CN102322876B - Passive phase compensation structure for all-optical-fiber interferometer and manufacture method thereof - Google Patents
Passive phase compensation structure for all-optical-fiber interferometer and manufacture method thereof Download PDFInfo
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- CN102322876B CN102322876B CN 201110255841 CN201110255841A CN102322876B CN 102322876 B CN102322876 B CN 102322876B CN 201110255841 CN201110255841 CN 201110255841 CN 201110255841 A CN201110255841 A CN 201110255841A CN 102322876 B CN102322876 B CN 102322876B
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Abstract
The invention relates to a passive phase compensation structure for an all-optical-fiber interferometer, which comprises a foaming rubber-plastic heat insulation material body, wherein an annular groove is arranged inside the foaming rubber-plastic heat insulation material body, an optical fiber interference ring is accommodated in the annular groove, an inner layer aluminum foil paper layer, a first composite ceramic heat insulation coating layer, a first DOK polyester glass dielectric slab layer, a special polyurethane polymer sound-absorbing heat insulation material layer, a second DOK polyester glass dielectric slab layer, a second composite ceramic heat insulation coating layer, a heat insulation and thermal preservation material layer, a foaming rubber-plastic heat insulation material layer and an outer aluminum foil paper layer are sequentially covered outside the foaming rubber-plastic heat insulation material body. The passive phase compensation structure reaches a high-stability passive phase compensation level. Experiments show that through the passive phase compensation structure, the unit length arm length difference phase drift speed of the all-optical-fiber interferometer placed in the passive phase compensation is greatly reduced.
Description
Technical field
The present invention relates to the fibre optic interferometer technical field, be specifically related to passive phase compensation structure of a kind of full optical fiber interferometer and preparation method thereof.
Background technology
Interference is the fundamemtal phenomena of optics, utilizes optical fiber to realize interference of light, is the important application of light interference phenomena.Full optical fiber interferometer utilizes optical fiber to replace the lens combination formation, and except beam splitter, other all light paths all are formed by connecting with optical fiber, so be referred to as full optical fiber interferometer in whole instrument.Full optical fiber interferometer is widely used in the technical fields such as Fibre Optical Sensor, optical fiber communication, quantum secret communication because of plurality of advantages such as its shape can arbitrarily change, body weight is light, compact conformation and sensitivity height.Its basic functional principle is: utilize the optical device such as beam-splitting coupler, catoptron first light beam to be divided into two-way or multichannel, then not going the same way by each is transferred to each coincident configuration one-tenth stack interference again along separate routes of the other end (perhaps be transferred to the other end and reflect back into initial point by anti-mirror) through (being referred to as " arm ").each arm (path) can be made identical length as required also can make different length, like this, if external environment is such as temperature, noise, the words of the factors vary such as vibrations, slight variation will occur in the optical fibre refractivity on each arm or fiber lengths, like this will be on different arm generation impacts in various degree, if transmitting, light will produce different change in optical path length on different arms, cause that namely phase differential between each arm is fixing and form random drift with external environmental interference, make correctly information extraction of full optical fiber interferometer, the final normal operation that affects full optical fiber interferometer.So for full optical fiber interferometer can be worked, just be necessary that very full optical fiber interferometer is carried out effective passive phase compensation to be processed, and reduces external environment to its impact as far as possible.Passive phase compensation comprises adopts low expansion coefficient material to make interference ring, employing integrated technique etching interference ring, increase shock attenuation device and carry out accurate temperature control etc.Have at present corresponding research group to do this passive Phase Compensation both at home and abroad, but effect not fine, and there is no corresponding matured product on market.And this patent is exactly the passive phase compensation structure that adopts low-down thermal expansivity, coefficient of heat conductivity material and very high soundproof effect material to make interference ring.
Summary of the invention
The technical matters that the present invention solves is to overcome the deficiencies in the prior art, and a kind of passive phase compensation structure of full optical fiber interferometer with high stable level and preparation method thereof is provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
The passive phase compensation structure of a kind of full optical fiber interferometer, comprise that inside offers the foamed rubber-plastic heat insulation material body of annular groove, accommodate fiber interferometer in described annular groove, external unlined aluminium foil paper layer, the first composite ceramic adiabatic coating layer, a DOK polyester glass medium flaggy, special polyurethane high molecule sound-absorbing insulation material layer, the 2nd DOK polyester glass medium flaggy, the second composite ceramic adiabatic coating layer, heat-insulating material layer, foamed rubber-plastic heat insulation material layer and the outer foil ply of paper of being enclosed with successively of described foamed rubber-plastic heat insulation material; Pass from layers of material for the optical fiber that is connected to the external signal input and output on described full optical fiber interferometer.The bipeltate that foamed rubber-plastic heat insulation material body in the present invention and foamed rubber-plastic heat insulation material layer adopt, be the nitrile rubber with excellent performance, Polyvinylchloride is primary raw material, through banburying, the special process such as sulfur foam are made, and have good thermal insulation, insulation effect.The aluminium foil ply of paper has that light reflectivity is high, airtight, waterproof, good seal performance and heat reflectivity high, thereby possesses thermal radiation resistant, heat-blocking action.Composite ceramic adiabatic coating layer has the adiabatic heat-insulation effect.DOK polyester glass medium flaggy can completely cut off the infrared ray up to 90%, have fast light, water-fast, moisture-proof, the characteristic such as high temperature resistant, play the effect of sealing, thermal insulation and support structure, as the medium that depends on of special polyurethane high molecule sound-absorbing insulation material layer and composite ceramic adiabatic coating layer.Special polyurethane high molecule sound-absorbing insulation material layer plays deadening, and sound transmission loss is up to 42dB.Composite ceramic adiabatic coating layer plays thermal insulation, insulation effect.The present invention has adopted the good macromolecule sound-proof material of multiple coefficient of heat conductivity very low special thermal insulation, insulation material and sound insulation value; and adopted multi-layer sealed technology to process; the full optical fiber interference ring of required protection is sealed in the inside one deck; by inner toward various heat-insulating materials of sealed package layer by layer and sound insulation, radiation proof material; thereby greatly reduce to be placed in innermost fiber interferometer because external environment condition changes suffered impact, reached a passive phase compensation level of high stable.
The fiber interferometer that full optical fiber interferometer is turned to ring-type can improve the integrated level of structure, but must be too severe if optical fiber is crooked, and its loss meeting becomes very large; And increase the final size of structure around crossing conference, therefore under the prerequisite that guarantees enough integrated levels, that tries one's best encompasses one than circlet, the experiment proved that, preferably be of a size of, internal diameter 〉=the 9cm of described fiber interferometer, external diameter≤20cm, the radial width scope 0.1-0.5cm of described fiber interferometer; The internal diameter of described annular groove is less than the internal diameter of fiber interferometer, and external diameter is greater than the external diameter of fiber interferometer.The magnitude relationship of the internal diameter of fiber interferometer, external diameter and radial width is: (outside dimension) deducts (internal diameter size) and equals (radial width 2 times).
Foamed rubber-plastic heat insulation material layer thickness scope is 0.5-1cm; The wet resistance factor mu of described foamed rubber-plastic heat insulation material body and foamed rubber-plastic heat insulation material layer 〉=10000, coefficient of heat conductivity λ≤0.034W/ (mK).
The thickness range of described the first composite ceramic adiabatic coating layer and the second composite ceramic adiabatic coating layer is 0.2-0.4cm, coefficient of heat conductivity≤0.054 W/ (mK).
The thickness range of a described DOK polyester glass medium flaggy and the 2nd DOK polyester glass medium flaggy is 0.3-0.4cm.
The thickness range of unlined aluminium foil paper layer and outer foil ply of paper is 0.03-0.05cm, and light reflectivity and heat reflectivity are all greater than 90%.
The material of described heat-insulating material layer is aerosil, aerosil is known as again " blue smoke ", " solid cigarette ", it is present the lightest known solid material, it is also heat-insulating property best material up to now, coefficient of heat conductivity is 0.013-0.025 W/ (mK), and thickness range is 0.5-2cm.And aerosil lightweight, transparent is very good heat-insulating material.Obviously, other the solid, powdery material less than aerosil coefficient of heat conductivity is applicable to the present invention too.
Described foamed rubber-plastic heat insulation material shape is rectangular parallelepiped, cylinder or spheroid.For effective fixed fiber interference ring, reduce to greatest extent its impact of outer bound pair simultaneously, the space between described annular groove and fiber interferometer is filled with aerosil, to play the more directly effect of adiabatic heat-insulation, avoids ectocine.Simultaneously due to and annular groove between the space be filled full, also can effective shock, prevent that fiber interferometer from rocking in annular groove.
The method for making of the passive phase compensation structure of above-mentioned full optical fiber interferometer comprises the following steps:
In described step 2, full aerosil is filled in the space between annular groove and fiber interferometer.
compared with prior art, the beneficial effect of technical solution of the present invention is: the present invention has adopted the very low special thermal insulation of multiple coefficient of heat conductivity, the good macromolecule sound-proof material of insulation material and sound insulation value, and adopted multi-layer sealed technology to process, the full optical fiber interference ring of required protection is sealed in the inside one deck, by the inner past various heat-insulating materials of sealed package and sound insulation layer by layer, radiation proof material, thereby greatly reduce to be placed in innermost fiber interferometer and change suffered impact because of external environment condition, reached a passive phase compensation level of high stable.And simultaneously, experimental data also shows, adopts the stability of the full optical fiber interferometer of the passive phase compensation structure of the present invention to obtain very large raising than prior art.
Description of drawings
The passive phase compensation structural perspective of Fig. 1 full optical fiber interferometer of the present invention;
The cross-sectional view of Fig. 2 Fig. 1;
Fig. 3 is the test pattern of the passive phase compensation structure of full optical fiber interferometer of the present invention.
Embodiment
Below in conjunction with drawings and Examples, technical scheme of the present invention is described further.
Be the passive phase compensation structural representation of full optical fiber interferometer of the present invention as depicted in figs. 1 and 2, make for convenient, be rectangular shape, concrete structure comprises that inside offers the foamed rubber-plastic heat insulation material body 10 of annular groove, accommodates fiber interferometer 11 in annular groove.The ratio fiber interferometer that annular groove is done is slightly large, and the internal diameter of annular groove is less than the internal diameter of fiber interferometer, and external diameter is greater than the external diameter of fiber interferometer.The internal diameter of fiber interferometer 11 is 9cm, and external diameter is 9.2cm, and namely the radial width of fiber interferometer is 0.1cm.The internal diameter of annular groove is 8cm, and external diameter is 10cm.Foamed rubber-plastic heat insulation material body 10 is rectangular parallelepiped, and it is fixed that its size is come according to fiber interferometer, take receiving optical fiber interference ring fully as standard.In the present embodiment, for economical with materials to a greater extent, the face of the foamed rubber-plastic heat insulation material body 10 that the anchor ring of fiber interferometer 11 is corresponding is designed to square, and in the present embodiment, foamed rubber-plastic heat insulation material body 10 is of a size of 12.6cm*12.6cm*2.6cm.Be enclosed with successively unlined aluminium foil paper layer 9, the first composite ceramic adiabatic coating layer 8, a DOK polyester glass medium flaggy 7, special polyurethane high molecule sound-absorbing insulation material layer 6, the 2nd DOK polyester glass medium flaggy 5, the second composite ceramic adiabatic coating layer 4, heat-insulating material layer 3, foamed rubber-plastic heat insulation material layer 2 and outer foil ply of paper 1 outside foamed rubber-plastic heat insulation material body 10.
Pass from layers of material for two optical fiber A, B being connected to the external signal input and output on full optical fiber interferometer, wherein one is signal input port, and one is signal outlet.
Each layer thickness is as follows:
Unlined aluminium foil paper layer 9 and outer foil ply of paper 1 thickness are 0.05cm, what adopt is high-performance thermal radiation resistant aluminum foil paper material, have that light reflectivity is high, airtight, waterproof, good seal performance, heat reflectivity high, light reflectivity and heat reflectivity are all up to more than 90%;
The first composite ceramic adiabatic coating layer 8 and the second composite ceramic adiabatic coating layer 4 thickness are 0.3cm, employing be the composite ceramic adiabatic coating of the excellent performance of coefficient of heat conductivity≤0.054W/(mK).
The thickness of the one DOK polyester glass medium flaggy 7 and the 2nd DOK polyester glass medium flaggy 5 is 0.4cm, and the DOK polyester glass medium plate material of this layer employing can completely cut off the infrared ray up to 90%, fast light, water-fast, moisture-proof, high temperature resistant.
Heat-insulating material layer 3 thickness are 1cm, and the material that adopts is aerosil, and thermal conductivity is minimum in all solids material, and lightweight is transparent, and coefficient of heat conductivity is in 0.013～0.025 W/ (mK) scope.
Foamed rubber-plastic heat insulation material layer 2 thickness are 1cm, and this layer and foamed rubber-plastic heat insulation material body 10 have low-down coefficient of heat conductivity, and coefficient of heat conductivity λ≤0.034W/ (mK) has high wet resistance factor mu 〉=10000 simultaneously.
For the interferometer of different brachiums, the arm length difference between dissimilar arm and the stability of interferometer are inversely proportional to, and namely in the situation that other condition is identical, arm length difference is larger, and stability is just poorer.If weigh the stability of interference ring with unit arm length difference phase drift speed, present passive Phase Compensation both domestic and external, the level of stability that generally can accomplish is: the average of unit arm length difference phase drift speed is the 0.2rad/min left and right.And change as shown in test pattern as unit length arm length difference phase place in Fig. 3, the passive phase compensation structure of the present embodiment, the average of unit length arm length difference phase drift speed is 0.06 rad/min, and when more stable, unit length arm length difference phase drift speed can reach about 0.01 rad/min.This shows, greatly improved the stability of full optical fiber interferometer than prior art the present invention.
The method for making of the passive phase compensation structure of above-mentioned full optical fiber interferometer comprises the following steps:
Offering annular groove in step 2 with the concrete grammar of laying fiber interferometer is:
(2.1) the foamed rubber-plastic material is cut into the foamed rubber-plastic heat insulation material body 10 of the rectangular shape of above-mentioned size;
(2.2) 2/3 place of foamed rubber-plastic heat insulation material body 10 with height is as the criterion and cuts into two halves;
(2.3) be cutting out thickness that 2/3 this piece is as the criterion with the center, dig an internal diameter and be 8cm, external diameter and be 10cm, the degree of depth and be the annular groove of this piece thickness half (first step cut out rectangular parallelepiped thickness 1/3); Above-mentioned size can be adjusted according to the size of fiber interferometer 11, as long as enough spaces that is used for the receiving optical fiber interference ring can be provided.
(2.4) fiber interferometer is put into annular groove, recharge full aerosil;
(2.5) use " NCC insulation glue " with foamed rubber-plastic material adapted that this two-layer being pasted together that just is cut into two halves is become original rectangular structure.
The concrete steps of making the first box body in step 4 are:
(4.1) coat special polyurethane high molecule sound-absorbing insulation material layer 6 at two blocks of DOK polyester glass medium plates (i.e. a DOK polyester glass medium flaggy 7 and the 2nd DOK polyester glass medium flaggy 5) opposite face, same method is made six faces, then be glued together with the polyester glass glue and make a rectangular parallelepiped box, reserve a face first bonding without the polyester glass glue, keep and do lid.
(4.2) be coated in inside surface and the outside surface of each face of the rectangular parallelepiped of above making with the composite ceramic adiabatic coating, form the first composite ceramic adiabatic coating layer 8 at inside surface, outside surface forms the second composite ceramic adiabatic coating layer 4, is made into the first box body.This first box body essence plays good sound-insulating effect, can be referred to as " sound-insulating box ".
(4.3) structure of the gained of step 3 is put into " sound-insulating box ", good with " polyester glass glue " adhesive seal after cover lid.
Because noise is very large on the impact of fibre optic interferometer, to process so will do sound insulation, the special polyurethane high molecule sound-absorbing insulation material oise insulation factor in step 4 has satisfied the sound insulation demand fully up to 42dB.DOK polyester glass medium plate plays the effect of sealing, thermal insulation, support structure, and can allow special polyurethane high molecule sound-absorbing insulation material and composite ceramic adiabatic coating be coated in its surface and form very firmly bonding effect, difficult drop-off.
In step 5 be utilize foamed rubber-plastic heat insulation material and with it the NCC insulation glue of adapted make the second box body of rectangular shape, it is same that to reserve one side not bonding as lid.
When in step 6, the first box body being placed in the second box body, in order better to make and locate the second box body, also can fill the foam rubbery material of fritter in the space of the first box body and the second box body.So that the first box body is positioned at the centre of the second box body.After aerosil to be filled is complete, cover the lid of the first box body of reserving in step 5, and good with NCC insulation glue adhesive seal.
The present embodiment is similar to Example 1, and difference only is, the size difference of layers of material:
The internal diameter of fiber interferometer 11 is 14cm, the 14.4cm of external diameter, and namely the radial width of fiber interferometer is 0.2cm.The internal diameter of annular groove is 13cm, and external diameter is 15cm;
Unlined aluminium foil paper layer 9 and outer foil ply of paper 1 thickness are 0.03cm;
The first composite ceramic adiabatic coating layer 8 and the second composite ceramic adiabatic coating layer 4 thickness are 0.2cm;
The thickness of the one DOK polyester glass medium flaggy 7 and the 2nd DOK polyester glass medium flaggy 5 is 0.3cm;
Heat-insulating material layer 3 thickness are 0.5cm;
Foamed rubber-plastic heat insulation material layer 2 thickness are 0.5cm.
The present embodiment is similar to Example 1, and difference only is, the size difference of layers of material:
The internal diameter of fiber interferometer 11 is 19cm, the 20cm of external diameter, and namely the radial width of fiber interferometer is 0.5cm.The internal diameter of annular groove is 18cm, and external diameter is 21cm;
Unlined aluminium foil paper layer 9 and outer foil ply of paper 1 thickness are 0.04cm;
The first composite ceramic adiabatic coating layer 8 and the second composite ceramic adiabatic coating layer 4 thickness are 0.4cm;
The thickness of the one DOK polyester glass medium flaggy 7 and the 2nd DOK polyester glass medium flaggy 5 is 0.35cm;
Heat-insulating material layer 3 thickness are 2cm;
Foamed rubber-plastic heat insulation material layer 2 thickness are 0.9cm.
The present embodiment is similar to Example 3, distinguishes only to be, the internal diameter of described fiber interferometer 11 is 19.8cm, and external diameter is still 20cm, and namely the radial width of fiber interferometer is 0.1cm.
Claims (10)
1. passive phase compensation structure of full optical fiber interferometer, it is characterized in that, comprise that inside offers the foamed rubber-plastic heat insulation material body (10) of annular groove, accommodate the fiber interferometer (11) that is turned to by full optical fiber interferometer in described annular groove, the outer unlined aluminium foil paper layer (9) that is enclosed with successively of described foamed rubber-plastic heat insulation material body (10), the first composite ceramic adiabatic coating layer (8), the one DOK polyester glass medium flaggy (7), special polyurethane high molecule sound-absorbing insulation material layer (6), the 2nd DOK polyester glass medium flaggy (5), the second composite ceramic adiabatic coating layer (4), heat-insulating material layer (3), foamed rubber-plastic heat insulation material layer (2) and outer foil ply of paper (1), be used for being connected to the optical fiber (A of external signal input and output on described full optical fiber interferometer, B) pass from layers of material.
2. the passive phase compensation structure of full optical fiber interferometer according to claim 1, is characterized in that, the internal diameter 〉=9cm of described fiber interferometer, and external diameter≤20cm, the radial width scope of described fiber interferometer is 0.1-0.5cm; The internal diameter of described annular groove is less than the internal diameter of fiber interferometer, and external diameter is greater than the external diameter of fiber interferometer.
3. the passive phase compensation structure of full optical fiber interferometer according to claim 1, is characterized in that, foamed rubber-plastic heat insulation material layer (2) thickness range is 0.5-1cm; The wet resistance factor mu of described foamed rubber-plastic heat insulation material body (10) and foamed rubber-plastic heat insulation material layer (2) 〉=10000, coefficient of heat conductivity λ≤0.034W/ (mK).
4. the passive phase compensation structure of full optical fiber interferometer according to claim 1, it is characterized in that, the thickness range of described the first composite ceramic adiabatic coating layer (8) and the second composite ceramic adiabatic coating layer (4) is 0.2-0.4cm, coefficient of heat conductivity≤0.054 W/ (mK).
5. the passive phase compensation structure of full optical fiber interferometer according to claim 1, is characterized in that, the thickness range of a described DOK polyester glass medium flaggy (7) and the 2nd DOK polyester glass medium flaggy (5) is 0.3-0.4cm.
6. the passive phase compensation structure of full optical fiber interferometer according to claim 1, is characterized in that, the thickness range of unlined aluminium foil paper layer (9) and outer foil ply of paper (1) is 0.03-0.05cm, and light reflectivity and heat reflectivity are all greater than 90%.
7. the passive phase compensation structure of full optical fiber interferometer according to claim 1, it is characterized in that, the material of described heat-insulating material layer (3) is aerosil, and coefficient of heat conductivity is 0.013-0.025 W/ (mK), and thickness range is 0.5-2cm.
8. the passive phase compensation structure of full optical fiber interferometer according to claim 1, it is characterized in that, described foamed rubber-plastic heat insulation material body (10) is shaped as rectangular parallelepiped, cylinder or spheroid, and the space between described annular groove and fiber interferometer is filled with aerosil.
9. the method for making of the passive phase compensation structure of described full optical fiber interferometer as arbitrary in claim 1-8, is characterized in that, comprises the following steps:
Step 1 turns to full optical fiber interferometer the fiber interferometer of ring-type, and draws for the optical fiber (A, B) that connects the external signal input and output;
Step 2 is made foamed rubber-plastic heat insulation material body (10), and within it section offer with step 1 in the fiber interferometer shape and the annular groove that is complementary, and fiber interferometer is placed in this annular groove;
Step 3, unlined aluminium foil paper layer on described foamed rubber-plastic heat insulation material body (10) outer wrapping;
step 4, at a DOK polyester glass medium flaggy (7) and the 2nd DOK polyester glass medium flaggy (5) apparent surface's upper coating special polyurethane high molecule sound-absorbing insulation material layer (6), and respectively be coated with on a DOK polyester glass medium flaggy (7) and the 2nd DOK polyester glass medium flaggy (5) another surface and be covered with the first composite ceramic adiabatic coating layer (8) and the second composite ceramic adiabatic coating layer (4), form composite layer, this composite layer is made the first box body, in the shape of this first box body internal cavity and size and step 3, formed structure is complementary, structure in step 3 is placed in the cavity of this first box body,
Step 5 utilizes foamed rubber-plastic heat insulation material layer (2) to make the second box body, the first box body profile coupling in the cavity in the second box body and step 4, and cavity volume is greater than the first box body;
Step 6 is placed in the first box body in the cavity of the second box body, and fills full aerosil form heat-insulating material layer (3) in the first box body and the second box body space;
Step 7: at the second box body outer wrapping outer foil ply of paper (1).
10. method for making according to claim 9, is characterized in that, in described step 2, full aerosil is filled in the space between annular groove and fiber interferometer.
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| CN111998172A (en) * | 2019-05-27 | 2020-11-27 | 北京中创为南京量子通信技术有限公司 | Vibration-damping and heat-insulating device and vibration-damping and heat-insulating optical fiber interferometer equipment |
| US11846574B2 (en) | 2020-10-29 | 2023-12-19 | Hand Held Products, Inc. | Apparatuses, systems, and methods for sample capture and extraction |
| CN113572532B (en) * | 2021-04-14 | 2022-06-28 | 华南师范大学 | Active phase compensation method and device for optical fiber interference ring and quantum key distribution system |
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| CN1055061A (en) * | 1990-03-19 | 1991-10-02 | 伊莱利利公司 | Optical fibre interferometric sensor |
| CN101001109A (en) * | 2007-01-11 | 2007-07-18 | 复旦大学 | Method for repressing affect of fibre-optical light path in fibre-optical sensing system by sonic and vibration |
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