CN109633809A - A kind of wide bandwidth long-period fiber grating Written Device - Google Patents
A kind of wide bandwidth long-period fiber grating Written Device Download PDFInfo
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- CN109633809A CN109633809A CN201910073948.2A CN201910073948A CN109633809A CN 109633809 A CN109633809 A CN 109633809A CN 201910073948 A CN201910073948 A CN 201910073948A CN 109633809 A CN109633809 A CN 109633809A
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- mirror
- cylindrical mirror
- fiber grating
- long
- wide bandwidth
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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
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02123—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating
-
- 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
- G02B6/0208—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response
- G02B6/02085—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response characterised by the grating profile, e.g. chirped, apodised, tilted, helical
- G02B6/02095—Long period gratings, i.e. transmission gratings coupling light between core and cladding modes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
The invention discloses a kind of wide bandwidth long-period fiber grating Written Devices, including ultraviolet laser, stepper motor, it turns back mirror, first cylindrical mirror, second cylindrical mirror, fiber fixed frame, ASE, OSA and two MFA, it turns back mirror, first cylindrical mirror, second cylindrical mirror common optical axis is sequentially fixed at stepper motor top surface, ultraviolet laser is located in the input path for mirror of turning back, first cylindrical mirror and the second cylindrical mirror are located on the emitting light path for mirror of turning back, one section of coat is removed on load hydrogen optical fiber to be inscribed, and it is fixed on fiber fixed frame, so that the ultraviolet light beam that ultraviolet laser issues is through mirror of turning back, first cylindrical mirror, it is irradiated to after second cylindrical mirror on the removing coating interval of load hydrogen optical fiber to be inscribed, it carries hydrogen optical fiber one end and ASE is connected by MFA, the other end connects OSA by MFA.The present invention can improve long-period gratings bandwidth to 100nm or more, and the wide bandwidth long-period fiber grating application field inscribed out can provide convenience more extensively for subsequent applications research.
Description
Technical field
The invention belongs to fiber grating fields, and in particular to a kind of ultraviolet light inscribes the dress of wide bandwidth long-period fiber grating
It sets.
Background technique
Two major classes can be divided into according to the length in period in fiber grating: the period is known as short cycle or reflection less than 1 μm
Type fiber grating, i.e. bragg grating (FBG)；Period is tens to several hundred microns even longer referred to as transmission-type or length
Period optical fiber grating (LPFG).1978, Hill of Canadian CRC Communications Research Center et al. was mixing germanium light using standing wave method for the first time
The fiber bragg grating coupled between first permanent realization reverse mode in the world is developed in fibre.1996,
A.M.Vengsarkar et al. irradiates hydrogen bearing SiGe optical fiber by vibration amplitude mask plate with ultraviolet light, has been developed into first typically now
Long-period fiber grating (LPFG) in meaning.1996, Bhatia et al. had studied in detail the various spies of long-period fiber grating
Property, it is proposed in communication and the application in sensory field.1997, the angle further investigation of T.Erdogan slave pattern coupling
The spectral characteristic of long-period fiber grating, to establish the theoretical basis of long-period fiber grating.1998, Davis etc.
People has been put forward for the first time the technology with CO2 laser pulse Myocardial revascularization bylaser long-period fiber grating, makes the production of long-period fiber grating
A new developing stage is entered with application.Long-period fiber grating (LPFG), screen periods are at 100 μm or more, in LPFG
Happens is that the coupling between core mode and a series of cladding mode (or radiation mode) of symports, no retroreflection.From fibre core
From the point of view of mould, the transmitted spectrum of LPFG is a series of discrete loss bands, and each loss is with a kind of corresponding packet for participating in coupling
Layer mould.Its characteristic is to lose optically coupling to going in covering certain frequency range in guided wave.The spectrum of long-period fiber grating
Characteristic generally requires 3 parameters to describe, i.e. resonance wavelength, peak loss rate and bandwidth.
Summary of the invention
The purpose of the present invention is to provide a kind of wide bandwidth long-period fiber grating Written Devices, can be by long-period gratings band
Width is improved to 100nm or more.
The technical solution for realizing the aim of the invention is as follows: a kind of wide bandwidth long-period fiber grating Written Device, including
Ultraviolet laser, stepper motor, mirror of turning back, the first cylindrical mirror, the second cylindrical mirror, fiber fixed frame, ASE, OSA and two MFA,
Turn back mirror, the first cylindrical mirror, the second cylindrical mirror common optical axis is sequentially fixed at stepper motor top surface, and ultraviolet laser is located at mirror of turning back
Input path on, the first cylindrical mirror and the second cylindrical mirror are located on the emitting light path for mirror of turning back, in load hydrogen optical fiber to be inscribed
One section of coat of upper removing, and be fixed on fiber fixed frame, so that the ultraviolet light beam that ultraviolet laser issues is through turning back
It is irradiated to after mirror, the first cylindrical mirror, the second cylindrical mirror on the removing coating interval of load hydrogen optical fiber to be inscribed, load hydrogen to be inscribed
Optical fiber one end connects OSA by MFA by MFA connection ASE, the other end.
