CN101424771B - Optical fiber grating tuning device and optical systems - Google Patents

Optical fiber grating tuning device and optical systems Download PDF

Info

Publication number
CN101424771B
CN101424771B CN2008102114707A CN200810211470A CN101424771B CN 101424771 B CN101424771 B CN 101424771B CN 2008102114707 A CN2008102114707 A CN 2008102114707A CN 200810211470 A CN200810211470 A CN 200810211470A CN 101424771 B CN101424771 B CN 101424771B
Authority
CN
China
Prior art keywords
fiber grating
optical fiber
tuner according
wavelength tuner
slide block
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN2008102114707A
Other languages
Chinese (zh)
Other versions
CN101424771A (en
Inventor
骆飞
叶东风
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US12/176,504 external-priority patent/US7801403B2/en
Application filed by Individual filed Critical Individual
Publication of CN101424771A publication Critical patent/CN101424771A/en
Application granted granted Critical
Publication of CN101424771B publication Critical patent/CN101424771B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/02195—Refractive index modulation gratings, e.g. Bragg gratings characterised by means for tuning the grating
    • G02B6/022—Refractive index modulation gratings, e.g. Bragg gratings characterised by means for tuning the grating using mechanical stress, e.g. tuning by compression or elongation, special geometrical shapes such as "dog-bone" or taper
    • 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
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/105—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length
    • H01S3/1053—Control by pressure or deformation
    • 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
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/105—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length
    • H01S3/1055—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length one of the reflectors being constituted by a diffraction grating

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

The invention relates to a tuning device for wavelength of an optical fiber grating, wherein the optical fiber grating is disposed on a restriction trench of a tuning part which can be relatively movable or deformable in part such that the tuning for wavelength of the optical fiber grating is realized by applying compression or tensile strain on the optical fiber grating. The tuning part may include a first and a second slide block, wherein one end of the optical fiber is secured to the first slide block, while the other end of the optical fiber is secured to the second slide block, a grating segment on the optical fiber is placed in a trench between adjacent surfaces of the first and second slide blocks and is restricted within the trench. Proper selection is made to size of the restriction trench so that the optical fiber grating still keeps straight without being bend while being compressed. An actuator can be used for actuating one or two slide blocks in order to apply the controllable strain on the optical fiber, which is to say, to apply the controllable axial compression or tensile strain on the optical fiber grating. Hence, the wavelength of the optical fiber grating can be tuned in accordance with the strain applied thereon.

