CN1192277A

CN1192277A - 36 fiber MAC II chip

Info

Publication number: CN1192277A
Application number: CN96196013A
Authority: CN
Inventors: 理查德Z·詹姆罗兹齐兹克; 特洛伊·保罗·米利恩
Original assignee: Connector Systems Technology NV
Current assignee: Connector Systems Technology NV
Priority date: 1995-07-28
Filing date: 1996-07-24
Publication date: 1998-09-02
Also published as: KR19990035983A; EP0850432A1; EP0850432A4; WO1997005512A1; JPH11510270A

Abstract

Disclosed is a multifiber optical cable array connector (196) which includes a central block (204) having a plurality of bores that is made up of a lower chip (208) having v-grooves (210) on its upper surface and an upper chip (206) having v-grooves (210) on its lower surface which is superimposed over the lower chip to form the bores. An optical fiber ribbon cable (230) has its insulation (232) removed and the fibers are inserted through every other bore in the block (204). A second optical fiber ribbon cable (216) similarly has its insulation (218, 220) removed at one end and is superimposed over the first ribbon cable (230) with its fibers being inserted through the remaining bore. Because of this construction, substantial numbers of fibers may be received in this connector (196).

Description

The MACII type light path sheet of 36 optical fiber

The present invention relates to the joints of optical fibre, more particularly, relate to the light path sheet that is used to connect optical fiber ribbon cable.

When fiber optics appearred in the mid-1970s, engineers was once brought up to 45Mb/S to message transmission rate on 24 optical fiber that use the independent joints of optical fibre.After 20 years, 16Gb/S can be transmitted in a kind of parallel connected array system of 32 fibers, is used for the computer technology of the very fast transfer rate of needs; This system is better than coaxial system on capacity and length.Some array technique companies and financial group form fiber array in parallel technology company gradually.This company comprises photoelectric technology affiliated company (OETC), and it is by AT﹠amp; T, IBM, companies such as Honeywell and Martin Marietta form.

OETC group has developed a kind of optical link of 32 passages, and it adopts some new encapsulation technologies, is used for equipment and optical fiber.The transmitter and receiver assembly is designed to: eliminate optical fiber pigtail by being directly connected to the fiber optic cable assembly.By between fiber, keeping less spacing, make fibre density increase in equipment, connector and the optical cable.Developed the new test routine that some are used for 18 optical fiber test units, to develop 32 new fiber optic cables.The MACII of higher density in the AN connector shell (the comprehensive purposes optical cable of II type) can keep the compatibility of existing connector construction.

Conventional MACII arranges and comprises 18 and 32 fiber light path sheets.The light path sheet of 18 fibers is settled according to 250 microns fiber core, because the structure of fiber can be with the higher density of single size restriction under the situation of MACII hardware.Ribbon fiber (fiber core/covering/cushion in micron is of a size of 62.5/125/250) is settled abreast with single file.When 18 fibers became band with an individual layer, 18 * 1, mode from the cushion to the cushion, fiber core needed 250 microns interval, because cushion is being controlled linear configurations.In when assembling, remove 9.5 millimeters cushioning layer material from fibre end, to expose 125 microns covering.Though the MACII type light path sheet of 18 fibers is settled the optical fiber of 125 micron diameters, the cushion of 250 micron diameters makes the distance of 250 microns of these optic fibre separations, in OETC, makes MACII type standardized component with a kind of light path chip architecture of 32 fibers.In the light path sheet of 32 fibers, settle a kind of 62.5/125/135 optical fiber according to 140 microns fiber core, to improve its density.To understand below, can be used for the fiber shown in Figure 35 a with reference to the disclosed preferred groove size of Figure 36-38a, and these sizes of scalable, to be used for the bigger fiber shown in Figure 38 b.

In connector of the present invention, form a central block by a last light path sheet and a following light path sheet, wherein each light path sheet all has a plurality of cannelures, and the groove of these grooves and another light path sheet forms a plurality of fiber receiver holes in the piece jointly.Last light path sheet overlaps on following light path sheet, connects them with a kind of bonding agent or similar approach.Take out insulating material from an optical fiber ribbon cable, and its is inserted in the following light path sheet every a V-shaped groove.Second optical fiber ribbon cable overlapped on first optical fiber ribbon cable, take out its insulating material, inserting in the remaining V-shaped groove from all optical fiber of wearing cable on this.Can specific receive more optical fiber effectively in the light path sheet a pair of with this structure, it is desirable for example receiving 16 to 36 optical fiber, and 36 optical fiber are preferable.

