CN207910227U - A kind of compound dual-cavity laser of all -fiber pulse - Google Patents
A kind of compound dual-cavity laser of all -fiber pulse Download PDFInfo
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- CN207910227U CN207910227U CN201721732396.4U CN201721732396U CN207910227U CN 207910227 U CN207910227 U CN 207910227U CN 201721732396 U CN201721732396 U CN 201721732396U CN 207910227 U CN207910227 U CN 207910227U
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Abstract
The utility model discloses a kind of compound dual-cavity lasers of all -fiber pulse, including pumping source, optical-fiber bundling device, the first gain fibre, the second gain fibre, transition optical fiber, the first reflection-type optical fiber Bragg grating, the second reflection-type optical fiber Bragg grating, third reflection-type optical fiber Bragg grating, the 4th reflection-type optical fiber Bragg grating, optoisolator, laser beam splitter.The utility model is using the optical fiber of rare earth doped element as gain media and saturable absorber, the core that is generated simultaneously using small core diameter gain fibre as pulse and ensure single mode operating, big core diameter gain fibre is as power amplifier, the influence of nonlinear effect, small core diameter and large core fiber can be reduced and realize that mould field is adapted to welding and is easy to bleach inner cavity acquisition burst pulse output by transition optical fiber；The utility model is also all optical fibre structure, has the characteristics that high stability, high power, high-energy, efficient.
Description
Technical field
The utility model belongs to laser technology and non-linear optical field, more particularly to a kind of compound two-chamber of all -fiber pulse
Laser
Background technology
High power, high-energy pulse optical fiber be considered as the development of future pulses laser with its plurality of advantages
Trend has begun to gradually replace conventional laser in many fields at present.High-energy nanosecond pulse optical fiber laser is answered extensively
For laser machining, optical time domain reflectometer (OTDR), the generation of second harmonic, the fields such as military affairs.
At present in optical fiber laser, obtain pulse output method substantially there are two types of：One is mode locked fiber laser,
Its output pulse width is relatively narrow, generally picosecond even femtosecond magnitude；Second is Q adjusting optical fiber laser, and nanosecond or Asia may be implemented
Laser (giant-pulse) output of millisecond pulsewidth.In general, traditional Q-regulating method is that acousto-optic, electrooptic modulator or solid-state is added
Saturable absorber is realized, however optical fiber combine with non-optical fibre device can increase system complexity, is influenced system stability and is resisted
Environmental disturbances ability is unfavorable for industrialization and practical popularization, therefore the nanosecond pulse optical fiber of the high-energy of all-fiber, high-energy
The realization of laser has great importance.
Utility model content
Problem to be solved in the utility model is, defeated in order to obtain high power, high-energy, the nanosecond pulse of high light beam quality
Go out, while avoiding the use of spaced members or extra modulation device, a kind of compound dual-cavity laser of all -fiber pulse is provided, utilization is small
Core that core diameter gain fibre is generated as pulse and ensure that single mode operates, big core diameter gain fibre as power amplifier,
The influence of nonlinear effect, small core diameter and large core fiber can be reduced and realize that mould field is adapted to welding and is easy to float by transition optical fiber
White inner cavity obtains burst pulse output.
To achieve the above object, the utility model adopts the following technical solution：
A kind of compound dual-cavity laser of all -fiber pulse, including：Pumping source, optical-fiber bundling device, the first gain fibre, second
Gain fibre, transition optical fiber, the first reflection-type optical fiber Bragg grating, the second reflection-type optical fiber Bragg grating, third reflection
Type fiber bragg grating, the 4th reflection-type optical fiber Bragg grating, optoisolator；Wherein, the pumping source connection optical fiber closes
The pumping input terminal of beam device；One end of the signal end connection transition optical fiber of optical-fiber bundling device；The other end connection the of transition optical fiber
One end of one reflection-type optical fiber fiber Bragg grating；The other end of first reflection-type optical fiber Bragg grating connects the first gain
One end of optical fiber；The other end of first gain fibre connects one end of the second reflection-type optical fiber Bragg grating；Second reflection-type
One end of the other end connection third reflection-type optical fiber Bragg grating of fiber bragg grating；The common end of optical-fiber bundling device connects
Connect one end of the second gain fibre；The other end of second gain fibre connects one end of the 4th reflection-type optical fiber Bragg grating；
Third reflection-type optical fiber Bragg grating and the 4th reflection-type optical fiber Bragg grating constitute the first resonant cavity；First reflection type optical
Fine Bragg grating and the second reflection-type optical fiber Bragg grating constitute the second resonant cavity；The pump light that pumping source generates passes through light
The pumping input terminal of fine bundling device enters in the first resonant cavity, is pumped to the second gain fibre, and the laser of formation is through light
Fine bundling device, the first reflection-type optical fiber Bragg grating enter in the second resonant cavity, and pumping generation is carried out to the first gain fibre
Another wavelength laser, another wavelength laser that the second resonant cavity generates is successively through optical-fiber bundling device, the second gain fibre, the
Four reflection-type optical fiber Bragg gratings, optoisolator output.
