Cheng Hou could close seed laser.If deviation occur in operation logic mistake or control, it will lead in power-amplifier stage and generate
Stronger laser self oscilaltion, burns out gain fibre, or even burns out whole light path devices.Secondly, in seed laser light source and function
Respectively using pumping semiconductor laser in rate amplifying stage, and using different driving circuits and complicated control circuit, cause
Because the device used is more, lead to increased costs.Again, because using pumping/signal light between seed light source and power-amplifier stage
Fine bundling device, when being prepared by fused biconical taper technology, it is not easy to realize the fibre core mould field of Injection Signal optical fiber and output optical fibre
Match, is easy the generation of excitation higher order mode, limits the output power of optical fiber.Therefore, a kind of light to solve the above problems is needed
The appearance of fibre laser.
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind
State a kind of optical fiber laser of problem.
According to one aspect of the present invention, a kind of optical fiber laser is provided, the optical fiber laser includes：N number of pumping
Semiconductor laser, bundling device, the first Active Optical Fiber, the second Active Optical Fiber, the first reflecting grating and the second reflecting grating；
First Active Optical Fiber is placed between the first reflecting grating and the second reflecting grating, wherein the first reflecting grating it is anti-
Rate is penetrated higher than the second reflecting grating；
The bundling device is used for the pumping combiner by N number of pumping semiconductor laser output at a branch of；
A part of pump light after the conjunction beam enters in second Active Optical Fiber, to second Active Optical Fiber
It is motivated；
Pump light another part after the conjunction beam enters in first Active Optical Fiber, in the first reflecting grating and
Oscillation enters the second Active Optical Fiber after forming seed laser in the resonator that two reflecting gratings are formed；The seed laser is motivating
It is exported after carrying out power amplification in the second Active Optical Fiber afterwards.
Optionally, the bundling device is the pump combiner of N × 1；The placement position for the component that the optical fiber laser includes
It is followed successively by：N number of pumping semiconductor laser, the pump combiner of N × 1, the first reflecting grating, the first Active Optical Fiber, the second reflection
Grating, the second Active Optical Fiber.
Optionally, the bundling device is (N+1) × 1 pumping/signal bundling device；The component that the optical fiber laser includes
Placement position is followed successively by：N number of pumping semiconductor laser, (N+1) × 1 pumping/signal bundling device, the second Active Optical Fiber, second
Reflecting grating, the first Active Optical Fiber, the first reflecting grating.
Optionally, the optical fiber laser further includes：Transition optical fiber, the transition optical fiber be placed on the second reflecting grating and
Between second Active Optical Fiber, the transition optical fiber is for seed laser to be coupled in second Active Optical Fiber.
Optionally, the optical fiber laser further includes：Cladding light stripper, for filtering out the defeated of second Active Optical Fiber
Cladding light out.
Optionally, mixed with gain ion in first Active Optical Fiber and second Active Optical Fiber.
Optionally, the gain ion can be one of following or a variety of, ytterbium, erbium, thulium, holmium, neodymium.
Optionally, the first Active Optical Fiber core diameter is less than or equal to the core diameter of second Active Optical Fiber,
The first Active Optical Fiber cladding diameter is equal to or more than the cladding diameter of second Active Optical Fiber.
The technical solution of the present invention is to provide a kind of optical fiber lasers to include：N number of pumping semiconductor laser closes beam
Device, the first Active Optical Fiber, the second Active Optical Fiber, the first reflecting grating and the second reflecting grating；First Active Optical Fiber is placed in first
Between reflecting grating and the second reflecting grating, the bundling device is used for the pumping of N number of pumping semiconductor laser output is photosynthetic
Beam is at a branch of；A part of pump light after the conjunction beam enters in second Active Optical Fiber, to second active light
Fibre is motivated；Another part enters in the first Active Optical Fiber, is formed in the first reflecting grating and the second reflecting grating humorous
Oscillation enters the second Active Optical Fiber after forming seed laser in vibration device；In the second Active Optical Fiber of the seed laser upon actuation
It is exported after carrying out power amplification.By the technical program, the usage quantity of pumping source and bundling device can be reduced, reduces passive light
Fine use inhibits nonlinear effect, reduces costs.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
Fig. 1 shows the structural schematic diagram of according to embodiments of the present invention 1 optical fiber laser；
Fig. 2 shows the structural schematic diagrams of according to embodiments of the present invention 2 optical fiber laser.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
In the present embodiment, a kind of optical fiber laser is provided, including：N number of pumping semiconductor laser 110, bundling device
120, the first reflecting grating 130, the first Active Optical Fiber 140, the second reflecting grating 150, the second Active Optical Fiber 160.