Description

Optical fiber grating tuning device and optical system
Technical field
The present invention relates to a kind of optical fibre device, particularly tunable fiber grating.
Background technology
Fiber grating has to be selected and is controlled at the characteristic of the light wavelength of propagating in the optical fiber and has many application, for example is widely used in optical fiber telecommunications system, Fibre Optical Sensor and fiber laser.Typical fiber grating is by introducing periodic small variations in refractive index and form along fiber length in fiber cores.Generally speaking, two types fiber grating is arranged: optical fiber Bragg raster (FBG) and long period fiber grating (LPFG), long period fiber grating (LPFG) is that with the difference of optical fiber Bragg raster (FBG) the grating cycle of long period fiber grating (LPFG) is longer than the grating cycle of optical fiber Bragg raster (FBG).
The FBG reflection wavelength is λ BLight, λ is arranged B=2n Λ B, be called as Bragg condition, or the Bragg wavelength, wherein, λ BBe the centre wavelength from optical grating reflection light, n is the effective refractive index of fiber cores, Λ BIt is the cycle of index modulation.FBG has good wavelength selective power, can be used as the narrowband reflection mirror.The centre wavelength of FBG has another name called resonant wavelength, can strainedly change with influence of temperature variation.For example, for a certain specific strain stress z, the centre wavelength drift of FBG is Δ λ B=λ B(1-p) ε z, wherein p is the effective strain optical constant.For given temperature variation Δ T, the drift of the centre wavelength of this FBG is Δ λ B=λ B(α A+ α B) Δ T, wherein α ABe the thermal expansivity of optical fiber, α BRepresent thermo-optical coeffecient.Typical centre wavelength is at the FBG of 1550nm, and the wave length shift that strain causes is about 2pm/ μ ε, and the wave length shift that temperature variation causes is about 12.8pm/ ℃.These physical characteristicss can be used for regulating the centre wavelength of FBG, promptly adopt may command strain or heat to be added on the FBG.
Long period fiber grating (LPFG) has similar structure to optical fiber Bragg raster (FBG), but the grating periods lambda of LPFG LBe longer than the periods lambda of FBG B, common Λ LBe Λ BMore than 200 to 2000 times.Basic mode in the LPFG optical fiber is coupled to cladding mode, and the cladding mode that excites decay, thereby the resonance loss appears on transmission spectrum.Than FBG, LPFG can not produce reflected light.
The basic mode of long period fiber grating and cladding mode are in wavelength X MLThe phase-matching condition of coupling can be expressed as: λ ML=(n Core-n Cl m) Λ L, wherein, n CoreBe the effective refractive index of basic mode, n Cl mBe the effective refractive index of m rank cladding mode, Λ LIt is the cycle of long period fiber grating.Because a plurality of cladding modes can satisfy this condition, and each cladding mode is in different central wavelength lambda ML, so the transmission spectrum of LPFG shows a series of loss peaks along spectral distribution.Be similar to FBG, the also strained and influence of temperature variation of the centre wavelength of LPFG (resonant wavelength).Therefore, also can to adopt controllable strain or heating to carry out tuning for the resonant wavelength of LPFG.
For various application, such as tunable optic filter, Fibre Optical Sensor demodulating system and the tunable optical fiber laser based on fiber grating, can carry out tuning on a large scale to the resonant wavelength of fiber grating is highly significant.Just as already mentioned, fiber grating can be undertaken tuning by strain (for example, stretching or compression), or is undertaken tuning by heating.Yet the problem of thermal tuning is that it may cause the heating degeneration of fiber grating relative with tuning range less.Tuning for strain, known compression optical fiber grid ratio stretching optical fiber grating has bigger tuning range, because the compressive strength rate tensile strength of optical fiber exceeds 20 times.Yet because optical fiber is very tiny, for example, typical fibre diameter is about 125um, therefore, how to act on the axial compression strain to optical fiber and guarantee that optical fiber do not induce bending to truly have many difficulties.
Known technology has: people such as Morey are No.5 in the patent No., 469,520, be entitled as the compression-tuned principle of having described a kind of fiber grating in the United States Patent (USP) of " Compression Tuned Fiber Grating ", it is fiber grating to be placed in the slidable sleeve and to be placed on sleeve pipe on the physical construction with accurate collimation guiding and to limit optical fiber.Yet the technical requirement sleeve pipe of Morey has the aligning of accurate diameter and pin-point accuracy.Another kind method is to be No.6 by people such as Fernald in the patent No., 229,827 and No.6,363,089, be entitled as to have described in the United States Patent (USP) of " Compression-TunedBragg Grating and Laser " fiber grating is welded in the glass capillary.Yet this production process is difficult to operation.Another method is that Long is No.6 in the patent No., 360,042, be entitled as to have described in the United States Patent (USP) of " Tunable optical fiber gratings device " fiber grating be bonded on the semi-girder, beam can be crooked on different directions and make the fiber grating that is bonded on the semi-girder by compression or tensile strain.
Summary of the invention
Therefore, the present invention proposes a kind of optic fiber grating wavelength tuner.In a kind of concrete enforcement, tuning part is made up of the slide block part, wherein fiber grating is placed in the qualification groove between the slide block part, one end of optical fiber is fixed on first slide block, and the other end of optical fiber is fixed on second slide block, slide block part part can relatively move, thereby acts on compression or tensile strain on fiber grating.Limiting groove makes this fiber grating still keep straight line and not have bending doing the time spent by compression.
