CN105676347A - Multi-wavelength tunable filer based on polarization maintaining chirped fiber grating - Google Patents
Multi-wavelength tunable filer based on polarization maintaining chirped fiber grating Download PDFInfo
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- CN105676347A CN105676347A CN201610260219.4A CN201610260219A CN105676347A CN 105676347 A CN105676347 A CN 105676347A CN 201610260219 A CN201610260219 A CN 201610260219A CN 105676347 A CN105676347 A CN 105676347A
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- 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
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- 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
- G02B6/024—Optical fibres with cladding with or without a coating with polarisation maintaining properties
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- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29316—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide
- G02B6/29317—Light guides of the optical fibre type
Abstract
The invention discloses a multi-wavelength filer based on a polarization maintaining fiber grating and belongs to the fields of optical fiber communication and instrument and apparatus. A chirped fiber grating (15) is written into a polarization maintaining optical fiber (11), and phase shift (16) is led onto the chirped fiber grating. When the polarization maintaining optical fiber is under the action of a stress axis X (12) and a stress axis Y (13), refractive indexes of a fiber core (14) in an X axis and a Y axis are different, so that double refraction is formed, the frequency spectrum of the polarization maintaining chirped fiber grating (15) has two polarization transmission peaks (21) and (22) which are symmetrical with each other, and the bandwidth of each polarization transmission peak is consistent with that of the chirped fiber grating on a common optical fiber. After the phase shift (16) is led onto the chirped fiber grating (15), extremely narrow slits corresponding to the phase shift (16) can be formed in the two polarization transmission peaks (21) and (22) of the chirped fiber grating (15), the positions of the slits turning up within a bandwidth range can be changed by changing the position of the led-in phase shift, the transmission depths of the slits can be changed by changing the phase-shift phase theta of the led-in phase shift, meanwhile the filtering wavelengths of the slits can be further finely regulated, and the filtering quantity of the filter can be changed by changing the quantity m of the led-in phase shift.
Description
Technical field
The present invention relates to fiber optic communication, instrument field, a kind of based on the multi-wavelength tunable wave filter protecting inclined chirped fiber grating specifically.
Background technology
Development along with communication technology, communication service will turn to the broadband services being representative with high speed IP data and multimedia, bandwidth and the capacity of optical communication network are proposed increasingly higher requirement by this, and the ripe application of dense wave division multipurpose (DWDM) technology greatly improves the capacity of optical fiber telecommunications system. Along with the increase of dwdm system optical channel number, various optics multiple wavelengths filter technology become the study hotspot of the current optical fiber communications field.
In recent years, have already been proposed a lot of optics multiple wavelengths filter technology, wherein mainly include Fabry-Perot resonance filter (StoneJ, StulzLW.Pigtailedhigh-finessetunablefibreFabry-Perotinte rferometerswithlarge, mediumandsmallfreespectralranges [J] .Electronicsletters, 1987, 23 (15): 781-783), Mach-Zehnder interference filter (AhnJT, LeeHK, JeonMY, etal.Continuouslytunablemulti-wavelengthtransmissionfilt erbasedonastabilisedfibre-opticinterferometer [J] .Opticscommunications, 1999, 165 (1): 33-37.), Sagnac ring interference filter (ShuX, JiangS, HuangD.FibergratingSagnacloopanditsmulti-wavelengthlaser application [J] .PhotonicsTechnologyLetters, IEEE, 2000, 12 (8): 980-982.), twin-core fiber mode filter (OrtegaB, DongL.Accuratetuningofmismatchedtwin-corefiberfilters [J] .Opticsletters, 1998, 23 (16): 1277-1279.), and mole grating type wave filter (ChenLR that warbles, CooperDJF, SmithPWE.Transmissionfilterswithmultipleflattenedpassban dsbasedonchirpedMoir é gratings [J] .PhotonicsTechnologyLetters, IEEE, 1998, 10 (9): 1283-1285.).But, all there are some problems in the multiple wavelengths filter of these several schemes. Fabry-Perot resonance filter needs to meet specific matching condition when realizing multi-wavelength, and after the chamber length of Fabry-Perot resonator cavity is determined, the wavelength number of wave filter can not regulate and control. Mach-Zehnder interference filter is in manufacturing process, the vibration of temperature and external environment is all comparatively sensitive, and the two of Mach-Zehnder interference filter arm length difference can not be too big, make the use of Mach-Zehnder interference filter can not reach the degree of commercialization. Sagnac ring interferes filter to need Fiber Bragg Grating or insertion high birefringence optical fiber on ring, and after Sagnac ring interferes filter to be successful, wavelength number can not regulate and control. The complex manufacturing process of twin-core fiber mode filter, and the extinction ratio of wave filter is very low. Mole wavelength number of grating type wave filter of warbling is to be determined by the dislocation distance of two chirped fiber gratings, can not regulate and control after making also in wave filter.