Further describe connector of the present invention and method with reference to the accompanying drawings, in the accompanying drawings:

Fig. 1 schematically illustrates an OETC system, wherein can use connector of the present invention;

Fig. 2 illustrates that schematically one has the VCSEL of receiver components and the side view of array block;

Fig. 3 is a cross-sectional view that can be used for the optical fiber of connector of the present invention and method;

Figure 4 and 5 are longitudinal sections of optical fiber, are used for illustrating the theoretical principle that constitutes connector of the present invention and method basis;

Fig. 6 and 7 is cross-sectional views of optical fiber ribbon cable, and this optical fiber ribbon cable can use with method with connector of the present invention;

Fig. 8-the 17th, various vertical figure of the joints of optical fibre and a stereographic map illustrate the various principles that constitute the inventive method and equipment;

Figure 18 is the longitudinal section of the SC joints of optical fibre of a routine, is used to understand connector of the present invention and method;

Figure 19 and 20 is the end-views that can be applicable to the multifilament array connector of the inventive method, and the spacing from the fiber core to the fiber core is described;

Figure 21 is a side view that can be applicable to the termination optical conenctor of the inventive method;

Figure 22 is a longitudinal section of optical fiber, is used for schematically illustrating the ultimate principle of connector of the present invention and method;

Figure 23-34 schematically illustrates the various test routines that can be applicable to the inventive method;

Figure 35 a and 35b are the cross-sectional views that can be applicable to the optical fiber of connector of the present invention;

Figure 36 is the upper viewing view of a preferred embodiment of connector of the present invention;

Figure 37 is the side view at connector shown in Figure 36;

Figure 38 a is the end-view at connector shown in Figure 36; With

Figure 38 b is the end-view of a conventional connector; In the practical application of the inventive method, this routine connector can use together with connector shown in Figure 36.

Referring to Fig. 1, the basic element of character that relates in optical data communication system comprises a transmission Machine, optical cable 12 and a receiver 18 with connector 14 and 16. The transmitter handle The signal of telecommunication becomes optical signal, and optical signal propagates into receiver by optical cable. Receiver becomes optical signal Become the signal of telecommunication. The joints of optical fibre in this system be between transmitter and receiver, install easily and Regulate.

Transmitter becomes optical signal to the signal of telecommunication by laser diode. Conventional equipment seals laser instrument Be contained in the shell, this shell is contained on the substrate. Substrate limitations in density number of lasers. Referring to Fig. 2, a vertical cavity surface emitting laser (VCSEL) shown in the figure, it swashs each Optical diode is packaged into an independent module package and preserves substrate space. This equipment comprises one 20 and labels of light emitting diode (LED) be 22 usually with the optical fiber array shown in the part The row piece. Optical fiber array block comprises that one is shown with part 26 with the optical fiber shown in the part 24 and one The multifiber array connector that goes out (MACII type) light path sheet. OETC sender module handle No. 32 vertical cavity surface emitting lasers are encapsulated in the independent module. Each laser instrument handle Inject in the optical fiber array block to laser vertical. The rear portion 27 of optical fiber array block is with 45° angle polishing and plating Gold is in order to reflex to the light that penetrates from VCSEL the optical fiber.

Receiver becomes electric signal to light signal.Conventional apparatus is encapsulated in receiver in the shell, and this shell is contained on the substrate.Substrate limitations in density receiver module capacity.OETC group has designed a kind of detecting device/array acceptor of 32 channels, wherein 31 data channels and 1 clock channel.The array acceptor equipment class is similar to source device, and the optical fiber array block of gold-plated 45 ° of relief angles is housed, so that the light that enters optical fiber is reflexed to each detecting device at 140 microns centers.Optical fiber link is made up of the cable assembly that has the optical connector that is terminated at two cable end, is used for transmitter is connected to receiver.Simple optical fiber or multifiber all can form optical fiber link.

Referring to Fig. 3, optical fiber is made up of three critical pieces that form an independent unit.Inner part is called fiber core 28, is the second layer 30 that is called covering around it.In order to avoid destroy element, just add cushioned material layer 32 one by one in order to protect fiber core and covering.Fiber core and clad material provide the medium of transmitting optical signal.Optical fiber is with size, type and mode volume classification.Fiber size is made up of two numerals, and their representatives are in the fiber core and the cladding diameter of micron.One 62.5/125 optical fiber means 62.5 microns fiber cores that centered on by 125 microns coverings.Third digit is represented the diameter in the protective seam that is called cushion of the topped involucrum of micron.The diameter of fiber core, covering and cushion changes according to its performance requirement dimensionally with in the configuration.Following table 1 illustrates the most frequently used size emphatically.