Preferably, the first reflection-type optical fiber Bragg grating, the second reflection-type optical fiber Bragg grating, third
Reflection-type optical fiber Bragg grating, the 4th reflection-type optical fiber Bragg grating reflectivity be R, wherein 0<R<1.
Preferably, the optical-fiber bundling device can be placed on the 4th reflection-type optical fiber Bragg grating and optoisolator it
Between.
A kind of compound dual-cavity laser of all -fiber pulse, which is characterized in that including：Pumping source, optical-fiber bundling device, first increase
Beneficial optical fiber, the second gain fibre, transition optical fiber, the first reflection-type optical fiber Bragg grating, laser beam splitter, the 4th reflection type optical
Fine Bragg grating, optoisolator；Wherein, the pumping input terminal of the pumping source connection optical-fiber bundling device；Optical-fiber bundling device
Signal end connects one end of transition optical fiber；The other end of transition optical fiber connects one end of the first gain fibre；First gain fibre
The other end connection laser beam splitter one end；Two output ends of the other end of laser beam splitter are connected directly to form the ring of light；Light
The common end of fine bundling device connects one end of the second gain fibre；The other end of second gain fibre connects the 4th reflection-type optical fiber
One end of Bragg grating；Laser beam splitter and the 4th reflection-type optical fiber Bragg grating constitute the first resonant cavity；First reflection
Type fiber bragg grating constitutes the second resonant cavity with laser beam splitter；The pump light that pumping source generates passes through optical-fiber bundling device
Pumping input terminal enters in the first resonant cavity, is pumped to the second gain fibre, and the laser of formation is through optical-fiber bundling device, the
One reflection-type optical fiber Bragg grating enter the second resonant cavity in, to the first gain fibre carry out pumping generate another wavelength swash
Light, another wavelength laser that the second resonant cavity generates is successively through optical-fiber bundling device, the second gain fibre, the 4th reflection-type optical fiber
Bragg grating, optoisolator output.
Preferably, the first reflection-type optical fiber Bragg grating, the 4th reflection-type optical fiber Bragg grating is anti-
The rate of penetrating is R, wherein 0<R<1.
Preferably, the optical-fiber bundling device can be placed on the 4th reflection-type optical fiber Bragg grating and optoisolator it
Between.
Preferably, the pumping source be semiconductor laser, solid state laser, gas laser, optical fiber laser,
Ramar laser is one such, exports the centre wavelength of pump light ranging from：700nm≤λ≤2000nm, the pumping
Mode be the single-ended pumping of fibre core, fibre core both-end pumping, covering it is single-ended pump, covering both-end pumping it is one such.
Preferably, the optical-fiber bundling device is (2+1) × 1 optical-fiber bundling device or (6+1) × 1 optical-fiber bundling device.
Preferably, first gain fibre, the second gain fibre are the polarization maintaining optical fibre or light mixed with rare earth element
Sub- crystal polarization maintaining optical fibre, the rare earth element of the doping be ytterbium (Yb), erbium (Er), holmium (Ho), thulium (Tm), neodymium (Nd), chromium (Cr),
Samarium (Sm), bismuth (Bi) are one such or several.
Preferably, the fibre of the second gain fibres of core diameter ＜ of the core diameter ＜ transition optical fibers of the first gain fibre
Core diameter.
Advantageous effect
The all-fiber pulse laser of the utility model resonant cavity crossmodulation has the following advantages：
1, the utility model, need not be outer using the optical fiber of rare earth doped element as gain media and saturable absorber
The additional modulation source in boundary, all optical fibre structure, design is simple, of low cost；
2, the utility model utilizes the intermodulation effect of resonant cavity, relative to traditional Q-switched laser, has higher
Output power and system stability；
3, the utility model design is simple, compact-sized, while can be with the big ultrashort arteries and veins of output stability height, pulse energy
Impulse light, it is easy to accomplish industrialization.
