CN107248687A - A kind of middle-infrared band single-frequency single-polarization fiber laser - Google Patents
A kind of middle-infrared band single-frequency single-polarization fiber laser Download PDFInfo
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- CN107248687A CN107248687A CN201710458372.2A CN201710458372A CN107248687A CN 107248687 A CN107248687 A CN 107248687A CN 201710458372 A CN201710458372 A CN 201710458372A CN 107248687 A CN107248687 A CN 107248687A
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- Prior art keywords
- gain fibre
- fibre
- gain
- pumping
- fiber laser
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Classifications
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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
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
-
- 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
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
Abstract
The invention discloses a kind of middle-infrared band single-frequency single-polarization fiber laser, especially a kind of line chamber single-frequency laser, including：Pumping source；The output end welding of pumping optoisolator, its input and pumping source；Gain fibre component, the output end welding of its input and pumping optoisolator, gain fibre component includes fibre core, stress rods and the covering that is wrapped in outside fibre core and stress rods, and the fibre core of gain fibre component is germanate glass or germanic silicate glass, covering and stress rods are silicate glass；Single-mode polarization maintaining fiber, its input is with gain fibre component with 0 ° of angle to axle welding.So as to, the present invention shortens Resonant Intake System by the use of the highly doped gain fibre containing Ge as gain fibre, it not only further have compressed output laser linewidth, grating is also set directly to inscribe on gain fibre, and then improve efficient efficiency of laser is realized under extremely short gain length, and keep the stability of power output.
Description
Technical field
The present invention relates to field of lasers, more particularly to a kind of middle-infrared band single-frequency single-polarization fiber laser.
Background technology
Single frequency optical fiber laser (Fiber Laser) refers to doped rare earth element glass optical fiber as gain media, with reference to
Appropriate cavity structure realize narrow linewidth laser output, be widely used in laser communication, Fibre Optical Sensor, laser detection,
The fields such as laser radar.
Adopt short straight line chamber using in infrared single-frequency list polarization technology in existing more, but exist unit length gain it is relatively low,
The problems such as laser output power is low, linewidth narrowing is complicated, and have between gain fibre and conduction optical fiber, linewidth narrowing element
Multiple fusion points, loss is larger caused by the more meeting of fusion point, so that power output is unstable.
The content of the invention
The embodiment of the present invention solve at least existing by providing a kind of middle-infrared band single-frequency single-polarization fiber laser
The power output of technology middle-infrared band optical fiber laser is low, less stable technical problem.
A kind of single-frequency single-polarization fiber laser provided in an embodiment of the present invention, including：
Pumping source；
Pumping optoisolator, the output end welding of its input and the pumping source；
Gain fibre component, the output end welding of its input and the pumping optoisolator, the gain fibre component
Including fibre core, stress rods and the covering being wrapped in outside the fibre core and the stress rods, wherein, the gain fibre component
Fibre core is germanate glass or germanic silicate glass, and the covering and the stress rods are silicate glass；
Single-mode polarization maintaining fiber, its input is with the gain fibre component with 0 ° of angle to axle welding；
Wherein, the pumping source sends pump light, the pump light that the pumping optoisolator is sent to the pumping source every
After processing, it is injected into the gain fibre component and is amplified, the light obtained after amplifying through the gain fibre component is believed
Conducted in number injection single-mode polarization maintaining fiber.
Optionally, the refractive index of the fibre core is more than the refractive index of the covering, and the refractive index of the covering is more than described
The refractive index of stress rods.
Optionally, the stress rods coated in the gain fibre component include two, and the fibre core is located at two stress rods
Between.
Optionally, doping with rare-earth ions is in the fibre core：
One kind in single doping Tm, Ho, or one kind in codope Tm/Ho, Er/Tm, Yb/Tm, Er/Tm；
Wherein, the doping concentration of doping with rare-earth ions is more than 10 in the fibre core21/cm3。
Optionally, being inscribed on the fibre core of the gain fibre component has two sections of phase-shifted fiber gratings, wherein, two sections of phases
Reflectivity >=99% of one section of fiber grating in shifting fiber grating, the reflectivity of another section of fiber grating<50%.