Table 1 is used fiber size always

Size is used

8/125/250 monotype

8/125/500

8/125/900

50/125/250 multi-mode

50/125/500

50/125/900

62.5/125/250 multi-mode

62.5/125/500

62.5/125/900

100/140/250 multi-mode

100/140/500

100/140/900

Referring to Fig. 4-5, illustrate and a kind ofly have a fiber core 28 and a covering 30 but do not have the optical fiber of topped material layer.Follow Snell's law, promptly to the law of the material of high index refraction, light reflects with cladding between the restraining barrier at fiber core along optical fiber.As shown in Figure 4, in optical fiber, light is refracted and enters fiber core, because the refractive index of fiber core is greater than the refractive index of covering.Referring to Fig. 5, can find out that specifically in order to keep internal reflection, light must enter fiber core with critical angle A, promptly light can not reflect and enter fiber core.

Referring to Fig. 6, fiber array comprises one often with the fibre ribbon of label 34 expressions, and fibre ribbon 34 has the multifiber by the single file align with 36,38 and 40 expressions.Because the transfer of the diameter of optical fiber decision from the fiber core to the fiber core is so the diameter of the optical fiber that adds up can draw the width of optical fiber.Fibre ribbon also comprises a sheath, and often with numeral 42 expressions, sheath 42 comprises a master tape cushion 44 and one band cushion 46.Band structure of optic fibre can be protected and keep to sheath.The tensile load that is added on the optical fiber can make the negative performance characteristic of generation in the optical fiber.Reinforcement around the fibre ribbon sheath can make optical fiber alleviate those tensile loads from outside leading in cable.

Referring to Fig. 7, another optical fiber ribbon cables with 48 expressions are shown often so that its overcoat 50 to be described.As optical fiber ribbon cable 34, optical fiber ribbon cable 48 comprises 52, one master tape cushions 54 of multifiber and optical cable cushion 56 that is positioned at central authorities.Optical fiber ribbon cable 48 also comprises a reinforcement 58, the KEVLAR product that reinforcement 58 is preferably bought from company of Du Pont (Dupont), and it is inserted between overcoat and the optical cable cushion.Overcoat provides environmental protection to optical fiber ribbon cable and reinforcement.Lagging material is different with application, but pliable and tough plastics are the most frequently used materials.The chemical property of plastics can change, and lays technical conditions and requirement with plenum ventilation to satisfy vertical tube.

In the long distance applications of a few km band of needs cable, setter can make the decay minimum on the band cable total length with series system connecting band cable for good and all.Band cable and joint fuse and do not interrupt.Optical connector provides another kind of permanent joint, makes setter can change or change the band cable at any time and installs.The above-mentioned joints of optical fibre are designed to, and have both connected two optical fiber, make interconnection loss minimum again.Intrinsic loss and extrinsic loss are two kinds of main losses of above-mentioned interconnection loss.It is irregular that the intrinsic loss results from fibre geometry, comprises that the diameter of numerical aperture (light acceptance angle) and fiber core and covering is unworthy of, concentricity and ovality.Referring to Fig. 8, illustrate that numerical aperture is unworthy of caused loss, first optical fiber with fiber core 62 and covering 64 attempts to aim at second optical fiber with fiber core 68 and covering 70 among the figure.Can find out, have the intrinsic loss in this configuration, this is not matched by light acceptance angle b between optical fiber 60 and the optical fiber 66 and c to cause.Referring to Fig. 9, optical fiber 72 has large diameter fiber core 74 and covering 76.Optical fiber 78 has the fiber core 80 and the surrounding layer 82 of minor diameter.Because this core diameter does not match, and can produce the intrinsic loss yet.Referring to Figure 10, optical fiber 84 has fiber core 86 and surrounding layer 88.The optical fiber 90 that is positioned has the fiber core 92 of the diameter identical with fiber core 86.Yet the surrounding layer 94 of optical fiber 90 has the diameter greater than the covering 88 of optical fiber 84, thereby also produces the intrinsic loss.Referring to Figure 11, a kind of optical fiber 96 is shown, it has an oval-shaped fiber core 98 and a covering 100.This fiber core ellipse also can produce the intrinsic loss.Referring to Figure 12, the situation of a speciogenesis intrinsic loss is shown: optical fiber 102 has the fiber core 104 of round section, but has elliptoid covering 106.Referring to Figure 13, the situation of another intrinsic loss is described: though optical fiber 108 has the fiber core 110 of round section and the covering 112 of round section, fiber core and covering decentraction.Referring to Figure 14, a kind of situation that produces extrinsic loss is described: the optical fiber 114 with fiber core 116 and covering 118 is at horizontal misalignment optical fiber 120, and optical fiber 120 has the fiber core 122 and the covering 122 of lateral runout optical fiber 114.Especially find out the center line 128 1 segment distance X of center line 126 stray fiber 120 of optical fiber 114.Referring to Figure 15, have corresponding to the fiber core of optical fiber 130 and the optical fiber 133 of covering though there is the optical fiber 130 of fiber core 131 and covering 132 to aim at, a segment distance Y is departed from the end of optical fiber 130 and optical fiber 133.Thereby also produce extrinsic loss.Referring to Figure 16, also produce a kind of situation of extrinsic loss: 140 1 angle Z of optical fiber 134 stray fiber of fiber core 136 and covering 138 are arranged, and optical fiber 140 has corresponding to the fiber core of optical fiber 134 and covering.Referring to Figure 17, another example of extrinsic loss factor is shown: wherein optical fiber 142 has an end that has rough surface 144.The extrinsic loss factor of considering at the connector design time comprises lateral excursion, end separating, angular error, and surface finish.The finishing stage that cable assembly is made is depended in end separating and surface finish.

