The research of fiber-optic application loss reachs its the way to deal with a situation

The continue loss with 1 continue fiber-optic loss basically includes: This fiber-optic asking for the frit that the inherent loss that the element causes and blame ask for an element to cause originally accepts loss and mobile connect loss 3 kinds. (1) fiber-optic and inherent loss basically results from diameter of fiber-optic model field is abhorrent; Fiber-optic core diameter is broken match; Fine core is sectional out of round; Fine core and bag layer are homocentric degree not beautiful at 4 o'clock; Affect among them the biggest is modular field diameter abhorrent. (2) the frit that frit receives loss blame to ask for an element originally accepts loss main by axial amlposition; Axes (knuckle) tilt; End panel is separate (clearance) ; Fiber-optic end panel is not complete; Refractive index is wrong; Fiber-optic end panel is not clean and measure of level of continue personnel operation, operation, frit receives machine electrode cleanness degree, frit receives environment of parameter setting, work the other factor such as clean degree is caused. (3) the mobile connect wear and tear that blame of mobile connect loss collects an element originally basically is differred by mobile connector quality, the contact is not undesirable, clean and receive a few factors with same loss with frit (if clearance of axial amlposition, end panel, knuckle, refractive index is wrong,wait) cause. 1.

The 2 program that settle continue loss (1) engineering design, construction and what character should choose to agree in defending the work is high grade and fiber-optic the naked a rope for towing a boat of high grade famous brand that same batch uses as far as possible on a circuitry, the character with fiber-optic in an attempt to matchs as far as possible, the influence that makes modular field diameter accepts loss to fiber-optic frit falls lowermost rate. (2) answer to undertake strictly matching by regulations and requirement when cable construction dish when accomplish dishes of whole configuration as far as possible (odd dish of ≥ 500 meters) , with reducing contact amount as far as possible. When laying press cable strictly dish number and end fasten ordinal cloth to put, make loss value is achieved the smallest. (3) choose seasoned the volume that well-trained continue personnel has continue and the level that test continue staff affect continue loss directly, continue personnel should receive technological process strictly to have follow according to fiber-optic frit, control contact loss strictly, frit receives the hour in the process to make consumed region reflexes appearance (OTDR) undertake monitoring (continue loss ≤ 0.

08dB/ ) , do not accord with a requirement should new frit is received. Use light time domain reflexes appearance (OTDR) when, answer to measure the loss of contact from two direction, beg the average that gives these two results, eliminate the factitious element error that one-way OTDR measures. (4) make sure continue environment accords with a requirement forbidden operation of the open air in the environment that reachs moisture in much dirt, cable continue place and tool, material should keep clean, must not let fiber-optic connect be affected with damp be affected with damp, those who plan cut is fiber-optic must clean, must not have contamination. Cut gloriole fine must not expose time to grow to be especially in the environment of much dirt moisture too in air. When continue environment temperature is too low, should adopt warm up necessarily measure. (5) the fiber-optic end panel with perfect preparation is fiber-optic the preparation of end panel is the working procedure with fiber-optic most crucial continue. Of fiber-optic end panel perfecting was one of main reasons that decide fiber-optic continue loss. High grade end panel should level off, without burr, without be short of caustic, and as perpendicular as axes, the axes dip of fiber-optic end panel should is less than 0.

3 degrees, present the lens side of a smooth level off, and keep clean, prevent dirt pollution. Should choose high grade cut knife, use cut knife cut correctly fiber-optic. The cleanness of naked fine, cut and frit reinforce join cheek by jowl, cannot interval is too long. Want to take put down gently gently when shift is fiber-optic, prevent to be brushed with other thing touch and injure fiber-optic end panel. (6) use frit correctly to receive opportunity is right use frit is received machine be those who reduce fiber-optic continue loss is important assure and crucial link. ① should receive the operation specification of machine and operation flow strictly according to frit, correct operation frit is received machine. ② is reasonable place fiber-optic, will fiber-optic in placing frit to accept the V of machine slot when, the movement wants deft. Because be the Chan Moguang of 10 Nm to fine core diameter,this is fine, if want frit,receive loss to be less than 0.

1dB, the radial deflection of fiber-optic axes should is less than 0.

8nm. ③ installs frit correctly to receive parameter reasonably according to fiber-optic type (discharge beforehand electric current, time and advocate discharge electric current, advocate discharge time) . In use mixes ④ seasonable purify frit answers to receive the dirt in machine after using (especially the dust inside face of clamping apparatus, each lens and ｖ chamfer and fiber-optic broken end) . ⑤ frit receives the service life of machine electrode to be made an appointment with 2000 times commonly, the electrode after use time is longer can be oxidized, bring about discharge electric current to slant big and make frit receives loss value to increase. Right now detachable next electrode, with dip in of alcohol medical the reload after pledget is wiped gently is received to frit on machine, discharge clean. Be like electric current of the discharge after cleaning for many times to still slant big, must change afresh electrode. (7) the mobile connector that chooses high grade qualification as far as possible, assure what connector function index accords with connect of relevant provision activity to insert loss to should be controlled in 0.