Summary of the invention
The present invention is to provide and can realize Wavelength tunable within the scope of full bandwidth and controlled a kind of based on the multi-wavelength tunable wave filter protecting inclined chirped fiber grating of wavelength number. Scheme adopts and writes on chirped fiber grating on polarization maintaining optical fibre, and obtains multiple wavelengths filter protecting the mode introducing phase shift on inclined chirped fiber grating. The frequency spectrum protecting inclined chirped fiber grating has two symmetrical wideband polarization transmission bands, after introducing phase shift, all there is corresponding extremely narrow slit in two wideband polarization transmission bands, the position that slit occurs in bandwidth range can be changed by changing the position introducing phase shift, change the phase-shift phase θ introducing phase shift and can change the transmission depth of slit, also can finely regulate the centre wavelength of slit simultaneously, change the number m introducing phase shift, thus it is possible to vary the filter wavelength number of this wave filter. The range of accommodation of the phase shift position that this programme can realize is optional position on chirped fiber grating, and the range of accommodation of phase-shift phase θ is 0≤θ≤2 π, and the range of accommodation of the number m of phase shift is 1≤m≤4.
The technical scheme is that
It is a kind of based on the multi-wavelength tunable wave filter protecting inclined chirped fiber grating, it is characterised in that: this multi-wavelength tunable wave filter is on the basis writing chirped fiber grating on polarization maintaining optical fibre, and chirping phase-shift optical fiber grating is introduced phase shift. Polarization maintaining optical fibre has stress axis X, stress axis Y and fibre core, under the effect of stress axis X and stress axis Y, fibre core is different with the refractive index in Y-axis in X-axis, form dielectric grid, so that the spectral shaping of the chirped fiber grating on polarization maintaining optical fibre has two symmetrical polarization transmission bands. The polarization transmission on the left side frequency spectrum with the chirped fiber grating on correspondence stress axis X, the polarization transmission on the right frequency spectrum with the chirped fiber grating on correspondence stress axis Y, and the bandwidth of each polarization transmission band is consistent with the bandwidth of the chirped fiber grating on ordinary optic fibre.
After introducing phase shift on chirped fiber grating, two polarization transmission spectrums of chirped fiber grating all there will be corresponding extremely narrow slit, the position that slit occurs in bandwidth range can be changed by changing the position introducing phase shift, change the phase-shift phase θ introducing phase shift and can change the transmission depth of slit, also can finely regulate the filter wavelength of slit simultaneously, change the number m introducing phase shift, thus it is possible to vary the filtering number of this wave filter.
Described polarization maintaining optical fibre includes panda type polarization-preserving fiber, bow-tie type polarization maintaining optical fibre and oval stress type polarization maintaining optical fibre.
Change the position introducing phase shift on chirped fiber grating, it is possible to achieve should based on the tuning on a large scale of the multi-wavelength tunable wave filter protecting inclined chirped fiber grating.
Change the phase-shift phase θ, 0≤θ≤2 π that introduce phase shift on chirped fiber grating, it is possible to achieve should based on the fine tuning in the little scope of the multi-wavelength tunable wave filter of the inclined chirped fiber grating of guarantor.
Change the number m introducing phase shift on chirped fiber grating, 1≤m≤4, it is possible to achieve should based on the tuning of the filter wavelength number of the multi-wavelength tunable wave filter protecting inclined chirped fiber grating.