Referring to Figure 18, SC joints of optical fibre are shown.This connector comprises 148, one rear casings 150 of 146, one front casings of a coupling unit and a boot 152.Coupling unit 146 also comprises 155 and clamp rings 156 of 154, one rings of a spring.As regular situation, connector also comprises a sleeve, an insert, main and secondary aligning parts and stress relief parts (all not shown).In independent terminal, sleeve is fastening and lay optical fiber.Insert plays center piece, and sleeve is connected in connector versatilely, keeps coupling mechanism simultaneously and coarse alignment is provided.Insert comprises one usually suitable power is added to spring on the sleeve.Coupling mechanism is connected to connector and cable assembly in abutting connection with optical connector, adapter or parts.The stress relief parts are fixed to the optical cable reinforcement on the connector assembly, and do not disturb the flexible connection ability of sleeve.Boot can make the optical cable leading point of optical cable in connector keep minimum bending radius.

Referring to Figure 19, reflect the structure of monofiber connector usually with a preferred multichannel array connector (MACII type) of label 157 expressions, but this array connector is aimed at some type optical fibers that resemble 158 simultaneously in piece 159.MACII type piece is made up of a pair of silicon

light path sheet

160 and 162 that has V-shaped groove; For example 164, the etching V-shaped groove makes it to have the fluid-tight engagement tolerance.These light path sheets sandwich optical fiber with in the epoxy-bonded V-shaped groove.Fixing register pin (not shown) provides from the light path sheet to the light path sheet and from the location of fiber-to-fiber in than deep end groove 166 and 168.The light path sheet can be admitted the optical fiber of 120 to 178 micron diameter scopes, because the diameter of band cable optical fiber is being controlled the spacing of light path sheet.Can understand, as the part of assembling process, whole optical fiber, the optical fiber that example is as shown in table 1 all must be peeled cushion off.18 optical fiber MACII type light path sheets place optical fiber at 250 microns center; The diameter of fibre buffer limits the distance between the optical fiber.

Figure 20 illustrates a kind of normal MACII type connectors with 170 expressions, and it is substantially similar to connector shown in Figure 19, but it is made up of two OETC light path sheets 172 and 174.OETC light path sheet places 140 microns center to optical fiber, so that 32 optical fiber are packed in the MACII type shell of standard.Use a kind of optical fiber of the polyimide coated that needn't peel off.This optical fiber coatings can have been bought from Spectran company by brand name PYROCOAT.Mounted connector is simple on optical cable.The operator is removed to predetermined size to optical cable shell with a pocket knife or exfoliation tool, to expose reinforcement and buffered fiber.Reinforcement is trimmed to the size that needs with the serrate scissors.Use from the brand name of Fujikuta company purchase and shell a layer device, in margin tolerance, peel off cushioning layer material as the optical fiber of HOT JACKET STRIPPER (part number is HJS-01).It is reported, also can use the chemical peeling of equivalence.With the exposed optical fiber of alcohol wash, to remove the impurity that may pollute epoxy resin.Go in the sleeve with a syringe holder epoxy resin.In MACII, epoxy resin adds after inserting optical fiber.Sleeve, insert and male part retaining ring epoxy resins are clean.Optical fiber is to enter sleeve rotationally, finds its route of entry by sleeve diameter.Fibre ribbon is inserted MACII type V-shaped groove.When optical fiber when its front end face stretches out, padded coaming can arrive the bottom at sleeve or piece rear portion.In the end face extending area, epoxy enclosure centers on and supporting end optical fiber.This covers on initial grinding and polishing stage supporting optical fiber.The operator is fixed to optical fiber on the connector with the stress relief parts.Though stress relief parts style is still used crimp and epoxy resin method becoming in most of connector industry.After epoxy resin cure, the operator is optical fiber looking-glass finish smooth finish.The polishing program need be roughly ground to remove epoxy enclosure and fine grinding so that scratch in the glass fibre is reduced to minimum.Last step comprises the end face situation, to remove the pollution from polishing process.Figure 21 illustrates the optical connector of a termination, and at this, the optical fiber that is connected has front casing 178, coupling unit 180 and the epoxy resin 182 of connector with 176 expressions.