In that another kind is concrete in implementing is to adopt deformation block, and optical fiber is fixed in the qualification groove between these two deformation blocks, and elongation by deformation block and drawdown deformation realize axial compression or the stretching to fiber grating.Limiting groove makes this fiber grating still keep straight line and not have bending doing the time spent by compression.
This optic fiber grating wavelength tuner can be applied to such as tunable optical fiber laser, tunable optical fiber filter and adjustable chromatic dispersion compensator spare medium.
Description of drawings
Fig. 1 is the side view of optical fiber grating tuning device according to an embodiment of the invention.
Fig. 2 be among Fig. 1 along the partial section of A-A direction, illustrate in the V-type groove that fiber grating partly is placed on slide block and be limited in this groove.
Fig. 3 a, 3b, 3c and 3d show and are used to limit optical fiber and axially directed qualification groove can have difformity.
Fig. 4 a, 4b and 4c show the space formation qualification groove that available cylindricality line is formed.
Fig. 5 shows the difference qualification groove of several fiber gratings being put into same slide block, so that these fiber gratings can be by simultaneous tuning.
Fig. 6 shows the side view of implementing with two actuators.
Fig. 7 is the side view that comes the embodiment of fine tuning fiber grating with the arc springs.
The side view that Fig. 8 is to use ripple corrugation deformation block to implement.
Ripple corrugation deformation block and the side view that reloading spring is implemented that Fig. 9 is to use two symmetries to place.
The side view that Figure 10 is to use the gap pad to implement.
Figure 11 shows the tunable optical fiber laser synoptic diagram that forms on this fiber grating tuning technical foundation.
Embodiment
Referring to Fig. 1 and Fig. 2, in a kind of specific embodiment of optical fiber grating tuning device of the present invention, tuning part is made up of the slide block part.Have fiber grating zone 102 on the optical fiber 101, and be placed in the qualification groove between slide block 111 and 112.Slipper can move relative to a little, limits the feasible diameter that is matched with optical fiber of size of groove.One end 132 of optical fiber is fixed on the slide block 112, and the other end 131 of optical fiber is fixed on the slide block 111, and slide block 111 and 112 is placed on the framework 125.Slide block 112 and framework 125 relative fixed, but and slide block 111 a little moves relative to slide block 112.Under the free condition that does not stress, a little gap 103 is arranged respectively between the stiff end 131 of optical fiber and the stiff end 132 of slide block 112 and optical fiber and the slide block 111, thereby slide block 111 can be moved relative to a little relative to slide block 112, thus compression optical fiber.This gap must be smaller, for example less than 1mm, can be full of macromolecular material in the gap.The spring 123 of prestrain applies force on the slide block 111 and moves with the recovery of assisting slide block 111, and fiber grating is recovered from compressive strain, and assists the stretching action to fiber grating.
Actuator 121 promotes slide block 111 and moves, so that fiber grating is compressed the effect of stress or drawing stress.For example, when actuator 121 when the state that do not stress of fiber grating promotes slide block 111 and is moved to the left, fiber grating 102 is compressed stress, suffered stress is proportional to actuator 121 and is applied to driving force on the slide block 111.And promoting slide blocks 111 when original state moves right when actuator 121, fiber grating then is subjected to the effect of drawing stress.Actuator 121 maybe can be tightly linked with slide block 111 by connecting nail 122.Because fiber grating is limited in the qualification groove on the slide block, so fiber grating can keep linear state and not have bending in loading process.According to the size of power that actuator applies, in fiber grating, produce corresponding strain, thereby the resonant wavelength of fiber grating can be by tuning.
Fig. 3 a, 3b, 3c and 3d illustrative the qualification groove on the slide block various cross sectional shapes can be arranged.Fig. 3 a is a rectangle, and Fig. 3 b is circular, and Fig. 3 c is " V " type, and Fig. 3 d is " U " type.Certainly, limit groove and also can adopt other different shape.The size of these grooves will be complementary with the diameter of optical fiber, and these grooves can be opened on two slide blocks or only open on a slide block.
Fig. 4 a, the qualification groove that 4b and 4c illustrative are used to limit optical fiber also can be formed by the slit that various section bars are combined to form.For example, among Fig. 4 a, limit the gap that groove is made up of 4 columniform filaments 415 and form, optical fiber 101 is placed in the gap.And being shown among Fig. 4 b, the gap of forming with 3 filaments forms the qualification groove.Fig. 4 c adopts 2 filaments 415 to add a plane 416 again to form the qualification groove, and optical fiber 101 is placed on these and limits in grooves.
Fig. 5 illustrates and can have a plurality of qualification grooves on the slide block, and a plurality of fiber grating can be put in these parallel grooves simultaneously to carry out simultaneous tuning.
Fig. 6 then a plurality of actuators 621 of illustrative and 624 is used to promote slide block, and wherein actuator 621 promotes slide block 611, actuator 624 promotes slide block 612 to increase tuning range.
Fig. 7 then shows another kind of active principle, and an arc-like sheet spring 735 is used to transmit moving of actuator 721.One end of arc-like sheet spring 735 is attached on the slide block 711, and the other end is attached on the fixed frame 725 or is attached on the slide block 712.When actuator 721 when the Y direction applied thrust is pressed arc-like sheet spring 735, the arc-like sheet spring will produce the expansion along X-direction, is moved to the left thereby promote slide block 711.Its result makes fiber grating 102 be compressed effects of strain, thereby can carry out wavelength tuning to fiber grating.Compression spring 723 can preload resets when helping the actuator unloading to slide block 711 and applies tensile pull on the fiber grating.
