CN101393301A - Conical coupling long-period optical fiber grating and method of manufacturing same - Google Patents

Conical coupling long-period optical fiber grating and method of manufacturing same Download PDF

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Publication number
CN101393301A
CN101393301A CNA2008102262944A CN200810226294A CN101393301A CN 101393301 A CN101393301 A CN 101393301A CN A2008102262944 A CNA2008102262944 A CN A2008102262944A CN 200810226294 A CN200810226294 A CN 200810226294A CN 101393301 A CN101393301 A CN 101393301A
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China
Prior art keywords
optical fiber
period
shaped grooves
clamping
conical coupling
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CNA2008102262944A
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Chinese (zh)
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宁提纲
裴丽
朱翀宇
戴毅
李晶
胡旭东
王春灿
张帆
郑晶晶
冯素春
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Beijing Jiaotong University
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Beijing Jiaotong University
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Abstract

The invention relates to a tapered coupled long-period fiber grating and a manufacturing method thereof, which are suitable for the fields of optical fiber communication, sensing, microwave photon and so on. The method comprises the following steps: one end of an optical fiber (7) is fixed on a mobile device (1) and the other end of the optical fiber (7) is fixed on a heavy object (6) through a dead pulley (5); the optical fiber is supported into a left optical fiber clamping V-shaped groove (21) and a right optical fiber clamping V-shaped groove (22); after the optical fiber is in the straightening state by the heavy object, the optical fiber is clamped into the left and right optical fiber clamping V-shaped grooves; a coating of the optical fiber between the optical fiber clamping V-shaped grooves is stripped; the coating stripping position is heated to the fusion temperature by an upper heating device (31) and a lower heating device (32); the left optical fiber clamping V-shaped groove is driven by a mobile platform (4) to taper the optical fiber; after the process is completed, the mobile device drives the optical fiber to move for a period; and the taper step is repeated, so as to realize taper for a plurality of times, and the tapered coupled long-period fiber grating is manufactured. The tapered coupled long-period fiber grating consists of periodical tapered coupled areas.