The multi-mode cable assembly need insert loss test, and the monotype optical cable then needs to insert loss test and retroreflection test.Used laser signal when the light of interconnection reflection can disturb monotype to use.In the standard of formulating, enumerate other the qualified retroreflection of measuring of various levels with the dB of loss unit.Referring to Figure 22, the optical fiber of aiming at shown in the figure 184 and 186, each optical fiber all have with the fiber core of 188 expressions with 190 coverings of representing, and all are loaded with a signal 192.Retroreflection composition with dotted line 194 expression signals.

Before installing, with standard method test light link.The closed loop loss of optical link and the closed loop loss that test the time does not have optical link when needing compare test, this are arranged.Laser the most frequently used in monotype is used is used, and may need to carry out the retroreflection test.When a signal is run into optical fiber end, may a part of signal reflex return, enter optical fiber.Optics industry circle carries out conventional test according to " fiber optics test routine (FOTP) " of Electronic Industries Association.Routinely, retroreflection test is used for promptly according to FOTP-107 that optical fiber " retroreflection measurement " carries out.FOTP-171 enrolls 4 kinds of methods, is used for main link structure, and is as shown in table 2 below.Method A makes the user can test a link in tandem separately, makes a continuous link miniaturization.Method A limits test for amounting to 10 links.The user adapts to a baseline with a reference link; In link in tandem, comprise optical cable 1.Difference between benchmark and optical cable 1 can be determined the loss of optical cable 1.Optical cable 2 is added on the optical cable 1, and at optical cable 2 measured values and have the loss that difference between optical cable 1 measured value of benchmark can be determined optical cable 2.Method A schematically is shown in Figure 23.Referring to Figure 24, the test design of the B of method shown in the figure, it can measure the loss of identical connector.Optical cable in the test is placed between two benchmark optical cables.The user is having and is not having under the situation of optical cable in the test, relatively the power that sends in the loop.Optical cable in operator's backing propeller test is to measure rightabout performance.From forward with oppositely on average can draw the optical cable decay.Under identical connector end situation, optical cable is counter-rotating easily.Referring to Figure 25, test method C can test different connectors, adapts to two benchmark with two kinds of connectors.Optical cable in the test receives input from benchmark A, but its output will be guided to connector B.When counter-rotating, connector B becomes input, and connector A receives its output.This test unit can be tested optical cable at both direction.Referring to Figure 26, the program of method D can be concentrated monochromatic light cable-end of test by end opposite is directly put into detector probe.Optical cable in the test is placed between benchmark and the detector means.At reference power and have difference between the reference power of optical cable in the test, the loss that can draw optical cable.This program makes the user can test optical fiber pigtail, has the optical cable of independent connector end and the optical cable of fault flash of light problem is arranged.Each end has the faulty link of connector higher loss to be arranged at its fault connector.If method B or C can not detect the loss deviation between the cable end, then method D can amplify loss by all connectors of independent test

Deviation.Figure 27 schematically illustrates this test routine.

Table 2

The method fiber cable type

The A series connection

The B identical connector

The C different connector

D is single-ended

FOTP-107 describes the program of measuring light end face retroreflection feature in detail.This program need be utilized photo-coupler, light source and power meter.Photo-coupler provides a kind of medium, for the usefulness of the more catoptrical power level of operator; Yet optics industry circle has been made reliable retroreflection meter, is used for instead of manual adjusting zero method, retroreflection meter and makes and measure easily and fast, and exempt additional calculating.The retroreflection meter can be used as power meter when the power meter module is housed.Figure 22 schematically illustrates the end face retroreflection of a light signal.

