CN208820223U - Linear cavity all-fiber laser oscillator with adjustable double-end output power - Google Patents
Linear cavity all-fiber laser oscillator with adjustable double-end output power Download PDFInfo
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Abstract
A linear cavity all-fiber laser oscillator with adjustable double-end output power comprises a laser resonant cavity formed by sequentially connecting a backward fiber grating, a gain fiber and a forward fiber grating through a signal energy transmission fiber; the optical fiber coupling semiconductor laser is also included; a pump signal combiner; a signal energy transmission optical fiber; a pump energy transmission fiber; forward and backward cladding light filters; and the front and back output optical fiber end caps. The central wavelength of the backward fiber grating and/or the forward output fiber grating is adjustable on line; the pumping light output by the optical fiber coupling semiconductor laser is injected into a pumping signal beam combiner through a pumping energy transmission optical fiber and then is injected into a laser resonant cavity through a signal energy transmission optical fiber; laser generated by the laser resonant cavity can be output from the front end and the rear end, and then expanded and output from the optical fiber end cap through the front cladding light filter and the rear cladding light filter respectively. The effective reflectivity of the front and back grating in the resonant cavity is changed by adjusting the central wavelength of the adjustable fiber grating, so that the output power of the front and back ends of the oscillator can be adjusted on line.
Description
Technical field
The utility model relates generally to optical fiber laser field more particularly to a kind of both-end output power is adjustable linear
Chamber full optical fiber laser oscillator.
Background technique
Optical fiber laser generally comprises laser oscillator based on single resonance chamber and based on master oscillation power amplification structure
Two class of laser amplifier.Compared with master oscillation power amplification structured optical fiber laser, full optical fiber laser oscillator has at low cost
Honest and clean, compact-sized, the advantages that control logic is simple, performance is stable, antireflection light echo ability is strong, has extensively in industrial processes
Application.With the extension of application field, all trades and professions require the cost control of laser higher and higher.Currently, in industry
The high-capacity optical fiber laser used is generally used to guarantee effective starting of oscillation of laser by high reflection grating and low anti-
The resonant cavity for penetrating optical grating constitution realizes laser output.The laser at high reflection grating end all feeds back to vibration by high reflection fiber grating
It swings in device, which cannot have laser output.In many applications not high to laser output power, if needing two simultaneously
Road light source, then then need two it is independent including optical module, driving power, refrigerating module and control module laser.
If can be in the power output of a set of optical module, driving power, refrigerating module and control module two lasers of realization
Function, then can greatly simplify laser volume weight, reduce system cost.
Currently, also there is part to disclose the similar both-end of report or the laser of two-port output.One kind be or chemistry
In solid state laser, exported using the glasses lens plated laser for realizing different port.Patent CN1437288A and a kind of document [pump
Pu bidirectional output solid state ring laser, optical technology, volume 2005,31, the 1st phase, the 44-47 pages] use annular chamber knot
Structure, laser transmitted in both directions in annular chamber, using the eyeglass of plating semi-transparent semi-reflecting film, by the Solid State Laser of forward and reverse transmission from difference
Angle is incident in the eyeglass, from the both direction output of an eyeglass.Patent CN2398750Y is semi-transparent semi-reflecting also with plating
The eyeglass of film exports carbon dioxide laser from two end face reflections of resonant cavity.One kind is injected in the way of Lens Coupling
The space structure optical fiber laser of pumping laser is exported using the glasses lens plated laser for realizing different port.Mainly include
CN201210454175、CN201210454271、CN201220597110、 CN201220597341、CN201310467967、
CN201310467970, CN201310467968, CN201310467991, CN201310467992, CN201310468010 etc.
Patent, in such laser, the reflection of plating part and fractional transmission mould mainly on focus lamp so that left and right ends can have it is sharp
Light output.In the two classes laser, two port laser outputs can be realized to a certain degree, but all using spatial lens to sharp
Light is reflected and is coupled, and needs finely to reconcile each eyeglass before use, and stability is poor, and it is high to be not suitable for robustness requirement
Industrial lasers application field.