First Active Optical Fiber 140 is placed between the first reflecting grating 130 and the second reflecting grating 150, wherein the first reflection
The reflectivity of grating 130 is higher than the second reflecting grating 150；Bundling device 120 is for exporting N number of pumping semiconductor laser 110
Pumping combiner at a branch of；A part of pump light after closing beam enters in the second Active Optical Fiber 160, to the second active light
Fibre 160 is motivated；Pump light another part after closing beam enters in the first Active Optical Fiber, in 130 He of the first reflecting grating
Oscillation enters the second Active Optical Fiber 160 after forming seed laser in the resonator that second reflecting grating 150 is formed；Seed laser exists
It is exported after carrying out power amplification in the second Active Optical Fiber 160 after excitation.
In the present embodiment, the first reflecting grating 130 and the second reflecting grating 150 form a resonator, and first is active
140 resonator of optical fiber is equivalent to seed light oscillator stage, and pump light will become seed in 140 resonator of the first Active Optical Fiber
Laser, some pump light are not absorbed, into the second Active Optical Fiber, excitation of second Active Optical Fiber in pump light
Under, the power of seed laser is amplified.Transition optical fiber can also be increased between the second reflecting grating and the second Active Optical Fiber,
For seed laser to be expeditiously coupled in the second Active Optical Fiber, cladding light filter can be increased after laser power amplification
Except device, the cladding light of the output for filtering out the second Active Optical Fiber.
Bundling device in the present embodiment is divided into the pump combiner of N × 1 and (N+1) × 1 pumping/signal bundling device, because two
The structure of kind bundling device is different, so placement position of two kinds of bundling devices in optical fiber laser is different.
It is different in the inside placement position of optical fiber laser below according to two kinds of bundling devices, enumerate two different embodiments
Light transmission path inside optical fiber laser is illustrated.
Embodiment 1
In embodiment 1, as shown in Figure 1, bundling device is the pump combiner of N × 1 120-1；The portion that optical fiber laser includes
The placement position of part is followed successively by：N number of pumping semiconductor laser 110, the pump combiner of N × 1 120-1, the first reflecting grating
130, the first Active Optical Fiber 140, the second reflecting grating 150, transition optical fiber 170, the second Active Optical Fiber 160, cladding light stripper.
Wherein, what the N in the pump combiner of N × 1 120-1 was represented is N number of pumping semiconductor laser 110, the first reflection
The reflectivity of grating 130 is greater than the reflectivity of the second reflecting grating 150, it is preferable that the reflectivity of the first reflecting grating 130 is greater than
99%.The reflectivity of second reflecting grating 150 can be 5%-30%；In first Active Optical Fiber 140 and the second Active Optical Fiber 160
Mixed with gain ion, wherein gain ion can be to be one or more in ytterbium, erbium, thulium, holmium, neodymium plasma, in the present embodiment
In, the core diameter of the first Active Optical Fiber 140 selected is 10um, and cladding diameter 400um, numerical aperture is respectively 0.06 He
0.46 optical fiber；The core diameter of second Active Optical Fiber 160 is 20um, and cladding diameter 400um, numerical aperture is respectively 0.06 He
0.46 optical fiber, in addition, in the present embodiment 1, the first Active Optical Fiber 140 of selection and the cladding diameter of the second Active Optical Fiber 160
It can be other numerical value with core diameter, as long as the core diameter for meeting the first Active Optical Fiber 140, which is less than or equal to second, to be had
The core diameter of source optical fiber 160, the cladding diameter of the first Active Optical Fiber 140 are greater than or equal to the covering of the second Active Optical Fiber 160
Diameter.
