CN101285908B - Manufacture method of all-optical fiber heavy pressure gas chamber based on hollow photon crystal optical fibre - Google Patents
Manufacture method of all-optical fiber heavy pressure gas chamber based on hollow photon crystal optical fibre Download PDFInfo
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Abstract
The production method of the invention discloses a kind of all -fiber heavy pressure gas chamber based on hollow-core photonic crystal fiber. Step is a) to be connected at hollow-core photonic crystal fiber (1) both ends with airtight A chamber (2), airtight B chamber (3), and distribution platform (4) one end is connect with vacuum pump (5), to inflatable body source (6) respectively with airtight B chamber (3), the other end; B) airtight B chamber (3) is first connected through distribution platform (4) and vacuum pump (5), after vacuum degree needed for be achieved, it is connected again through distribution platform (4) with to inflatable body source (6), until airtight interior air pressure ≥1 atmospheric pressure of A chamber (2); C) successively by hollow-core photonic crystal fiber (1) both ends and standard single-mode fiber (10) welding in≤1.5min; D) by formula
Obtain the gas pressure distribution function p (x) in hollow-core photonic crystal fiber (1) fibre core; E) the intracavitary final atmospheric pressure value of all -fiber high pressure gas is calculated by more than one p (x). It can accurately determine the intracavitary atmospheric pressure value of all -fiber high pressure gas.
Description
Technical field the present invention relates to the method for making in a kind of full fiber-optic fiber gas chamber, especially a kind of method for making of the full optical fiber heavy pressure gas chamber based on hollow-core photonic crystal fiber.
Background technology hollow-core photonic crystal fiber (Hollow-core photonic crystal fiber, be called for short HC-PCF) be the low-loss transmission optical fiber of new generation that development in recent years is got up, have the incomparable unusual characteristic of traditional fiber, all have important use at light and material nonlinear interaction, the transmission of high power light wave energy, light pulse chromatic dispersion and aspects such as nonlinear transport control and novel photonic device.
Because hollow-core photonic crystal fiber is limited in light wave in the fibre core macropore and transmits with the basic mode form, after filled media in this macropore, can make the interaction area between light wave and the filled media remain micron dimension, and the low-loss transmission characteristic of optical fiber has guaranteed the effective interaction distance, thereby can significantly strengthen the repercussion effect of light wave and material.For a long time, the low-density gaseous medium is low because of nonlinear factor, nonlinear effect threshold value height, caused the difficulty with the light wave nonlinear interaction, and hollow-core photonic crystal fiber provides brand-new research platform for nonlinear interaction between research low-density gaseous medium and the light wave just.At present, hollow-core photonic crystal fiber has been applied to research and has comprised from phase modulation (PM), stimulated Raman scattering, four-wave mixing, electromagnetism and causing in the nonlinear optical process such as transparent that one of Primary Component of this class work is exactly the hollow core photon crystal fiber-optic fiber gas chamber.Now, though various types of hollow core photon crystal fiber-optic fiber gas chamber is arranged, as the hollow-core photonic crystal fiber two ends all being placed in the blanket gas body cavity that has optical window, or hollow-core photonic crystal fiber integral body placed in the gaseous tension chamber, or an end and standard single-mode fiber (SMF) welding, the other end of hollow-core photonic crystal fiber placed in the blanket gas body cavity that has optical window; The air pressure in these hollow core photon crystal fiber-optic fiber gas chambeies is by the control of extraneous gas chamber, and light wave is then realized the coupling input and output by optical window and hollow-core photonic crystal fiber, and all there is the shortcoming that coupling is difficult, loss is big in they.For addressing this problem, people have done some trials and effort, as " a kind of hollow-core fiber gas box optical devices with optical fiber interface and preparation method thereof (the AN OPTICALASSEMBLY OF A HOLLOW CORE FIBRE GAS CELL SPLICED TO FIBRE END ANDMETHODS OF ITS PRODUCTION) " that discloses among the patent application specification WO 2006/077437A1 of disclosed World Intellectual Property Organization on July 27th, 2006.Full fiber-optic fiber gas chamber that provides a kind of hollow-core photonic crystal fiber and preparation method thereof is provided for it, wherein, full fiber-optic fiber gas chamber is that the two ends by the hollow-core photonic crystal fiber that is full of specific gas in it all constitute with the standard single-mode fiber welding, its method for making is, earlier with hollow-core photonic crystal fiber one end and standard single-mode fiber welding, and the residual gas in the hollow-core photonic crystal fiber is extracted out by the vacuum pump that links to each other with the hollow-core photonic crystal fiber other end, charge into required gases at high pressure again, at last this end also is welding together formation full fiber type gas high pressure chest with standard single-mode fiber, this method can obtain sufficiently high gas purity.But, because the hollow-core photonic crystal fiber fibre core only is several microns, its gas filling process belongs to microtubule pipe flow problem, make that this method for making is difficult to determine the air pressure size in the chamber and distribute, particularly when used hollow-core photonic crystal fiber length is longer, can't judge its air pressure inside, thereby quantitative examination gas medium and light wave nonlinear interaction are caused difficulty.