Description

Conical coupling long-period optical fiber grating and preparation method thereof
Technical field
The present invention relates to conical coupling long-period optical fiber grating and preparation method thereof, be applicable to fields such as optical fiber communication, Fibre Optical Sensor, Traffic Information Engineering ﹠ Control technology, microwave photon (RoF:Radio over Fiber), fiber laser.
Background technology
The cycle of Fiber Bragg Grating FBG is a nanometer scale, is widely used in the fields such as optical fiber communication, Fibre Optical Sensor, Traffic Information Engineering ﹠ Control technology, microwave photon (RoF:Radio over Fiber), fiber laser.If the cycle of grating reaches more than tens of microns, be referred to as long period fiber grating.Long-period gratings falls the cladding loss that couples light to of certain frequency band of transmitting in the optical fiber, rather than as Fiber Bragg Grating FBG light is reflected back, thereby long-period gratings can as the flat gain device of EDFA, wavelength selectivity coupling mechanism and on/the drop Voice Channel device.Because the long-period gratings cycle is big, the change of stress and temperature will cause the strain of grating, and the wavelength that is coupled in the covering has greatly changed.Therefore long-period gratings also can be used for sensings such as fiber stress, temperature and gas, utilizes the non-linear of long-period gratings can construct full light signal processing logic door; Utilize the chromatic dispersion of long-period gratings in transmission bandwidth, can carry out the through mode dispersion compensation communication line.The widespread use of long-period gratings has promoted the development that long-period gratings writes technology.The period ratio Fiber Bragg Grating FBG of long-period gratings big a lot, generally more than hundred microns, thereby long-period gratings write easilier than Bragg grating, what adopt the earliest is the intensity mask means, has developed as CO again now 2The little curved method of laser and arc heated, microlens array method, ion are carved rotten method, and mechanical indentation method etc.
Existing intensity mask means, CO 2Laser microlens array method, these methods are the refractive index effects to optical fiber, form periodically to change; The perhaps little curved method of arc heated, mechanical indentation method are realized by little curved Mode Coupling, littlely curvedly are difficult to control and keep; Ion etching method, the cost of etching is very high, and can only etch away covering, etching covering and fibre core that can not be in proportion.These make the method for long period fiber grating, and the physical dimension of optical fiber or the physical dimension of fibre core do not change, and have no idea to improve from structure to strengthen the long period fiber grating perception of environment to external world; In addition, obtain stronger coupling effect, need long coupling regime, make that the vertical scale of long period fiber grating is bigger, be unfavorable for using.
Because the deficiency that above-mentioned long period fiber grating is used and made has proposed a kind of conical coupling long-period optical fiber grating and preparation method thereof to invention.
Summary of the invention
Technical matters to be solved by this invention is to overcome existing long period fiber grating cost height, the perception of environment is low to external world, coupling effect is low deficiency, expand the kind of long period fiber grating, a kind of conical coupling long-period optical fiber grating and preparation method thereof is provided.
Technical scheme of the present invention:
A kind of conical coupling long-period optical fiber grating method for making, the concrete steps of this method for making:
Step 1, an end of optical fiber is fixed on the mobile device, and the other end is fixed on the weight through fixed pulley;
A left side optical fiber clamping V-shaped grooves or/and right optical fiber clamping V-shaped grooves be fixed on the mobile platform;
In the left optical fiber clamping V-shaped grooves and right optical fiber clamping V-shaped grooves of fiber support between mobile device and fixed pulley, divest the coat of the optical fiber between left optical fiber clamping V-shaped grooves and the right optical fiber clamping V-shaped grooves;
Under the effect of weight, optical fiber keep straight after, about fibre clip is held in two optical fiber clamping V-shaped grooves;
Step 2 places optical fiber coating to be divested the high order end or the low order end at position last heating arrangement and following heating arrangement;
Step 3, heating arrangement and following heating arrangement are heated to melt temperature to optical fiber in the startup;
Step 4 makes mobile platform drive left optical fiber clamping V-shaped grooves or right optical fiber clamping V-shaped grooves is drawn awl to optical fiber, draw awl to finish after, use mobile device or be moved to the left the one-period of long period fiber grating to the right optical fiber, finish being pulled through journey for the first time; Repeat 3～3000 times and draw the awl process, produce periodic conical coupling long-period optical fiber grating.