Industrial standard proposes the main points of retroreflections at different levels, to satisfy user's needs.Table 3 is listed the main points of retroreflection performances at different levels.Though the U.S. does not work out its standard as yet, those produce the angle polished end faces of minimum retroreflection loss to be scheduled to remove mark with green.The plane polishing technology results to the polishing of glass surface.A rubber blanket below polished surface can be set up a radius that makes end face physics contact (PC) on end face.Advanced physical contact (SPC) contacts the higher controlling level that (UPC) type is end face preparation in the polishing process with ultra physical.Angle physics contact (APC) is quoted one at the end face angle of not polishing connector, and it is positioned at the key position of connector.This angle, is 8 ° to 12 ° to monofiber connector, and is 5.5 ° to MACII type connector with country and different with manufacturer.

Table 3 end face type and retroreflection performance

The retroreflection of polishing type

Plane＞20dB

PC ＞30dB

SPC ＞40dB

UPC ＞50dB

APC ＞65dB

The utilization of array connector assembly is similar to the insertion loss (FOTP-171) and the retroreflection program (FOTP-107) of single fiber link.Experimental technique is allowed individually or the single optical fiber of hot-wire array side by side.Two kinds of methods all need a reference plate, and this sheet has the independent connector that some branches enter a MACII type assembly, and is schematically illustrated as Figure 28.Manual method needs an independent light source, a power meter and 2 MACII type reference plates.In Figure 29 that an array connector baseline that has independent light source and a power meter is shown, some schematically are shown enter and be merged into the right light emission of MACII type connector separately, these connectors are that branch enters second connector that is coupled in power meter.Optical cable in the test is placed between two reference plates, as among Figure 30 schematically shown in, this illustrates an array connector baseline that has optical cable in the test.Loss measurement comprises that optical cable is measured in reference measurement and the test.Difference from benchmark and test between the optical cable draws the optical cable loss, and is expressed as equation 1.

Loss (dB) benchmark (dBm)-

=measurement (dBm) (1)

Automated process utilizes some single light source and detecting devices of using for single optical fiber.A computer program is progressively measured the power level of benchmark and measurement by the optical fiber of array.The operator only need be installed to optical cable in the test between all reference plates; Remaining test is gone to do by computing machine, comprises and calculates and list tables of data.A different reference plate can be tested the testing equipment greater than 18 port capacities of larger amt.This sheet is divided into two groups of independently connectors to quantity from 32 joints of optical fibre.The operator only tests the first optical fibre set 1-16, and test channel 17-32 not.The software program of testing station is being controlled and is being calculated, to adapt to various density of optic fibre.This program is followed independent optical fiber test method, but tests simultaneously except many optical fiber.Figure 31 schematically illustrates the reference plate that is used for optical fiber 1-16.Optical cable places between reference plate and the detector probe in the test, with measuring optical fiber 1-16, as among Figure 32 schematically shown in.Difference between reference value and measured value is the loss that is used for each optical fiber.The counter-rotating optical cable is to measure rightabout loss.The operator changes benchmark, to measure all the other optical fiber properties.The optical fiber 17-32 of reference plate is connected in some light sources, to set up baseline, as shown in figure 33.The operator is the optical cable standard apparatus of packing in the test, with loss among the measuring optical fiber 17-32, as shown in figure 34.The computer installation of 18 passages needs two devices during more than the optical cable of 18 optical fiber in test.Test unit is that effectively they can provide the capacity greater than 18 passages.

Referring to Figure 35 a and 35b, the optical fiber that some can be used for connector of the present invention is shown.Wherein, Figure 35 a illustrates the optical fiber of a routine, the covering 192 that 190, one preferred diameters of the fiber core that it has a preferred diameter is .0625mm are .125mm and a .25mm diameter cushion 193 that preferably expands .25mm diameter as shown in the figure to.Can understand, groove number in disclosed preferred size and the light path sheet below is used for this size optical fiber.

In order to obtain the intensity of 250 microns optic fibre of buffer layer, can be to 62.5/125 optical fiber, shown in Figure 35 b one 135 microns polyimide coating coated.Can find out that from Figure 35 b this optical fiber comprises that 190, one of a fiber core that the preferred diameter of .0625mm arranged preferably expands covering 192 and polyimide coating 194 that preferably expands the .140mm diameter to of .125mm diameter to.Though polyimide coating can improve the density of MACII, polyimide coating can increase the cost of optical fiber usually, because the optical fiber of polyimide coated is usually expensive than optic fibre of buffer layer significantly.