The summary of the invention the technical problem to be solved in the present invention is for overcoming weak point of the prior art, and a kind of method for making based on the full optical fiber heavy pressure gas chamber of hollow-core photonic crystal fiber that can accurately determine air chamber internal gas pressure value is provided.
For solving technical matters of the present invention, the technical scheme that is adopted is: comprise based on the method for making of the full optical fiber heavy pressure gas chamber of hollow-core photonic crystal fiber charging into desired gas in hollow-core photonic crystal fiber, and priority is with the two ends and the standard single-mode fiber welding of hollow-core photonic crystal fiber, particularly said method comprises following steps: (a) with the two ends of hollow-core photonic crystal fiber respectively with airtight A chamber, airtight B chamber is connected, wherein, airtight A chamber has rain glass, airtight B chamber and distribution platform are connected, said distribution platform respectively with vacuum pump, body source to be inflated is connected; (b) airtight A chamber, hollow-core photonic crystal fiber and airtight B chamber are connected through distribution platform and vacuum pump earlier, wait to reach required vacuum tightness after, be connected atmospheric pressure value 〉=1 atmospheric pressure in airtight A chamber through distribution platform and body source to be inflated again; (c) end-grain cutting that earlier hollow-core photonic crystal fiber is connected with airtight A chamber is disconnected, and with itself and standard single-mode fiber welding, an end-grain cutting that will be connected with airtight B chamber is disconnected again, and with itself and standard single-mode fiber welding, wherein, being communicated with between hollow-core photonic crystal fiber and airtight A chamber or airtight B chamber is cut off, and to the time interval that finishes with the standard single-mode fiber welding is≤1.5min; (d) by formula
Draw the gas pressure distribution function p (x) in the hollow-core photonic crystal fiber fibre core, in the formula: p (1) is the air pressure in the airtight A chamber when cutting off being communicated with of hollow-core photonic crystal fiber and airtight A chamber, c=8K
n, a=∏+c, b=(∏-1) (∏+1+2c), the ∏ air pressure in the airtight B chamber and the ratio of the air pressure in the airtight A chamber when cutting off being communicated with of hollow-core photonic crystal fiber and airtight A chamber, K
n=λ/H is the Kundsen coefficient that flows, and λ is the mean free path of waiting to inflate the body molecule, and H is the core diameter of hollow-core photonic crystal fiber; (e) calculate the interior final atmospheric pressure value of full optical fiber heavy pressure gas chamber by more than one p (x).