4, the utility model is matched using the doped fiber and transition optical fiber of different core diameters, has bigger energy and higher
Power output.
Description of the drawings：
Fig. 1 is the compound dual-cavity laser basic principle figure of 1 all -fiber pulse of embodiment；
Fig. 2 is the compound dual-cavity laser basic principle figure of 2 all -fiber pulse of embodiment；
Fig. 3 is the compound dual-cavity laser basic principle figure of 3 all -fiber pulse of embodiment；
Fig. 4 is the compound dual-cavity laser basic principle figure of 4 all -fiber pulse of embodiment；
In figure：1, pumping source；2, optical-fiber bundling device；3 first gain fibres；4, the second gain fibre；5, transition optical fiber；6、
First reflection-type optical fiber Bragg grating；7, the second reflection-type optical fiber Bragg grating；8, third reflection-type optical fiber Prague light
Grid；9, the 4th reflection-type optical fiber Bragg grating；10, optoisolator；0, laser beam splitter；
Specific implementation mode
With reference to diagram 1,2,3,4, the utility model is described in further detail, but is not limited only to following several embodiments.
Embodiment 1
A kind of compound dual-cavity laser structure of all -fiber pulse is as shown in Figure 1.1 is pumping source, cardiac wave in can be selected in figure
The semiconductor laser diode of a length of 976nm；2 be optical-fiber bundling device, can select (2+1) × 1 pump signal bundling device, such as
20/125 type；3 be rare earth doped fiber, and the Yb dosed optical fiber that the core diameter of Nufern companies of U.S. production is 10 microns can be selected；4
It is rare earth doped fiber, the Yb dosed optical fiber that the core diameter of Nufern companies of U.S. production is 20 microns can be selected；5 be transition light
The Transmission Fibers that the core diameter of CoActive companies of Canada production is 15 microns can be selected in fibre；6,7,8,9 be reflection type optical
Fine Bragg grating, optional high transoid and partially reflective grating, reflectivity R, wherein 0<R<1；10 be optoisolator, optional
Polarization independent optical isolator.
Pump light enters the second gain fibre 4 by the pumping end of optical-fiber bundling device 2, then reaches the 4th reflection type optical
Fine Bragg grating 9, the fiber bragg grating are high transoid grating, i.e. reflectivity R, R >=99%, the central wavelength is almost
All light can be reflected back, and pass through the second gain fibre 4, optical-fiber bundling device 2, transition optical fiber 5, the first reflection-type optical fiber cloth
Glug optical fiber 6, the first gain fibre 3 and the second reflection-type optical fiber Bragg grating 7 reach third reflection-type optical fiber Prague light
Grid 8, the fiber bragg grating are be all-trans type grating, i.e. reflectivity R, R >=99%, the almost all of light meeting of the central wavelength
It is reflected back.Third reflection-type optical fiber Bragg grating 8, the 4th reflection-type optical fiber Bragg grating 9 form the first resonant cavity.
The laser that first resonant cavity generates enters the first gain fibre 3 by the second reflection-type optical fiber Bragg grating 7, then reaches
First reflection-type optical fiber Bragg grating 6, the first reflection-type optical fiber Bragg grating 7 and the second reflection-type optical fiber Bragg grating
6 the second resonant cavities of composition.And first resonant cavity is initially formed laser generation under the excitation of pumping source 1, then to the second resonant cavity
It is pumped, exports the laser of another wavelength, pass sequentially through transition optical fiber (5), optical-fiber bundling device (2), the second gain fibre
(4), the 4th reflection-type optical fiber Bragg grating (9), optoisolator (10) output.
Embodiment 2
A kind of compound dual-cavity laser structure of all -fiber pulse is as shown in Fig. 2, basic structure is close with Fig. 1, by pumping source
(1) it is placed between the 4th reflection-type optical fiber Bragg grating (9) and optoisolator (10) with optical-fiber bundling device (2).
