CN201654269U - Making device of arbitrary chirp optical fiber grating - Google Patents
Making device of arbitrary chirp optical fiber grating Download PDFInfo
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- CN201654269U CN201654269U CN2010201554844U CN201020155484U CN201654269U CN 201654269 U CN201654269 U CN 201654269U CN 2010201554844 U CN2010201554844 U CN 2010201554844U CN 201020155484 U CN201020155484 U CN 201020155484U CN 201654269 U CN201654269 U CN 201654269U
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Abstract
The utility model relates to a making device of an arbitrary chirp optical fiber grating, which belongs to the technical field of optical fiber grating manufacture devices. The device comprises a laser, a reflecting mirror, a cylindrical surface lens, a mask plate and a computer, wherein the reflecting mirror (22) and the cylindrical surface lens (24) are sequentially fixed on a scanning moving platform (23) from top to bottom, the laser (21) is arranged on one side corresponding to the mirror surface of the reflecting mirror, the mirror surface of the reflecting mirror is in inclined arrangement at 45 degrees at the front part and the back part in the laser advancing direction horizontally emitted by the laser device, the mask plate (25) and an optical fiber moving platform (27) are arranged under the scanning moving platform, and the scanning moving platform and the optical fiber moving platform are connected with the computer through a serial port. Through programmed software, the utility model can change the moving state of the scanning moving platform, and can precisely control the speed change so that the optical fiber can be stretched according to a set function, the grating making device is simple, economic and practical, and can be easily realized, and the utility model has good repetitiveness and flexibility.
Description
Technical field
The utility model relates to a kind of chiseling apparatus of any chirped fiber grating, exactly is the uniform phase mask plate of a kind of employing, makes the chiseling apparatus of any chirped fiber grating by the stretching of control optical fiber.
Background technology
Fiber grating came out oneself nearly 30 years, and the manufacturing technology of fiber grating has also experienced several times and changed.1978, Canadian K.O.Hill and colleague thereof observed ne ion laser and transmit in opposite directions in optical fiber when forming standing wave in experiment, form the grating that refractive index cycle distributes in optical fiber, i.e. wrting method in the fiber grating.1989, people such as G.Meltz have invented the ultraviolet sidelights on and have gone into technology, the ultraviolet light that they utilize two beam interferometers has write grating from the side of optical fiber, it is holographic wrting method, this technology has not only improved the efficient that writes of grating greatly, thereby and can reach the purpose of controlling bragg wavelength by the angle that changes two bundle coherent lights.1993, people such as K.O.Hill have proposed the phase mask method and have write technology (Phase mask), the interference fringe that taxi 1 order diffraction light forms after utilizing Ultra-Violet Laser through the phase mask diffraction is to exposed optical fiber, the proposition of this technology has greatly been relaxed writing light source coherence's requirement, make the making of fiber grating be more prone to, and make the batch process of fiber grating become possibility.Thereafter the researchist has proposed point-to-point writing method (Point by point) and scanning wrting method etc. in succession.
Along with the fiber grating ultraviolet writes technology rapid development, utilize the chirp grating research that chromatic dispersion compensates to conventional fiber to obtain significant progress, there has been several different methods to be used to produce chirped fiber grating up to now.People such as Hill adopt and make the double exposure of the optical cycle of grating along grating length direction generation gradual change, with waiting cycle light distribution to make chirped fiber grating.People such as people such as Sugden and Zhang have made chirp grating by the method that fibre-optical bending is placed on optical fiber.People such as people such as Byron, Dong and Putnam etc. adopt the hydrofluorite corrosion to make optical fiber external diameter generation gradual change the cycle grating such as write then thereon per capita, by in ablation process or write the back method of stress application on optical fiber that finishes and made chirped fiber grating.In addition, people such as people such as Hill and Taverner has produced chirp by the method to uniform grating stress application or thermograde in uniform grating.People such as Farriers make the interference angle of two-beam make chirp grating along fiber axis to variation continuously takes place on optical fiber by add cylindrical mirror in the double-beam holographic light path system.People such as Eggleton then utilize the Gaussian intensity profile of ultraviolet hot spot to make chirped fiber grating with the prism interferometric method, and people such as Kashyap adopt the segmentation of being made by the electron beam exposure figure generation technique zero level of warbling to suppress phase mask plate made the segmentation chirp grating on optical fiber.