3 DB/ the following (lower even) , additional loss is more than 0.

2 DB/ (8) mobile connect should be received insert good, coupling close together, avoid light leak appearance (9) make sure mobile connector is clean construction, in safeguarding, should notice to clean plug and adapter (flange dish) the cleanness that assures computer room and equipment environment, take strict precautions against plug and adapter (flange dish) have contamination and dirt, reduce scattering loss as far as possible. 2, blame continue loss and its solution 2.

Loss of 1 blame continue is fiber-optic the blame continue loss that in using, causes basically has the loss that curves loss and other construction element and applied environment to cause. (1) curve the radiation loss that cause to become fiber-optic be folded by very big turn, radius of bend and diameter of its fine core are had when can comparing a gender, its transmission character can produce change. Many conduction the model is changed into radiation model, continue to transmit no longer, enter packet of layer to be absorbed by coat or bag layer however, cause fiber-optic additional loss thereby. Curve loss fiber-opticly to have grand bend loss and small curve loss two sort. The curvature radius with fiber-optic loss of ① grand turn is bigger than fiber-optic diameter bend more (grand turn) the additional loss that cause, main reason has: Road by in turn and laying bend; All sorts of obligate of fiber-optic cable cause bend (obligate circle, all sorts of taking bend curvedly, naturally) ; In contact box fiber-optic dish stay, what the computer room reachs fine of the end inside equipment is voluminous etc. Fiber-optic axis produces loss of ② small turn of μ M class bend (small turn) the additional loss that cause, main reason has: Fiber-optic when becoming cable, bearing face is little irregular cause each part stress inhomogenous and the random sex that form is small curved; Fine core and the small turn that wrap the interface of the layer to be not formed glossily; When cable lays, everywhere tension is inhomogenous and those who form is small curved; Fiber-optic the lateral pressure that get is inhomogenous and those who form is small curved; Fiber-optic encounter temperature change, because heat bilges cold shrink formation small turn. (2) the loss that cause is worn on other construction element and the loss ① is non-standard cable that use an environment to cause. The layer wrings type pine to cover structural cable to produce this kind of loss easily, the reason depends on, it is firstly loose bushing of place much root is worn on cable mutual wring; It is to use secondly plunge into colligation of belt general loose bushing to arrive the look fine of contact box dish when blocking an opening, make loose bushing appears elbow; It is the metal when be being worn on cable strengthens amlposition of occurrence fluctuation of component part and fiber-optic loose bushing thirdly. These elements can cause loss to increase. The hot frit with ② undesirable shrink protects the loss that cause. The reason basically has, it is the quality problem of oneself of canal of the protection that heat up frit firstly, twist appears after hot frit, generate bubble; It is frit secondly when receiving the heater of machine to heat, heat parameter setting is undeserved, cause the protection that heat up frit to the canal is out of shape or generate bubble; It is shrink canal thirdly sordid, have dirt or grit, dot of add of the butt joint when hot frit has loss, cause loss to increase. ③ buries the loss that non-standard construction causes cable continuously. The reason depends on, it is cable is buried firstly deep insufficient, be ground the damage after pressing by carring capacity object; It is cable road secondly by the choice undeserved, because environment and landform change make cable is exceeded his the outside force of concessional bear limits; It is cable channel bottom thirdly rough, since cable occurrence arch, hang a phenomenon, backfill hind has leftover stress; Its 4 it is other reason a damage is protected to hurt outside causing cable and drink water, cause hydrogenous damage. The loss that non-standard construction causes cable of ④ built on stilts. The reason basically has, it is to be in labor of cable apply facilities firstly, cable hits circlet, turn to fold, twist reachs dozen of back to buckle, the hale when drawing, occurrence surge, the moment is the biggest traction is too big; It is cable link up with is used secondly undeserved, card registers way abhorrent occurrence move with the body on the ground is curved, interval is too few and far between, cable because sag is too big and get power; It is dish of cable that stays on lever thirdly not fixed and firm, cable is sufferred loss with short-term wallop by long-term outside force; Its 4 it is cable place troops on garrison duty too close, did not consider the natural percentage elongation of cable; Its 5 it is other reason a damage is protected to hurt outside causing cable and drink water, cause hydrogenous damage. The loss that non-standard construction causes ⑤ conduit cable. The reason depends on, it is cable firstly when using a net to cover law place troops on garrison duty, drawing speed control is bad, cable appears hit a back to buckle, surge; It is to wear secondly when putting cable, do not have material for making clothes of model of place troops on garrison duty to be in charge of, cable by abrade; It is other reason thirdly a damage is protected to hurt outside causing cable and drink water, cause hydrogenous damage. Fine of the end inside ⑥ computer room, equipment and fiber-optic jump line colligation, voluminous non-standard, occurrence across is twined wait for a phenomenon to cause loss. Quality of box of ⑦ cable connect is undesirable, contact box is enclosed, installation is non-standard, because outside action causes contact box to be injured,wait, cause drink water and appear hydrogenous caustic. ⑧ cable is out of shape in the drawing in erect process, pressure of cable of solid of the clip in continue box is too great, look fine dish in hot frit pipe buckle has been pressed close, the Pan Zhongguang that allow fine fine is voluminous non-standard wait for the loss that cause. 2.