The specific works principle of the present invention is as follows:
Writing chirped fiber grating on polarization maintaining optical fibre, because polarization maintaining optical fibre has two polarization states, the frequency spectrum protecting inclined chirped fiber grating has two symmetrical polarization transmission bands. The polarization transmission on the left side frequency spectrum with the chirped fiber grating on correspondence stress axis X, the polarization transmission on the right frequency spectrum with the chirped fiber grating on correspondence stress axis Y, and the bandwidth of each polarization transmission band is consistent with the bandwidth of the chirped fiber grating on ordinary optic fibre.
When protecting introducing phase shift on inclined chirped fiber grating, protect in two polarization transmission spectrums of inclined chirped fiber grating and all there will be corresponding extremely narrow slit, the position that slit occurs in bandwidth range can be changed by changing the position introducing phase shift, change the phase-shift phase θ introducing phase shift and can change the transmission depth of slit, also can finely regulate the centre wavelength of slit simultaneously, change the number m introducing phase shift, thus it is possible to vary the filter wavelength number of this wave filter.
The present invention is had the advantage that as follows:
The present invention proposes a kind of based on the multi-wavelength tunable wave filter protecting inclined chirped fiber grating. This multi-wavelength tunable wave filter is to protect formation on the basis introducing phase shift on inclined chirped fiber grating. The frequency spectrum protecting inclined chirped fiber grating being not introduced into phase shift has two symmetrical polarization transmission bands, and after introducing phase shift, protect and the polarization transmission band of inclined chirped fiber grating occurs corresponding extremely narrow slit, the position that slit occurs in bandwidth range can be changed by changing the position z introducing phase shift, change the phase-shift phase θ introducing phase shift and can change the transmission depth of slit, also can finely regulate the centre wavelength of slit simultaneously, change the number m introducing phase shift, thus it is possible to vary the filter wavelength number of this wave filter. Compared with other optical filters, the present invention further increases the wave-length coverage of wave filter, adds the filter wavelength of wave filter and the controllability of filtering number simultaneously.
Accompanying drawing explanation
A kind of structural representation based on the multi-wavelength tunable wave filter protecting inclined chirped fiber grating of Fig. 1.
Fig. 2 is not introduced into the spectrum diagram protecting inclined chirped fiber grating during phase shift.
When Fig. 3 introduces phase shift and phase-shift phase θ=π in chirped fiber grating original position, based on the frequency spectrum of the multi-wavelength tunable wave filter protecting inclined chirped fiber grating.
When Fig. 4 introduces phase shift and phase-shift phase θ=π in chirped fiber grating centre position, based on the frequency spectrum of the multi-wavelength tunable wave filter protecting inclined chirped fiber grating.
When Fig. 5 introduces phase shift and phase-shift phase θ=π at chirped fiber grating terminal position, based on the frequency spectrum of the multi-wavelength tunable wave filter protecting inclined chirped fiber grating.
When Fig. 6 introduces phase shift and π/3, phase-shift phase θ=2 in chirped fiber grating centre position, based on the frequency spectrum of the multi-wavelength tunable wave filter protecting inclined chirped fiber grating.
When Fig. 7 introduces phase shift and π/3, phase-shift phase θ=4 in chirped fiber grating centre position, based on the frequency spectrum of the multi-wavelength tunable wave filter protecting inclined chirped fiber grating.
When Fig. 8 is simultaneously introduced 2 phase shifts and phase-shift phase θ=π on chirped fiber grating, based on the frequency spectrum of the multi-wavelength tunable wave filter protecting inclined chirped fiber grating.
When Fig. 9 is simultaneously introduced 4 phase shifts and phase-shift phase θ=π on chirped fiber grating, based on the frequency spectrum of the multi-wavelength tunable wave filter protecting inclined chirped fiber grating.
Detailed description of the invention
It is further described based on the multi-wavelength tunable wave filter protecting inclined chirped fiber grating below in conjunction with 1 to 9 pair, accompanying drawing.
