CN1415981A - Method for preparing optical fiber grating with freely cutting any toe part as well as the system - Google Patents
Method for preparing optical fiber grating with freely cutting any toe part as well as the system Download PDFInfo
- Publication number
- CN1415981A CN1415981A CN02146019A CN02146019A CN1415981A CN 1415981 A CN1415981 A CN 1415981A CN 02146019 A CN02146019 A CN 02146019A CN 02146019 A CN02146019 A CN 02146019A CN 1415981 A CN1415981 A CN 1415981A
- Authority
- CN
- China
- Prior art keywords
- toe
- diaphragm
- grating
- fiber
- transfer table
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 46
- 239000013307 optical fiber Substances 0.000 title claims description 30
- 238000005520 cutting process Methods 0.000 title claims description 21
- 239000000835 fiber Substances 0.000 claims abstract description 42
- 238000012546 transfer Methods 0.000 claims description 30
- 230000006870 function Effects 0.000 claims description 24
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 238000003672 processing method Methods 0.000 abstract 1
- 238000000985 reflectance spectrum Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000002310 reflectometry Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000013519 translation Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Substances [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005315 distribution function Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Landscapes
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
A processing method of fiber grating for freely apodizing characterizes in firstly taking diaphragm and thin iron plate as templates of apodizing and inversedapodizing, using microcomputer to control an excimer pulse ultraviolet laser and a rotary moving station fixing the diaphragm, and controlling the movement of the rotary moving station and laser pulse number with software enabling it move according to the predesigned apodization function curve and driving the diaphragm to rotate to scan to the fiber to make exposing volume of fiber axial each point to distribute according to the apodizing function curve so as to get the desired apodization grating. Secondly, using thin iron plate to replace the diaphragm and removing the phase template close to the fiber to input related inverse ap function parameter to fill and level the mean index of refraction and exercise inversed apodizing.
Description
Technical field:
The method for making and the system thereof of cutting the fiber grating of toe arbitrarily belong to the fiber grating manufacture technology field.
Background technology:
The invention belongs to photoelectron technology and technical field of optical fiber communication.Be particularly related to the fiber grating manufacturing technology.
Since fiber grating comes out, experienced the course of two more than ten years.The manufacturing technology of fiber grating has also experienced several times and has changed.People such as K.Hill at first invented wrting method in the fiber grating in 1978, write light inlet and were introduced by the end face of optical fiber, form standing wave and realize that grating writes in optical fiber.1989, people such as G.Meltz invented the outer wrting method of optical fiber Bragg raster, promptly holographic wrting method, and light writes from the side of optical fiber, utilizes the coherence of light directly to form interference fringe on optical fiber.After 1993, people such as K.O.Hill have proposed phase mask method (Phase mask) in succession, point-to-point writing method (Point-by-point) and scanning wrting method.The manufacture difficulty of fiber grating has been simplified in the proposition of phase mask method greatly, has improved development efficient.The precision and the homogeneity of grating mainly guarantee by phase mask, all do not have very high requirement to the coherence of light source with to the stability of experimental provision.This just makes excimer laser can be used for the making of grating.The energy height of excimer laser, hot spot is more suitable for large-scale production greatly.
Generally, there is more secondary lobe in the reflectance spectrum of fiber grating, and can forms significant ripple (ripple) on the group velocity delay profile of chirped fiber grating.For reducing the vibration in these group delays and the secondary lobe of reflectance spectrum, " cutting toe " of doing the modulate intensity gradual change at the two ends of grating (apodization) handled and can be improved reflection and time lag curve, makes the reflectance spectrum top more smooth, and the edge is more precipitous.The profile of cutting toe is that the Grating Modulation intensity at two ends is very little, increases gradually then, reaches maximum at core.The concrete toe mode of cutting has functions such as Gauss, raised cosine.Carry out the toe of cutting of grating, can be by two mutually conjugate amplitude templates (Fig. 1)---cut toe template and traditional method of indicating the pronunciation of a Chinese character toe template.First step ultraviolet light through cutting toe template, condenser lens and phase mask, produces grating successively on optical fiber; Second step was cut the toe template in order to fill up the inhomogeneous of mean refractive index with the replacement of traditional method of indicating the pronunciation of a Chinese character toe template, removed phase mask simultaneously, made the time of the optical fiber and first step exposure identical.This key of cutting the method for toe is the making of the amplitude template of two conjugation, and traditional line cutting is difficult to guarantee its precision, especially can not guarantee two template phase conjugates.At the different gratings of cutting toe shape and different length, will make corresponding template of cutting toe shape and respective length simultaneously, this has just improved cost greatly, and dirigibility is poor.The toe technology of applying for a patent of cutting, as Fig. 2, the method for utilizing scanning to write, the frequency multiplication argon ion continuous wave laser 8 of 244nm passes through scanning reflection mirror 9 successively, and post lens 11 and phase mask 20 produce grating on optical fiber 6.Order about scanning reflection mirror 9 by scanning translation stage 13 and move, by the residence time of computer programming gated sweep translation stage, control the time shutter of optical fiber diverse location, promptly the two ends time shutter lacks, and the intermediate exposures time is long, thereby realizes the toe of cutting of grating.Its key of this method is the control of time shutter, owing to itself just have a response time between scanning translation stage and the software, is difficult to the accurate time shutter that guarantees.