Patent CN201710869709 discloses a kind of optical fiber laser of bidirectional output.In the patent, the gain of use
Optical fiber is twin-core fiber, and on geometry, energy-transmission optic fibre fibre core and gain fibre fibre core are non-coaxial in fibre cladding parallel to be set
It sets, passes energy fibre core and be used for transmission pump light, active doped core is used for transmission laser；Pump light is infused from the fibre core of energy-transmission optic fibre
Enter, fiber grating is connect with gain fibre fibre core, and signal light is exported from gain fibre fibre core.In the structure, due to pumping optical fiber
It needs to separate with gain fibre, in disengaged position, the coat of optical fiber inevitably destroys to a certain degree, so that laser is difficult
To bear high-power output.In addition, cannot use due to pumping and signal laser not coaxial core in the structure and be based on double clad light
Fine high-power fiber bundling device, limits pumping laser injecting power.
In above-mentioned existing oscillator, most of oscillator all only has single port power output function；Part has dual-port
In the oscillator of output function, but the size of two port output powers of laser can not be changed；In practical application, Ke Nengcun
It has certain requirements occasion in laser power, when especially needing to be higher than a certain single port output power in front and back, existing scheme is then
It is difficult to realize.
Summary of the invention
For the deficiency of above-mentioned prior art, it is complete that the utility model provides a kind of adjustable linear cavity of both-end output power
Fibre laser oscillator partially reflects the fiber grating with fractional transmission rate as the wavelength selection of resonant cavity and function using having
Rate output device realizes that the online output power of resonant cavity front and back end ports is adjusted using the adjustable fiber grating of central wavelength, benefit
Pump light is injected with the pump signal bundling device for capableing of two-way transmission signals laser and transmits signal laser, realizes the double of oscillator
Hold laser output.Using the program, can be what a set of optical module, driving power, refrigerating module and control module were constituted
In system realize two laser oscillators power output function, and can to former and later two port output power on-line controls,
Greatly simplify laser oscillator volume weight, reduce system cost.
The technical solution of the utility model is a kind of adjustable linear cavity full optical fiber laser oscillator of both-end output power,
It include gain fibre, backward fiber grating, forward direction fiber grating, fiber coupled laser diode, pump signal bundling device,
Signal energy-transmission optic fibre, pumping energy-transmission optic fibre, forward direction cladding light stripper, forward direction output optical fibre end cap, backward cladding light stripper,
Backward output optical fibre end cap；The backward fiber grating, gain fibre, forward direction fiber grating are successively connected by signal energy-transmission optic fibre
It connects, forms optical fiber laser resonant cavity；The signal energy-transmission optic fibre will be preceding defeated to fiber grating, forward direction cladding light stripper and forward direction
End caps are sequentially connected out；The signal energy-transmission optic fibre is by after to fiber grating, pump signal bundling device, the filter of backward cladding light
Except device and backward output optical fibre end cap are sequentially connected；The pump signal bundling device includes a signal input arm, a signal
Output arm, one or more pumping input arm, signal input arm are connected with backward cladding light stripper by signal energy-transmission optic fibre
It connects, signal output arm is connect with backward fiber grating by signal energy-transmission optic fibre, and one or more pumping input arm passes through pumping
Energy-transmission optic fibre is connected to the output end of fiber coupled laser diode；The backward fiber grating or/and forward direction fiber grating
For center Wavelength tunable optical fiber grating；Oscillator operation process are as follows: multichannel pump light is from the fiber coupled laser diode
Output end output through pumping energy-transmission optic fibre injection pump signal bundling device carry out conjunction beam, be then injected into through signal energy-transmission optic fibre
In the optical fiber laser resonant cavity, gain fibre generates laser under the feedback of the excitation resonant cavity of pump light.Laser difference
It is exported from forward direction fiber grating and backward fiber grating；Forward direction laser is after the preceding stripper to cladding light from forward direction end caps
Output, backward laser after through to expanding output from backward end caps after cladding light stripper because backward fiber grating or/and
Forward direction fiber grating is center Wavelength tunable optical fiber grating, in use process before tuning into fiber grating and backward fiber grating
One central wavelength, or the central wavelength of the two is tuned simultaneously, change having for fiber grating by changing central wavelength
Reflectivity is imitated, so that resonant cavity feedback end reflectivity is adjustable, the final output power for realizing laser oscillator both ends exists
Line is adjustable.