Referring to Figure 36-38a, often connector of the present invention is shown with label 196.This connector comprises a plurality of optical fiber, and for example optical fiber 198,200 and 202.This connector also comprises a piece 204, and this piece is made up of substantially the same light path sheet 206 and 208.All optical fiber is loaded on a plurality of V-shaped grooves, and for example in 210, all V-shaped grooves have between the end slot 212 and 214 of register pin (not shown) between two.When light path sheet on the handle overlapped on light path sheet down, two V-shaped grooves that adjoin just formed the axial hole in the piece of producing.Optical fiber 198 and 202 is parts of optical fiber ribbon cable 216, and band cable 216 comprises around each optical fiber, 222 and 224 insulating material for example, for example 218 and 220.At the opposite side of connector, the external part 226 and 228 of these optical fiber is arranged.Band cable 216 also overlaps on another band cable 230.This band cable also has the insulating material of topped each type optical fiber of 234, and for example 232, it stretches into connector below fiber core and band cable 216, engaging a V-shaped groove in the piece, and stretch out from the opposite side of V-shaped groove, enters an external part, and for example 236.Enter in the piece before all axial holes at all optical fiber, they are alternately entered in each vertical plane, referring to Figure 38 b, can find out, connector of the present invention is fit to use together with conventional connector, in Figure 38 b often with the conventional connector of label 238 expressions.This conventional connector comprises one by two light path sheets 242 and 244 pieces of forming 240, and they have the end slot of the engage dowel pin (not shown) of 246 and so on V-shaped groove and 248 and 250 and so on.This connector also comprises some optical fiber, for example 252,254 and 256.Referring to Figure 38 a and 38b, can find out simultaneously, can in connector 238, receive optical fiber, as the situation of optical fiber 200 from connector 196 from figure.Also can find out the optical fiber 252,254 and 256 of the connector V-shaped groove in connector 196 in also can receiving connector 238.Figure is in the connector shown in the 36-38a, and last fibre ribbon center line preferably departs from 125 microns from following fibre ribbon center line.Figure 36 and 37 explanations, 2 * 18 arrays are merged into 1 * 36 array, to enter the light path sheet.Because two arrays form an independent array, so go up the even number position that the optical fiber of array places down the light path film trap, the optical fiber of following array then places down in the odd bin of light path sheet.In Figure 38 a, 36 optic fibre light path sheets explanation keeps 18 optic fibre light path sheets compatible required groove and optical fiber structure.Figure 38 a compares 18 optic fibre light path sheets shown in 36 optic fibre light path sheets and Figure 38 b, and the required optical fiber of all light path sheets is used in explanation simultaneously consistently.For example, 16 optical fiber cooperate 32 optical fiber, and it is effective having only 16 optical fiber in 32 optical fiber.In the time thereafter, the user can improve whole members, to utilize whole 32 optical fiber.Also can know,, should overlap one or more additional optical fiber ribbon cables on these band cables, with the number of fibers that receives in the further increase connector though two optical fiber ribbon cables only are shown in the illustrated embodiment.

Should be known in that above-mentioned light path sheet can have many V-shaped grooves and admit many optical fiber.Especially, expect that desirable thing is, 16-36 vertical V-shaped groove that can connect tenon 16-36 root optical fiber should be arranged in each light path sheet; Preferable thing is that 36 vertical V-shaped grooves of 36 optical fiber of receivability should be arranged in each light path sheet.Preferably: all V-shaped grooves should separate .124mm to .126mm in center line apart from one another by opening certain distance, and being spaced apart .07 between its edge is that .050mm is to .070mm to .013mm and groove depth.Preferablely be: spacing is 125 microns between the center line of all grooves, is that 10 microns and the degree of depth are that .050mm is to .070mm between its edge.As regular situation, each light path sheet all has the length of about 6.09mm to about 6.35mm, and the width of about 5.843mm and about .71mm are to the height of about .76mm.

In order to satisfy the needs that reduce optical fiber cost and 125 microns intervals, also might lay 36 optical fiber at 125 microns centers in the MACII type shell of the present invention.By add some other optical fiber between 250 microns intervals of the MACII of routine type, current density can double.If the band of two 18 optical fiber departs from 125 microns, then the optical fiber of 36 decortications can be in 125 microns center in one-dimensional array, makes one 2 * 18 fiber array transfer into one 1 * 36 fiber array.

