Horudhac: Fiber isgaadhsiinta ayaa loo qaybiyaa hal qaab fiber iyo fiber multimode iyadoo loo eegayo tirada hababka gudbinta ee hoos yimaada wavelength codsiga Sidaa darteed, waxay leedahay codsiyo badan oo kala duwan oo ku saabsan xaaladaha gudbinta fogaanta gaaban, sida xarumaha xogta iyo shabakadaha degaanka. Iyadoo horumarinta degdega ah ee dhismaha xarunta xogta sanadihii la soo dhaafay, fiber multimode, taas oo ah habka caadiga ah ee xarunta xogta iyo degaanka maxaliga ah. codsiyada network, ayaa sidoo kale keenay guga, taasoo keentay walaac baahsan. Maanta, aan ka hadalno horumarinta fiber multimode.
Sida ku cad qeexitaanka heerka ISO/IEC 11801, fiber multimode waxa loo qaybiyaa shan qaybood oo waaweyn: OM1, OM2, OM3, OM4, iyo OM5. waxaa loola jeedaa 62.5/125mm dhaqanka iyo 50/125mm multimode fiber. OM3, OM4 iyo OM5 waxay tixraacayaan 50/125mm 10 Gigabit multimode fiber-ka cusub.
Marka hore:fiber-dhaqameedka multimode
Horumarinta fiber-ka multimode waxay bilaabatay 1970-meeyadii iyo 1980-meeyadii. Fiilooyinka hore ee multimode waxaa ka mid ahaa cabbirro badan, iyo afar nooc oo cabbir ah oo lagu daray heerarka Guddiga Farsamada Caalamiga ah ee Electrotechnical (IEC) ayaa ka mid ahaa afar. Dhexroorka daboolka xudunta ah waxaa loo qaybiyaa 50/125 μm, 62.5/125 μm, 85/125 μm, and 100/ 140 μm. Iyadoo ay ugu wacan tahay xajmiga weyn ee daboolka xudunta u ah, kharashka wax soo saarka ayaa sarreeya, caabbinta foorarsiga waa mid liidata, tirada hababka gudbinta waa la kordhiyaa, xajmiga xajmiga ayaa la yareeyaa. Sidaa darteed, nooca cabbirka weyn ee cabbirka xudunta u ah ayaa si tartiib tartiib ah loo tirtiraa, iyo laba cabbir oo muhiim ah ayaa si tartiib tartiib ah loo sameeyay. Waxay kala yihiin 50/125 μm iyo 62.5/125 μm, siday u kala horreeyaan.
Shabakadda hore ee degaanka, si loo yareeyo kharashka nidaamka shabakadda degaanka sida ugu badan ee suurtogalka ah, LED qiimo jaban ayaa guud ahaan loo isticmaali jiray iftiinka iftiinka. . Si kastaba ha ahaatee, dhexroorka xudunta u ah iyo daloolka nambarada ee 50/125mm fibre-habka badan ayaa ah mid aad u yar, kaas oo aan ku habboonayn isku-xidhka hufan ee LED. Sida loogu talagalay 62.5 / 125mm fiber multi-mode oo leh dhexroor weyn oo xudun ah iyo aperture tirooyinka, awood badan oo indhaha ah ayaa lagu dari karaa isku xirka indhaha. bartamihii sagaashamaadkii.
Iyada oo korodhka joogtada ah ee heerka gudbinta LAN, laga soo bilaabo dhamaadkii qarnigii 20aad, LAN ayaa la horumariyay oo ka sarreysa heerka lGb/s. Baaxadda 62.5 / 125μm fiber multimode oo leh LED sida isha iftiinka ayaa kaliya si tartiib tartiib ah u awoodin inay buuxiso shuruudaha. Taas bedelkeeda, 50 / 125mm fiber multimode waxay leedahay daloolo tiro yar iyo dhexroorka asaasiga ah, iyo hababka xakamaynta yar. Sidaa darteed, qaabka kala firidhsan ee fiber-mode multi si wax ku ool ah ayaa loo dhimay, iyo bandwidth si weyn u kordhay. Sababtoo ah dhexroorka asaasiga ah ee yar yar, qiimaha wax soo saarka ee 50 / 125mm fiber multi-mode ayaa sidoo kale hoos u dhacaya, sidaas darteed mar kale ayaa loo isticmaalaa.