Hereafter by the spectrum of tunable fiber grating be Gauss spectrum for, description by tuning before to fiber grating and/
Or the central wavelength of backward fiber grating realizes the basic principle that resonant cavity feedback end reflectivity and output power are adjusted:
It is assumed that preceding to tunable fiber grating reflectivity are as follows:
Wherein,For center wavelength, Δ λFFor the 3dB line width of grating, central wavelength?WithBetween can
Tuning, forward direction fiber grating maximum tuning range are as follows:
Backward tunable fiber grating reflectivity are as follows:
Equally,For center wavelength, Δ λBFor the 3dB line width of grating, central wavelength?WithBetween can
Tuning, forward direction fiber grating maximum tuning range are as follows:
According to (1) formula and (3) formula, when the central wavelength of fiber gratingWithWhen fixed, two gratings existWith
The reflectivity at place is up to 1, shortwave and long wave both sides in distance center wavelength, the reflectivity of grating with wavelength change according to
(1) numerical value that formula and (3) formula determine reduces.
In traditional laser oscillator, high reflection fiber grating (the backward fiber grating in general corresponding the utility model)
Reflectivity be greater than 99.9%, the reflectivity of low light reflectivity fibre grating (the forward direction fiber grating in general corresponding the utility model)
Representative value is 10% or so.
Realize that the basic principle of above-mentioned traditional laser oscillator and method are as follows using the utility model: holding backward may be used
Tune the central wavelength of gratingIt is constant, at this time backward fiber grating forReflectivity be 100% (basic with 99.9%
Unanimously)；Center wavelength tuning numerical value is calculated according to (3) formula, to the central wavelength of tunable fiber grating before tuningSo that
After tuning, forward direction adjustable grating is in central wavelengthThe reflectivity at place is 10%.In this way, being achieved that a retroreflection
Rate 99.9%, the conventional laser oscillator of forward direction grating reflectivity 10%.
Similarly, it in order to obtain almost the same output power at output end end caps before and after resonant cavity, can set
Determine laser center wavelengthCentral wavelength of the front and back to fiber grating is tuned simultaneously, so that being determined by (1) and (3) formula
In wavelengthReflectivity from place front and back to fiber grating quite (such as all be 20%), can be with then according to Principles of Laser
Realize the almost the same oscillator of rear and front end mouthful output power.
It similarly, can if necessary to obtain given power proportions output at output end end caps before and after resonant cavity
Made with emulating reflectivity of the given front and back to grating according to laser power by tuning front and back to the central wavelength of fiber grating
By (1) and (3) formula determine in wavelengthThe reflectivity phase that place front and back is set to the reflectivity of fiber grating with demand
Deng.
Further, the full optical fiber laser oscillator of the utility model further includes the second pump signal bundling device and second group
Fiber coupled laser diode.The second pump signal bundling device setting is filtered out in forward direction fiber grating and forward direction cladding light
Between device；The second pump signal bundling device includes a signal input arm, a signal output arm, one or more pumping
Input arm；The signal output arm of the second pump signal bundling device is connect with forward direction fiber grating by signal energy-transmission optic fibre,
Its signal input arm is connect with forward direction cladding light stripper by signal energy-transmission optic fibre, pumping input arm and the second fiber coupling
The output end of semiconductor laser passes through pumping energy-transmission optic fibre connection.
The utility model all -fiber including the second pump signal bundling device and second group of fiber coupled laser diode
Laser oscillator is that the full optical fiber laser oscillator of both-end pumping mode can be further improved using both-end pumping mode
Pump power；Meanwhile signal laser can transmit to positive and negative both direction low-loss in pump signal bundling device, pump luminous energy
Transmit to enough low-losses unidirectional in pump signal bundling device.
Further, laser part is reflected back resonant cavity by the reflectivity of above-mentioned forward direction fiber grating and backward fiber grating
It is interior, partially from resonant cavity transmit export, be the reflection device and output coupling device of laser resonator.
Further, above-mentioned gain fibre is the single multi-clad of pump light and signal light in wherein coaxial transmission,
Generation and transmission for laser.It is highly preferred that gain fibre is rare-earth-ion-doped optical fiber；Its cross-sectional structure is selected from double-contracting
One of layer or the cross section of optic fibre structure of triple clad structure；Doping with rare-earth ions in fibre core, for generating laser, in covering
It is not rare-earth ion-doped, it is used for transmission pump light；When the cross-sectional structure of the gain fibre is double-clad structure, inner cladding is straight
Diameter or circumscribed circle diameter are between 100-1000 microns, and the diameter of surrounding layer is between 250-2000 microns.
Further, above-mentioned fiber coupled laser diode is the driving source that gain fibre generates upper energy level particle, it
Including the semiconductor laser with the matched each wave band of gain fibre absorption peak, the semiconductor laser of each wave band is selected
The combination for being one or more of 808 nanometers, 915 nanometers, 940 nanometers, 976 nanometers, 1550 nanometers from wave band.