Embodiment one
A kind of based on the multi-wavelength tunable wave filter protecting inclined chirped fiber grating, as it is shown in figure 1, this multi-wavelength tunable wave filter is on the basis of write chirped fiber grating 15, chirping phase-shift optical fiber grating 15 to be introduced phase shift 16 on polarization maintaining optical fibre 11. Polarization maintaining optical fibre has stress axis X12, stress axis Y13 and fibre core 14, under the effect of stress axis X13 and stress axis Y14, fibre core 14 is different with the refractive index in Y-axis in X-axis, form dielectric grid, so that the frequency spectrum of the chirped fiber grating 15 on polarization maintaining optical fibre 11 has two symmetrical polarization transmission bands. Protect the transmission spectrum of inclined chirped fiber grating as shown in Figure 2, the polarization transmission on the left side frequency spectrum with the chirped fiber grating on 21 corresponding stress axis X12, the polarization transmission on the right frequency spectrum with the chirped fiber grating on 22 corresponding stress axis Y13, and the bandwidth of each polarization transmission band is consistent with the bandwidth of the chirped fiber grating on ordinary optic fibre.
After introducing phase shift 16 on chirped fiber grating 15, two polarization transmission spectrums 21 and 22 of chirped fiber grating 15 all there will be corresponding extremely narrow slit, the position that slit occurs in bandwidth range can be changed by changing the position introducing phase shift, change the phase-shift phase θ introducing phase shift and can change the transmission depth of slit, also can finely regulate the filter wavelength of slit simultaneously, change the number m introducing phase shift, thus it is possible to vary the filtering number of this wave filter.
Described polarization maintaining optical fibre 11 adopts panda type polarization-preserving fiber.
The length arranging chirped fiber grating 15 is 6cm, introduces phase shift at the original position 0.5cm place of chirped fiber grating.
It is arranged on phase shift theta=π that the original position of chirped fiber grating 15 introduces.
It is arranged on the number m=1 introducing phase shift on chirped fiber grating 15, should based on the frequency spectrum of the multi-wavelength tunable wave filter of the inclined chirped fiber grating of guarantor as shown in Figure 3.
Embodiment two
A kind of based on the multi-wavelength tunable wave filter protecting inclined chirped fiber grating, as it is shown in figure 1, this multi-wavelength tunable wave filter is on the basis of write chirped fiber grating 15, chirping phase-shift optical fiber grating 15 to be introduced phase shift 16 on polarization maintaining optical fibre 11. Polarization maintaining optical fibre has stress axis X12, stress axis Y13 and fibre core 14, under the effect of stress axis X13 and stress axis Y14, fibre core 14 is different with the refractive index in Y-axis in X-axis, form dielectric grid, so that the frequency spectrum of the chirped fiber grating 15 on polarization maintaining optical fibre 11 has two symmetrical polarization transmission bands. Protect the transmission spectrum of inclined chirped fiber grating as shown in Figure 2, the polarization transmission on the left side frequency spectrum with the chirped fiber grating on 21 corresponding stress axis X12, the polarization transmission on the right frequency spectrum with the chirped fiber grating on 22 corresponding stress axis Y13, and the bandwidth of each polarization transmission band is consistent with the bandwidth of the chirped fiber grating on ordinary optic fibre.
After introducing phase shift 16 on chirped fiber grating 15, two polarization transmission spectrums 21 and 22 of chirped fiber grating 15 all there will be corresponding extremely narrow slit, the position that slit occurs in bandwidth range can be changed by changing the position introducing phase shift, change the phase-shift phase θ introducing phase shift and can change the transmission depth of slit, also can finely regulate the filter wavelength of slit simultaneously, change the number m introducing phase shift, thus it is possible to vary the filtering number of this wave filter.
Described polarization maintaining optical fibre 11 adopts panda type polarization-preserving fiber.
The length arranging chirped fiber grating 15 is 6cm, introduces phase shift at the 3.0cm place, centre position of chirped fiber grating.
It is arranged on phase shift theta=π that the centre position of chirped fiber grating 15 introduces.
It is arranged on the number m=1 introducing phase shift on chirped fiber grating 15, should based on the frequency spectrum of the multi-wavelength tunable wave filter of the inclined chirped fiber grating of guarantor as shown in Figure 4.