The objective of the invention is to overcome the weak point of prior art, proposed a kind of arbitrary shape of can realizing and cut the making of method for making and system thereof, particularly small-sized grating of the fiber grating of toe.The present invention adopts the phase mask method, with excimer laser as ultraviolet source, pass through computer programming, control rotation transfer table is dynamically adjusted has the size of certain thickness diaphragm, control the umber of pulse of laser simultaneously by the A/D transition card, can on the standard single-mode fiber that hydrogen carries, produce and have high reflectance, high side mode suppression ratio, the grating of reflectance spectrum flat-top band broad, with the different apodizing function of setting of software input, can make different gratings, make the present invention simpler, economical, practical, be easy to realize having good repeatability and dirigibility.Be convenient to business enterprise expand application at home.
Among the present invention the secondary lobe that suppresses the fiber grating reflectance spectrum, the apodization of employing, its principle is as follows: with optical grating reflection rate ρ=σ e
J (2 δ z-), the substitution Riccati differential equation:
ρ '=j (ρ+j κ (the 1+ ρ of 2 δ-)
2) can obtain:
σ '=jk[e
-j (2 δ z-)+ σ
2e
J (2 δ z-)] wherein: σ is a reflectivity amplitude, and δ is the off resonance amount, and is a raster phase, and k is a coupling coefficient.To antiradar reflectivity grating, σ
2Item can be ignored, and has
This shows, does not consider phase factor, and in fact amplitude reflectivity is exactly the Fourier conversion of coupling coefficient distribution function.If the just suffered exposure of the coupling coefficient of grating gradually changes along the length direction of grating, make to level off to zero gradually at the two ends of grating, just can improve the characteristic of grating.Coupling coefficient can be selected Blackman, Hamming, Gauss, Tanh, Sinc, functions such as Cauchy for use
The present invention is based on when the Spin Control platform anglec of rotation or velocity variations, and the umber of pulse of optical fiber diverse location changes, and promptly suffered exposure also changes.As shown in Figure 5, when the anglec of rotation of turntable not simultaneously, the actual effectively exposure length of optical fiber also can change.So is along a certain curvilinear motion if make optical fiber in axial exposure, the umber of pulse that must make laser instrument so is along with the anglec of rotation or the speed of Spin Control platform change accordingly.For example, shown in Figure 4 is Gauss's apodizing function curve, X-axis is the length (mm) of grating, Y-axis is that will to make optical fiber be by this curvilinear motion in axial exposure to normalized intensity (a.u), the umber of pulse of corresponding laser instrument is to change curve such as Fig. 5 (a) of the anglec of rotation, X-axis is the anglec of rotation (degree), and Y-axis is corresponding umber of pulse.Simultaneously in order to compensate the inhomogeneous of mean refractive index, corresponding change curve such as Fig. 5 (b).Certainly will make optical fiber is to change along other different function curve in axial exposure, and umber of pulse is got final product with rotational speed or corresponding variation of angle.The present invention adopts in the enterprising line program design of microcomputer, uses micro-processor controlled rotation transfer table of software-driven, a diaphragm is arranged on this platform, by online input apodizing function parameter, thereby by the umber of pulse that system controlled by computer is dynamically adjusted rotational speed or angle and laser instrument change fiber axis to exposure, obtain the different fiber gratings of location shape of cutting at last.