Further, above-mentioned signal energy-transmission optic fibre is the non-rare-earth-doped fiber transmitted for laser, cross section knot
Structure is double clad or triple clad structure, and core diameter is in 10-1000 micron range, and inner cladding diameter is in 100-2000 microns of models
In enclosing, outer cladding diameter is between 250-3000 microns.
Further, above-mentioned pumping energy-transmission optic fibre is the non-rare-earth-doped fiber transmitted for pumping laser, transversal
Face structure is single cladding structure, and core diameter is at 10-1000 microns, and cladding diameter is between 100-2000 microns.
Further, above-mentioned forward direction cladding light stripper and backward cladding light stripper are residual in signal optical fibre for filtering out
Pump light and higher order mode are stayed, the geometric dimension of the two is identical as the geometric dimension of signal energy-transmission optic fibre；Above-mentioned forward direction optical fiber end
Cap, backward end caps are used to the signal light in signal energy-transmission optic fibre expanding output, reduce the power density of output end face, mention
The reliability of high laser.
Following technical effect can achieve using the utility model:
1, laser output is realized in two ports of full optical fiber laser oscillator: preceding to fiber grating and backward by utilizing
The pump signal bundling device of fiber grating and the two-way signaling transmission of the two partial reflectances of fiber grating, while realizing laser
It is exported from two ports of oscillator；
2, a full optical fiber laser oscillator of the utility model plays the role of traditional two laser oscillators, reduces and swashs
Light body product, weight and cost: due to the utility model full optical fiber laser oscillator both-end way of output, i.e., in a set of optical mode
Two conventional lasers are realized in the full optical fiber laser oscilator system that block, driving power, refrigerating module and control module are constituted
The function of the power output of oscillator, therefore can use a laser output two-way light beam while meeting different work need
It asks, due to greatly simplifying laser oscillator volume weight, reducing system cost；
3, end caps have been used in utility model device, output end face power density can be reduced, guaranteed that output is protected
Demonstrate,prove stability；
4, using tunable fiber grating, in use process by before tuning to fiber grating and/or backward fiber grating
Central wavelength, can be changed fiber grating effective reflectivity so that at the front and back output end end caps of laser oscillator
Output power is adjustable online, meets the needs of different purposes, for example swashs before adjusting to port (based on preceding to output end cap) output
The power of light:, can be preceding to fine grating by being improved to center wavelength tuning when application environment needs forward power lower
Laser reflectivity, to output laser power before reducing；It, can be by center when application environment needs forward power high power
Wavelength tuning improves the preceding laser reflectivity to fine grating, to output laser power before improving；Extreme case, if adjust before to
For (or backward) fiber grating reflectivity close to 0%, adjusting backward (or forward direction) fiber grating reflectivity is 100% so that it is preceding to
(or backward) end caps corresponding ports output laser power can reach maximum；
5, the gain fibre of the utility model uses the single double clad of pump light and signal light coaxial transmission or wraps more
Layer optical fiber, it is final to realize that pump light substantially transmits in an optical fiber with signal light, it is not required to optical fiber to be separated, makes transmission more
It is reliable and stable.
Detailed description of the invention
From the detailed description with reference to the accompanying drawing to the utility model embodiment, the utility model these and/or its
Its aspect and advantage will become clearer and be easier to understand, in which:
Fig. 1 is a kind of structure of the adjustable linear cavity all -fiber oscillator of both-end output power of the utility model embodiment
Schematic diagram；
Fig. 2 is a kind of center of the adjustable linear cavity all -fiber oscillator of both-end output power of the utility model embodiment
The structural schematic diagram of wavelength tuning laser reflectivity relationship corresponding with central wavelength.
Fig. 3 is a kind of both-end pumping of the utility model embodiment, the adjustable linear cavity all -fiber vibration of both-end output power
Swing the structural schematic diagram of device；
Fig. 4 is a kind of adjustable based on the preceding both-end output power to optical fiber grating with tunable of the utility model embodiment
The structural schematic diagram of linear cavity all -fiber oscillator.
Fig. 5 is a kind of adjustable based on the rear both-end output power to optical fiber grating with tunable of the utility model embodiment
The structural schematic diagram of linear cavity all -fiber oscillator.
Fig. 6 is a kind of both-end output based on both-end pumping, forward direction optical fiber grating with tunable of the utility model embodiment
The structural schematic diagram of the linear cavity all -fiber oscillator of power adjustable.