Example

Make 2 * 16 fiber arrays that have two 18 fibre ribbons with 32 optic fibre light path sheets.Two-dimensional array is merged into an one-dimensional array at 140 microns centers (because one 36 optic fibre light path sheet is invalid this moment).For optical fiber being enclosed in the groove at 140 microns centers, just independently two arrays are sent into the light path sheet.Be positioned at last array after the odd bin of 32 optic fibre light path sheets, following optical fiber is just introduced in the even bin by last optical fiber.

Should be known in that connector and the method described can make the fiber count that receives in the specific connector increase economical and effectively.

Though the preferred embodiment in conjunction with each figure has been described the present invention, understand, can use other similar embodiment, perhaps can make and revise and replenish described embodiment, carrying out same task of the present invention, and do not depart from the present invention.Therefore, the present invention should not be limited to any independent embodiment, and should explain according to width and scope that battle array in the appended claims is stated.

Claims

1. oversensitive array connector that is used for optical fiber comprises:

(a) connector block, it has a plurality of fine axial holes that are used to admit;

(b) one first band optical fiber cable, it comprises multifiber, their insulation blockings on the one partial-length, and in its joint not insulation blocking of end, and stretch in first group of axial hole by block element; With

(c) one second band optical fiber cable, it comprises multifiber, and insulation blocking on its a part of length, and in the joint not insulation blocking of end of described optical fiber, and described optical fiber extends through second group of axial hole.

2. connector according to claim 1, wherein, first and second groups of axial holes are alternately to concern.

3. connector according to claim 1, wherein, going up the light path sheet by a following light path sheet and one for described forms, following light path sheet has upper and lower surface, and on its upper surface, have a plurality of vertical V-shaped grooves, last light path sheet then has upper and lower surface, and has a plurality of upper and lower V-shaped grooves on its lower surface, and each described groove is oriented to overlap on a described groove on the described light path sheet down.

4. connector according to claim 3, wherein, groove is a V-arrangement.

5. connector according to claim 3, wherein, groove has center line, and center line separates according to the distance from about .124mm to about .126mm.

6. connector according to claim 5, wherein, groove has the edge, and described edge separates according to the distance from about .007mm to about .013mm.

7. connector according to claim 5, wherein, groove has the degree of depth, and the degree of depth of described groove is to about .070mm from about .050mm.

8. connector according to claim 3, wherein, each light path sheet is all had an appointment 6.09mm to the length of about 6.35mm, and the width of about 5.843mm and about .71mm be the height of about .76mm extremely.

9. connector according to claim 8, wherein, each light path sheet is all had an appointment 16 to about 36 cannelures.

10. connector according to claim 9 wherein, all has 37 cannelures on each light path sheet.

11. connector according to claim 3, wherein, the light path sheet is a silicon.

12. connector according to claim 1, wherein, the joint end of the joint end of the optical fiber of first optical fiber ribbon cable and the optical fiber of second optical fiber ribbon cable interlocks.

13. connector according to claim 1, wherein the joint end of each optical fiber all is positioned at independent vertical plane near axial hole.

14. connector according to claim 13, wherein, all there is the diameter from .120mm to .125mm each joint end of optical fiber.

15. connector according to claim 3, wherein, last light path sheet is connected with a kind of bonding agent with following light path sheet.

16. an assembling is used for the method for the oversensitive array connector of optical fiber, may further comprise the steps:

(a) comprise in a plurality of first band optical fiber cables that are encapsulated into the optical fiber in the isolated material at one, take out a part of described isolated material exposing the not isolating joint end of described optical fiber, and the described not isolating joint end of the described joint end of described optical fiber is put into down in first group of cannelure on the upper surface of light path sheet;

(b) comprise in a plurality of second band optical fiber cables that are encapsulated into the optical fiber in the isolated material at one, take out a part of described isolated material exposing the not isolating joint end of described optical fiber, and the described not isolating joint end of the described joint end of described optical fiber is put into down in second group of cannelure on the upper surface of light path sheet;

(c) locate one like this and have a last light path sheet that has the lower surface of a plurality of axial grooves, so that the described described lower surface of going up the light path sheet is overlapped on the described upper surface of described light path sheet down, and all grooves on described all light path sheets form all axial holes in a piece that comprises described upper and lower light path sheet and described optical fiber extends through described axial hole.

17. method according to claim 16, wherein, on each light path sheet, have from about 16 to about 36 grooves.

18. method according to claim 17 wherein, has 37 cannelures on each light path sheet.

19. a silicon light path sheet is used to connect the optical cable with opposite planar side, and each described planar side all have from about 16 to about 37 cannelures.

20. silicon light path sheet according to claim 19 wherein, all has 37 cannelures in each planar side.