The invention is characterized in: at first, it replaces two mutually conjugate toe template and traditional method of indicating the pronunciation of a Chinese character toe templates of cutting with a diaphragm and a tagger, control quasi-molecule pulsed ultraviolet laser device and fixing rotation transfer table by one of servo control mechanism control simultaneously by the A/D transition card respectively with a microcomputer with certain thickness diaphragm (1), again light-sensitive optical fibre is fixed on the position that can receive the hot spot that sees through from diaphragm (1) and near the optical fiber front phase mask is set, apodizing function parameter by online input setting, control the anglec of rotation of rotation transfer table or the umber of pulse of speed and Ultra-Violet Laser simultaneously with the software that is stored in the microcomputer, the umber of pulse that makes laser instrument along with the motion state of rotation transfer table according to this apodizing function curvilinear motion, and drive diaphragm (1) rotation, then the actual effectively exposure length of optical fiber can change along with the anglec of rotation difference of rotation turntable, fiber axis to the exposure of each point be the umber of pulse of diverse location by the apodizing function curve distribution, obtain the required toe fiber grating of cutting; Secondly, with the diaphragm (1) on the tagger replacement rotation transfer table, remove phase mask simultaneously, import the traditional method of indicating the pronunciation of a Chinese character toe function of corresponding apodizing function, control the motion state of rotation transfer table and the umber of pulse of ultraviolet source simultaneously with the software in the microcomputer, make them according to the motion of traditional method of indicating the pronunciation of a Chinese character toe function curve, fill and lead up the mean refractive index at grating two ends, realize the traditional method of indicating the pronunciation of a Chinese character toe of grating; It is characterized in that: another diaphragm (2) is an adjustable diaphragm, and it has determined the length of the grating that will make; It is characterized in that: when fiber grating is cut toe, it contains: the light-sensitive optical fibre of fixing, phase mask near fiber grating, accept laser pulse that ultraviolet source sends and perpendicular to the post lens of optical axis setting, fixing the rotation transfer table of diaphragm (1), the diaphragm (2) of decision grating length, and, controlling the microcomputer of above-mentioned rotation transfer table and laser instrument respectively through servo control mechanism and A/D transition card as the excimer laser of ultraviolet source.To the fiber grating traditional method of indicating the pronunciation of a Chinese character toe time, it includes fixing light-sensitive optical fibre, accept laser pulse that ultraviolet source sends and the post lens that are provided with perpendicular to optical axis, the rotation transfer table that is fixed with tagger along the optical axis setting, the diaphragm (2) of decision grating length and as the continuous excimer laser of ultraviolet source is being controlled the microcomputer of above-mentioned rotation transfer table and laser instrument respectively through servo control mechanism and A/D transition card.
Facts have proved that it has reached intended purposes.
Description of drawings:
Fig. 1 is two mutually conjugate amplitude template: a, cuts the toe template, b, traditional method of indicating the pronunciation of a Chinese character toe template.
Fig. 2 carries out the Experimental equipment that fiber grating is cut toe for existing phasescan method.
Fig. 3 is incoming laser beam and rotation transfer table relative dynamic graph of a relation.
Fig. 4 is existing Gauss's apodizing function curve.
Fig. 5 is the change curve of rotational speed of the present invention or angle.
Fig. 6 is for having a certain thickness diaphragm (1) and a thin iron plate, and a stitches wide 5mm, stitches thick 5mm; B, wide 5mm, thick 0.4mm.
The Experimental equipment that Fig. 7 cuts toe for fiber grating of the present invention.
Fig. 8 is 1:2000 pulse of reflectance spectrum curve map of the present invention, energy 7.4mJ, pulse step 5, apodizing function a=1; A, tangent toe, b, traditional method of indicating the pronunciation of a Chinese character toe.
Fig. 9 is 2:2000 pulse of reflectance spectrum curve map of the present invention, energy 7.4mJ, pulse step 10, apodizing function a=1.5; A. tangent toe, b. traditional method of indicating the pronunciation of a Chinese character toe.
Figure 10 is 3:1000 pulse of reflectance spectrum curve map of the present invention, energy 7.4mJ, pulse step 2, apodizing function a=1; A. tangent toe, b. traditional method of indicating the pronunciation of a Chinese character toe.
Figure 11 is the toe fiber grating point by point scanning Control Software process flow diagram of cutting of the present invention.