Fig. 7 is a kind of both-end output power based on both-end pumping, backward adjustable grating of the utility model embodiment
The structural schematic diagram of adjustable linear cavity fiber oscillator device.
Specific embodiment
It is right with reference to the accompanying drawings and detailed description in order to make those skilled in the art more fully understand the utility model
The utility model is described in further detail.
Embodiment 1
A kind of adjustable linear cavity full optical fiber laser oscillator of both-end output power, structural schematic diagram is as shown in Figure 1, it is wrapped
Include gain fibre 1, backward fiber grating 2, forward direction fiber grating 3, fiber coupled laser diode 4, pump signal bundling device
5, signal energy-transmission optic fibre 6, pumping energy-transmission optic fibre 7, forward direction cladding light stripper 8, forward direction output optical fibre end cap 9, backward cladding light
Stripper 10, backward output optical fibre end cap 11；Backward fiber grating 2, gain fibre 1, forward direction fiber grating 3 pass energy by signal
Optical fiber 6 is sequentially connected, and forms optical fiber laser resonant cavity；Backward fiber grating 2, gain fibre 1, forward direction fiber grating 3 pass through letter
Number energy-transmission optic fibre 6 is sequentially connected, and forms optical fiber laser resonant cavity；Signal energy-transmission optic fibre 6 is by preceding to fiber grating 3, forward direction covering
Light stripper 8 and forward direction output optical fibre end cap 9 are sequentially connected；Signal energy-transmission optic fibre 6 is closed by after to fiber grating 2, pump signal
Beam device 5, backward cladding light stripper 10 and backward output optical fibre end cap 11 are sequentially connected；The pump signal bundling device 5 includes
One signal input arm, a signal output arm, one or more pumping input arm, signal input arm and backward cladding light are filtered
Except device 10 is connected by signal energy-transmission optic fibre 6, signal output arm is connect with backward fiber grating 2 by signal energy-transmission optic fibre 6,
The output end that one or more pumping input arm is connected to fiber coupled laser diode by pumping energy-transmission optic fibre 7, so that
The pump light that fiber coupled laser diode 4 issues is coupled to the signal output arm of pump signal bundling device 5 by pumping arm
Optical fiber inner cladding in, it is final to realize that pump light transmits in pump signal bundling device 5；Backward fiber grating (2) or/and forward direction
Fiber grating (3) is center Wavelength tunable optical fiber grating.The substantially course of work of the utility model oscillator: fiber coupling is partly led
The pump light of the output end output of body laser 4 injects pump signal bundling device 5 through pumping energy-transmission optic fibre 7 and carries out conjunction beam, then
Be injected into optical fiber laser resonant cavity through signal energy-transmission optic fibre 6, gain fibre under the feedback of the excitation resonant cavity of pump light,
Laser is generated, laser is exported from forward direction fiber grating 3 and backward fiber grating 2 respectively；The forward direction laser of output is by preceding to packet
Exported after layer light stripper 8 from forward direction end caps 9, backward laser after to after cladding light stripper 10 from backward end caps
11 expand output.
Wavelength tunable optical fiber grating centered on backward fiber grating 2 or/and forward direction fiber grating 3, in the two is
The long adjustable optic fibre grating of cardiac wave, it is assumed that the central wavelength quilt of constant, the backward fiber grating 2 of the central wavelength of forward direction fiber grating 3
When tuning, the effective reflectivity of backward 2 central wavelength of fiber grating is changed, and change procedure relationship such as Fig. 2 (a) of the two is extremely
Shown in Fig. 2 (f).Fig. 2 (a) describe after to tunable fiber grating 2 five typical cases of reflectance spectrum during tuning
Spectrum form corresponds respectively to figure (b), (c), (d), (e), the spectrum form in (f)；Fig. 2 (b) describes preceding to optical fiber
The central wavelength of grating 3 is fixed on 1070nm, and the reflectivity at 1070nm is 100%.In Fig. 2 (c), backward fiber grating
After 2 tune 2nm to shortwave direction, the reflectivity at 1070nm is 25%；In Fig. 2 (d), backward fiber grating 2 is to shortwave
After direction tunes 1nm, the reflectivity at 1070nm is about 70%；In Fig. 2 (e), backward fiber grating 2 is to long wave direction tune
After humorous 1nm, the reflectivity at 1070nm is 70%；In Fig. 2 (f), after backward fiber grating 2 tunes 2nm to long wave direction,
Its reflectivity at 1070nm is 25%.So, in actual laser, it is fixed after to after 2 central wavelength of fiber grating,
To 3 central wavelength of fiber grating before tuning, thus it is possible to vary the effective reflectivity in laser output wavelength from front and back to grating, thus
Change the laser power size of forward and backward output port (i.e. the corresponding output port of forward and backward end caps).To
Change the output laser power at resonant cavity both ends, the final output power for realizing laser oscillator both ends is adjustable online.