Conical coupling long-period optical fiber grating is made up of periodic taper coupling.
In the step 4 optical fiber is drawn awl, draw awl to finish after, or use to go up heating arrangement and the following heating arrangement one-period of mobile conical coupling long-period optical fiber grating to the left or to the right, finish and being pulled through journey the first time; Repeat 3～3000 times and draw the awl process, produce periodic conical coupling long-period optical fiber grating.
Beneficial effect of the present invention: drawing awl is that pointwise is implemented, and can conveniently control the conical coupling long-period optical fiber grating of making; Draw the regional covering of awl, fibre core to reduce in proportion, Mode Coupling is stronger, and short coupling regime can be realized stronger coupling efficiency; After drawing awl, the optical fiber core diameter attenuates, and parameter to external world changes responsive more, is used for sensor-based system and has better characteristic.The optical fiber of making conical coupling long-period optical fiber grating is not had the photosensitivity requirement, make the optical fiber of all size and material can produce conical coupling long-period optical fiber grating.
Description of drawings
Fig. 1 mobile platform is in the conical coupling long-period optical fiber grating in left side and preparation method thereof synoptic diagram.
Fig. 2 mobile platform is in the conical coupling long-period optical fiber grating on right side and preparation method thereof synoptic diagram.
Fig. 3 has the conical coupling long-period optical fiber grating of bilateral mobile platform and preparation method thereof synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Embodiment one
Present embodiment further specifies in conjunction with Fig. 1;
A kind of step of conical coupling long-period optical fiber grating method for making:
Step 1, an end of general single mode fiber 7 is fixed on the mobile device 1, and the other end is fixed on the weight 6 through fixed pulley 5;
Left side optical fiber clamping V-shaped grooves 21 is fixed on the mobile platform 4;
General single mode fiber 7 is supported in the left optical fiber clamping V-shaped grooves 21 and right optical fiber clamping V-shaped grooves 22 between mobile device 1 and the fixed pulley 5, divests general single mode fiber 7 coats between the optical fiber clamping V-shaped grooves of the left and right sides, and length is 30mm; Weight 6 is 3 grams, under the effect of weight 6, after general single mode fiber 7 maintenances are straight, general single mode fiber 7 is clamped in the optical fiber clamping V-shaped grooves of the left and right sides again;
Step 2 places general single mode fiber 7 coats to be divested the high order end at position in arc heated device 31 and arc heated device 32;
Step 3 starts arc heated device 31 and 32 pairs of general single mode fibers 7 of arc heated device and is heated to melt temperature;
Step 4, mobile platform 4 moves 0.1mm, drives 21 pairs of general single mode fibers 7 of optical fiber clamping V-shaped grooves and draws awl, draw awl to finish after, use mobile device 1 that general single mode fiber is moved to the left conical coupling long-period optical fiber grating one-period 0.5mm, finish first and draw the awl step.Repeat 5 times and draw the awl process, producing one-period is the conical coupling long-period optical fiber grating of 5 tapers variation of 0.5mm.
Embodiment two
Present embodiment further specifies in conjunction with Fig. 1:
A kind of step of conical coupling long-period optical fiber grating method for making:
Step 1, an end of Active Optical Fiber 7 is fixed on the mobile device 1, and the other end is fixed on the weight 6 through fixed pulley 5;
Left side optical fiber clamping V-shaped grooves 21 is fixed on the mobile platform 4;
Active Optical Fiber 7 is supported on the optical fiber clamping V-shaped grooves 21 and optical fiber clamping V-shaped grooves 22 between mobile device 1 and the fixed pulley 5, and Active Optical Fiber 7 coats are therebetween divested, and length is 100mm; Weight 6 is 5 grams, and under the effect of weight 6, Active Optical Fiber 7 keeps straight; Active Optical Fiber 7 is clamped in the optical fiber clamping V-shaped grooves of the left and right sides;
Step 2 places coat to divest the high order end at position laser heating device 31 and laser heating device 32;
Step 3 starts laser heating device 31 and 32 pairs of common Active Optical Fibers 7 of laser heating device and is heated to melt temperature;
Step 4, mobile platform 4 moves 0.08mm, drives 21 pairs of Active Optical Fibers 7 of optical fiber clamping V-shaped grooves and draws awl, draw awl to finish after, use mobile device 1 that Active Optical Fiber is moved to the left conical coupling long-period optical fiber grating one-period 0.5mm, finish first and draw the awl step.Repeat 5 times and draw the awl process, draw awl at every turn after, mobile device 1 increases 0.01mm to the distance that Active Optical Fiber is moved to the left, the conical coupling long-period optical fiber grating that 5 tapers of variable period that to produce an initial period be 0.5mm change.
Embodiment three
Present embodiment further specifies in conjunction with Fig. 2;
A kind of step of conical coupling long-period optical fiber grating method for making:
Step 1, an end of photonic crystal fiber 7 is fixed on the mobile device 1, and the other end is fixed on the weight 6 through fixed pulley 5; Photonic crystal fiber 7 is supported on the optical fiber clamping V-shaped grooves 21 and optical fiber clamping V-shaped grooves 22 between mobile device 1 and the fixed pulley 5, and photonic crystal fiber 7 coats are therebetween divested, and length is 500mm; Weight 6 is 8 grams, and under the effect of weight 6, photonic crystal fiber 7 keeps straight; Photonic crystal fiber 7 is clamped between two optical fiber clamping V-shaped grooves;
Right optical fiber clamping V-shaped grooves 22 is fixed on the mobile platform 4;
Step 2 places coat to divest the low order end at position oxyhydrogen flame heating arrangement 31 and oxyhydrogen flame heating arrangement 32;
Step 3 starts oxyhydrogen flame heating arrangement 31 and 32 pairs of photonic crystal fibers 7 of oxyhydrogen flame heating arrangement and is heated to melt temperature;
Step 4, mobile platform 4 moves 0.05mm, drives 21 pairs of photonic crystal fibers 7 of optical fiber clamping V-shaped grooves and draws awl, draw awl to finish after, use oxyhydrogen flame heating arrangement 31 and oxyhydrogen flame heating arrangement 32 to be moved to the left conical coupling long-period optical fiber grating one-period 1mm, finish first and draw the awl step.Repeat 100 times and draw the awl process, producing cycle beginning is the conical coupling long-period optical fiber grating that 100 tapers of 1mm change.
Embodiment four
Present embodiment further specifies in conjunction with Fig. 3;
A kind of step of conical coupling long-period optical fiber grating method for making:
Step 1, an end of polarization maintaining optical fibre 7 is fixed on the mobile device 1, and the other end is fixed on the weight 6 through fixed pulley 5; Polarization maintaining optical fibre 7 is supported on the optical fiber clamping V-shaped grooves 21 and optical fiber clamping V-shaped grooves 22 between mobile device 1 and the fixed pulley 5, and polarization maintaining optical fibre 7 coats are divested, and length is 10000mm; Weight 6 is 10 grams, and under the effect of weight 6, polarization maintaining optical fibre 7 keeps straight; Polarization maintaining optical fibre 7 is clamped between two optical fiber clamping V-shaped grooves;
Left side optical fiber clamping V-shaped grooves 21 is fixed on the mobile platform 4; Right optical fiber clamping V-shaped grooves 22 is fixed on the mobile platform 41;
Step 2 places coat to divest the low order end at position in arc heated device 31 and arc heated device 32;
Step 3,32 pairs of polarization maintaining optical fibres 7 of resistance wire heating arrangement 31 and resistance wire heating arrangement are heated to melt temperature;
Step 4, mobile platform 4 moves 0.18mm, drives 21 pairs of polarization maintaining optical fibres 7 of optical fiber clamping V-shaped grooves and draws awl, draw awl to finish after, use mobile device 1 the polarization maintaining optical fibre 7 conical coupling long-period optical fiber grating one-period 5mm that moves right, finish first and draw the awl step.Repeat 2000 times and draw the awl process, producing cycle beginning is the conical coupling long-period optical fiber grating that 2000 tapers of 5mm change.
Embodiment five
Present embodiment further specifies in conjunction with Fig. 3;
A kind of step of conical coupling long-period optical fiber grating method for making:
Step 1, an end of the optical fiber 7 of any materials and specification is fixed on the mobile device 1, and the other end is fixed on the weight 6 through fixed pulley 5; The optical fiber 7 of any materials and specification is supported on the optical fiber clamping V-shaped grooves 21 and optical fiber clamping V-shaped grooves 22 between mobile device 1 and the fixed pulley 5, and optical fiber 7 coats of any materials and specification are divested, and length is 50-12000mm; Weight 6 is for the 3-12 gram, and under the effect of weight 6, the optical fiber 7 of any materials and specification keeps straight; The optical fiber 7 of any materials and specification is clamped between two optical fiber clamping V-shaped grooves;
Left side optical fiber clamping V-shaped grooves 21 is fixed on the mobile platform 4 or/and right optical fiber clamping V-shaped grooves 22 is fixed on the mobile platform 41;
Step 2 places coat to divest the low order end at position heating arrangement 31 and heating arrangement 32; Heating arrangement can be oxyhydrogen flame or electric arc or resistance wire or laser heating device;
Step 3, the optical fiber 7 of 32 pairs of any materials of heating arrangement 31 and heating arrangement and specification is heated to melt temperature;
Step 4, mobile platform 4 moves 0.01-0.2mm, the optical fiber 7 that drives 21 pairs of any materials of optical fiber clamping V-shaped grooves and specification draws awl, after drawing awl to finish, use mobile device 1 the optical fiber 7 of protecting any materials and the specification conical coupling long-period optical fiber grating one-period 0.2-6mm that moves right, finish first and draw the awl step.Repeat 3-3000 time and draw the awl process, produce a repeatedly conical coupling long-period optical fiber grating of taper variation.