In the present embodiment 1, the working principle of optical fiber laser is：The pump combiner of N × 1 120-1 is used for N number of pumping
The pumping combiner that semiconductor laser 110 exports is at a branch of；Close beam after pump light after the first reflecting grating 130,
It enters in the first Active Optical Fiber 140, the first Active Optical Fiber 140 forms population under the excitation for closing the pumping light power after beam
Reversion distribution, and under the resonator effect that the first reflecting grating 130 and the second reflecting grating 150 are constituted, realize selected wavelength
Laser generation output.It should be noted that the first Active Optical Fiber 140 and the first reflecting grating 130 and the second reflecting grating 150
The main oscillations laser structure for forming a standard, realizes the seed laser output of certain power, and seed laser is reflected from second
Grating 150 transmits the pump light for being injected into the fibre core of the second Active Optical Fiber 160, while not absorbed by the first Active Optical Fiber 140
Also it remains coupled in the second Active Optical Fiber 160, absorbed by the gain media in the second Active Optical Fiber 160 and forms stimulated radiation
The seed laser power generated in the first Active Optical Fiber 140 is amplified in the effect of light amplification, obtains high-power laser output.
In the end of the second Active Optical Fiber 160, increased cladding light stripper 180, for filtering out the second Active Optical Fiber 160
Output cladding light, to purify the beam quality of output laser, the second reflecting grating 150 and the second Active Optical Fiber 160 it
Between by setting transition optical fiber 170, can be the first Active Optical Fiber 140 and the second Active Optical Fiber 160 core diameter size
Between optical fiber, or conical fiber etc..The transition optical fiber 170 is used to seed laser being expeditiously coupled to second
In Active Optical Fiber 160, the basement membrane coupling loss between the first Active Optical Fiber 140 and the second Active Optical Fiber 160 is effectively reduced, is reduced
The excitation of higher order mode.
From above-mentioned principle it is found that the advantages of the present embodiment 1 is to only use the pump optical fiber combiner of N × 1, will own
Pumping light power be coupled to the main oscillations grade containing the first Active Optical Fiber, and unabsorbed pump light is transferred to containing
Pumping light power in the power-amplifier stage of two Active Optical Fibers, as power-amplifier stage.Only need the driving using same timing
Power supply reduces the driving of master oscillation power amplification grade, keeps control circuit simple to drive all pumping semiconductor lasers
Change.The driving current size of semiconductor laser can be pumped by adjusting, it is big to adjust the power of output of optical fiber laser
It is small, it is easy to operate.
Embodiment 2
In example 2, as shown in Fig. 2, bundling device is (N+1) × 1 pumping/signal bundling device 120-2, optical fiber laser
Including the placement position of component be followed successively by：N number of pumping semiconductor laser 110,
(N+1) × 1 pumping/signal bundling device 120-2, the second Active Optical Fiber 160, transition optical fiber 170, the second reflecting grating
150, the first Active Optical Fiber 140, the first reflecting grating 130.
Wherein, what the N in (N+1) × 1 pumping/signal bundling device 120-2 was represented is N number of pumping semiconductor laser 110,
The reflectivity of first reflecting grating 130 is greater than the reflectivity of the second reflecting grating 150, same as Example 1, in the present embodiment 2
Also the reflectivity for choosing the first reflecting grating 130 is greater than 99%.The reflectivity of second reflecting grating 150 is 5%-30%；First
Mixed with gain ion in Active Optical Fiber 140 and the second Active Optical Fiber 160, wherein gain ion can for ytterbium, erbium, thulium, holmium,
One or more in neodymium plasma, in the present embodiment, the core diameter of the first Active Optical Fiber 140 selected is 10um, covering
Diameter 400um, numerical aperture are respectively 0.06 and 0.46 optical fiber；The core diameter of second Active Optical Fiber 160 is 20um, covering
Diameter 400um, numerical aperture are respectively 0.06 and 0.46 optical fiber.In addition, in the present embodiment 2, the first active light of selection
The cladding diameter and core diameter of fibre 140 and the second Active Optical Fiber 160 can be other numerical value, as long as meeting the first active light
The core diameter of fibre 140 is less than or equal to the core diameter of the second Active Optical Fiber 160, the cladding diameter of the first Active Optical Fiber 140
More than or equal to the cladding diameter of the second Active Optical Fiber 160.