The preferred structure of building block of the linear cavity full optical fiber laser oscillator of the utility model both-end output, function are such as
Under.
Gain fibre 1 is rare-earth-ion-doped gain fibre, the optical fiber for generating and transmitting for laser；Gain fibre 1
Cross-sectional structure is selected from one of double clad or the cross section of optic fibre structure of triple clad structure；Doping with rare-earth ions in fibre core,
It is not rare-earth ion-doped in covering for generating laser, it is used for transmission pump light；When the cross-sectional structure of gain fibre 1 is double-contracting
When layer structure, for the diameter or circumscribed circle diameter of inner cladding between 100-1000 microns, the diameter of surrounding layer is micro- in 250-2000
Between rice.
Fiber coupled laser diode 4 is the driving source that gain fibre 1 generates upper energy level particle, it includes and gain light
The semiconductor laser of the matched each wave band of fine 1 absorption peak, the semiconductor laser of each wave band are selected from wave band and receive for 808
Rice, 915 nanometers, 940 nanometers, 976 nanometers, one or more of 1550 nanometers of combination.
Signal energy-transmission optic fibre 6 is the non-rare-earth-doped fiber transmitted for laser, cross-sectional structure be double clad or
Triple clad structure, core diameter is in 10-1000 micron range, and inner cladding diameter is in 100-2000 micron range, surrounding layer
Diameter is between 250-3000 microns；Pumping energy-transmission optic fibre 7 is that transmit for pumping laser non-mixes rare earth sub-optical fibre, transversal
Face structure is single cladding structure, and core diameter is at 10-1000 microns, and cladding diameter is between 100-2000 microns.
In pump signal bundling device 5, signal laser can be transmitted in positive and negative both direction low-loss, and pump light can be
Transmit to positive low-loss.
Forward direction cladding light stripper 8 and backward cladding light stripper 10 be used to filter out residual pump light in signal optical fibre and
The geometric dimension of higher order mode, the two is identical as the geometric dimension of signal energy-transmission optic fibre 6, for example, be all core diameter being 30 micro-
Rice, the doubly clad optical fiber that inner cladding diameter is 900 microns；Forward direction end caps 9, backward end caps 11 are for passing signal
Signal light in energy optical fiber 6 expands output, reduces the power density of output end face, improves the reliability of laser.
Embodiment 2
A kind of both-end pumping, the adjustable linear cavity all -fiber oscillator of both-end output power, structural schematic diagram such as Fig. 3 institute
Show, on the basis of embodiment 1, increases the second pump signal bundling device 12 and corresponding second optical-fiber coupling semiconductor laser
Device 13 constitutes both-end pumping fibre laser oscillator, improves the pump power of injection resonant cavity.Second pump signal bundling device 12
It is arranged between forward direction fiber grating 3 and forward direction cladding light stripper 8；Second pump signal bundling device 12 includes that a signal is defeated
Enter arm, a signal output arm, one or more pumping input arm；The signal output arm of second pump signal bundling device 12 is with before
It is connected to fiber grating 3 by signal energy-transmission optic fibre 6, signal input arm and forward direction layer light stripper 8 can light by signal biography
Fibre 6 connects, and pumps another output end or the second fiber coupling of input arm and the second fiber coupled laser diode 13
The output end of semiconductor laser is connected by pumping energy-transmission optic fibre 7.
The present embodiment structure realizes both-end pumping, can be further improved pump power；Meanwhile signal laser can be
Transmitted to positive and negative both direction low-loss in pump signal bundling device, pump light can in pump signal bundling device unidirectional low damage
The transmission of consumption ground.
Embodiment 3
It is a kind of based on the preceding adjustable linear cavity all -fiber oscillator of the both-end output power to optical fiber grating with tunable, selection
Forward direction fiber grating 3 in embodiment 1 is center tunable wave length fiber grating, and backward fiber grating 2 is that center wavelength is fixed
Fiber grating, structure can pass through the reflection before center wavelength tuning changes to fiber grating 3 as shown in figure 4, in use process
Rate；In the laser oscillator course of work, the central wavelength of forward direction fiber grating 3 can be tuned；The reflection of backward fiber grating 2
Rate is fixed, but can according to need and be fixed as between 5-95%.