Embodiment three
A kind of based on the multi-wavelength tunable wave filter protecting inclined chirped fiber grating, as it is shown in figure 1, this multi-wavelength tunable wave filter is on the basis of write chirped fiber grating 15, chirping phase-shift optical fiber grating 15 to be introduced phase shift 16 on polarization maintaining optical fibre 11. Polarization maintaining optical fibre has stress axis X12, stress axis Y13 and fibre core 14, under the effect of stress axis X13 and stress axis Y14, fibre core 14 is different with the refractive index in Y-axis in X-axis, form dielectric grid, so that the frequency spectrum of the chirped fiber grating 15 on polarization maintaining optical fibre 11 has two symmetrical polarization transmission bands. Protect the transmission spectrum of inclined chirped fiber grating as shown in Figure 2, the polarization transmission on the left side frequency spectrum with the chirped fiber grating on 21 corresponding stress axis X12, the polarization transmission on the right frequency spectrum with the chirped fiber grating on 22 corresponding stress axis Y13, and the bandwidth of each polarization transmission band is consistent with the bandwidth of the chirped fiber grating on ordinary optic fibre.
After introducing phase shift 16 on chirped fiber grating 15, two polarization transmission spectrums 21 and 22 of chirped fiber grating 15 all there will be corresponding extremely narrow slit, the position that slit occurs in bandwidth range can be changed by changing the position introducing phase shift, change the phase-shift phase θ introducing phase shift and can change the transmission depth of slit, also can finely regulate the filter wavelength of slit simultaneously, change the number m introducing phase shift, thus it is possible to vary the filtering number of this wave filter.
Described polarization maintaining optical fibre 11 adopts panda type polarization-preserving fiber.
The length arranging chirped fiber grating 15 is 6cm, introduces phase shift at the terminal position 5.5cm place of chirped fiber grating.
It is arranged on phase shift theta=π that the terminal position of chirped fiber grating 15 introduces.
It is arranged on the number m=1 introducing phase shift on chirped fiber grating 15, should based on the frequency spectrum of the multi-wavelength tunable wave filter of the inclined chirped fiber grating of guarantor as shown in Figure 5.
Embodiment four
A kind of based on the multi-wavelength tunable wave filter protecting inclined chirped fiber grating, as it is shown in figure 1, this multi-wavelength tunable wave filter is on the basis of write chirped fiber grating 15, chirping phase-shift optical fiber grating 15 to be introduced phase shift 16 on polarization maintaining optical fibre 11. Polarization maintaining optical fibre has stress axis X12, stress axis Y13 and fibre core 14, under the effect of stress axis X13 and stress axis Y14, fibre core 14 is different with the refractive index in Y-axis in X-axis, form dielectric grid, so that the frequency spectrum of the chirped fiber grating 15 on polarization maintaining optical fibre 11 has two symmetrical polarization transmission bands. Protect the transmission spectrum of inclined chirped fiber grating as shown in Figure 2, the polarization transmission on the left side frequency spectrum with the chirped fiber grating on 21 corresponding stress axis X12, the polarization transmission on the right frequency spectrum with the chirped fiber grating on 22 corresponding stress axis Y13, and the bandwidth of each polarization transmission band is consistent with the bandwidth of the chirped fiber grating on ordinary optic fibre.
After introducing phase shift 16 on chirped fiber grating 15, two polarization transmission spectrums 21 and 22 of chirped fiber grating 15 all there will be corresponding extremely narrow slit, the position that slit occurs in bandwidth range can be changed by changing the position introducing phase shift, change the phase-shift phase θ introducing phase shift and can change the transmission depth of slit, also can finely regulate the filter wavelength of slit simultaneously, change the number m introducing phase shift, thus it is possible to vary the filtering number of this wave filter.
Described polarization maintaining optical fibre 11 adopts bow-tie type polarization maintaining optical fibre.
The length arranging chirped fiber grating 15 is 6cm, introduces phase shift at the 3.0cm place, centre position of chirped fiber grating.
It is arranged on π/3, phase shift theta=2 that the centre position of chirped fiber grating 15 introduces.