Embodiment:
The device of present embodiment preparing grating method as shown in Figure 7.Wherein, ultraviolet source adopts continuous 248nmBraggstar200 excimer laser 21 (German Tuilaser company produce).The seam of diaphragm (2) 41 is wide to be adjustable, and how many its sizes is, the grating of making is with regard to how long.At first, diaphragm (1) 22 is fixed on the rotation transfer table (Chinese light company of standing upright produces) 23 of RSA100, and rotation transfer table kinematic accuracy is 0.00125 degree.Post lens 37 have the function of focusing and the ultraviolet light of laser instrument 21 output are shone on the even phase mask 24 through diaphragm (1) 22, this phase mask length is 25mm, and ultraviolet light is radiated at carrying on the standard single-mode fiber 25 of processing through hydrogen under it through phase mask 24.RSA100 rotation transfer table 23 links to each other with the com port of microcomputer 19 by a servomechanism 33, and the external trigger mouth of while excimer laser 21 links to each other with the A/D transition card on the microcomputer 19.By the drive software that operation on microcomputer designs in advance, change the rotational angle of rotation transfer table and the output umber of pulse of laser instrument, it is moved according to a certain characteristics of motion, just can obtain the fiber grating that difference is cut the toe shape.Secondly, with the diaphragm (1) on the alternative Spin Control platform of thin iron plate, remove phase mask simultaneously, again by the software on the microcomputer, regulate the motion state of Spin Control platform and the output umber of pulse of laser instrument, make it, realize the traditional method of indicating the pronunciation of a Chinese character toe of grating according to another characteristics of motion operation.
In the whole process of making, adopt spectrum width be 25nm wide spectrum light source 27, can obtain the grating reflection response by circulator 26, while one precision is that the AQ-6317B spectrometer 28 of 0.01nm carries out the test of grating performance, reflectance spectrum and transmitted spectrum to fiber grating are analyzed, and can obtain the performance parameter of fiber grating.
The main technique flow process of present embodiment is as follows:
1. optical fiber is carried hydrogen and handle and peel off coat long about about 30mm;
2. after optical fiber being fixed on phase mask plate, making it to try one's best but do not stick;
3. the external trigger mouth of laser instrument is linked to each other with A/D transition card on the microcomputer, adjust laser instrument, make the light pulse of the about 12mJ of its output;
4. according to the size of the length adjustment diaphragm (2) that will make grating;
5. will have certain thickness diaphragm (1) and be fixed on the RSA100 rotation transfer table, adjust light path, laser is radiated on the fibre core of optical fiber through the hot spot of diaphragm (2), diaphragm (1) and post lens successively;
6. open the RSA100 system of microcomputer, enter the working interface of software, and RSA100 is carried out initialization;
7. start rotation and move, make it can free movement;
8. start the external trigger of laser instrument, making it pass through software can control;
9. the umber of pulse and the frequency of various rotational parameters and laser instrument are set, drive and rotate transfer table and laser instrument follow procedure control operation;
10. with the adjustable diaphragm on the thin iron plate replacement rotation transfer table, remove phase mask simultaneously;
resets relevant parameters, drives rotation transfer table and laser instrument by new parameter operation.
Wherein, the software programming that transfer table motion state and laser instrument are rotated in control is: adopt Visual Basic 6.0 programming languages, on the basis of the hardware driving instruction that RSA100 system and A/D transition card provide, worked out the software that grating is cut toe that carries out based on Windows98 operating system.
Fig. 8,9, the 10th utilizes the typical case of the typical optical fiber grating of present embodiment making to reflect spectrogram.In Figure 11, description be to cut toe processes and procedures FB(flow block), traditional method of indicating the pronunciation of a Chinese character toe process is similar to it, omits.
Evidence; The present invention is applicable to any apodizing function, and the adjustable diaphragm of employing (2) just can adapt to the needs of the length that changes fiber grating, and for making the miniature fiber grating, adaptability is strong, and technology is also simple.