As further improvement based on the method for making of the full optical fiber heavy pressure gas chamber of hollow-core photonic crystal fiber, between the two ends of described hollow-core photonic crystal fiber and airtight A chamber, airtight B chamber through the fluid sealant bonding connection; Be equipped with rain glass and valve in the described distribution platform; During being communicated with between described cut-out hollow-core photonic crystal fiber and airtight A chamber, waiting to inflate body source and continue to the inflation of airtight B chamber, when until between hollow-core photonic crystal fiber and airtight B chamber, being cut off; Described being cut to cut off or cut off; After air pressure in the described airtight A chamber was 3MPa, the end-grain cutting that hollow-core photonic crystal fiber is connected with airtight A chamber was disconnected again; Welding uses mutually is the FSM-50S type arc discharge fiber heat sealing machine of Fujikura company for described hollow-core photonic crystal fiber and standard single-mode fiber, and the strength of discharge during welding is that 10mA, discharge time are 200ms; After the two ends of described hollow-core photonic crystal fiber and the standard single-mode fiber welding, be placed on earlier and check impermeability in the water, and then reinforce with heat-shrink tube.
Beneficial effect with respect to prior art is, one, experimental study by being and in conjunction with the analysis of microtubule pipe flow theory to hollow core photon crystal fiber-optic fiber gas filling process medium power scholarship and moral conduct, in gas replenishment process, the two ends of hollow-core photonic crystal fiber exist draught head, and the air pressure distribution gradient state that it is inner, this is because the diameter approximate number micron only of pore in the hollow-core photonic crystal fiber, gas flow has bigger Knudsen coefficient (K
n), belong to microtubule pipe stream category thereby make the hollow-core photonic crystal fiber gases at high pressure fill.At this situation, employing with the two ends of hollow-core photonic crystal fiber respectively with have barometric airtight A chamber, airtight B chamber is connected, one end of distribution platform and airtight B chamber join, the other end respectively with vacuum pump, what body source to be inflated was connected takes out, the distribution structure, and with airtight A chamber, hollow-core photonic crystal fiber and airtight B chamber are connected through distribution platform and vacuum pump earlier, after waiting to reach required vacuum tightness, be connected through distribution platform and body source to be inflated again, atmospheric pressure value 〉=1 in airtight A chamber is atmospheric bleeds and the technological process of distribution, the determinacy of two ends air pressure when having guaranteed hollow-core photonic crystal fiber and standard single-mode fiber welding has reduced to influence the uncertain factor of hollow core photon crystal fiber-optic fiber gas chamber internal gas pressure; They are two years old, a large amount of experiments of the gas leakage situation when splitting emptying core photonic crystal fiber side a and b, its result shows, the relative intracavity gas total amount of the gas flow of Guo Louing is less at short notice, therefore, as long as successively the two ends of hollow-core photonic crystal fiber and standard single-mode fiber are welding together in≤1.5min respectively, when just both having guaranteed that hollow-core photonic crystal fiber was cut off, the section part at its two ends does not have foreign gas and enters in the optical fiber, only there is near the gas of hollow-core photonic crystal fiber section to have enough time to leak away again, and when the length of hollow-core photonic crystal fiber was longer, the gas flow that leaks in the fusion process can be ignored; They are three years old, after under the situation that hollow-core photonic crystal fiber two ends air pressure is all determined itself and standard single-mode fiber being welding together, gas in the air chamber can reach air pressure balance by freely spreading finally, its inner gas pressure distribution in the time of can calculating cut-out optical fiber two ends according to the microtubule pipe flow theory is promptly by formula
Draw the gas pressure distribution function p (x) in the hollow-core photonic crystal fiber, and and then calculate final atmospheric pressure value in the full optical fiber heavy pressure gas chamber by more than one p (x).
Further embodiment as beneficial effect, the one, between the two ends of hollow-core photonic crystal fiber and airtight A chamber, airtight B chamber through the fluid sealant bonding connection, can not only guarantee the vacuum tightness when hollow-core photonic crystal fiber bled, can prevent that also foreign gas from entering hollow-core photonic crystal fiber; The 2nd, when cutting off being communicated with between hollow-core photonic crystal fiber and airtight A chamber, wait to inflate body source and continue to inflate to airtight B chamber, when until between hollow-core photonic crystal fiber and airtight B chamber, being cut off, guaranteed the determinacy of hollow-core photonic crystal fiber internal gas pressure as much as possible; The 3rd, what hollow-core photonic crystal fiber and standard single-mode fiber were selected for use during welding mutually is the FSM-50S type arc discharge fiber heat sealing machine of Fujikura company, the preferred 10mA of strength of discharge during welding, discharge time preferred 200ms, both can reach welding result preferably, can make pairing loss value minimum again, only be 2dB; The 4th, after the two ends of hollow-core photonic crystal fiber and the standard single-mode fiber welding, be placed on earlier and check impermeability in the water, and then reinforce with heat-shrink tube, prevented that revealing the integral body that causes because of welding point does over again.
Description of drawings is described in further detail optimal way of the present invention below in conjunction with accompanying drawing.
Fig. 1 realizes a kind of basic structure synoptic diagram of the present invention;
Fig. 2 is the cross sectional representation of hollow-core photonic crystal fiber;
Fig. 3 is the synoptic diagram after hollow-core photonic crystal fiber two ends and the standard single-mode fiber welding.
Embodiment is referring to Fig. 1, and method for making is: at first, the two ends of hollow-core photonic crystal fiber 1 are communicated with through the fluid sealant bonding connection with 3 in airtight A chamber 2, airtight B chamber respectively; Wherein, hollow-core photonic crystal fiber 1 is the HC-1060-02 type that Crystal Fiber A/S company produces, its length be 50m, cross-sectional structure as shown in Figure 2, the diameter of fibre core is that 9.7 μ m, covering pitch of holes are that 2.75 μ m, porous regional diameter are 50 μ m.Airtight A chamber 2 has rain glass 7, and airtight B chamber 3 is connected with distribution platform 4.The distribution platform 4 that is built-in with rain glass 8 and valve 9 respectively with vacuum pump 5, wait to inflate body source 6 and be connected.Then, airtight A chamber 2, hollow-core photonic crystal fiber 1 and airtight B chamber 3 are connected through distribution platform 4 and vacuum pump 5 earlier, wait to reach required vacuum tightness after, now be 0.001MPa, again through distribution platform 4 and wait to inflate body source 6 source nitrogens and be connected.The concrete air pressure that is operating as earlier by rain glass 8 and the airtight B of valve 9 controls chamber 3 is 6MPa.Because the two ends of hollow-core photonic crystal fiber 1 exist pressure differential, gas will flow along its fibre core macropore and covering aperture.Afterwards, after the air pressure in airtight A chamber 2 reaches 3MPa, earlier hollow-core photonic crystal fiber 1 is cut off with the end that airtight A chamber 2 is connected, and promptly with itself and standard single-mode fiber 10 weldings, to cut off with the end that airtight B chamber 3 is connected again, and equally promptly with itself and standard single-mode fiber 10 weldings, wherein, being communicated with of 3 in hollow-core photonic crystal fiber 1 and airtight A chamber 2 or airtight B chamber cut off, and is about 1min (can finish) to the time interval that finishes with standard single-mode fiber 10 weldings in≤1.5min.Welding is employed mutually is the FSM-50S type arc discharge fiber heat sealing machine of Fujikura company for hollow-core photonic crystal fiber 1 and standard single-mode fiber 10, and the strength of discharge during welding is that 10mA, discharge time are 200ms.When cutting off being communicated with of hollow-core photonic crystal fiber 1 and 2 in airtight A chamber, wait to inflate body source 6 source nitrogens and continue to 3 inflations of airtight B chamber, when 3 quilts of hollow-core photonic crystal fiber 1 and airtight B chamber are cut off.Then, have the hollow-core photonic crystal fiber 1 of standard single-mode fiber 10 to place water to check impermeability the two ends welding earlier, the reusable heat draw is reinforced it, makes the full optical fiber heavy pressure gas chamber based on hollow-core photonic crystal fiber as shown in Figure 3.At last, the gas in the full optical fiber heavy pressure gas chamber will finally reach air pressure balance by freely spreading.Can be earlier by formula
Draw the gas pressure distribution function p (x) in hollow-core photonic crystal fiber 1 fibre core, in the formula: the air pressure that p (1) airtight A chamber 2 when cutting off being communicated with of hollow-core photonic crystal fiber 1 and airtight A chamber 2 is interior now is 3MPa, c=8K
n, a=∏+c, (∏+1+2c), ∏ are the ratio of the interior air pressure in the air pressure in the airtight B chamber 3 and airtight A chamber 2 when cutting off being communicated with of hollow-core photonic crystal fiber 1 and airtight A chamber 2 to b=(∏-1), now are 2, K
n=λ/H is the Kunds en coefficient that flows, and λ is a molecule mean free path of waiting to inflate body nitrogen, now is 0.055 μ m, and H is the core diameter of hollow-core photonic crystal fiber 1, now is 9.7 μ m.Calculate the interior final atmospheric pressure value of full optical fiber heavy pressure gas chamber by more than one p (x) again.In the process of welding, the end face of hollow-core photonic crystal fiber 1 is exposed to about one minute of airborne time, and as calculated, the gas flow of leakage accounts for 4 percent of the interior gas gross of full optical fiber heavy pressure gas chamber, and deduction leaks, and final air pressure is about 4.4MPa in the chamber.
Obviously, those skilled in the art can carry out various changes and modification to the method for making of the full optical fiber heavy pressure gas chamber based on hollow-core photonic crystal fiber of the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1. method for making based on the full optical fiber heavy pressure gas chamber of hollow-core photonic crystal fiber, comprise to hollow-core photonic crystal fiber (1) and charge into desired gas, and, it is characterized in that said method comprises following steps successively with the two ends and standard single-mode fiber (10) welding of hollow-core photonic crystal fiber (1):
(a) two ends with hollow-core photonic crystal fiber (1) are connected with airtight A chamber (2), airtight B chamber (3) respectively, wherein, airtight A chamber (2) has rain glass (7), airtight B chamber (3) is connected with distribution platform (4), and said distribution platform (4) is connected with vacuum pump (5), body source to be inflated (6) respectively;
(b) airtight A chamber (2), hollow-core photonic crystal fiber (1) and airtight B chamber (3) are connected through distribution platform (4) and vacuum pump (5) earlier, after waiting to reach required vacuum tightness, be connected atmospheric pressure value 〉=1 atmospheric pressure in airtight A chamber (2) through distribution platform (4) and body source to be inflated (6) again;
(c) end-grain cutting that earlier hollow-core photonic crystal fiber (1) is connected with airtight A chamber (2) is disconnected, and with itself and standard single-mode fiber (10) welding, an end-grain cutting that will be connected with airtight B chamber (3) is disconnected again, and with itself and standard single-mode fiber (10) welding, wherein, being communicated with between hollow-core photonic crystal fiber (1) and airtight A chamber (2) or airtight B chamber (3) is cut off, and to the time interval that finishes with standard single-mode fiber (10) welding is≤1.5min;
(d) by formula
Draw the gas pressure distribution function p (x) in hollow-core photonic crystal fiber (1) fibre core, in the formula: p (1) is the interior air pressure in airtight A chamber (2) when cutting off being communicated with of hollow-core photonic crystal fiber (1) and airtight A chamber (2), c=8K
n, a=П+c, b=(П-1) (ratio of the air pressure that П+1+2c), the П air pressure in airtight B chamber (3) and airtight A chamber (2) when cutting off being communicated with of hollow-core photonic crystal fiber (1) and airtight A chamber (2) is interior, K
n=λ/H is the Kundsen coefficient that flows, and λ is the mean free path of waiting to inflate the body molecule, and H is the core diameter of hollow-core photonic crystal fiber (1);
(e) calculate the interior final atmospheric pressure value of full optical fiber heavy pressure gas chamber by more than one p (x).
2. the method for making of the full optical fiber heavy pressure gas chamber based on hollow-core photonic crystal fiber according to claim 1 is characterized in that between the two ends of hollow-core photonic crystal fiber (1) and airtight A chamber (2), airtight B chamber (3) through the fluid sealant bonding connection.
3. the method for making of the full optical fiber heavy pressure gas chamber based on hollow-core photonic crystal fiber according to claim 1 is characterized in that being equipped with in the distribution platform (4) rain glass (8) and valve (9).
4. the method for making of the full optical fiber heavy pressure gas chamber based on hollow-core photonic crystal fiber according to claim 1, when it is characterized in that cutting off being communicated with between hollow-core photonic crystal fiber (1) and airtight A chamber (2), body source to be inflated (6) continues to airtight B chamber (3) inflation, when being cut off until between hollow-core photonic crystal fiber (1) and airtight B chamber (3).
5. the method for making of the full optical fiber heavy pressure gas chamber based on hollow-core photonic crystal fiber according to claim 1 is characterized in that being cut to and cuts off or cut off.
6. the method for making of the full optical fiber heavy pressure gas chamber based on hollow-core photonic crystal fiber according to claim 1, after it is characterized in that the interior air pressure in airtight A chamber (2) is 3MPa, the end-grain cutting that hollow-core photonic crystal fiber (1) is connected with airtight A chamber (2) is disconnected again.
7. the method for making of the full optical fiber heavy pressure gas chamber based on hollow-core photonic crystal fiber according to claim 1, what it is characterized in that hollow-core photonic crystal fiber (1) and standard single-mode fiber (10) welding uses mutually is the FSM-50S type arc discharge fiber heat sealing machine of Fujikura company, and the strength of discharge during welding is that 10mA, discharge time are 200ms.
8. the method for making of the full optical fiber heavy pressure gas chamber based on hollow-core photonic crystal fiber according to claim 1, after it is characterized in that the two ends and standard single-mode fiber (10) welding of hollow-core photonic crystal fiber (1), be placed on earlier and check impermeability in the water, and then reinforce with heat-shrink tube.
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| CN101871791B (en) * | 2010-06-30 | 2012-03-14 | 中国人民解放军国防科学技术大学 | Multi-parameter sensor and measurement system based on photonic crystal fiber |
| CN103364343A (en) * | 2012-04-10 | 2013-10-23 | 天津大学 | Optical fiber gas chamber device based on hollow-core photonic crystal optical fiber |
| CN103048119B (en) * | 2012-12-08 | 2015-06-03 | 华中科技大学 | Detection method and device for gas filling rate of hollow optical fiber |
| CN103513326B (en) * | 2013-07-17 | 2015-07-08 | 中国科学院安徽光学精密机械研究所 | Manufacturing method for full-fiber hollow-core photonic crystal fiber low-pressure gas cavity |
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| CN106495464B (en) * | 2016-10-27 | 2018-10-16 | 北京航空航天大学 | A kind of air pressure control method and device drawn for photon band-gap optical fiber |
| CN106768859B (en) * | 2016-12-09 | 2019-03-19 | 中国科学院物理研究所 | A kind of spectrum widening device based on large mode field antiresonance hollow-core photonic crystal fiber |
| CN106483606B (en) * | 2016-12-26 | 2018-02-23 | 中国人民解放军国防科学技术大学 | A kind of low-loss all -fiber low pressure gas lumen of body system and its implementation |
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| CN110568547B (en) * | 2019-08-21 | 2020-07-07 | 武汉安扬激光技术有限责任公司 | Gas filling device and gas filling method for hollow-core photonic crystal fiber |
| CN111504922A (en) * | 2020-04-07 | 2020-08-07 | 武汉大学 | Device and method for detecting gas components in GIS (gas insulated switchgear) based on hollow-core photonic crystal fiber |
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| CN1396467A (en) * | 2002-05-18 | 2003-02-12 | 哈尔滨工程大学 | Hollow optical fibre of photon coystal plastics and its preparing process |
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