Embodiment 4
It is a kind of based on the rear adjustable linear cavity all -fiber oscillator of the both-end output power to optical fiber grating with tunable, selection
Backward fiber grating 2 in embodiment 1 is center tunable wave length fiber grating, and forward direction fiber grating 3 is that center wavelength is fixed
Fiber grating, structure is as shown in figure 5, in use process, to the reflection of fiber grating 2 after being changed by center wavelength tuning
Rate；In the laser oscillator course of work, the central wavelength of backward fiber grating 2 can be tuned；The reflection of forward direction fiber grating 3
Rate is fixed, but can according to need and be fixed as between 5-95%.
Embodiment 5
A kind of adjustable linear cavity all -fiber vibration of both-end output power based on both-end pumping, forward direction optical fiber grating with tunable
Device is swung, the forward direction fiber grating 3 in selection example 2 is center tunable wave length fiber grating, centered on backward fiber grating 2
The fixed fiber grating of wavelength, structure can be changed preceding to optical fiber light as shown in fig. 6, in use process by center wavelength tuning
The reflectivity of grid 3；In the laser oscillator course of work, the central wavelength of forward direction fiber grating 3 can be tuned；Backward optical fiber light
The reflectivity of grid 2 is fixed, but can according to need and be fixed as between 5-95%.
Embodiment 6
A kind of adjustable linear cavity fiber oscillator device of both-end output power based on both-end pumping, backward adjustable grating,
Backward fiber grating 2 in selection example 2 is center tunable wave length fiber grating, and forward direction fiber grating 3 is center wavelength
Fixed fiber grating, structure is as shown in fig. 7, in use process, to fiber grating 2 after being changed by center wavelength tuning
Reflectivity；In the laser oscillator course of work, the central wavelength of backward fiber grating 2 can be tuned；Forward direction fiber grating 3
Reflectivity is fixed, but can according to need and be fixed as between 5-95%.
Each embodiment of the utility model is described above, above description is exemplary, and non-exclusive, and
And it is also not necessarily limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for
Many modifications and changes are obvious for those skilled in the art.Therefore, the guarantor of the utility model
Shield range should be subject to the protection scope in claims.
Claims (9)
1. a kind of adjustable linear cavity full optical fiber laser oscillator of both-end output power, which is characterized in that it includes gain fibre
(1), backward fiber grating (2), forward direction fiber grating (3), fiber coupled laser diode (4), pump signal bundling device
(5), signal energy-transmission optic fibre (6), pumping energy-transmission optic fibre (7), forward direction cladding light stripper (8), forward direction output optical fibre end cap (9),
Backward cladding light stripper (10), backward output optical fibre end cap (11)；
The backward fiber grating (2), gain fibre (1), forward direction fiber grating (3) are successively connected by signal energy-transmission optic fibre (6)
It connects, forms optical fiber laser resonant cavity；
The signal energy-transmission optic fibre (6) is by preceding to fiber grating (3), forward direction cladding light stripper (8) and forward direction output optical fibre end
Cap (9) is sequentially connected；
The signal energy-transmission optic fibre (6) is by after to fiber grating (2), pump signal bundling device (5), backward cladding light stripper
(10) it is sequentially connected with backward output optical fibre end cap (11)；
The pump signal bundling device (5) includes a signal input arm, a signal output arm, one or more pumping inputs
Arm；Its signal input arm and backward cladding light stripper (10) connects by signal energy-transmission optic fibre (6), signal output arm with backward
Fiber grating (2) is connected by signal energy-transmission optic fibre (6), and one or more pumping input arm is by pumping energy-transmission optic fibre (7) even
It is connected to one or more output ends of fiber coupled laser diode (4)；
The backward fiber grating (2) or/and forward direction fiber grating (3) are center Wavelength tunable optical fiber grating.