It is arranged on the number m=1 introducing phase shift on chirped fiber grating 15, should based on the frequency spectrum of the multi-wavelength tunable wave filter of the inclined chirped fiber grating of guarantor as shown in Figure 6.
Embodiment five
A kind of based on the multi-wavelength tunable wave filter protecting inclined chirped fiber grating, as it is shown in figure 1, this multi-wavelength tunable wave filter is on the basis of write chirped fiber grating 15, chirping phase-shift optical fiber grating 15 to be introduced phase shift 16 on polarization maintaining optical fibre 11. Polarization maintaining optical fibre has stress axis X12, stress axis Y13 and fibre core 14, under the effect of stress axis X13 and stress axis Y14, fibre core 14 is different with the refractive index in Y-axis in X-axis, form dielectric grid, so that the frequency spectrum of the chirped fiber grating 15 on polarization maintaining optical fibre 11 has two symmetrical polarization transmission bands. Protect the transmission spectrum of inclined chirped fiber grating as shown in Figure 2, the polarization transmission on the left side frequency spectrum with the chirped fiber grating on 21 corresponding stress axis X12, the polarization transmission on the right frequency spectrum with the chirped fiber grating on 22 corresponding stress axis Y13, and the bandwidth of each polarization transmission band is consistent with the bandwidth of the chirped fiber grating on ordinary optic fibre.
After introducing phase shift 16 on chirped fiber grating 15, two polarization transmission spectrums 21 and 22 of chirped fiber grating 15 all there will be corresponding extremely narrow slit, the position that slit occurs in bandwidth range can be changed by changing the position introducing phase shift, change the phase-shift phase θ introducing phase shift and can change the transmission depth of slit, also can finely regulate the filter wavelength of slit simultaneously, change the number m introducing phase shift, thus it is possible to vary the filtering number of this wave filter.
Described polarization maintaining optical fibre 11 adopts bow-tie type polarization maintaining optical fibre.
The length arranging chirped fiber grating 15 is 6cm, introduces phase shift at the 3.0cm place, centre position of chirped fiber grating.
It is arranged on π/3, phase shift theta=4 that the centre position of chirped fiber grating 15 introduces.
It is arranged on the number m=1 introducing phase shift on chirped fiber grating 15, should based on the frequency spectrum of the multi-wavelength tunable wave filter of the inclined chirped fiber grating of guarantor as shown in Figure 7.
Embodiment six
A kind of based on the multi-wavelength tunable wave filter protecting inclined chirped fiber grating, as it is shown in figure 1, this multi-wavelength tunable wave filter is on the basis of write chirped fiber grating 15, chirping phase-shift optical fiber grating 15 to be introduced phase shift 16 on polarization maintaining optical fibre 11. Polarization maintaining optical fibre has stress axis X12, stress axis Y13 and fibre core 14, under the effect of stress axis X13 and stress axis Y14, fibre core 14 is different with the refractive index in Y-axis in X-axis, form dielectric grid, so that the frequency spectrum of the chirped fiber grating 15 on polarization maintaining optical fibre 11 has two symmetrical polarization transmission bands. Protect the transmission spectrum of inclined chirped fiber grating as shown in Figure 2, the polarization transmission on the left side frequency spectrum with the chirped fiber grating on 21 corresponding stress axis X12, the polarization transmission on the right frequency spectrum with the chirped fiber grating on 22 corresponding stress axis Y13, and the bandwidth of each polarization transmission band is consistent with the bandwidth of the chirped fiber grating on ordinary optic fibre.
After introducing phase shift 16 on chirped fiber grating 15, two polarization transmission spectrums 21 and 22 of chirped fiber grating 15 all there will be corresponding extremely narrow slit, the position that slit occurs in bandwidth range can be changed by changing the position introducing phase shift, change the phase-shift phase θ introducing phase shift and can change the transmission depth of slit, also can finely regulate the filter wavelength of slit simultaneously, change the number m introducing phase shift, thus it is possible to vary the filtering number of this wave filter.
Described polarization maintaining optical fibre 11 adopts oval stress type polarization maintaining optical fibre.
The length arranging chirped fiber grating 15 is 6cm, and on chirped fiber grating, 1.8cm and 4.2cm place introduces phase shift.