Claims (3)
1, cut the method for making of the fiber grating of toe arbitrarily, contain by two mutually conjugate amplitude templates---cut the toe template and traditional method of indicating the pronunciation of a Chinese character toe template is carried out the step that grating is cut toe, it is characterized in that: at first, it replaces two mutually conjugate toe template and traditional method of indicating the pronunciation of a Chinese character toe templates of cutting with a diaphragm and a tagger, control quasi-molecule pulsed ultraviolet laser device and fixing rotation transfer table by one of servo control mechanism control simultaneously by the A/D transition card respectively with a microcomputer with certain thickness diaphragm (1), again light-sensitive optical fibre is fixed on the position that can receive the hot spot that sees through from diaphragm (1) and near the optical fiber front phase mask is set, apodizing function parameter by online input setting, control the anglec of rotation of rotation transfer table or the umber of pulse of speed and Ultra-Violet Laser simultaneously with the software that is stored in the microcomputer, the umber of pulse that makes laser instrument along with the motion state of rotation transfer table according to this apodizing function curvilinear motion, and drive diaphragm (1) rotation, then the actual effectively exposure length of optical fiber can change along with the anglec of rotation difference of rotation turntable, fiber axis to the exposure of each point be the umber of pulse of diverse location by the apodizing function curve distribution, obtain the required toe fiber grating of cutting; Secondly, with the diaphragm (1) on the tagger replacement rotation transfer table, remove phase mask simultaneously, import the traditional method of indicating the pronunciation of a Chinese character toe function of corresponding apodizing function, control the motion state of rotation transfer table and the umber of pulse of ultraviolet source simultaneously with the software in the microcomputer, make them according to the motion of traditional method of indicating the pronunciation of a Chinese character toe function curve, fill and lead up the mean refractive index at grating two ends, realize the traditional method of indicating the pronunciation of a Chinese character toe of grating.
2, method for making of cutting the fiber grating of toe arbitrarily according to claim 1 is characterized in that: another diaphragm (2) near laser instrument in the light path is an adjustable diaphragm, and it has determined the length of the grating that will make.
3, the designed system of method for making of cutting the fiber grating of toe arbitrarily according to claim 1, it is characterized in that: when fiber grating is cut toe, it contains: the light-sensitive optical fibre of fixing, phase mask near fiber grating, accept laser pulse that ultraviolet source sends and perpendicular to the post lens of optical axis setting, fixing the rotation transfer table of diaphragm (1), the diaphragm (2) of decision grating length, and, controlling the microcomputer of above-mentioned rotation transfer table and laser instrument respectively through servo control mechanism and A/D transition card as the excimer laser of ultraviolet source; To the fiber grating traditional method of indicating the pronunciation of a Chinese character toe time, it includes fixing light-sensitive optical fibre, accept laser pulse that ultraviolet source sends and the post lens that are provided with perpendicular to optical axis, the rotation transfer table that is fixed with tagger along the optical axis setting, the diaphragm (2) of decision grating length and as the continuous excimer laser of ultraviolet source is being controlled the microcomputer of above-mentioned rotation transfer table and laser instrument respectively through servo control mechanism and A/D transition card.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB021460191A CN1195234C (en) | 2002-10-25 | 2002-10-25 | Method for preparing optical fiber grating with freely cutting any toe part as well as the system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB021460191A CN1195234C (en) | 2002-10-25 | 2002-10-25 | Method for preparing optical fiber grating with freely cutting any toe part as well as the system |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1415981A true CN1415981A (en) | 2003-05-07 |
CN1195234C CN1195234C (en) | 2005-03-30 |
Family
ID=4750991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB021460191A Expired - Fee Related CN1195234C (en) | 2002-10-25 | 2002-10-25 | Method for preparing optical fiber grating with freely cutting any toe part as well as the system |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN1195234C (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100371751C (en) * | 2006-03-03 | 2008-02-27 | 清华大学 | Method for producing non-linear chirp optical fibre grating for 40 Gb/S optical communication system |