2. the adjustable linear cavity full optical fiber laser oscillator of both-end output power according to claim 1, which is characterized in that
It further include the second pump signal bundling device (12) and the second fiber coupled laser diode (13), second pump signal is closed
Beam device (12) is arranged between forward direction fiber grating (3) and forward direction cladding light stripper (8)；The second pump signal bundling device
It (12) include a signal input arm, a signal output arm, one or more pumping input arm；Second pump signal is closed
The signal output arm of beam device (12) is connect with forward direction fiber grating (3) by signal energy-transmission optic fibre (6), and signal input arm is with before
It is connected to cladding light stripper (8) by signal energy-transmission optic fibre (6), pumping input arm and the second optical-fiber coupling semiconductor laser
The output end of device (13) passes through pumping energy-transmission optic fibre (7) connection.
3. the adjustable linear cavity full optical fiber laser oscillator of both-end output power as claimed in claim 1 or 2, feature exist
In, the forward direction fiber grating (3) and backward fiber grating (2) for signal laser part to be reflected back in resonant cavity, part
It transmits and exports from resonant cavity, be the reflection device and output coupling device of laser resonator.
4. the adjustable linear cavity full optical fiber laser oscillator of both-end output power according to claim 1 or 2, feature exist
In the gain fibre (1) is the single multi-clad of pump light and laser in wherein coaxial transmission, the generation for laser
And transmission.
5. the adjustable linear cavity full optical fiber laser oscillator of both-end output power according to claim 4, which is characterized in that
The gain fibre (1) is rare-earth-ion-doped gain fibre；Its cross-sectional structure is selected from the light of double clad or triple clad structure
One of fine cross-sectional structure, doping with rare-earth ions in fibre core is not rare-earth ion-doped in covering for generating laser, is used for
Transmit pump light；When the cross-sectional structure of the gain fibre (1) is double-clad structure, inner cladding diameter or circumscribed circle diameter
Between 100-1000 microns, the diameter of surrounding layer is between 250-2000 microns.
6. the adjustable linear cavity full optical fiber laser oscillator of both-end output power according to claim 1 or 2, feature exist
In the fiber coupled laser diode (4) includes swashing with the semiconductor of the matched each wave band of gain fibre (1) absorption peak
Light device, it is 808 nanometers, 915 nanometers, 940 nanometers, 976 nanometers, 1550 that the semiconductor laser of each wave band, which is selected from wave band,
The combination of one or more of nanometer is used as the driving source of energy level particle in gain fibre (1) generation.
7. the adjustable linear cavity full optical fiber laser oscillator of both-end output power according to claim 1 or 2, feature exist
In, the signal energy-transmission optic fibre (6) be the non-rare-earth-doped fiber transmitted for laser, cross-sectional structure be double clad or
Triple clad structure, core diameter is in 10-1000 micron range, and inner cladding diameter is in 100-2000 micron range, surrounding layer
Diameter is between 250-3000 microns.
8. the adjustable linear cavity full optical fiber laser oscillator of both-end output power according to claim 1 or 2, feature exist
In pumping energy-transmission optic fibre (7) is the non-rare-earth-doped fiber transmitted for pumping laser, and cross-sectional structure is single packet
Layer structure, core diameter is at 10-1000 microns, and cladding diameter is between 100-2000 microns.
9. the adjustable linear cavity full optical fiber laser oscillator of both-end output power according to claim 1 or 2, feature exist
In, the geometric dimension of the forward direction cladding light stripper (8) and backward cladding light stripper (10) with signal energy-transmission optic fibre (6)
Geometric dimension it is identical.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821644616.2U CN208820223U (en) | 2018-10-11 | 2018-10-11 | Linear cavity all-fiber laser oscillator with adjustable double-end output power |
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|---|---|---|---|
| CN201821644616.2U CN208820223U (en) | 2018-10-11 | 2018-10-11 | Linear cavity all-fiber laser oscillator with adjustable double-end output power |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109038194A (en) * | 2018-10-11 | 2018-12-18 | 中国人民解放军国防科技大学 | Linear cavity all-fiber laser oscillator with adjustable double-end output power |
| CN114080738A (en) * | 2019-07-25 | 2022-02-22 | 株式会社藤仓 | Fiber laser and laser output method |
-
2018
- 2018-10-11 CN CN201821644616.2U patent/CN208820223U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109038194A (en) * | 2018-10-11 | 2018-12-18 | 中国人民解放军国防科技大学 | Linear cavity all-fiber laser oscillator with adjustable double-end output power |
| CN109038194B (en) * | 2018-10-11 | 2024-03-22 | 中国人民解放军国防科技大学 | Linear cavity all-fiber laser oscillator with adjustable double-end output power |
| CN114080738A (en) * | 2019-07-25 | 2022-02-22 | 株式会社藤仓 | Fiber laser and laser output method |
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