Fig. 8 and Fig. 9 have illustrated another specific implementation method.Used a kind of deformation block in the method, the example of its specific implementation can be described as follows.Fiber grating 2 is sandwiched in the qualification groove between deformation block 11 and 12, and its size and dimension that limits groove is similar to noted earlier.The two ends of optical fiber 1 are fixed on the two ends 31 and 32 of deformation block, has deformable segments on the deformation block 11 and 12, the ripple shown in figure wrinkle part 41 and 42 for example, make that deformation block can axial deformation under the driving of actuator 21, and the axial compression of deformation block and stretcher strain cause corresponding axial compression of fiber grating and tensile strain, so the wavelength of fiber grating can be by tuning.The slit of ripple in deformation block wrinkle part must very little (typically) less than 1mm to guarantee that optical fiber is incomplete by compression the time, also can the filled high polymer material in its slit.Ripple in deformation block wrinkle part can be and integral body of deformation block or the part that separates, can be cross arrangement as shown in Figure 8, perhaps symmetric offset spread is as shown in Figure 9.Also can use one in its structure as the spring among Fig. 9 923, this springs preload resets when helping deformation block to unload by compression on deformation block 11 and 12 and can apply tensile pull on the deformation block.
When actuator 21 promotion deformation blocks were moved to the left, force of compression was loaded on deformation block 11 and 12, and makes fiber grating be compressed strain, and this moment, the wavelength of fiber grating was moved by tuning short wavelength direction.And when actuator 21 to the right the time, the wavelength of fiber grating is moved by tuning long wavelength direction.
Figure 10 shows another specific embodiment.One end of optical fiber is fixed on the slide block 1012 by fixed block 1036, and the other end of optical fiber is fixed on the slide block 1011 by fixed block 1038, and slide block 1011 and 1012 is placed in the framework 1025.Wherein a fritter pad 1043 and 1044 is placed on slide block 1011 and 1012 next doors.The existence in gap 1003 makes slide block 1011 to be moved to the left under the effect of actuator 1021 and fiber grating is applied compressive strain, thereby the wavelength of fiber grating is realized that compressive strain is tuning.In similar structure, can place a plurality of pads if needed.The simplest situation is not place pad, and at leaving gap 1003 between fixed block 1036 and the slide block 1011 and between fixed block 1038 and the slide block 1012.In these gaps, also can insert some material, such as high molecular polymer.In fact, these pads itself also can be to be made by macromolecular material (as certain rubber), or directly fill out macromolecular material in the space.
Need to prove, in these specific embodiments, can be the combination of various types of fiber gratings or various fiber gratings by tuning fiber grating.These fiber gratings can include but not limited to optical fiber Bragg raster, long period fiber grating, phase shift fiber grating, chirped fiber grating, lamination fiber grating, cascade fiber grating etc., and these various fiber gratings may write in the various optical fiber.These optical fiber include but not limited to single-mode fiber, polarization maintaining optical fibre, doubly clad optical fiber, rare-earth doped optical fibre, photonic crystal fiber, multimode optical fiber etc.In addition, maybe can write a plurality of fiber gratings on the same optical fiber, these fiber gratings can serial link and are placed in the same qualification groove or put into several parallel qualification grooves respectively, and it is simultaneously tuning to carry out wavelength, or these fiber gratings are written on the different optical fiber and link together then by tuning.
Figure 11 has provided a kind of concrete application example on tunable optical fiber laser.This fiber laser comprises gain fibre 106, its two ends are connected with fiber grating 102 and 104 respectively, optical fiber Bragg raster is used as the narrowband reflection utensil has identical centre wavelength that bulk of optical feedback is provided, so gain fibre 106 and optical fiber Bragg raster (FBG) 102,104 have been formed a laserresonator.This fiber laser cavity is put into the qualification groove of foregoing optic fiber grating wavelength tuner.When the wavelength of fiber grating 102 and 104 when tuning because the resonance wavelength of fiber laser depends on the centre wavelength of fiber grating, so laser output wavelength just can be by tuning.Here, gain fibre 106 can be doped fibers such as Er, Yb, Nd, Er/Yb or Tm.Fiber grating optical fiber and gain fibre also can be various optical fiber, such as single-mode fiber, polarization maintaining optical fibre, doubly clad optical fiber, photonic crystal fiber or multimode optical fiber.In addition, the FBG of FBG or phase shift can directly form on gain fibre, has so just formed a kind of distributed feed-back type (DFB) fiber laser, and the wavelength of its laser output can carry out tuning according to the optical fiber grating tuning device of narrating previously fully.
It is pointed out that this invention can form various application devices, comprising but be not limited to tunable optic filter, adjustable chromatic dispersion compensator spare, and can in optical fiber sensing system, be used for demodulation to transducing signal etc.
Though only described some specific embodiments here, can also derive different similar devices according to the principle of this invention.And, only used some illustrative structures to describe some selected concrete device for carrying out said here, this system can also implement with various concrete structures based on the principle of this invention, so this invention is hard-core within the scope of the claims.