The holographic wrting method of chirp grating has been broken through other method for making to writing the restriction of wavelength, can change the wavelength that writes of grating flexibly, but it has relatively high expectations to the coherence and the space environment of light source, also difficulty relatively in the adjustment.Point-to-point writing method does not need template, and it makes light beam move axially along optical fiber, control the break-make and the Strength Changes of light simultaneously, but it is high to the accuracy requirement of mechanical hook-up, realizes that difficulty is big.The method of phase mask plate, simplified the manufacture difficulty of grating, improved make efficiency, coherence and experimental provision stability requirement to light source are not high, but the price of the mask plate of warbling is high, and make the centre wavelength of grating and the restriction that chirp coefficient all is subjected to mask plate, can not satisfy its application on the division multiplex fibre-optic communication wave field far away.
Summary of the invention
The purpose of this utility model be to provide a kind of simple in structure, economical and practical, be easy to realize to have the chiseling apparatus of any chirped fiber grating of good reproducibility and dirigibility.
Its technical scheme is: a kind of chiseling apparatus of any chirped fiber grating, comprise laser instrument, catoptron, cylindrical lens, mask plate and computer, it is characterized in that: described catoptron and cylindrical lens are fixed on the scanning mobile platform from top to bottom successively, laser instrument is arranged on a side of mirror mirror correspondence, and mirror mirror is obliquely installed according to being 45 degree before and after the laser level emitted laser direct of travel; The below of scanning mobile platform is provided with mask plate and optical fiber mobile platform, and the scanning mobile platform is connected with computer by serial ports with the optical fiber mobile platform.
The principle that the utility model adopts is as follows:
The cycle of chirped fiber grating is not constant but monotone variation vertically, because the corresponding different reflection wavelength of different grid cycle, chirp grating can form the very wide zone of reflections.Chirp grating has an aperiodic grating space, and the pass of its reflection wavelength and grid is:
λ
B(z)＝2n
eff(z)Λ(z)
In the formula, n
Eff(z) be the grating effective refractive index, Λ (z) is the grating cycle along length variations, but its distribution approximate representation is (as Fig. 1):
In the formula, Q ' (z) characterizes the constant of grating chirp degree, is called the chirp parameter.When fiber grating was subjected to axial stress, its wavelength shift was determined by following formula:
P wherein
eBe photoelastic effect, generally get 0.22, then have:
Q(z)＝(1-P
e)ε(z)＝0.78ε(z)
And ε (z) can be stretched to optical fiber by the motion of software control displacement platform 27 and realize, when ε (z) was constant, Q ' was a constant zero (z), and the grating of scribing is bragg grating; When ε (z) was linear function, Q ' was a constant (z), and the grating of scribing is the linear chrip grating, its chirp coefficient be 0.78 ε ' (z); When ε (z) was any mathematical function, the chirp coefficient of the chirp grating of then scribing and this function kept certain mathematical relation.For obtaining the chirped fiber grating of required abbe number, can control flexibly ε (z) and grating length etc. by software and realize.Therefore, use this technology can realize dispersion management more like a cork at optical communication field.
The optical fiber yield strength that does not write grating can reach 6GPa, when optical fiber through phase mask plate in strong UV-irradiation following time, the mechanical tensile strength of optical fiber descends to some extent, about 700MPa, the about 72GPa of the Young modulus E of bare fibre, this maximum tension dependent variable that shows that grating can bear is about 1%, and for the grating of 1550nm wave band, tuning amount is 12nm approximately.
Its technique effect is: the utility model is by the software of establishment, can change the motion state of scanning mobile platform, accurately control rate changes, makes it according to the function of setting optical fiber to be stretched, make that the device of scribing grating is simple, economical and practical, be easy to realize having good repeatability and dirigibility.