The 2 program that settle blame continue loss (1) in project survey design, construction, should choose optimal route by lay with circuit means. (2) establish, the construction team that selects a high quality, assure construction quality, this are crucial, the neglect in any construction causes fiber-optic loss likely to increase. (3) design, construction, in safeguarding, take cogent and significant cable line actively " 4 prevent " measure (prevent thunder, prevent report, corrosion protection, prevent damage) , strengthen defend the job. (4) use bracket holds a cable in the palm dish cloth puts cable, do not want a cable dish after laying, use similar the method cloth that puts from bobbin puts cable, do not let cable get torsional. When cable cloth is put, should unite direct, strengthen contact, want to use scientific and reasonable drawing method. Speed of place troops on garrison duty should not pass fast; Length of successive place troops on garrison duty shoulds not be too long, should use when necessary " 8 " word, from which put to bicephalous cloth. Must take care in the turning place that injures cable likely and adopt necessary salvo. Encounter the need such as cable is put in downtown cloth temporarily when the circumstance of Pan Fangguang cable, use 8 glyphs dish stay, do not let cable get torsional. (5) when cable cloth is put, must note the restriction of permission rated pulling force and radius of bend, in labor of cable apply facilities, forbidden cable hits circlet and turn to fold, screwy, prevent to hit a back to buckle with surge phenomenon. Traction does not exceed the 80 ％ that cable allows, the biggest traction does not exceed the instant 100 ％ , traction should be added on the reinforcement of cable, special attention cannot hale and produce twist together phenomenon. The 15 ～ that the radius of bend when cable turns should not be less than cable external diameter 20 times. (6) do not use inferior, had curved metabolic shrink bushing especially, such bushing can produce stress in the interior when shrink, bring to bear on in fiber-optic on make loss increases. Carry, when depositing bushing, the attention is clean, do not let an eyewinker enter bushing. (7) when continue is operated, want a basis to accept dish dimension decides to pare length, leave as far as possible pare a few longer, make fiber-optic easier voluminous inside closing quotation (dish leave length to be 60 ～ 100cm) . After should taking frit seriously to receive, accept fiber-opticly (dish of fiber-optic fine and fixed) , dish when fine, dish the radius of the circle is bigger, radian is bigger, the loss of whole line is smaller, the radius that must keep certain so (R ≥ 40mm) , avoid to produce needless loss, the key of continue of cable of big core number is in accept. When continue is operated, knife opening cable cuts the deepness of cable to want to had held, do not make loose bushing squash fiber-optic get power. Use eligible connect data and ask according to standard and operation, enclose correctly, installation connect box. (8) inside the computer room as far as possible neat, end fine should have a circle to circle bring protection, or use a line to end fine alone, do not make the occasional of end fine with its he is connected across is twined between the line, also do not want an end a rope for towing a boat as far as possible (even if use temporarily) the place that is put in the foot to be able to walk. The attention when cable terminal avoids to jump the line appears in taking a line orthogonal, do not apply plastic belt to will jump especially the line is plunged into become right angle, otherwise fiber-optic because suffer stress for a long time,the influence causes loss to increase. Jump the line should go a curve when bend, radius of bend should not be less than 40 ｍ ｍ . Cloth is put in should assure to jump the line does not get power, not press press, jump in order to avoid the stress with extended line is fatigue. Fiber-optic Cheng Duancao is made (ODF) when, not end fine bundle up too close. (9) be safeguarded what reinforce cable line daily and the technology maintains the job. Fiber-optic enter door (FTTH) be information age development is inevitable, optical network interconnection is digital earth tomorrow. A large number of construction that accompanying network of various and of all kinds fiber-optic communication and move, face up to and solve fiber-optic the transmission loss problem that in using, poses is sure to be in design of fiber-optic communication engineering, construction, in safeguarding, be improved greatly and optimize fiber-optic communication network to transmit function. CNC Milling