Claims (16)

1. optic fiber grating wavelength tuner comprises:
Two slide blocks of Fang Zhiing up and down, at least one that is formed between two slide blocks limits groove, be placed with at least one fiber grating in this at least one qualification groove, the two ends of this at least one fiber grating are separately fixed on these two slide blocks, the relatively moving of this two slide blocks makes and can apply axial force of compression or tensile force to this at least one fiber grating that this qualification groove limits this at least one fiber grating makes it still keep straight line and not have bending in the time spent of doing that is compressed power.
2. optic fiber grating wavelength tuner according to claim 1, wherein the shape of cross section of this qualification groove can be V-arrangement, U-shaped, circle or various polygon.
3. optic fiber grating wavelength tuner according to claim 1, also comprise at least one actuator, it drives at least one slide block, and this actuator comprises micro positioner, piezo-activator, by the actuator of stepper motor or driven by servomotor, and in the hot driver at least one.
4. optic fiber grating wavelength tuner according to claim 3 further comprises the arc spring that is connected at least one slide block, and this arc spring is subjected to the actuator effect and moves at least one slide block.
5. optic fiber grating wavelength tuner according to claim 1 further comprises the spring of at least one prestrain, and it applies force at least one slide block, recovers from compressive strain to assist fiber grating, and assists tensile strain to fiber grating.
6. optic fiber grating wavelength tuner according to claim 1 wherein has at least one to limit the fiber grating of placing a plurality of serials in the groove.
7. optic fiber grating wavelength tuner according to claim 6, wherein one section gain fibre is connected between the fiber grating string to form a fiber laser cavity.
8. optic fiber grating wavelength tuner according to claim 1, wherein fiber grating comprises phase-shifted fiber grating, it is formed directly in the gain fibre to form a kind of distributed feed-back type fiber laser cavity.
9. optic fiber grating wavelength tuner comprises:
At least one deformation block, at least one deformed region is arranged on it, on this deformation block, there is at least one to limit groove, wherein place at least one fiber grating in this at least one qualification groove, the two ends of this at least one fiber grating are separately fixed at the two ends of this deformation block, make axial deformation by this deformation block can apply axial force of compression or tensile force to this at least one fiber grating, this qualification groove limits this at least one fiber grating makes it still keep straight line and not have bending in the time spent of doing that is compressed power.
10. optic fiber grating wavelength tuner according to claim 9, wherein this deformed region has a joint ripple wrinkle part at least.
11. optic fiber grating wavelength tuner according to claim 9, wherein the shape of cross section of this qualification groove can be V-arrangement, U-shaped, circle or various polygon.
12. optic fiber grating wavelength tuner according to claim 9, also comprise at least one actuator, it drives this at least one deformation block, and this actuator comprises micro positioner, piezo-activator, by the actuator of stepper motor or driven by servomotor, and in the hot driver at least one.
13. optic fiber grating wavelength tuner according to claim 9, the spring that further comprises at least one prestrain, it applies force at least a portion on the deformation block, recover from compressive strain to assist fiber grating, and assistance is to the tensile strain of fiber grating.
14. optic fiber grating wavelength tuner according to claim 9 wherein has at least one to limit the fiber grating of placing a plurality of serials in the groove.
15. optic fiber grating wavelength tuner according to claim 14, wherein one section gain fibre is connected between the fiber grating string to form a fiber laser cavity.
16. optic fiber grating wavelength tuner according to claim 9, wherein fiber grating comprises phase-shifted fiber grating, and it is formed directly in the gain fibre to form a kind of distributed feed-back type fiber laser cavity.
CN2008102114707A 2007-10-30 2008-09-26 Optical fiber grating tuning device and optical systems Active CN101424771B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US99207P 2007-10-30 2007-10-30
US61/000,992 2007-10-30
US12/176,504 US7801403B2 (en) 2007-10-30 2008-07-21 Optical fiber grating tuning device and optical systems employing same
US12/176,504 2008-07-21