Embodiment 3
A kind of compound dual-cavity laser structure of all -fiber pulse is as shown in Figure 3.3 be pumping source, cardiac wave in can be selected in figure
The semiconductor laser diode of a length of 976nm；2 be optical-fiber bundling device, can select (2+1) × 1 pump signal bundling device, such as
20/125 type；3 be rare earth doped fiber, and the Yb dosed optical fiber that the core diameter of Nufern companies of U.S. production is 10 microns can be selected；4
It is rare earth doped fiber, the Yb dosed optical fiber that the core diameter of Nufern companies of U.S. production is 20 microns can be selected；5 be transition light
The Transmission Fibers that the core diameter of CoActive companies of Canada production is 15 microns can be selected in fibre；0 is laser beam splitter, can
Select the 50 of 2 × 1:The output end of one end two is connected, can have the function that total reflective mirror by the beam splitter of 50 splitting ratios；6,9 are
Reflection-type optical fiber Bragg grating, optional high transoid and partially reflective grating, reflectivity R, wherein 0<R<1；10 be light every
From device, optional polarization independent optical isolator.
Pump light enters the second gain fibre 4 by the pumping end of optical-fiber bundling device 2, then reaches the 4th reflection type optical
Fine Bragg grating 9, the fiber bragg grating are high transoid grating, i.e. reflectivity R, R >=99%, the central wavelength is almost
All light can be reflected back, and pass through the second gain fibre 4, optical-fiber bundling device 2, transition optical fiber 5, the first reflection-type optical fiber cloth
Glug optical fiber 6 reaches laser beam splitter 0, which is to be all-trans type grating, i.e. reflectivity R, R >=99%, in this
The almost all of light of cardiac wave strong point can be reflected back.Laser beam splitter 0, the 4th reflection-type optical fiber Bragg grating 9 composition the
One resonant cavity.The laser that first resonant cavity generates enters the first gain fibre 3, then reaches first reflection-type optical fiber Prague
Grating 6, laser beam splitter and the second reflection-type optical fiber Bragg grating 6 form the second resonant cavity.And under the excitation of pumping source 1
First resonant cavity is initially formed laser generation, is then pumped to the second resonant cavity, exports the laser of another wavelength, passes sequentially through
It is transition optical fiber (5), optical-fiber bundling device (2), the second gain fibre (4), the 4th reflection-type optical fiber Bragg grating (9), optically isolated
Device (10) exports.
Embodiment 4
A kind of compound dual-cavity laser structure of all -fiber pulse is as shown in figure 4, basic structure is close with Fig. 3, by pumping source
(1) it is placed between the 4th reflection-type optical fiber Bragg grating (9) and optoisolator (10) with optical-fiber bundling device (2).
Claims (8)
1. a kind of compound dual-cavity laser of all -fiber pulse, which is characterized in that including：Pumping source (1), optical-fiber bundling device (2),
One gain fibre (3), the second gain fibre (4), transition optical fiber (5), the first reflection-type optical fiber Bragg grating (6), second are instead
Emitting fiber bragg grating (7), third reflection-type optical fiber Bragg grating (8), the 4th reflection-type optical fiber Bragg grating
(9), optoisolator (10)；Wherein,
The pumping input terminal of pumping source (1) the connection optical-fiber bundling device (2)；The signal end of optical-fiber bundling device (2) connects transition
One end of optical fiber (5)；The other end of transition optical fiber (5) connects one end of the first reflection-type optical fiber fiber Bragg grating (6)；The
The other end of one reflection-type optical fiber Bragg grating (6) connects one end of the first gain fibre (3)；First gain fibre (3)
The other end connects one end of the second reflection-type optical fiber Bragg grating (7)；Second reflection-type optical fiber Bragg grating (7) it is another
One end of end connection third reflection-type optical fiber Bragg grating (8)；The common end of optical-fiber bundling device (2) connects the second gain fibre
(4) one end；The other end of second gain fibre (4) connects one end of the 4th reflection-type optical fiber Bragg grating (9)；Third is anti-
Emitting fiber bragg grating (8) constitutes the first resonant cavity with the 4th reflection-type optical fiber Bragg grating (9)；First reflection type optical
Fine Bragg grating (6) constitutes the second resonant cavity with the second reflection-type optical fiber Bragg grating (7)；The pump that pumping source (1) generates
Pu light is entered by the pumping input terminal of optical-fiber bundling device (2) in the first resonant cavity, is pumped to the second gain fibre (4)
Pu, the laser of formation enter through optical-fiber bundling device (2), the first reflection-type optical fiber Bragg grating (6) in the second resonant cavity, to the
One gain fibre (3) carries out pumping and generates another wavelength laser, another wavelength laser that the second resonant cavity generates passes through successively
Optical-fiber bundling device (2), the second gain fibre (4), the 4th reflection-type optical fiber Bragg grating (9), optoisolator (10) output.