Optionally, the centre wavelength of two sections of Bragg reflections optical fiber grating is respectively 1.8~2.1 μm.
Optionally, the length of two sections of Bragg reflections optical fiber grating is respectively 5~25mm.
Optionally, the pumping source is diode-end-pumped source or single-mode fiber laser pumping source.
The one or more technical schemes provided in the embodiment of the present invention, have at least the following technical effects or advantages：
By the input and gain fibre component of single-mode polarization maintaining fiber with 0 ° of angle to axle welding, using containing the highly doped of Ge
Gain fibre shortens Resonant Intake System, grating is directly inscribed on optical fiber, so as to further have compressed output laser rays
It is wide, additionally it is possible to reduce fusion point quantity, so that laser losses and caloric value can be reduced, and then, the present invention is realized can be in pole
Efficient efficiency of laser is realized under short gain length, and keeps the stability of power output.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, for this
For the those of ordinary skill of field, on the premise of not paying creative work, it can also obtain other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the structural representation of single-frequency single-polarization fiber laser provided in an embodiment of the present invention；
Fig. 2 is the end face structure figure of gain fibre component in Fig. 1；
Fig. 3 is the perspective view of gain fibre component in Fig. 1.
Embodiment
In view of at least to there is power output low, less stable for the middle-infrared band single frequency optical fiber laser of prior art
Technical problem, so the invention provides a kind of middle-infrared band single-frequency single-polarization fiber laser, general thought is as follows：
It is germanate glass by the fibre core of gain fibre component or germanic silicate glass, covering and stress rods is
Silicate glass, so that by the use of highly doped germanate optical fiber or the silicate fibers containing Ge are used as gain fibre.The present invention's is upper
State technical scheme and not only further have compressed laser output linewidth, additionally it is possible to realize that grating is directly inscribed on gain fibre, enter
And, efficient efficiency of laser can be realized under extremely short gain length, and the stability of power output is kept, of the invention is upper
Stating technical scheme also causes laser structure simpler, so that fusion point is less, and then can reduce laser losses and heating
Amount.
In order to be better understood from above-mentioned technical proposal, below in conjunction with Figure of description and specific embodiment to upper
Technical scheme is stated to be described in detail.
With reference to shown in Fig. 1~Fig. 3, the embodiment of the present invention provides a kind of middle-infrared band single-frequency single-polarization fiber laser,
Including：
Pumping source 1, pumping optoisolator 2, gain fibre component 3 and single-mode polarization maintaining fiber 4；Pumping optoisolator 2 it is defeated
Enter end and the output end welding of pumping source 1；The input of gain fibre component 3 and the output end welding of pumping optoisolator 2, increase
Beneficial optical fiber component 3 includes fibre core 31, stress rods 33, and the covering 32 being wrapped in outside fibre core 31 and stress rods 33；Single mode polarization-maintaining
The input of optical fiber 4 is with gain fibre component 3 with 0 ° of angle to axle welding；Wherein, pumping source 1 sends pump light, and pumping is optically isolated
It is injected into gain fibre component 3 and is amplified after the pump light isolation processing that device 2 is sent to pumping source 1, through gain fibre group
Conducted in the optical signal injection single-mode polarization maintaining fiber 4 that part 3 is obtained after amplifying.
The output end of pumping source and the input welding of fibre optic isolater 2, the pump light isolation processing sent to pumping source 1
Afterwards, it is to avoid disturbance of the echo of gain fibre component 3 to pump light.
Fibre core 31 is that germanate glass or germanic silicate glass, covering 32 and stress rods 33 are silicate glass,
The refractive index of fibre core 31 is more than the refractive index of covering 32, and the refractive index of covering 32 is more than the refractive index of stress rods 33.