Heerka IEEE 802.3z Gigabit Ethernet wuxuu qeexayaa in 50/125mm multimode iyo 62.5/125mm multimode fibers loo isticmaali karo warbaahinta gudbinta ee Gigabit Ethernet. Si kastaba ha ahaatee, shabakadaha cusub, 50/125mm fiber multimode ayaa guud ahaan doorbidaya.
Labaad:Laser optimized fiber multimode
Iyadoo horumarinta tignoolajiyada, 850 nm VCSEL (Vertical Cavity Surface Emitting Laser) ayaa soo muuqday.VCSEL lasers si weyn ayaa loo isticmaalaa sababtoo ah way ka jaban yihiin lasers-wavelong-dheer waxayna kordhin karaan xawaaraha shabakada. leysarka hirarka oo kordhin kara xawaaraha shabakadda.Sababtoo ah farqiga u dhexeeya labada nooc ee aaladaha iftiimiya iftiinka, fiber laftiisa waa in wax laga beddelo si loo waafajiyo isbeddellada isha iftiinka.
Baahida leysarka VCSEL, Ururka Caalamiga ah ee Habaynta/Komishanka Electrotechnical International (ISO/IEC) iyo Isbahaysiga Warshadaha Isgaarsiinta (TIA) ayaa si wada jir ah u diyaariyay halbeeg cusub oo loogu talagalay fiber multimode oo leh xudunta 50mm.ISO/IEC waxay kala saaraysaa jiilka cusub of fiber multimode galay qaybta OM3 (IEC standard A1a.2) ee darajada cusub ee multimode fiber, kaas oo ah fibre multimode laser-habboon.
Fiber OM4 ee soo socda ayaa dhab ahaantii ah nooca la cusboonaysiiyay ee fiber multimode OM3. Marka la barbardhigo fiber OM3, heerka OM4 kaliya wuxuu hagaajiyaa index bandwidth fiber. (OFL) at 850 nm marka la barbar dhigo OM3 fiber. Sida ku cad shaxda 2 ee hoose.
Waxaa jira habab badan oo la isugu gudbiyo fiber multimode, iyo dhibaatada foorarsiga caabbinta fiber-ka ayaa sidoo kale la keenay. Marka fiber-ka la foorarsado, habka-sarreeya si fudud ayaa loo daadiyaa, taasoo keentay luminta calaamadda, taas oo ah, luminta luminta fiber-ka u gudbi shuruudaha sare ee caabbinta foorarsiga.
Si ka duwan qaabka fudud ee tusaha wax-soo-celinta ee fiber-ka-hal-habka ah, astaanta index-ka-soo-celinta ee fiber-ka-badan waa mid aad u adag, oo u baahan qaabaynta profile index profile-ka iyo farsamaynta. diyaarinta ugu saxsan ee fiber multimode waa habka kaydinta kiimikada plasma (PCVD), oo ay wakiil ka tahay Shirkadda Changfei. Geedi socodkani wuu ka duwan yahay hababka kale ee uu leeyahay lakabka dhigaalka ee dhowr kun oo lakab iyo dhumucdiisuna tahay kaliya 1 micron halkii lakab inta lagu jiro. dhigista, awood ultra-fine refractive index qalooca gacanta si loo gaaro bandwidth sare.
Iyada oo la wanaajinayo astaanta tusmada dib u soo celinta ee fibre-ga multimode-ka, foorarrada multi-mode-ka ah ee aan dareenka lahayni waxay leedahay horumar la taaban karo oo ku aaddan caabbinta foorarsiga, sida ku cad sawirka 1 hoose.