In the present embodiment 2, the working principle of optical fiber laser is：(N+1) × 1 pumping/signal bundling device 120-2 is used for
The pumping combiner that N number of pumping semiconductor laser 110 is exported is at a branch of；The second active light of process of pump light after closing beam
Fibre 160 reaches in the first Active Optical Fiber 140 after second reflecting grating 150, pump light of first Active Optical Fiber 140 after closing beam
Population inversion distribution, and the resonance constituted in the first reflecting grating 130 and the second reflecting grating 150 are formed under the excitation of power
Under device effect, the laser generation output of selected wavelength is realized.It should be noted that the first Active Optical Fiber 140 and the first reflected light
Grid 130 and the second reflecting grating 150 form the main oscillations laser structure of a standard, realize that the seed laser of certain power is defeated
Out, seed laser is injected into the fibre core of the second Active Optical Fiber 160 from the transmission of the second reflecting grating 150, while not being had by first
The pump light that source optical fiber 140 absorbs also remains coupled in the second Active Optical Fiber 160, by the gain in the second Active Optical Fiber 160
The seed laser power generated in the first Active Optical Fiber 140 is amplified in Absorption of Medium and the effect for forming stimulated radiation light amplification,
Obtain high-power laser output.
In the end (N+1) × 1 pumping/signal bundling device 120-2, by increasing cladding light stripper 180, for filtering out
The cladding light of the output of second Active Optical Fiber 160, to purify the beam quality of output laser, in the second reflecting grating 150 and the
The transition optical fiber 170 being arranged between two Active Optical Fibers 160 can be the fibre of the first Active Optical Fiber 140 and the second Active Optical Fiber 160
Optical fiber between core diameter size, or conical fiber etc..The transition optical fiber 170 is used for seed laser expeditiously
It is coupled in the second Active Optical Fiber 160, effectively reduces the basement membrane coupling between the first Active Optical Fiber 140 and the second Active Optical Fiber 160
Loss is closed, the excitation of higher order mode is reduced.
From above-mentioned principle it is found that the advantages of the present embodiment 2 is：Position is put by adjusting optical fiber laser internal components
It sets, can only be applicable in (N+1) × 1 pumping/signal bundling device, save the cost adjusts light by adjusting input current size
The output power of fibre laser makes easy to operate.
The technical scheme is that being provided with N number of pumping semiconductor laser, bundling device, in optical fiber laser
One Active Optical Fiber, the second Active Optical Fiber, the first reflecting grating and the second reflecting grating；Wherein, bundling device is used for N number of pumping half
The pumping combiner of conductor laser output is at a branch of；A part of pump light after closing beam enters in the second Active Optical Fiber,
Second Active Optical Fiber is motivated；Pump light another part after closing beam enters in the first Active Optical Fiber, in the first reflection
Oscillation enters the second Active Optical Fiber after forming seed laser in the resonator that grating and the second reflecting grating are formed；Seed laser exists
It is exported after carrying out power amplification in the second Active Optical Fiber after excitation.In the inventive solutions, by the oscillation of seed light
Grade and the pump light source structure of amplifying stage are designed to integration, reduce the usage quantity and laser internal component of pumping source
The complexity of connection, reduces costs, it is suppressed that nonlinear effect improves the output power of optical fiber laser.