Be arranged on chirped fiber grating 15 introduce phase shift theta1=θ2=π.
It is arranged on the number m=2 introducing phase shift on chirped fiber grating 15, should based on the frequency spectrum of the multi-wavelength tunable wave filter of the inclined chirped fiber grating of guarantor as shown in Figure 8.
Embodiment seven
A kind of based on the multi-wavelength tunable wave filter protecting inclined chirped fiber grating, as it is shown in figure 1, this multi-wavelength tunable wave filter is on the basis of write chirped fiber grating 15, chirping phase-shift optical fiber grating 15 to be introduced phase shift 16 on polarization maintaining optical fibre 11. Polarization maintaining optical fibre has stress axis X12, stress axis Y13 and fibre core 14, under the effect of stress axis X13 and stress axis Y14, fibre core 14 is different with the refractive index in Y-axis in X-axis, form dielectric grid, so that the frequency spectrum of the chirped fiber grating 15 on polarization maintaining optical fibre 11 has two symmetrical polarization transmission bands. Protect the transmission spectrum of inclined chirped fiber grating as shown in Figure 2, the polarization transmission on the left side frequency spectrum with the chirped fiber grating on 21 corresponding stress axis X12, the polarization transmission on the right frequency spectrum with the chirped fiber grating on 22 corresponding stress axis Y13, and the bandwidth of each polarization transmission band is consistent with the bandwidth of the chirped fiber grating on ordinary optic fibre.
After introducing phase shift 16 on chirped fiber grating 15, two polarization transmission spectrums 21 and 22 of chirped fiber grating 15 all there will be corresponding extremely narrow slit, the position that slit occurs in bandwidth range can be changed by changing the position introducing phase shift, change the phase-shift phase θ introducing phase shift and can change the transmission depth of slit, also can finely regulate the filter wavelength of slit simultaneously, change the number m introducing phase shift, thus it is possible to vary the filtering number of this wave filter.
Described polarization maintaining optical fibre 11 adopts oval stress type polarization maintaining optical fibre.
The length arranging chirped fiber grating 15 is 6cm, and on chirped fiber grating, 1.2cm, 2.4cm, 3.6cm and 4.8cm place introduces phase shift.
Be arranged on chirped fiber grating 15 introduce phase shift theta1=θ2=θ3=θ4=π.
It is arranged on the number m=4 introducing phase shift on chirped fiber grating 15, should based on the frequency spectrum of the multi-wavelength tunable wave filter of the inclined chirped fiber grating of guarantor as shown in Figure 9.
Claims (2)
1. the multi-wavelength tunable wave filter based on the inclined chirped fiber grating of guarantor, it is characterised in that:
This multi-wavelength tunable wave filter is on the basis writing chirped fiber grating (15) on polarization maintaining optical fibre (11), and chirping phase-shift optical fiber grating (15) is introduced phase shift (16). Polarization maintaining optical fibre has stress axis X (12), stress axis Y (13) and fibre core (14), under the effect of stress axis X (12) and stress axis Y (13), fibre core (14) is different with the refractive index in Y-axis in X-axis, form dielectric grid, so that the frequency spectrum of the chirped fiber grating (15) on polarization maintaining optical fibre (11) has two symmetrical polarization transmission peaks. The frequency spectrum of the chirped fiber grating on the corresponding stress axis X (12) in the polarization transmission peak (21) on the left side, the frequency spectrum of the chirped fiber grating on the corresponding stress axis Y (13) in the polarization transmission peak (22) on the right, and the bandwidth at each polarization transmission peak is consistent with the bandwidth of the chirped fiber grating on ordinary optic fibre.
After introducing phase shift (16) on chirped fiber grating (15), two polarization transmission spectrum (21) and (22) of chirped fiber grating (15) all there will be corresponding extremely narrow slit, the position that slit occurs in bandwidth range can be changed by changing the position introducing phase shift, change the phase-shift phase θ introducing phase shift and can change the transmission depth of slit, also can finely regulate the filter wavelength of slit simultaneously, change the number m introducing phase shift, thus it is possible to vary the filtering number of this wave filter.