Jaantuska.1 Isbarbardhigga waxqabadka macrobend ee u dhexeeya foorarsiga u adkaysta fiber multimode iyo fiber multimode caadiga ah
Saddexaad:fiber multimode cusub (OM5)
OM3 fiber iyo fiber OM4 waa fiber multimode inta badan loo isticmaalo band 850nm.Sida heerka gudbintu sii korodho, kaliya naqshadeynta band hal kanaal waxay keeni doontaa kharashyo badan oo xoog leh oo xadhkaha ah, kharashka maaraynta iyo dayactirka ee la xidhiidha ayaa kordhin doona si waafaqsan. .Sidaa darteed, farsamayaqaanadu waxay isku dayaan inay soo bandhigaan fikradda isku dhufashada qaybinta mawjada dhererka nidaamka gudbinta hababka kala duwan. Haddii mawjadaha dhaadheer ee badan lagu kala qaado hal fiber, tirada u dhiganta fibre-barbardhigga iyo kharashka dhigista iyo dayactirka aad ayaa loo dhimi karaa. Xaaladdan, fiber OM5 ayaa timid.
OM5 multimode fiber waxay ku salaysan tahay fiber OM4, taas oo ballaarisa kanaalka-bandwidth-sare waxayna taageertaa codsiyada gudbinta ee 850nm ilaa 950nm. Codsiyada caadiga ah ee hadda jira waa SWDM4 iyo SR4.2 naqshadaha. SWDM4 waa isku dhufashada mawjadaha dhererka dhererka afar mawjadaha gaaban, kuwaas oo ah 850 nm, 880 nm, 910 nm, iyo 940 nm, siday u kala horreeyaan. SR4.2 waa isku-dhufashada laba-mawjadaha dhererka dhererka, inta badan loo isticmaalo tiknoolajiyada labajibbaaran ee hal-fiber. isbarbardhigga qeexida baaxadda baaxadda weyn ee OM4 iyo OM5.
Waqtigan xaadirka ah, fiber OM5 ayaa loo isticmaalay nooc cusub oo fiber multimode-dhamaadka sare ah.Mid ka mid ah kiisaska ganacsiga ugu weyn waa kiiska ganacsiga OM5 ee Changfei iyo xarunta xogta ugu weyn ee China Tareennada Corporation ee xarunta xogta ayaa ujeedadoodu tahay faa'iidooyinka codsiga fiber OM5 ee nidaamka qaybinta mawjada ee SR4.2. Waxay ku gaartaa isgaadhsiinta awoodda ugu badan ee qiimaha ugu hooseeya, waxayna u diyaarisaa heerka cusboonaysiinta mustaqbalka. Qiimaha mustaqbalka waxa lagu kordhin doonaa 100Gb/s ama xataa 400Gb. /s, ama codsiyada ballaaran, ma beddeli karaan fiber-ka, taasoo si weyn u yaraynaysa kharashaadka cusboonaysiinta mustaqbalka.
Soo koobid: Maaddaama baahida codsiyada ay sii kordheyso, fiber multimode waxay u socotaa luminta luminta hoose, xajmiga sare, iyo multi-wavelength multiplexing. iyaga ka mid ah, codsiga ugu macquulsan waa fiber OM5, kaas oo leh waxqabadka ugu fiican ee fiber multimode hadda, waxayna bixisaa xalal xoog leh oo fiber ah oo loogu talagalay nidaamyada hirarka badan ee 100Gb / s iyo 400Gb / s mustaqbalka Mustaqbalka, Changfei wuxuu soo saari doonaa xalal cusub oo fiber multimode ah oo lala yeesho asxaabta warshadaha, taasoo keenaysa horumar cusub iyo kharashyo hoose oo loogu talagalay xarumaha xogta iyo isku xirka fiber optic.