Gain fibre component 3 is made up of fiber grating 34 and rear-earth-doped gain fibre, fibre core 31, covering 32 and stress
Rod 33 constitutes gain fibre, by using germanate glass or containing germanosilicate glass as gain fibre, can obtain high
Rear-earth-doped concentration, so as to be substantially reduced the length of gain fibre；Simultaneously because fibre core 31 contains germanium (Ge) element, the He of covering 32
Stress rods 33 are free of Ge element, so that it may directly grating is scribed on gain fibre, form gain fibre component 3, further
Reduce the chamber length (being shorter than 5cm) of laser cavity, so as to increase each longitudinal mode spacing of intracavitary, the final single longitudinal mode single polarizing for ensureing laser is defeated
Go out.
Specially：The stress rods 33 coated in gain fibre component 3 include two, fibre core 31 be located at two stress rods 33 it
Between, so that the structure for forming gain fibre component 3 is panda type.
Doping with rare-earth ions is single doping or codope in fibre core 31：For singly doping, the rare earth ion of single doping
One kind in Tm, Ho, for codope, one kind in rare earth ion Tm/Ho, Er/Tm, Yb/Tm, Er/Tm of codope；Need
It is noted that "/" here represents that "/" both front and back rare earth ion is mixed.The doping of doping with rare-earth ions in fibre core 31
Concentration is more than 1021/cm3, so as to ensure incremental in the unit length of great pump absorption efficiency and gain fibre component 3
Energy.
By the use of germanate glass or germanic silicate glass as gain fibre component 3, great list can be not only obtained
Bit length gain, and can directly inscribe grating in gain fibre
By using germanate glass or germanic silicate glass doping with rare-earth ions, multi-component polarization-maintaining light is formd
Fibre is as gain fibre component 3, and the species and change in concentration of rear-earth-doped ion are interval bigger, so that the embodiment of the present invention
The laser of offer can be extended to the use of 1.5~3 μm of middle-infrared band laser output.
Being inscribed with reference to shown in Fig. 3, on the fibre core 31 of gain fibre component 3 has two sections of bragg gratings 34 wherein, and two
Reflectivity >=99% of one section of fiber grating 34 in section bragg grating 34, is high reflective grid, another section of fiber grating
34 reflectivity<50%, export grating for low counter coupled.Grating is directly inscribed in gain fibre, so as to obtain narrower output
Line width.
Specifically, the centre wavelength of two sections of Bragg reflection optical fiber gratings 34 is respectively 1.8~2.1 μm.
Specifically, the length of two sections of Bragg reflection optical fiber gratings 34 is any length value in the range of 5~25mm.Compared with
Good, the length that can be two sections of Bragg reflection optical fiber gratings 34 is 25mm.
In specific implementation process, pumping source 1 is diode-end-pumped source or single-mode fiber laser pumping source.
The type of pumping source 1 used is determined by the doping type and mode of the Rare Earth Ion of fibre core 31：
If doping with rare-earth ions is single doping Tm or codope Tm/Ho in fibre core 31, pumping source 1 used is
792nm types optical fiber laser or 1560nm type optical fiber lasers.If doping with rare-earth ions is codope Yb/ in fibre core 31
One kind in Tm, Yb/Ho, Er/Tm, then pumping source 1 used is 976nm semiconductor lasers.If rare earth doped in fibre core 31
Ion is single doping Ho, then pumping source 1 used is 1120nm Raman fiber lasers.
By the one or more embodiments provided in the embodiment of the present invention, have at least the following technical effects or advantages：
Resonant Intake System is shortened using the highly doped gain fibre containing Ge, grating is directly inscribed on optical fiber, from
And further have compressed output laser linewidth, additionally it is possible to and fusion point quantity is reduced, so that laser losses and caloric value can be reduced,
And then, the present invention is realized can realize efficient efficiency of laser under extremely short gain length, and keep the steady of power output
It is qualitative.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (8)
1. a kind of middle-infrared band single-frequency single-polarization fiber laser, it is characterised in that including：
Pumping source；
Pumping optoisolator, the output end welding of its input and the pumping source；
Gain fibre component, the output end welding of its input and the pumping optoisolator, the gain fibre component includes
Fibre core, stress rods and the covering being wrapped in outside the fibre core and the stress rods, wherein, the fibre core of the gain fibre component
For germanate glass or germanic silicate glass, the covering and the stress rods are silicate glass；
Single-mode polarization maintaining fiber, its input is with the gain fibre component with 0 ° of angle to axle welding；
Wherein, the pumping source sends pump light, the optically isolated place of pumping that the pumping optoisolator is sent to the pumping source
After reason, it is injected into the gain fibre component and is amplified, the optical signal obtained after amplifying through the gain fibre component is noted
Enter and conducted in the single-mode polarization maintaining fiber.