Further, the optical axis of the first cylindrical mirror and the second cylindrical mirror is mutually perpendicular to, and one for ultraviolet light beam Y-axis side
To compression, another compresses ultraviolet light beam X-direction.
Compared with prior art, the present invention its remarkable advantage is:
(1) on the basis of not increasing laser power and time for exposure, the irradiation that light beam can be made more to converge exists
On optical fiber, the utilization rate of ultraviolet light is improved.
(2) the wide bandwidth long-period fiber grating application field inscribed out can provide more extensively for subsequent applications research
Convenience.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of wide bandwidth long-period fiber grating Written Device of the present invention.
Fig. 2 is practical inscription wide bandwidth long-period fiber grating spectrogram of the invention.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
The bandwidth that the present invention refers to bandwidth, expression formula between the zero point of loss peak two sides is as follows.
Wherein, Δ λ indicates bandwidth between the zero point of loss peak two sides, λdIndicate that the design wavelength of long-period gratings, κ indicate coupling
Constant, L indicate the length of long-period gratings, and N indicates the periodicity of grating.
It is recognised that design resonance wavelength, the periodicity and κ L of grating all can be between bandwidth zero point from expression formula
Have an impact.When designing resonance wave long value and κ L is consistent, the periodicity of grating is reduced, and bandwidth will increase.It is each at present
The bandwidth of long-period fiber grating reported in the literature is generally a few to tens of nanometers.Set forth herein a kind of wide bandwidth long period optical fiber
The Written Device of grating can improve the bandwidth of long-period fiber grating to 100nm or more.
In conjunction with Fig. 1, a kind of wide bandwidth long-period fiber grating Written Device, including
Ultraviolet laser；
Stepper motor can be achieved gradually to move by computer control；
It turns back mirror, thus it is possible to vary propagate beam direction；
First cylindrical mirror compresses ultraviolet light beam Y direction；
Second cylindrical mirror compresses ultraviolet light beam X-direction；
Optical fiber to be inscribed is placed on fixed frame by fiber fixed frame；
Optical fiber and wire jumper can be linked together and effectively reduce splice loss, splice attenuation by mould field adaptation (MFA)；
Wideband light source (ASE) provides signal source to inscribe real-time monitoring；
Spectrometer (OSA), it is possible to implement the spectral shape of long-period gratings is inscribed in monitoring.
Turn back mirror, the first cylindrical mirror, the second cylindrical mirror common optical axis is sequentially fixed at stepper motor top surface, ultraviolet laser position
In in the input path for turning back mirror, the first cylindrical mirror and the second cylindrical mirror are located on the emitting light path for mirror of turning back, to be inscribed
It carries and removes one section of coat on hydrogen optical fiber, and be fixed on fiber fixed frame, so that the ultraviolet light that ultraviolet laser issues
Shu Jing, which turns back, to be irradiated to after mirror, the first cylindrical mirror, the second cylindrical mirror on the removing coating interval of load hydrogen optical fiber to be inscribed, to be etched
The load hydrogen optical fiber one end write connects OSA by MFA by MFA connection ASE, the other end.
Ultraviolet laser launches ultraviolet light beam, beats behind the direction of propagation by changing optical path after mirror of turning back in the first cylinder
On mirror, the first cylindrical mirror is carried out Y direction compression；Compressed ultraviolet light beam continues through the second cylindrical mirror, the second column
Face mirror carries out the compression of X-direction to it.The purpose of first cylindrical mirror and the second cylindrical mirror is further to converge ultraviolet light beam
It is poly-, the energy centralization of eye point can be made in this way but also reduce the spot diameter of eye point.The coating of hydrogen optical fiber interlude will be carried
Layer strips, and is fixed on fiber fixed frame.Ultraviolet laser and stepper motor are controlled by computer, can be inscribed point by point
Long-period fiber grating.
The one end for carrying hydrogen optical fiber is connect by welding with the MFA that its model matches, then by MFA wire jumper end and wideband light source
Connection.The other end for carrying hydrogen optical fiber is connect by welding with the MFA that its model matches, then MFA wire jumper is terminated into spectrum
Instrument.The above process can realize that long-period fiber grating inscribes the real-time monitoring of spectrum.
Fig. 2 is that the present invention actually inscribes out long-period fiber grating spectrogram, the long period light known to from the spectrogram
It is 160nm, transmission depth 23dB that peak bandwidth, which is lost, in grid zero.