Its biggest advantage is:
1) a kind of straightforward procedure of being made chirped fiber grating by even mask plate is proposed;
2) by the speed and the grating length of control stretching, can make the very big chirp grating of abbe number.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
As shown in Figure 1: the chiseling apparatus of any chirped fiber grating comprises laser instrument, catoptron, cylindrical lens, mask plate and computer.Catoptron 22 adopts plane mirror, has the function of scanner uni folded light beam.Mask plate 25 adopts Prague phase mask plate, and catoptron and cylindrical lens 24 are fixed on the scanning mobile platform 23 from top to bottom successively, and laser instrument 21 is arranged on a side of mirror mirror correspondence.Laser instrument is continuous 244nm frequency multiplication Argon ion laser, is produced by the relevant company of the U.S..Mirror mirror is obliquely installed according to being 45 degree before and after the laser level emitted laser direct of travel, horizontal emitted laser is reflexed on the cylindrical lens according to 90 degree, cylindrical lens vertically compresses laser beam, focus on, the hot spot vertical irradiation after the focusing is on Prague phase mask plate 25.The below of scanning mobile platform is provided with optical fiber mobile platform 27, and the scanning mobile platform is connected with the computer (not shown) by serial ports with the optical fiber mobile platform.
The engrating process of any chirped fiber grating:
1) optical fiber 26 is fixed on the optical fiber mobile platform 27;
2) catoptron reflexes to the laser that laser level launches on the cylindrical lens according to 90 degree, and cylindrical lens vertically compresses laser beam, is focused into a bit, and focus is near fiber core; Hot spot vertical irradiation after the focusing by scholar's 1 order diffraction interference of light, focuses on the optical fiber core diameter hot spot on Prague phase mask plate 25;
3) by the software that is arranged in the computer direction of motion, speed and the scope of scanning mobile platform are controlled, make hot spot according to the function of setting along the optical fiber axial scan;
4) by being arranged on the motion state of the software control optical fiber mobile platform in the computer, according to the function of setting optical fiber is stretched, by the real-time control of software to optical fiber tensile number mathematic(al) function, in elastic range, pass through the contraction of optical fiber self, obtain warbling of longitudinal refractive index and scribe, promptly get required any chirped fiber grating.
Scribe in the process at grating, can monitor in real time the transmission spectrum and the reflectance spectrum of fiber grating, to obtain any chirped fiber grating of desired properties by the grating performance testing device.The grating performance testing device is made of light source 28, circulator 29 and spectroanalysis instrument 30, and a termination of optical fiber is gone into spectroanalysis instrument, and the other end inserts circulator 29, and the other end of circulator inserts light source 28, and its output terminal inserts spectroanalysis instrument.
The chirped fiber grating that adopts said method to make shows good performance.As shown in Figure 2, X-axis is wavelength (nm), and Y-axis is light intensity (dB), centre wavelength 1549.28nm, and reflection bandwidth 12.74nm, grating length 30mm can be applicable in the dispersion compensation in the fiber optic communication field.
Claims (3)
1. the chiseling apparatus of any chirped fiber grating, comprise laser instrument, catoptron, cylindrical lens, mask plate and computer, it is characterized in that: described catoptron (22) and cylindrical lens (24) are fixed on the scanning mobile platform (23) from top to bottom successively, laser instrument (21) is arranged on a side of mirror mirror correspondence, and mirror mirror is obliquely installed according to being 45 degree before and after the laser level emitted laser direct of travel; The below of scanning mobile platform is provided with mask plate (25) and optical fiber mobile platform (27), and the scanning mobile platform is connected with computer by serial ports with the optical fiber mobile platform.
2. the producing device of any chirped fiber grating according to claim 1, it is characterized in that: described mask plate (25) is Prague phase mask plate.
3. the producing device of any chirped fiber grating according to claim 1, it is characterized in that: described laser instrument (21) is continuous 244nm frequency multiplication Argon ion laser.