Publications (2)

Publication Number Publication Date
CN101424771A CN101424771A (en) 2009-05-06
CN101424771B true CN101424771B (en) 2010-09-22

Family

ID=42740340

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2008102114707A Active CN101424771B (en) 2007-10-30 2008-09-26 Optical fiber grating tuning device and optical systems

Country Status (1)

Country Link
CN (1) CN101424771B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104423031A (en) * 2013-08-29 2015-03-18 清华大学 Grating deformation driving mechanism and manufacturing method thereof
CN105137591B (en) * 2014-04-03 2019-06-04 骆飞 Fiber grating superstructure tuning methods and device
TWI554797B (en) * 2015-04-30 2016-10-21 晉禾企業股份有限公司 Thermal compensated and tensed spring compact fiber bragg grating filter
CN104852270B (en) * 2015-05-07 2018-12-07 燕山大学 Dual wavelength narrow cable and wide optical fiber laser based on overlapping grating and chirp grating
CN110233415B (en) * 2019-05-29 2020-05-01 山东省科学院激光研究所 Distributed feedback fiber laser with multiple tunable wavelengths
CN113156672A (en) * 2021-05-08 2021-07-23 南开大学 Packaging structure and packaging method of all-fiber coupler

Also Published As

Publication number Publication date
CN101424771A (en) 2009-05-06

Similar Documents

Publication Publication Date Title
EP1135701B1 (en) Compression-tuned bragg grating and laser
CN101424771B (en) Optical fiber grating tuning device and optical systems
US6826343B2 (en) Multi-core waveguide
US7801403B2 (en) Optical fiber grating tuning device and optical systems employing same
US6982996B1 (en) Large diameter optical waveguide, grating, and laser
EP0783718B1 (en) Compression-tuned fiber grating
CA2353504C (en) Compression-tuned bragg grating and laser
US6813013B2 (en) Pressure-isolated bragg grating temperature sensor
US6430342B1 (en) Fiber grating and fiber optic devices using the same
US9864131B2 (en) Tunable superstructure fiber grating device
WO2002043198A2 (en) Tunable raman laser and amplifier
CN105137591B (en) Fiber grating superstructure tuning methods and device
US20030215185A1 (en) Large diameter optical waveguide having long period grating therein
US6792009B2 (en) Tunable grating-based channel filter parking device
US7085439B2 (en) Tunable filter consisting of an optical fiber, and a corresponding method
JPH11507741A (en) Mach-Zehnder switch
WO2002037625A2 (en) Compression-tuned bragg grating-based laser
US6898002B2 (en) Optical device, optical module, optical amplifier, and optical transmission system
JP4522588B2 (en) Compression-tuned Bragg grating and laser
Takahashi et al. Reconfigurable optical add/drop multiplexer using passive temperature-compensated wavelength tunable fiber Bragg grating
KR100365262B1 (en) Device for adjusting and stabilizing wave lengths of fiber gratings
WO2003079065A2 (en) Tuneable optical waveguide grating transmission filter

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant