CN100399110C - Method for adjusting and firming components built in free space isolator - Google Patents
Method for adjusting and firming components built in free space isolator Download PDFInfo
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- CN100399110C CN100399110C CNB2006100186699A CN200610018669A CN100399110C CN 100399110 C CN100399110 C CN 100399110C CN B2006100186699 A CNB2006100186699 A CN B2006100186699A CN 200610018669 A CN200610018669 A CN 200610018669A CN 100399110 C CN100399110 C CN 100399110C
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- 239000000919 ceramic Substances 0.000 claims abstract description 24
- 229910052573 porcelain Inorganic materials 0.000 claims description 64
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Abstract
The present invention discloses a method for adjusting and firming devices arranged in a free space isolator. In the method, a ceramic supporter is made of zirconium dioxide ceramics, and the devices arranged in an isolator are fastened in the ceramic supporter according to a special technology and are fastened with a magnetic ring. The present invention greatly increases the good rate of the free space isolator, increases the stability of free space isolator products, enhances the index performance of the free space isolator and greatly lowers the manufacturing cost of a whole light isolator.
Description
Technical field
The present invention relates to optical communication passive device field, specifically, is the method for producing the low-loss band porcelain plate of a kind of high-isolation free space isolator.
Background technology
Along with the competition of communications equipment market constantly heats up, users press lower and lower to the price of device, and this has brought great pressure for optical device manufacturer, their further cost squeeze when guaranteeing initial quality of having to.Concerning optoisolator manufacturer, especially like this, be reduced to 15 dollars of today more than 100 dollars by original such as the price of free space single-stage optoisolator.
In order to reach so low cost, manufacturers have to make an issue of on the material supplies chain with all strength, and gradually a large amount of production runes are transferred to the lower area of some labor costs, yet these effort at most also can only be reduced to the cost of optoisolator about 15 dollars, and present production technology has determined its cost not fall again.Therefore want with cost near 10 dollars this below threshold, solve the one-time success rate raising of direct material cost reduction, product and the problems such as reduction of fraction defective with regard to adopting a kind of brand-new manufacture method.
The built-in components and parts of free space single-stage optoisolator in the market are made up of three elements usually: two polarizers, a Faraday polarization apparatus.Two polarizers are clipped in the middle Faraday polarization apparatus and form a three-decker, and Faraday polarization apparatus is determined input and output polarization state of light direction.Because its intrinsic polarization sensitivity, this optoisolator applies to the output terminal of fixed polarisation state light source usually.
Faraday polarization apparatus is directly proportional with its thickness to the anglec of rotation of polarization state.The Faraday polarization apparatus that is used for communication wavelengths 1310nm, 1550nm is made by the rare-earth garnet film usually, these garnet film thicknesses are at 250 microns～500 microns, and need in being full of the environment in magnetic field, work, because most communications applications all requires an operating temperature range than broad, and this garnet material exactly can satisfy this requirement well, therefore obtained using very widely, though its demand to magnetic field makes the whole design more complicated that becomes.At present, the magnet ring that general employing samarium-cobalt material is made is kept in magnetic field, is commonly referred to magnet ring, generally adopts the powder die-casting mode to make, and is frangible and thermal expansivity is very low.
Advance the light side and the bright dipping side adds a polarizer respectively garnet, just can form a light valve door, make the light only can be along a direction transmission.The principle that the common polarizer of using in the communication system optical transceiver all is based on the metal material resonance absorption is determined the transmission polarization state, it is very perfect that this technology all is considered in the past few decades, and these polarizers are cheap, transmittance 〉=98%, extinction ratio 〉=10,000: 1.
Yet regrettably, there are a lot of drawbacks in traditional processing technology and method: in the traditional handicraft, adopt manually under microscopy environment each sheet of three layer elements directly is anchored among the magnet ring with the 353DN colloid successively, its drawback is: because the expansion coefficient of garnet and magnet ring is different, when high temperature heats, after the dislocation of expanding colloid obscission and light path shift phenomenon will appear; Because the edge of three layer elements is sealing not, then directly cause dust, colloid or in order to the solvent that cleans along the edge endosmosis and can't clean, thereby glue appears easily climbing, insert problems such as loss is big; Because light has error on the anglec of rotation and the polarizer polarization direction after by faraday's revolving fragment, under this traditional handicraft, can't imitate standard, it is far away thereby the light path skew to occur, the maximum isolation wave length shift is excessive, isolation is not high in the wavelength coverage that the 3G system requirements is set, insert loss and become big phenomenon, so bad mortality is often more than 50%.Producer is then arranged through technological transformation abroad, the mode of employing metal fixing is carried out the components and parts of fastening isolator, and carry out index with the method that promotes the metal fixing rotation and imitate accurate, obtain certain effect, but its drawback is: because metal fixing structural design defective causes and must glue and make light path that glue be arranged in the polarizer bottom surface; Because the distinctive magnetic conductivity of metal material often causes magnetic fluxes to change over time, product plays pendulum; Because the susceptibility-to-corrosion of metal, if cause isolator or with the active device of this kind isolator processing when being in the rugged surroundings for a long time, metal fixing is prone to corrosion, causes self-pollution source pollution in the device; Because the magnetic of metal band itself, thus the production operation error usually appears in process of production, thus do not reach desirable index, increased the generation of fraction defective; Owing to still do not consider slit between polarizer and the faraday in this technology, thus the pollution that the insertion loss objective of finished product brought along with the time and the problem that progressively increases, and easily climb the glue problem in the production run, so still not raising in this regard; Because the metal fixing size that adopts in this technology is too little, outer dia is 2.50mm only, and complex structure is so processing is very difficult.Often still there is burr in the finished product of fixture, and can't steady smooth rotation between the magnet ring, so can not accomplish accurate to imitate accurately by hand, just can not satisfy client's demand on the index; Because metallic steel holder material expensive is undersized, structure extremely complexity is difficult to processing, so starting material can't be purchased and be processed at home, all relies on import at present, makes cost up.
The isolator that present existing mode is produced is all because its drawback and limitation can't normally be used in the production of active device in the 3G system, as mandatory use, the consequence of bringing has the active device more than 50% serious jitter phenomenon to occur and cause the flatness of total system and linearity not to satisfy the demands often under hot environment.
Summary of the invention
The objective of the invention is to solve the drawback of prior art, a kind of acceptance rate that increases considerably free space isolator is proposed, increase the stability of free space isolator product, improve the index performance of free space isolator, manufacturing cost and raw materials cost are all reduced greatly, thus the new manufacture method that the cost of overall optical isolator is minimized.
For realizing this purpose, the present invention adopts zirconia ceramic as porcelain plate of made, it is characterized in that: at first zirconia ceramic assembly material is authenticated, select for use and satisfy composition requirement: 95%ZrO
2, 5%Y
2O
3Density requirements:＞6.05g/cm
3Hardness requires:＞87HRA; Thermal expansivity requires: 9.6 * 10
-6Elastic modulus: 200～250Gpa; Fracture toughness: 1/28Mpam; Bending strength:＞1150Mpa; Crystallite dimension requires:＜0.6 μ m; Thermal conductivity: 2.5W/mK; Bore area smooth finish Ra 0.1, outside surface smooth finish Ra 0.2, the hollow bar-shaped zirconia ceramic material of concentricity Ф 0.01mm condition; Second step was cut into the little ring rod of 0.7 millimeters long with ceramic component, and cut out one 0.1 ± 0.01 mm wide retraction slot at the hollow bar side, required the level and smooth horizontal non-notch of any otch, and it is stand-by to form porcelain plate; The 3rd step is under microscopy environment, one 0 degree polarizer and Faraday polarization apparatus is closely linked forms a double-layer structure, Faraday rotator plane and porcelain plate otch flatly are positioned in the porcelain plate foremost, with optic-solidified adhesive four angles of components and parts are fixed, make its plane and porcelain plate otch flatly be positioned over rearmost end in another porcelain plate another 45 degree polarizer,, stand-by with optic-solidified adhesive to the polarizer Corner Strapped; It is in 1.5 centimetres of magnet rings that the 4th step will be positioned over length with the porcelain plate of being with polarizer with the porcelain plate of polarizer and Faraday polarization apparatus, determine input and output polarization state of light direction, by collimating apparatus and spectrometer monitoring promotion porcelain plate shrinkage joint it is smoothly rotated to an angle and carry out craft effect standard, monitor control index is reached normally require maximum isolation degree wavelength coverage and the minimum exhaustion range that inserts, use four limits of photocuring colloid glue inside back cover layer structure then; The 5th step is optional balance 4 points between porcelain plate and magnet ring, and the 353ND colloid is fastening on the point.Send the baking of progressively heating in 35 degrees centigrade～110 degrees centigrade of the hot environments, reach best fastening shape to the 353ND colloid; Mark incidence surface, exiting surface after the last test, and the accurate value of spectra re-recorded characteristic, maximum isolation degree wave length shift, insert loss, specification product index standard value be isolation greater than 55dB, insert loss less than 0.25dB, wavelength coverage be claimed range ± 5nm.
Compared with prior art, the present invention has the following advantages: adopted a large amount of now very common zirconia ceramic assemblies that use, simple in the processing, intensity is high, and cost is extremely low, than adopting metal immobilization material cost to descend about 15 times.And be convenient to buying, easy to use, inner face is smooth, does not damage diaphragm; In traditional handicraft, generally do not adopt the holder part, perhaps adopt the metal holder, brought great puzzlement for production and quality, the inventor adopts the very low zirconia ceramic material of price, through constituting porcelain plate, though simple in structurely solved effectively that magnetic flux is steady, fastening firmly, light path does not have problems such as glue to being designed to not closed ceramic ring after the authentication of its magnetic conductivity, expansion coefficient authentication, tension force authentication, the stress authentication; Because zirconia material density 6.0 is lower than alloy 13.0～15.0, weight is lighter, so easily by colloid in the fastening and magnet ring; Because the zirconia ceramics material of built-in porcelain plate is under bad working environments, wear-resisting anti-, corrosive nature is fabulous, long service life, be existing alloy 3-5 doubly, the life-span of the isolator of finishing with the method is significantly improved; Because this does not contain magnetic and magnetic conductivity as stupalith built-in porcelain plate, to magnetic fluxes without any influence, thereby do not influence attenuation and isolation index, make the index of product own have long-term stability; Low through a large amount of test contrast authentication zirconium dioxide porcelain plate thermal conductivities, expansion coefficient 9.6 * 10
-6Similar to garnet and polarized glass expansion coefficient, and because the porcelain plate tension force that has retraction slot to bring, so the phenomenon that polarizer and faraday rotator wherein come off out from the isolation of finished product free space high low temperature in high-temperature baking or high low temperature aging or the physical environment can not occur and change the time; Because built-in porcelain plate has opaqueness originally as stupalith,, can prevent that the colloid that occurs in the high-temperature baking from shrinking obscission so it is fastening to adopt the solid colloid of ultraviolet to carry out; Because the inventor has opened a retraction slot in this porcelain plate side, make and itself possess certain force of strain, through overtesting authenticate its tension force can effective fastening porcelain plate and magnet ring between, make obstructed light in its gap and combination closely firm, and can effectively eliminate the stress that expands with heat and contract with cold and bring, prolong porcelain plate serviceable life.Shrinkage joint has solved manual problem of imitating accurate center of effort simultaneously; Owing to adopt built-in porcelain plate, and zirconia ceramics material hardness height can guarantee that it is worked into the needed smooth precision of selection, high slickness can both be accomplished to require in interior outside, so production operation has had an accurate platform of stable effect, thereby solved manual uncertainty and inefficiency problem of imitating in the standard in magnetic field environment, it is once successful to accomplish that 97% above light path does not have glue, also improved simultaneously the manual accurate index of imitating, process is to the test of the band porcelain plate free space isolation of output, 99% can reach isolation greater than 55dB in the product, insert loss and can be reduced to 0.25dB, wavelength coverage can be controlled in claimed range ± 5nm, thereby solved the problem that active device is shaken in the 3G optical communication system completely under hot environment, make the flatness of total system and the index that linear index reaches the 3G system, and the providing of stable platform porcelain plate, cause production efficiency to be doubled and redoubled.
Description of drawings
Fig. 1 is the structural representation of porcelain plate;
Fig. 2 is the assembly structure synoptic diagram of Faraday polarization apparatus and 0 degree polarizer;
Fig. 3 is the assembly structure synoptic diagram of 45 degree polarizers;
Fig. 4 is the assembly structure synoptic diagram of the isolator of use this method manufacturing;
Fig. 5 is the structural representation of assembling gained finished product.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments: the inventive method adopts zirconia ceramic to be used for firm built in free space isolator polarizer and Faraday polarization apparatus as made porcelain plate 5.At first selection authenticates the material of zirconia ceramic assembly source: require for composition: 95%ZrO2,5%Y2O3; Density requirements:＞6.05g/cm
3Hardness requires:＞87HRA; Thermal expansivity requires: 9.6 * 10
-6Elastic modulus: 200～250Gpa; Fracture toughness: 1/28Mpam; Bending strength:＞1150Mpa; Crystallite dimension requires:＜0.6 μ m; Thermal conductivity: 2.5W/mK; Bore area smooth finish Ra 0.1, outside surface smooth finish Ra 0.2, the hollow bar-shaped zirconia ceramic material of concentricity Ф 0.01mm is assert qualified available.Make porcelain plate then, ceramic component is cut into the little ring rod of 0.7 millimeters long with the high-strength diamond cutter, and cut out one 0.1 mm wide retraction slot at the hollow bar side, require the level and smooth horizontal non-notch of any otch, the porcelain plate that is firm isolator components and parts 5 that obtains.Be the assembling of assembly afterwards, under microscopy environment, one 0 degree polarizer 2 and Faraday polarization apparatus 3 are closely linked, forming a double-layer structure is positioned in the porcelain plate 5 foremost, make Faraday rotator 3 planes and porcelain plate 5 otch levels, four angles of components and parts are fixed, another 45 degree polarizer 4 is positioned over rearmost end in another porcelain plate 5 with optic-solidified adhesive, make its plane and porcelain plate 5 otch levels, with optic-solidified adhesive to the components and parts Corner Strapped.This procedure key is two sub-level problems, in case out-of-level, can cause light path skew or bring the sealing difficulty in the next process slit between the sealing Faraday rotator 3 and polaroid and do not reach the effect of dustproof and waterproof.In general, the selection of porcelain plate has determined that its toughness is fabulous, be difficult for breaking, through overstress testing, Faraday rotator 3 or polarizer are implanted pottery holder 5 o'clock, the suffered maximum stress of pottery holder 5 is less than 100MPa, be scaled the resistance to compression load, be equivalent to the load that porcelain plate 5 is subjected to 2kg, be significantly smaller than resistance to compression load 10 that general ceramic porcelain plate 5 can bear to 25kg, be Faraday rotator 3 or polarizer 2,4 is normal when implanting ceramic component or generally can not cause the breakage of ceramic component when elevated temperature heat rises, but when ceramic component is subjected to the concentration of local load,, can't produces plastic yield and offset the stress that is produced and concentrate because zirconia ceramic is hard brittle material, porcelain plate 5 will be subjected to very big local stress, thereby cause that porcelain plate 5 destroys.We obtain when the end is subjected to the 2kg load in test, and porcelain plate 5 will be subjected to the stress of 2.04Gpa, be equivalent to be subjected to the normal pressure of about 45kg, be much higher than the intensity of zirconia ceramic, cause the breakage of porcelain plate 5.Therefore, implant pottery holder 5 o'clock, answer careful operation, make porcelain plate 5 not be subjected to stress raisers as far as possible at Faraday rotator 3 or polarizer 2,4.The interior hole dimension of ceramic component has considerable influence to porcelain plate 5 suffered stress, is satisfying under the prerequisite of clear aperature, should select big porcelain plate diameter of bore as far as possible, to reduce porcelain plate 5 suffered stress.After tested when Faraday rotator 3 or polarizer 2,4 diagonal distance is increased to 1.26mm and implants porcelain plate 5, when porcelain plate 5 diameter of bores are 1.25mm, assembly is subjected to the stress of about 196MPa, still less than the intensity of ceramic component, therefore also can adopt Faraday rotator 3 or the polarizer 2 of diagonal distance 1.25mm, 4 implant-40 degrees centigrade～+ 110 degrees centigrade high low temperature cyclic tests in back, the intensity of check porcelain plate 5, carry out warranty test, with behind the Faraday rotator 3 of guaranteeing to implant diagonal distance 1.24mm or the polaroid under 110 celsius temperature situations, the destruction that produces the static fatigue that can not resist do not appear and in porcelain plate 5.It then is the assembling of magnet ring 1, band polarizer 2 and the porcelain plate 5 of Faraday polarization apparatus 3 and the porcelain plate 5 of band polarizer 4 are positioned in 1.5 centimetres of magnet rings 1, determine input and output polarization state of light direction, by collimating apparatus and spectrometer monitoring promotion porcelain plate 5 shrinkage joints it is smoothly rotated to an angle and carry out craft effect standard, monitor control index is reached normally require maximum isolation tolerance wavelength coverage and the minimum exhaustion range that inserts, then with four limits of photocuring colloid glue inside back cover layer structure to reach sealing effectiveness, play the effect of dustproof and waterproof in the crack in the three-decker.Be that porcelain plate 5 is fixing again, optional balance 4 points between porcelain plate 5 and magnet ring 1, the 353DN colloid is fastening on the point.Send the baking of progressively heating in 35 degrees centigrade～110 degrees centigrade of the hot environments, reach best fastening shape to the 353DN colloid.Be test and mark at last, test back mark incidence surface, exiting surface, and spectra re-recorded characteristic, the accurate value of maximum isolation degree wave length shift, insert loss, specification product index standard value is that isolation is greater than 55dB, insert loss less than 0.25dB, wavelength coverage be claimed range ± 5nm.
Claims (2)
1. the method for adjustment and firming components built in free space isolator, its adopts zirconia ceramic as a porcelain plate of made (5), it is characterized in that it comprises following processing step:
The first step authenticates selection to zirconia ceramic assembly material, selects for use and satisfies composition requirement: 95%ZrO
2, 5%Y
2O
3Density requirements:＞6.05g/cm
3Hardness requires:＞87HRA; Thermal expansivity requires: 9.6 * 10
-6Elastic modulus: 200～250Gpa; Fracture toughness: 1/28Mpam; Bending strength:＞1150Mpa; Crystallite dimension requires:＜0.6 μ m; Thermal conductivity: 2.5W/mK; Bore area smooth finish Ra 0.1, outside surface smooth finish Ra 0.2, the hollow bar-shaped zirconia ceramic material of concentricity Φ 0.01mm condition;
Second step, ceramic component is cut into the little ring rod of 0.7 millimeters long, and cuts out one 0.1 mm wide retraction slot at the hollow bar side, the level and smooth horizontal non-notch of each otch, it is stand-by to form porcelain plate (5);
The 3rd step, under microscopy environment, one 0 degree polarizer (2) and Faraday polarization apparatus (3) are closely linked, forming a double-layer structure flatly is positioned in the porcelain plate (5) foremost Faraday polarization apparatus (3) plane and porcelain plate (5) otch, four angles of components and parts are fixed, make its plane and porcelain plate (5) otch flatly be positioned over rearmost end in another porcelain plate (5) another 45 degree polarizer (4), to the components and parts Corner Strapped, stand-by;
The 4th step, to be positioned in 1.5 centimetres of magnet rings (1) with polarizer (2) and the porcelain plate (5) of Faraday polarization apparatus (3) and the porcelain plate (5) of band polarizer (4), determine input and output polarization state of light direction, by collimating apparatus and spectrometer monitoring promotion porcelain plate (5) shrinkage joint it smoothly being rotated to an angle carries out craft effect standard, seals four limits of three-decker then; The 5th step optional 4 of balances between porcelain plate (5) and magnet ring (1) are fastening;
The 5th step, test back mark incidence surface, exiting surface, and spectra re-recorded characteristic, the accurate value of maximum isolation degree wave length shift, insert loss, specification product index standard value is that isolation is greater than 55dB, insert loss less than 0.25dB, wavelength coverage be claimed range ± 10nm.
2. the method for a kind of adjustment according to claim 1 and firming components built in free space isolator, it is characterized in that: fixedly porcelain plate (5) is selected ultraviolet cured adhesive for use with each assembly and interior each assembly of porcelain plate (5), fixedly porcelain plate (5) and magnet ring (1) are selected the 353DN colloid for use, send hot environment progressively to heat for 35 degrees centigrade～110 degrees centigrade after fixing to be baked to the 353DN colloid to reach best tightening state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100186699A CN100399110C (en) | 2006-03-30 | 2006-03-30 | Method for adjusting and firming components built in free space isolator |
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|---|---|---|---|
| CNB2006100186699A CN100399110C (en) | 2006-03-30 | 2006-03-30 | Method for adjusting and firming components built in free space isolator |
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| CN1851533A CN1851533A (en) | 2006-10-25 |
| CN100399110C true CN100399110C (en) | 2008-07-02 |
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| US6770223B1 (en) * | 2002-12-13 | 2004-08-03 | Integrated Photonics, Inc. | Article comprising a faraday rotator that does not require a bias magnet |
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| CN1213318C (en) * | 2002-04-09 | 2005-08-03 | 奥普林克通信公司 | Small sized optical fibre circulator |
| US6770223B1 (en) * | 2002-12-13 | 2004-08-03 | Integrated Photonics, Inc. | Article comprising a faraday rotator that does not require a bias magnet |
| US20050111073A1 (en) * | 2003-11-20 | 2005-05-26 | Lightwaves 2020, Inc., Corporation Of California | Integrated variable optical attenuator and related components |
| CN2702335Y (en) * | 2004-05-24 | 2005-05-25 | 昂纳信息技术（深圳）有限公司 | Tail fiber type optical isolator |
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| Monolithically Integrated Isolators Basedon Nanowire-Grid Polarizers. JIAN JIM WANG ET AL.IEEE PHOTONICS TECHNOLOGY LETTERS,Vol.17 No.2. 2005 * |
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| Publication number | Publication date |
|---|---|
| CN1851533A (en) | 2006-10-25 |
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