A fannin sadarwa, haɗin cibiyar bayanai, da jigilar bidiyo, kebul na fiber optic abin sha'awa ne ƙwarai. Duk da haka, gaskiyar magana ita ce kebul na fiber optic ba zaɓi ne mai araha ko mai yiwuwa ba don aiwatarwa ga kowane sabis na mutum ɗaya. Don haka amfani da Wavelength Division Multiplexing (WDM) don faɗaɗa ƙarfin fiber akan kayayyakin fiber da ake da su yana da matuƙar kyau. WDM fasaha ce da ke ninka siginar gani da yawa akan fiber ɗaya ta amfani da raƙuman haske daban-daban na laser. Za a yi bincike mai sauri kan filayen WDM akan CWDM da DWDM. An gina su ne akan ra'ayi ɗaya na amfani da raƙuman haske da yawa akan fiber ɗaya. Amma dukansu suna da fa'idodi da rashin amfani.
Menene CWDM?
CWDM yana tallafawa har zuwa tashoshi 18 masu tsawon rai da aka watsa ta hanyar zare a lokaci guda. Don cimma wannan, bambancin tsawon rai na kowace tasha yana da nisan 20nm. DWDM, yana tallafawa har zuwa tashoshi 80 masu tsawon rai a lokaci guda, tare da kowanne daga cikin tashoshin 0.8nm kawai. Fasahar CWDM tana ba da mafita mai sauƙi da araha don gajerun nisan har zuwa kilomita 70. Don nisan da ke tsakanin kilomita 40 da 70, CWDM yana iyakance ga tallafawa tashoshi takwas.
Tsarin CWDM yawanci yana tallafawa raƙuman ruwa guda takwas a kowace zare kuma an tsara shi don sadarwa mai ɗan gajeren zango, yana amfani da mitoci masu faɗi tare da raƙuman ruwa da aka bazu nesa.
Tunda CWDM ya dogara ne akan tazarar tashoshi 20-nm daga 1470 zuwa 1610 nm, yawanci ana tura shi akan tazarar fiber har zuwa kilomita 80 ko ƙasa da haka saboda ba za a iya amfani da amplifiers na gani tare da manyan tashoshi na tazara ba. Wannan tazarar tashoshi mai faɗi yana ba da damar amfani da na'urorin gani masu matsakaicin farashi. Duk da haka, ƙarfin hanyoyin haɗin da kuma nisan da aka tallafa ba su da yawa tare da CWDM fiye da na DWDM.
Gabaɗaya, ana amfani da CWDM don ƙarancin farashi, ƙarancin ƙarfin aiki (ƙasa da 10G) da kuma gajeriyar aikace-aikacen nesa inda farashi muhimmin abu ne.
Kwanan nan, farashin sassan CWDM da DWDM sun zama iri ɗaya. Raƙuman CWDM a halin yanzu suna iya jigilar har zuwa Gigabit Ethernet 10 da 16G Fiber Channel, kuma da wuya wannan ƙarfin ya ƙara ƙaruwa a nan gaba.
Menene DWDM?
Ba kamar CWDM ba, haɗin DWDM ana iya ƙara shi kuma saboda haka, ana iya amfani da shi don aika bayanai mai nisa sosai.
A cikin tsarin DWDM, adadin tashoshi masu yawa sun fi CWDM yawa saboda DWDM yana amfani da tazara mai tsauri ta tsawon rai don sanya ƙarin tashoshi a kan zare ɗaya.
Maimakon tazarar tashar 20 nm da ake amfani da ita a cikin CWDM (daidai da kusan GHz miliyan 15), tsarin DWDM yana amfani da tazarar tashoshi daban-daban da aka ƙayyade daga 12.5 GHz zuwa 200 GHz a cikin C-Band kuma wani lokacin L-band.
Tsarin DWDM na yau yawanci yana tallafawa tashoshi 96 waɗanda ke da tazara tsakanin 0.8 nm a cikin bakan C-Band na 1550 nm. Saboda haka, tsarin DWDM na iya aika adadi mai yawa na bayanai ta hanyar haɗin fiber guda ɗaya saboda suna ba da damar a haɗa ƙarin raƙuman ruwa da yawa a kan zare ɗaya.
DWDM ya fi dacewa don sadarwa mai nisa har zuwa kilomita 120 ko fiye saboda ikonsa na amfani da na'urorin ƙara haske, waɗanda za su iya ƙara girman dukkan 1550 nm ko C-band spectrum wanda aka saba amfani da shi a aikace-aikacen DWDM cikin farashi mai kyau. Wannan yana shawo kan dogon zangon ragewa ko nisa kuma lokacin da aka haɓaka shi da Erbium Doped-Fiber Amplifiers (EDFAs), tsarin DWDM yana da ikon ɗaukar adadi mai yawa na bayanai a tsawon nisa har zuwa ɗaruruwan ko dubban kilomita.