Claims (6)
1. a kind of wide bandwidth long-period fiber grating Written Device, it is characterised in that: including ultraviolet laser, stepper motor, folding
Tilting mirror, the first cylindrical mirror, the second cylindrical mirror, fiber fixed frame, ASE, OSA and two MFA, mirror of turning back, the first cylindrical mirror, second
Cylindrical mirror common optical axis is sequentially fixed at stepper motor top surface, and ultraviolet laser is located in the input path for mirror of turning back, the first cylinder
Mirror and the second cylindrical mirror are located on the emitting light path for mirror of turning back, and one section of coat are removed on load hydrogen optical fiber to be inscribed, and will
It is fixed on fiber fixed frame, mirror, the first cylindrical mirror, the second cylinder so that the ultraviolet light beam that ultraviolet laser issues is turned back
It is irradiated to after mirror on the removing coating interval of load hydrogen optical fiber to be inscribed, load hydrogen optical fiber one end to be inscribed passes through MFA connection
ASE, the other end connect OSA by MFA.
2. wide bandwidth long-period fiber grating Written Device according to claim 1, it is characterised in that: the first cylindrical mirror and
The optical axis of second cylindrical mirror is mutually perpendicular to, and one for the compression of ultraviolet light beam Y direction, another to be to ultraviolet light beam X-axis side
To compression.
3. wide bandwidth long-period fiber grating Written Device according to claim 1, it is characterised in that: ASE is to inscribe in fact
When monitoring provide signal source.
4. wide bandwidth long-period fiber grating Written Device according to claim 1, it is characterised in that: OSA implements monitoring
Inscribe the spectral shape of long-period gratings.
5. wide bandwidth long-period fiber grating Written Device according to claim 1, it is characterised in that: MFA will be wait inscribe
Load hydrogen optical fiber link together with wire jumper, and effectively reduce splice loss, splice attenuation.
6. wide bandwidth long-period fiber grating Written Device according to claim 1, it is characterised in that: the first cylindrical mirror,
Second cylindrical mirror is all made of the cylindrical mirror that can penetrate ultraviolet light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910073948.2A CN109633809A (en) | 2019-01-25 | 2019-01-25 | A kind of wide bandwidth long-period fiber grating Written Device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910073948.2A CN109633809A (en) | 2019-01-25 | 2019-01-25 | A kind of wide bandwidth long-period fiber grating Written Device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380323A (en) * | 2019-06-24 | 2019-10-25 | 南京信息职业技术学院 | A kind of all -fiber high-order cladding mode optical fiber laser and manufacturing method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101266319A (en) * | 2008-04-21 | 2008-09-17 | 山东大学 | Long period optical fibre grating ultraviolet laser point-to-point writing method |
| CN201181343Y (en) * | 2008-04-21 | 2009-01-14 | 山东大学 | Apparatus for long period optical fiber optical grating ultraviolet laser point-to-point write-in method |
| CN103777270A (en) * | 2014-02-11 | 2014-05-07 | 武汉理工大学 | Device and method for automatic, static continuous preparation of fiber bragg grating array |
| CN103928902A (en) * | 2014-04-23 | 2014-07-16 | 国家海洋局北海海洋技术保障中心 | Universal bearing device for connecting steel cable and outboard surveying device and manufacturing method thereof |
| CN108663746A (en) * | 2018-06-28 | 2018-10-16 | 深圳伊讯科技有限公司 | A kind of continuous Written Device of fiber grating and method of difference centre wavelength |
| CN208172292U (en) * | 2018-06-14 | 2018-11-30 | 宝鸡文理学院 | Long-period fiber grating preparation facilities |
-
2019
- 2019-01-25 CN CN201910073948.2A patent/CN109633809A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101266319A (en) * | 2008-04-21 | 2008-09-17 | 山东大学 | Long period optical fibre grating ultraviolet laser point-to-point writing method |
| CN201181343Y (en) * | 2008-04-21 | 2009-01-14 | 山东大学 | Apparatus for long period optical fiber optical grating ultraviolet laser point-to-point write-in method |
| CN103777270A (en) * | 2014-02-11 | 2014-05-07 | 武汉理工大学 | Device and method for automatic, static continuous preparation of fiber bragg grating array |
| CN103928902A (en) * | 2014-04-23 | 2014-07-16 | 国家海洋局北海海洋技术保障中心 | Universal bearing device for connecting steel cable and outboard surveying device and manufacturing method thereof |
| CN208172292U (en) * | 2018-06-14 | 2018-11-30 | 宝鸡文理学院 | Long-period fiber grating preparation facilities |
| CN108663746A (en) * | 2018-06-28 | 2018-10-16 | 深圳伊讯科技有限公司 | A kind of continuous Written Device of fiber grating and method of difference centre wavelength |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380323A (en) * | 2019-06-24 | 2019-10-25 | 南京信息职业技术学院 | A kind of all -fiber high-order cladding mode optical fiber laser and manufacturing method |
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