Claims (3)

1. a conical coupling long-period optical fiber grating method for making is characterized in that, the concrete steps of this method for making:
Step 1, an end of optical fiber (7) are fixed on the mobile device (1), and the other end is fixed on the weight (6) through fixed pulley (5);
Left side optical fiber clamping V-shaped grooves (21) or right optical fiber clamping V-shaped grooves (22) are fixed on mobile platform (4);
Optical fiber (7) is supported in the left optical fiber clamping V-shaped grooves (21) and right optical fiber clamping V-shaped grooves (22) between mobile device (1) and the fixed pulley (5), divests the coat of the optical fiber (7) between left optical fiber clamping V-shaped grooves (21) and the right optical fiber clamping V-shaped grooves (22);
Under the effect of weight (6), optical fiber (7) keep straight after, about optical fiber (7) is clamped in two optical fiber clamping V-shaped grooves;
Step 2 will go up heating arrangement (31) and following heating arrangement (32) and place optical fiber (7) coat to be divested the high order end or the low order end at position;
Step 3, heating arrangement in the startup (31) and following heating arrangement (32) are heated to melt temperature to optical fiber (7);
Step 4, make mobile platform (4) drive left optical fiber clamping V-shaped grooves (21) or right optical fiber clamping V-shaped grooves (22), optical fiber (7) is drawn awl, after drawing awl to finish, use mobile device (1) or be moved to the left the one-period of conical coupling long-period optical fiber grating to the right, finish being pulled through journey for the first time optical fiber; Repeat 3～3000 times and draw the awl process, produce periodic conical coupling long-period optical fiber grating.
2. a kind of conical coupling long-period optical fiber grating method for making according to claim 1, it is characterized in that: in the step 4 optical fiber (7) is drawn awl, after drawing awl to finish, heating arrangement in the use (31) and following heating arrangement (32) be the one-period of mobile conical coupling long-period optical fiber grating to the left or to the right, finishes to be pulled through journey for the first time; Repeat 3～3000 times and draw the awl process, produce periodic conical coupling long-period optical fiber grating.
3. conical coupling long-period optical fiber grating is characterized in that: conical coupling long-period optical fiber grating is made up of periodic taper coupling.
CNA2008102262944A 2008-11-12 2008-11-12 Conical coupling long-period optical fiber grating and method of manufacturing same Pending CN101393301A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103439262A (en) * 2013-07-16 2013-12-11 深圳大学 Volatile organic compound detection device based on optical fiber evanescent field and manufacturing method thereof
CN104834055A (en) * 2015-05-04 2015-08-12 深圳大学 Device for preparing long period fiber grating based on arc discharge
CN105445224A (en) * 2014-06-06 2016-03-30 纳米及先进材料研发院有限公司 Reusable long period microfiber grating for detection of dna hybridization
CN105739011A (en) * 2016-05-09 2016-07-06 天津理工大学 Molybdenum disulfide long-period fiber grating and preparation method thereof
CN106959487A (en) * 2017-05-16 2017-07-18 华中科技大学 The Active Optical Fiber long-period gratings suppressed for stimulated Raman scattering and its making
CN107917722A (en) * 2017-10-16 2018-04-17 天津理工大学 A kind of fiber reflection formula probe sensor and its manufacture method based on the interference of covering super model
CN110146190A (en) * 2019-05-20 2019-08-20 南京邮电大学 A kind of sensing system and grating design method of symmetric double cone optical-fiber grating
CN111856645A (en) * 2020-07-28 2020-10-30 中国人民解放军国防科技大学 Fused-cone type long-period fiber grating, preparation device, preparation method and laser system
CN114427905A (en) * 2022-01-13 2022-05-03 深圳技术大学 Manufacturing method of optical fiber vibration sensor

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103439262A (en) * 2013-07-16 2013-12-11 深圳大学 Volatile organic compound detection device based on optical fiber evanescent field and manufacturing method thereof
CN105445224A (en) * 2014-06-06 2016-03-30 纳米及先进材料研发院有限公司 Reusable long period microfiber grating for detection of dna hybridization
CN104834055A (en) * 2015-05-04 2015-08-12 深圳大学 Device for preparing long period fiber grating based on arc discharge
CN105739011A (en) * 2016-05-09 2016-07-06 天津理工大学 Molybdenum disulfide long-period fiber grating and preparation method thereof
CN105739011B (en) * 2016-05-09 2019-01-08 天津理工大学 A kind of molybdenum disulfide long-period fiber grating and preparation method thereof
CN106959487A (en) * 2017-05-16 2017-07-18 华中科技大学 The Active Optical Fiber long-period gratings suppressed for stimulated Raman scattering and its making
CN106959487B (en) * 2017-05-16 2019-04-26 华中科技大学 The Active Optical Fiber long-period gratings inhibited for stimulated Raman scattering and its production
CN107917722A (en) * 2017-10-16 2018-04-17 天津理工大学 A kind of fiber reflection formula probe sensor and its manufacture method based on the interference of covering super model
CN110146190A (en) * 2019-05-20 2019-08-20 南京邮电大学 A kind of sensing system and grating design method of symmetric double cone optical-fiber grating
CN111856645A (en) * 2020-07-28 2020-10-30 中国人民解放军国防科技大学 Fused-cone type long-period fiber grating, preparation device, preparation method and laser system
CN111856645B (en) * 2020-07-28 2023-09-19 中国人民解放军国防科技大学 Fused taper type long-period fiber grating, preparation device, preparation method and laser system
CN114427905A (en) * 2022-01-13 2022-05-03 深圳技术大学 Manufacturing method of optical fiber vibration sensor

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