Baya ga ikon tallafawa adadi mai yawa na tsawon rai fiye da CWDM, dandamalin DWDM kuma suna da ikon sarrafa manyan hanyoyin gudu kamar yadda yawancin masu siyar da kayan aikin jigilar gani a yau galibi suna tallafawa 100G ko 200G a kowace tsawon rai yayin da fasahohin da ke tasowa ke ba da damar 400G da ƙari.
Bakan zangon DWDM da CWDM:
CWDM yana da faɗin tazarar tashoshi fiye da DWDM -- bambancin da ba a saba gani ba a mita ko tsawon rai tsakanin tashoshi biyu masu kama da juna.
Tsarin CWDM yawanci yana ɗaukar tsawon raƙuman ruwa guda takwas tare da tazarar tashoshi na 20 nm a cikin grid ɗin bakan daga 1470 nm zuwa 1610 nm.
Tsarin DWDM, a gefe guda, zai iya ɗaukar tsawon tsayi 40, 80, 96 ko har zuwa 160 ta hanyar amfani da ƙaramin tazara mai girman 0.8/0.4 nm (100 GHz/50 GHz grid). Tsawon tsayin DWDM yawanci yana daga 1525 nm zuwa 1565 nm (C-band), tare da wasu tsarin kuma suna iya amfani da tsawon tsayi daga 1570 nm zuwa 1610 nm (L-band).
Amfanin CWDM:
1. Ƙarancin Kuɗi
CWDM ya fi DWDM araha sosai saboda farashin kayan aiki. Tsarin CWDM yana amfani da laser mai sanyaya wanda ya fi rahusa fiye da laser ɗin DWDM mara sanyaya. Bugu da ƙari, Farashin transceivers na DWDM yawanci ya fi tsada sau huɗu ko biyar fiye da na na'urorin CWDM ɗinsu. Ko da farashin aiki na DWDM ya fi CWDM . Don haka CWDM zaɓi ne mai kyau ga waɗanda ke da ƙarancin kuɗi.
2. Bukatar Wutar Lantarki
Idan aka kwatanta da CWDM, buƙatun wutar lantarki na DWDM sun fi yawa. Ganin cewa na'urorin laser na DWDM tare da na'urorin saka idanu da na'urorin sarrafawa suna cinye kusan 4 W a kowace tsayin igiyar ruwa. A halin yanzu, na'urar watsa laser ta CWDM mara sanyaya tana amfani da kusan 0.5 W na wutar lantarki. CWDM fasaha ce mai aiki ba tare da amfani da wutar lantarki ba. Tana da tasiri mai kyau ga masu amfani da intanet.
3. Sauƙin Aiki
Tsarin CWDM yana amfani da fasaha mafi sauƙi idan aka kwatanta da DWDM. Yana amfani da LED ko Laser don samar da wutar lantarki. Matatun raƙuman ruwa na tsarin CWDM sun ƙanana kuma sun fi araha. Don haka suna da sauƙin shigarwa da amfani.
Fa'idodin DWDM:
1. Ingantawa Mai Sauƙi
DWDM yana da sassauƙa kuma mai ƙarfi dangane da nau'ikan zare. Haɓaka DWDM zuwa tashoshi 16 yana da amfani akan zare G.652 da G.652.C. Asalinsa shine cewa DWDM koyaushe yana amfani da yankin ƙarancin asarar zare. Yayin da tsarin CWDM na tashoshi 16 ya haɗa da watsawa a yankin 1300-1400nm, inda raguwar ta fi girma sosai.
2. Ƙarfin daidaitawa
Magani na DWDM yana ba da damar haɓakawa a matakai na tashoshi takwas zuwa matsakaicin tashoshi 40. Suna ba da damar jimillar ƙarfin fiber fiye da mafita na CWDM.
3. Nisan Watsawa Mai Dogon Lokaci
DWDM yana amfani da madaurin wavelength 1550 wanda za'a iya ƙarawa ta amfani da na'urorin ƙara haske na yau da kullun (EDFA's). Yana ƙara nisan watsawa zuwa ɗaruruwan kilomita.
Hoton da ke ƙasa zai ba ku damar fahimtar bambance-bambancen da ke tsakanin CWDM da DWDM.
Lokacin Saƙo: Yuni-14-2022