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| CN2010201554844U CN201654269U (en) | 2010-04-09 | 2010-04-09 | Making device of arbitrary chirp optical fiber grating |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436026A (en) * | 2012-01-11 | 2012-05-02 | 西安盛佳光电有限公司 | Method for simultaneously manufacturing multiple optical fiber gratings |
| CN106706001A (en) * | 2017-01-05 | 2017-05-24 | 俞婷 | Positioning and detection method for central point of optical distance of polarization-maintaining optical fiber ring |
| CN106772782A (en) * | 2017-01-19 | 2017-05-31 | 华中科技大学 | A kind of continuous Written Device of multifunctional optical fiber micro-structural and method |
| CN106842415A (en) * | 2017-03-20 | 2017-06-13 | 武汉光谷航天三江激光产业技术研究院有限公司 | A kind of method for making chirped fiber grating, device and optical fiber laser |
| CN107807443A (en) * | 2016-09-08 | 2018-03-16 | 南京理工大学 | The device and its method of adjustment of adjust automatically ultraviolet laser beams position |
| CN109799574A (en) * | 2019-03-01 | 2019-05-24 | 南京聚科光电技术有限公司 | A kind of the fiber grating preparation facilities and its method of random pattern |
| CN112799160A (en) * | 2021-01-28 | 2021-05-14 | 中国科学院上海光学精密机械研究所 | Photo-induced thermal deformation glass-based chirp rate-adjustable chirp volume grating exposure device and preparation method of chirp volume grating |
| CN114325927A (en) * | 2021-12-06 | 2022-04-12 | 苏州英谷激光有限公司 | Apodization inscription system for inscription of large mode field chirp optical fiber grating |
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2010
- 2010-04-09 CN CN2010201554844U patent/CN201654269U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436026A (en) * | 2012-01-11 | 2012-05-02 | 西安盛佳光电有限公司 | Method for simultaneously manufacturing multiple optical fiber gratings |
| CN107807443A (en) * | 2016-09-08 | 2018-03-16 | 南京理工大学 | The device and its method of adjustment of adjust automatically ultraviolet laser beams position |
| CN106706001A (en) * | 2017-01-05 | 2017-05-24 | 俞婷 | Positioning and detection method for central point of optical distance of polarization-maintaining optical fiber ring |
| CN106706001B (en) * | 2017-01-05 | 2019-10-25 | 华兴新锐通信科技集团有限公司 | A kind of positioning and detection method of polarization-maintaining fiber coil light path central point |
| CN106772782A (en) * | 2017-01-19 | 2017-05-31 | 华中科技大学 | A kind of continuous Written Device of multifunctional optical fiber micro-structural and method |
| CN106772782B (en) * | 2017-01-19 | 2017-10-31 | 华中科技大学 | A kind of continuous Written Device of multifunctional optical fiber micro-structural and method |
| CN106842415B (en) * | 2017-03-20 | 2019-02-12 | 武汉光谷航天三江激光产业技术研究院有限公司 | A kind of method, apparatus making chirped fiber grating and optical fiber laser |
| CN106842415A (en) * | 2017-03-20 | 2017-06-13 | 武汉光谷航天三江激光产业技术研究院有限公司 | A kind of method for making chirped fiber grating, device and optical fiber laser |
| CN109799574A (en) * | 2019-03-01 | 2019-05-24 | 南京聚科光电技术有限公司 | A kind of the fiber grating preparation facilities and its method of random pattern |
| CN109799574B (en) * | 2019-03-01 | 2020-12-01 | 南京聚科光电技术有限公司 | Optical fiber grating preparation device with any pattern and method thereof |
| CN112799160A (en) * | 2021-01-28 | 2021-05-14 | 中国科学院上海光学精密机械研究所 | Photo-induced thermal deformation glass-based chirp rate-adjustable chirp volume grating exposure device and preparation method of chirp volume grating |
| CN112799160B (en) * | 2021-01-28 | 2022-05-31 | 中国科学院上海光学精密机械研究所 | Photo-induced thermal deformation glass-based chirp rate-adjustable chirp volume grating exposure device and preparation method of chirp volume grating |
| CN114325927A (en) * | 2021-12-06 | 2022-04-12 | 苏州英谷激光有限公司 | Apodization inscription system for inscription of large mode field chirp optical fiber grating |
| CN114325927B (en) * | 2021-12-06 | 2023-12-12 | 苏州英谷激光有限公司 | Apodization inscription system for inscribing large-mode-field chirped fiber grating |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Anhui Minsheng Information Engineering Co., Ltd. Assignor: Hefei Zhengyang Photoelectric Technology Co.,Ltd. Contract record no.: 2010340000175 Denomination of utility model: Making device of arbitrary chirp optical fiber grating Granted publication date: 20101124 License type: Exclusive License Record date: 20100903 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20120409 |