2. middle-infrared band single-frequency single-polarization fiber laser as claimed in claim 1, it is characterised in that the folding of the fibre core
The refractive index that rate is more than the covering is penetrated, the refractive index of the covering is more than the refractive index of the stress rods.
3. middle-infrared band single-frequency single-polarization fiber laser as claimed in claim 2, it is characterised in that the gain fibre
The stress rods coated in component include two, and the fibre core is located between two stress rods.
4. single-frequency single-polarization fiber laser as claimed in claim 2 or claim 3, it is characterised in that rare earth doped in the fibre core
Ion is：
One kind in single doping Tm, Ho, or one kind in codope Tm/Ho, Er/Tm, Yb/Tm, Er/Tm；
Wherein, the doping concentration of doping with rare-earth ions is more than 10 in the fibre core21/cm3。
5. middle-infrared band single-frequency single-polarization fiber laser as claimed in claim 2, it is characterised in that the gain fibre
Being inscribed on the fibre core of component has two sections of Bragg reflection optical fiber gratings, wherein, in two sections of Bragg reflections optical fiber grating
Reflectivity >=99% of one section of fiber grating, the reflectivity of another section of fiber grating<50%.
6. middle-infrared band single-frequency single-polarization fiber laser as claimed in claim 5, it is characterised in that two sections of Bradleys
The centre wavelength of lattice fiber grating is respectively 1.8~2.1 μm.
7. the single-frequency single-polarization fiber laser as described in claim 5 or 6, it is characterised in that two sections of bragg fibers
The length of grating is 5~25mm.
8. middle-infrared band single-frequency single-polarization fiber laser as claimed in claim 1, it is characterised in that the pumping source is
Diode-end-pumped source or single-mode fiber laser pumping source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710458372.2A CN107248687A (en) | 2017-06-16 | 2017-06-16 | A kind of middle-infrared band single-frequency single-polarization fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710458372.2A CN107248687A (en) | 2017-06-16 | 2017-06-16 | A kind of middle-infrared band single-frequency single-polarization fiber laser |
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| CN201710458372.2A Pending CN107248687A (en) | 2017-06-16 | 2017-06-16 | A kind of middle-infrared band single-frequency single-polarization fiber laser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797737A (en) * | 2019-10-31 | 2020-02-14 | 西安交通大学 | Short straight cavity single-polarization single-longitudinal mode optical fiber laser and preparation method thereof |
| CN112421357A (en) * | 2020-10-08 | 2021-02-26 | 武汉光谷航天三江激光产业技术研究院有限公司 | Frequency modulation type semiconductor seed source for high-power optical fiber laser |
| CN115724584A (en) * | 2022-11-28 | 2023-03-03 | 中国电子科技集团公司第十一研究所 | Preparation method and application of rare earth ion doped multi-component silicate glass optical fiber |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797737A (en) * | 2019-10-31 | 2020-02-14 | 西安交通大学 | Short straight cavity single-polarization single-longitudinal mode optical fiber laser and preparation method thereof |
| CN112421357A (en) * | 2020-10-08 | 2021-02-26 | 武汉光谷航天三江激光产业技术研究院有限公司 | Frequency modulation type semiconductor seed source for high-power optical fiber laser |
| CN112421357B (en) * | 2020-10-08 | 2022-06-07 | 武汉光谷航天三江激光产业技术研究院有限公司 | Frequency modulation type semiconductor seed source for high-power optical fiber laser |
| CN115724584A (en) * | 2022-11-28 | 2023-03-03 | 中国电子科技集团公司第十一研究所 | Preparation method and application of rare earth ion doped multi-component silicate glass optical fiber |
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