Claims (8)
1. a kind of optical fiber laser, which is characterized in that the optical fiber laser includes：N number of pumping semiconductor laser closes beam
Device, the first Active Optical Fiber, the second Active Optical Fiber, the first reflecting grating and the second reflecting grating；
First Active Optical Fiber is placed between the first reflecting grating and the second reflecting grating, wherein the reflectivity of the first reflecting grating
Higher than the second reflecting grating；
The bundling device is used for the pumping combiner by N number of pumping semiconductor laser output at a branch of；
A part of pump light after the conjunction beam enters in second Active Optical Fiber, carries out to second Active Optical Fiber
Excitation；
Pump light another part after the conjunction beam enters in first Active Optical Fiber, anti-in the first reflecting grating and second
It penetrates after oscillation in the resonator of grating formation forms seed laser and enters the second Active Optical Fiber；The seed laser is upon actuation
It is exported after carrying out power amplification in second Active Optical Fiber.
2. optical fiber laser as described in claim 1, which is characterized in that
The bundling device is the pump combiner of N × 1；
The placement position for the component that the optical fiber laser includes is followed successively by：Beam is closed in N number of pumping semiconductor laser, the pumping of N × 1
Device, the first reflecting grating, the first Active Optical Fiber, the second reflecting grating, the second Active Optical Fiber.
3. optical fiber laser as described in claim 1, which is characterized in that
The bundling device is (N+1) × 1 pumping/signal bundling device；
The placement position for the component that the optical fiber laser includes is followed successively by：N number of pumping semiconductor laser, (N+1) × 1 are pumped
Pu/signal bundling device, the second Active Optical Fiber, the second reflecting grating, the first Active Optical Fiber, the first reflecting grating.
4. optical fiber laser as described in any one of claims 1-3, which is characterized in that the optical fiber laser further includes：It crosses
Optical fiber is crossed,
The transition optical fiber is placed between the second reflecting grating and the second Active Optical Fiber, and the transition optical fiber is for swashing seed
Optically coupling in second Active Optical Fiber.
5. optical fiber laser as described in any one of claims 1-3, which is characterized in that the optical fiber laser further includes：Packet
Layer light stripper, the cladding light of the output for filtering out second Active Optical Fiber.
6. optical fiber laser as described in any one of claims 1-3, which is characterized in that
Mixed with gain ion in first Active Optical Fiber and second Active Optical Fiber.
7. optical fiber laser as claimed in claim 6, which is characterized in that the gain ion can be one of following or
It is a variety of, ytterbium, erbium, thulium, holmium, neodymium.
8. optical fiber laser as described in claim 1, which is characterized in that
The first Active Optical Fiber core diameter is less than or equal to the core diameter of second Active Optical Fiber；
The first Active Optical Fiber cladding diameter is equal to or more than the cladding diameter of second Active Optical Fiber.
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| CN201810569460.4A CN108832470A (en) | 2018-06-05 | 2018-06-05 | A kind of optical fiber laser |
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Cited By (5)
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| CN110190495A (en) * | 2019-06-11 | 2019-08-30 | 深圳市创鑫激光股份有限公司 | The high power single fiber of closed-loop control exports continuous full-optical-fiber laser system |
| CN110556693A (en) * | 2019-09-20 | 2019-12-10 | 广东国志激光技术有限公司 | Optical fiber laser |
| CN111244736A (en) * | 2020-01-16 | 2020-06-05 | 中国科学院西安光学精密机械研究所 | Seed amplification pump sharing MOPA fiber laser and laser generation method |
| CN111431022A (en) * | 2020-03-04 | 2020-07-17 | 深圳市欧凌镭射科技有限公司 | Optical fiber amplifier and laser generator |
| CN115693372A (en) * | 2023-01-05 | 2023-02-03 | 济南邦德激光股份有限公司 | Fiber laser capable of suppressing Raman scattering and method |
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| CN111431022A (en) * | 2020-03-04 | 2020-07-17 | 深圳市欧凌镭射科技有限公司 | Optical fiber amplifier and laser generator |
| CN115693372A (en) * | 2023-01-05 | 2023-02-03 | 济南邦德激光股份有限公司 | Fiber laser capable of suppressing Raman scattering and method |
| CN115693372B (en) * | 2023-01-05 | 2023-09-22 | 济南邦德激光股份有限公司 | Fiber laser and method capable of inhibiting Raman scattering |
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Application publication date: 20181116 |