Choyamba, chidziwitso choyambirira cha module ya Optical
1. Tanthauzo la optical module:
Optical module: ndiye kuti, gawo la optical transceiver.
2. Mapangidwe a Optical module:
Optical transceiver module imapangidwa ndi chipangizo cha optoelectronic, chigawo chogwira ntchito ndi mawonekedwe owoneka bwino, ndipo chipangizo cha optoelectronic chimaphatikizapo magawo awiri: kutumiza ndi kulandira.
Gawo lotumizira ndi: chizindikiro chamagetsi cholowetsa nambala inayake chimakonzedwa ndi chipangizo choyendetsa mkati kuti chiyendetse laser ya semiconductor (LD) kapena diode yowala (LED) kuti itulutse chizindikiro chowunikira cha mulingo wofananira, ndi kuwala. mphamvu zodziwikiratu kulamulira dera ndi mkati anapereka mmenemo. Mphamvu yamagetsi yotulutsa kuwala imakhalabe yokhazikika.
Gawo lolandirira ndi: gawo la optical signal input module of code code imasinthidwa kukhala chizindikiro chamagetsi ndi diode yojambula zithunzi. Pambuyo pa preamplifier, chizindikiro chamagetsi cha nambala yofananira chimatuluka, ndipo chizindikiro chotulutsa nthawi zambiri chimakhala mulingo wa PECL. Panthawi imodzimodziyo, chizindikiro cha alamu chimatuluka pambuyo poti mphamvu ya kuwala yolowetsayo ili yochepa kuposa mtengo wina.
3.Zigawo ndi kufunikira kwa module ya kuwala
Ma module a Optical ali ndi zofunikira zambiri zaukadaulo wa optoelectronic. Komabe, pama module awiri otentha osinthika, GBIC ndi SFP, magawo atatu otsatirawa amakhudzidwa kwambiri posankha:
Kutalika kwapakati
Mu nanometers (nm), pali mitundu itatu yayikulu:
850nm (MM, multimode, otsika mtengo koma lalifupi kufala mtunda, zambiri yekha 500M); 1310nm (SM, single mode, kutaya kwakukulu panthawi yopatsirana koma kubalalitsidwa kwakung'ono, komwe kumagwiritsidwa ntchito kufalitsa mkati mwa 40KM);
1550nm (SM, mode single, kutayika kochepa panthawi yopatsirana koma kubalalitsidwa kwakukulu, komwe kumagwiritsidwa ntchito kufalitsa mtunda wautali pamwamba pa 40KM, ndipo imatha kutumiza mwachindunji 120KM popanda kutumiza);
Mtengo wotumizira
Chiwerengero cha ma bits (bits) a data yotumizidwa pamphindikati, mu bps.
Pano pali mitundu inayi yomwe imagwiritsidwa ntchito kwambiri: 155 Mbps, 1.25 Gbps, 2.5 Gbps, 10 Gbps, ndi zina zotero. Mlingo wa kufala nthawi zambiri umagwirizana m'mbuyo. Choncho, 155M optical module imatchedwanso FE (100 Mbps) optical module, ndipo 1.25G optical module imatchedwanso GE (Gigabit) optical module. Iyi ndiye gawo lomwe limagwiritsidwa ntchito kwambiri pazida zamagetsi zamagetsi. Kuonjezera apo, mlingo wake wotumizira mu fiber storage systems (SAN) ndi 2Gbps, 4Gbps ndi 8Gbps.
Mtunda wotumizira
Chizindikiro cha kuwala sichiyenera kutumizidwa kumtunda womwe ungathe kufalitsidwa mwachindunji, pamtunda wa makilomita (omwe amatchedwanso makilomita, km). Ma module a kuwala amakhala ndi izi: multimode 550m, single mode 15km, 40km, 80km, 120km, ndi zina zotero.
Chachiwiri, lingaliro lofunikira la ma module optical
1.Laser gulu
Laser ndiye gawo lapakati kwambiri la module ya optical yomwe imalowetsa pano mu semiconductor material ndipo imatulutsa kuwala kwa laser kudzera pa photon oscillations ndikupindula m'mimba. Pakadali pano, ma laser omwe amagwiritsidwa ntchito kwambiri ndi FP ndi DFB lasers. Kusiyana kwake ndikuti zida za semiconductor ndi kapangidwe ka patsekeke ndizosiyana. Mtengo wa laser DFB ndi wokwera mtengo kwambiri kuposa FP laser.Optical modules yokhala ndi mtunda wautali mpaka 40KM nthawi zambiri amagwiritsa ntchito FP lasers.Optical modules with transmission distances≥40KM nthawi zambiri amagwiritsa ntchito ma laser a DFB.
2.Kutumiza mphamvu ya kuwala ndi kulandira kumva
Mphamvu yamagetsi yopatsirana imatanthawuza mphamvu yotulutsa kuwala kwa gwero la kuwala kumapeto kwa gawo la optical module. Kuzindikira kolandirira kumatanthawuza mphamvu yochepera yolandirira ya Optical module pamlingo wina ndi kulakwitsa pang'ono.
Magawo a magawo awiriwa ndi dBm (kutanthauza decibel milliwatt, logarithm ya mphamvu yamagetsi mw, chiŵerengero cha mawerengedwe ndi 10lg, 1mw chimasinthidwa kukhala 0dBm), chomwe chimagwiritsidwa ntchito makamaka kutanthauzira mtunda wotumizira mankhwala, kutalika kwake kosiyana, mlingo kufala ndi The kuwala module wa kuwala kufalitsa mphamvu ndi kulandira tilinazo adzakhala osiyana, bola kufala mtunda angatsimikizidwe.
3.Kutayika ndi kubalalitsidwa
Kutayika ndiko kutayika kwa mphamvu ya kuwala chifukwa cha kuyamwa ndi kubalalika kwa sing'anga ndi kutuluka kwa kuwala pamene kuwala kumafalikira mu fiber. Mbali iyi ya mphamvu imatayidwa pamlingo wina pamene mtunda wotumizira ukuwonjezeka.Kubalalika kumachitika makamaka chifukwa cha liwiro losagwirizana la mafunde a electromagnetic a mafunde osiyanasiyana omwe amafalikira mu sing'anga yomweyo, zomwe zimapangitsa kuti zigawo za kutalika kwa mawonekedwe a kuwala zifike kulandira malekezero nthawi zosiyanasiyana chifukwa cha kuchuluka kwa mtunda wotumizira, zomwe zimapangitsa kuti kugunda kwa mtima kukule ndipo motero kulephera kusiyanitsa zizindikiro. mtengo. Magawo awiriwa amakhudza makamaka mtunda wotumizira wa module optical. Munjira yeniyeni yogwiritsira ntchito, 1310nm Optical module nthawi zambiri imawerengera kutayika kwa ulalo pa 0.35dBm/km, ndipo 1550nm Optical module nthawi zambiri imawerengera kutayika kwa ulalo pa .20dBm/km, ndikuwerengera mtengo wobalalika. Zovuta kwambiri, nthawi zambiri zimangotanthauza.
4.Moyo wa module ya kuwala
Miyezo yogwirizana yapadziko lonse lapansi, maola 50,000 ogwira ntchito mosalekeza, maola 50,000 (ofanana ndi zaka 5).
The SFP Optical modules onse ndi LC interfaces. Ma module a GBIC Optical onse ndi SC interfaces. Ma interface ena ndi FC ndi ST.