2. according to claim 1 a kind of based on the multi-wavelength tunable wave filter protecting inclined chirped fiber grating, it is characterised in that:
Described polarization maintaining optical fibre (11) includes panda type polarization-preserving fiber, bow-tie type polarization maintaining optical fibre and oval stress type polarization maintaining optical fibre.
Change the position introducing phase shift (16) on chirped fiber grating (15), it is possible to achieve should based on the tuning on a large scale of the multi-wavelength tunable wave filter protecting inclined chirped fiber grating.
Change the phase-shift phase θ, 0≤θ≤2 π that introduce phase shift (16) on chirped fiber grating (15), it is possible to achieve should based on the fine tuning in the little scope of the multi-wavelength tunable wave filter of the inclined chirped fiber grating of guarantor.
Change the number m introducing phase shift (16) on chirped fiber grating (15), 1≤m≤4, it is possible to achieve should based on the tuning of the filter wavelength number of the multi-wavelength tunable wave filter protecting inclined chirped fiber grating.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109425590A (en) * | 2017-08-30 | 2019-03-05 | 韩国生产技术研究院 | Multiple gases measure TDLAS alignment simultaneously |
| CN112255722A (en) * | 2020-09-07 | 2021-01-22 | 桂林电子科技大学 | Novel method for preparing chirped fiber Bragg grating by means of uniform grating mask plate |
| CN113260888A (en) * | 2018-11-21 | 2021-08-13 | 康宁股份有限公司 | Optical system comprising a multi-core optical fiber for achieving direct core-to-core coupling |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101320884A (en) * | 2008-06-13 | 2008-12-10 | 华中科技大学 | Chirp phase shift optical fiber optical grating and optical fiber laser based on the same |
| CN201637964U (en) * | 2009-12-31 | 2010-11-17 | 中国计量学院 | Tunable filter based on chirping phase-shift optical fiber grating |
-
2016
- 2016-04-25 CN CN201610260219.4A patent/CN105676347A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101320884A (en) * | 2008-06-13 | 2008-12-10 | 华中科技大学 | Chirp phase shift optical fiber optical grating and optical fiber laser based on the same |
| CN201637964U (en) * | 2009-12-31 | 2010-11-17 | 中国计量学院 | Tunable filter based on chirping phase-shift optical fiber grating |
Non-Patent Citations (5)
| Title |
|---|
| LIANGYING WU ET AL.: "Research on tunable phase shift induced by piezoelectric transducer in linearly chirped fiber Bragg grating with the V-I transmission matrix formalism", 《OPTICS & LASER TECHNOLOGY》 * |
| XUXING CHEN ET AL.: "Phase Shifts Induced by the Piezoelectric Transducers Attached to a Linearly Chirped Fiber Bragg Grating", 《JOURNAL OF LIGHTWAVE TECHNOLOGY》 * |
| 张维叙: "《光纤陀螺及其应用》", 31 December 2008 * |
| 熊海等: "基于啁啾相移光纤光栅的多波长滤波器的研究", 《光电技术应用》 * |
| 赵艳春: "刻在保偏光纤上的相移布拉格光栅反射谱的分析", 《中国优秀博硕士学位论文全文数据库（硕士）基础科学辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109425590A (en) * | 2017-08-30 | 2019-03-05 | 韩国生产技术研究院 | Multiple gases measure TDLAS alignment simultaneously |
| CN109425590B (en) * | 2017-08-30 | 2021-06-11 | 韩国生产技术研究院 | TDLAS alignment system for simultaneously measuring multiple gases |
| CN113260888A (en) * | 2018-11-21 | 2021-08-13 | 康宁股份有限公司 | Optical system comprising a multi-core optical fiber for achieving direct core-to-core coupling |
| US11921366B2 (en) | 2018-11-21 | 2024-03-05 | Corning Incorporated | Optical systems comprising multi-core optical fibers for realizing direct core to core coupling |
| CN112255722A (en) * | 2020-09-07 | 2021-01-22 | 桂林电子科技大学 | Novel method for preparing chirped fiber Bragg grating by means of uniform grating mask plate |
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Application publication date: 20160615 |