2. the compound dual-cavity laser of all -fiber pulse according to claim 1, it is characterised in that：First reflection-type
Fiber bragg grating (6), the second reflection-type optical fiber Bragg grating (7), third reflection-type optical fiber Bragg grating (8),
The reflectivity of four reflection-type optical fiber Bragg gratings (9) is R, wherein 0<R<1.
3. a kind of compound dual-cavity laser of all -fiber pulse, which is characterized in that including：Pumping source (1), optical-fiber bundling device (2),
One gain fibre (3), the second gain fibre (4), transition optical fiber (5), the first reflection-type optical fiber Bragg grating (6), laser point
Beam device (0), the 4th reflection-type optical fiber Bragg grating (9), optoisolator (10)；
Wherein, the pumping input terminal of pumping source (1) the connection optical-fiber bundling device (2)；The signal end of optical-fiber bundling device (2) connects
One end of transition optical fiber (5)；The other end of transition optical fiber (5) connects one end of the first gain fibre (3)；First gain fibre
(3) one end of other end connection laser beam splitter；Two output ends of the other end of laser beam splitter are connected directly to form the ring of light；
The common end of optical-fiber bundling device (2) connects one end of the second gain fibre (4)；The other end connection the of second gain fibre (4)
One end of four reflection-type optical fiber Bragg gratings (9)；Laser beam splitter (0) and the 4th reflection-type optical fiber Bragg grating (9) structure
At the first resonant cavity；First reflection-type optical fiber Bragg grating (6) constitutes the second resonant cavity with laser beam splitter (7)；Pumping source
(1) pump light generated is entered by the pumping input terminal of optical-fiber bundling device (2) in the first resonant cavity, to the second gain fibre
(4) it is pumped, the laser of formation enters the second resonance through optical-fiber bundling device (2), the first reflection-type optical fiber Bragg grating (6)
Intracavitary carries out pumping to the first gain fibre (3) and generates another wavelength laser, another wavelength that the second resonant cavity generates swashs
Light is successively through optical-fiber bundling device (2), the second gain fibre (4), the 4th reflection-type optical fiber Bragg grating (9), optoisolator
(10) it exports.
4. the compound dual-cavity laser of all -fiber pulse according to claim 3, it is characterised in that：First reflection-type
Fiber bragg grating (6), the 4th reflection-type optical fiber Bragg grating (9) reflectivity be R, wherein 0<R<1.
5. the compound dual-cavity laser of all -fiber pulse according to claim 1 or 3, it is characterised in that：The pumping source
(1) it is that semiconductor laser, solid state laser, gas laser, optical fiber laser, Ramar laser are one such, output
The centre wavelength of pump light is ranging from：700nm≤λ≤2000nm, the pump mode are the single-ended pumping of fibre core, fibre core pair
The single-ended pumping of end-pumping, covering, covering both-end pumping are one such.
6. the compound dual-cavity laser of all -fiber pulse according to claim 1 or 3, it is characterised in that：The optical fiber closes
Beam device (2) is (2+1) × 1 optical-fiber bundling device or (6+1) × 1 optical-fiber bundling device.
7. the compound dual-cavity laser of all -fiber pulse according to claim 1 or 3, which is characterized in that described first increases
Beneficial optical fiber (3), the second gain fibre (4) are the polarization maintaining optical fibre or photonic crystal polarization maintaining optical fibre mixed with rare earth element, the doping
Rare earth element be ytterbium Yb, erbium Er, holmium Ho, thulium Tm, neodymium Nd, chromium Cr, samarium Sm, bismuth Bi it is one such or several.
8. the compound dual-cavity laser of all -fiber pulse according to claim 1 or 3, it is characterised in that：First gain fibre
(3) core diameter of the second gain fibres of core diameter ＜ (4) of core diameter ＜ transition optical fibers (5).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968306A (en) * | 2017-12-13 | 2018-04-27 | 北京工业大学 | A kind of compound dual-cavity laser of all -fiber pulse |
| CN109412009A (en) * | 2018-11-12 | 2019-03-01 | 北京工业大学 | The all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling |
-
2017
- 2017-12-13 CN CN201721732396.4U patent/CN207910227U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968306A (en) * | 2017-12-13 | 2018-04-27 | 北京工业大学 | A kind of compound dual-cavity laser of all -fiber pulse |
| CN109412009A (en) * | 2018-11-12 | 2019-03-01 | 北京工业大学 | The all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling |
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