CN102621609A (en) * | 2012-04-11 | 2012-08-01 | 中国科学院上海光学精密机械研究所 | Etching device and etching method for any apodised fiber bragg grating |
CN106249348A (en) * | 2016-09-13 | 2016-12-21 | 中国人民解放军国防科学技术大学 | A kind of apodization fiber grating inscribes system and method |
CN108051887A (en) * | 2017-12-27 | 2018-05-18 | 中央民族大学 | Apodization grating re-expose manufacturing system and method based on dynamic optical shield |
CN111856644A (en) * | 2020-07-28 | 2020-10-30 | 中国人民解放军国防科技大学 | Apodization long period optical fiber grating inscribing device, inscribing method and laser system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101625435B (en) * | 2008-07-09 | 2011-03-30 | 中国科学院半导体研究所 | Adjustable triangular conjugated amplitude mould plate and method for realizing apodizing of optical fiber grating |
-
2002
- 2002-10-25 CN CNB021460191A patent/CN1195234C/en not_active Expired - Fee Related
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100371751C (en) * | 2006-03-03 | 2008-02-27 | 清华大学 | Method for producing non-linear chirp optical fibre grating for 40 Gb/S optical communication system |
CN102621609A (en) * | 2012-04-11 | 2012-08-01 | 中国科学院上海光学精密机械研究所 | Etching device and etching method for any apodised fiber bragg grating |
CN102621609B (en) * | 2012-04-11 | 2014-05-07 | 中国科学院上海光学精密机械研究所 | Etching device and etching method for any apodised fiber bragg grating |
CN106249348A (en) * | 2016-09-13 | 2016-12-21 | 中国人民解放军国防科学技术大学 | A kind of apodization fiber grating inscribes system and method |
CN106249348B (en) * | 2016-09-13 | 2017-10-03 | 中国人民解放军国防科学技术大学 | A kind of apodization fiber grating carving and writing method |
CN108051887A (en) * | 2017-12-27 | 2018-05-18 | 中央民族大学 | Apodization grating re-expose manufacturing system and method based on dynamic optical shield |
CN108051887B (en) * | 2017-12-27 | 2024-04-09 | 中央民族大学 | Apodization grating secondary exposure manufacturing system and method based on dynamic optical shielding plate |
CN111856644A (en) * | 2020-07-28 | 2020-10-30 | 中国人民解放军国防科技大学 | Apodization long period optical fiber grating inscribing device, inscribing method and laser system |
CN111856644B (en) * | 2020-07-28 | 2023-10-03 | 中国人民解放军国防科技大学 | Apodized long-period fiber bragg grating inscription device, inscription method and laser system |
Also Published As
Publication number | Publication date |
---|---|
CN1195234C (en) | 2005-03-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN106249348B (en) | A kind of apodization fiber grating carving and writing method | |
CN101563212A (en) | Polymer object optical fabrication process | |
CN104765099B (en) | A kind of device and method for inscribing cycle adjustable optic fibre grating | |
US9488960B2 (en) | Methods and apparatuses for manufacturing ultralong fiber Bragg gratings with arbitrary reflection wavelength | |
Gandhi et al. | " On-axis" linear focused spot scanning microstereolithography system: optomechatronic Design, analysis and development | |
CN201654269U (en) | Making device of arbitrary chirp optical fiber grating | |
CN1195234C (en) | Method for preparing optical fiber grating with freely cutting any toe part as well as the system | |
CN104199144A (en) | Device and method for writing gratings on lithium niobate waveguides by aid of femtosecond laser device | |
CN116430514A (en) | Femtosecond laser direct-writing fiber grating preparation device and method | |
WO2006035739A1 (en) | Optical molding device and optical molding method | |
CN108983555A (en) | A kind of processing method that three-dimensional micro-nano structure is improved based on compound scan | |
CN101625435B (en) | Adjustable triangular conjugated amplitude mould plate and method for realizing apodizing of optical fiber grating | |
CN109387901A (en) | The laser writing device and method of the nano-precision pitch of long-period fiber grating | |
JP2001083337A (en) | Apodization method for optical writing bragg grating | |
JP2001225183A (en) | Optical device for laser beam machining | |
CN110421845A (en) | A kind of high-precision SLA laser 3D printing machine based on parallel mechanism structure | |
CN110007394B (en) | Method for preparing phase-shift fiber Bragg grating | |
CN2522092Y (en) | Laser variable-focus transmission lattice scanning unit | |
US7099537B2 (en) | System and method for fabricating Bragg gratings | |
CN1191480C (en) | Variable duty cycle sampling optical fiber grating and its apodization | |
CN1278069A (en) | Optical fiber grating mfg. method with chirp and apodization function adjustment | |
Limaye | Multi-objective process planning method for mask projection stereolithography | |
CN106483584A (en) | Manufacture the device of variable cycle photonic crystal based on multiple beam interferometry | |
CN1271431C (en) | Fibre-optical raster of implementing arbitrary target response | |
US11679533B2 (en) | Methods and apparatuses for casting optical polymer films |
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 | ||
C19 | Lapse of patent right due to non-payment of the annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |