A fagen sadarwa, haɗin cibiyar bayanai, da jigilar bidiyo, fiber optic cabling yana da matuƙar kyawawa. Koyaya, gaskiyar ita ce kebul na fiber optic ba shine zaɓi na tattalin arziki ko mai yuwuwa don aiwatarwa ga kowane sabis na ɗaiɗaiku ba. Don haka yin amfani da Multiplexing na Wavelength Division (WDM) don faɗaɗa ƙarfin fiber akan abubuwan da ke akwai na fiber yana da kyau sosai. WDM fasaha ce da ke ninka siginonin gani da yawa akan fiber guda ta amfani da tsayin tsayi daban-daban na hasken Laser. Za a sanya binciken da sauri na filayen WDM akan CWDM da DWDM. Sun dogara ne akan ra'ayi iri ɗaya na yin amfani da madaidaicin raƙuman haske akan fiber guda ɗaya. Amma duka biyun suna da cancantarsu da rashin cancanta.
Menene CWDM?
CWDM yana tallafawa har zuwa tashoshi masu tsayi na 18 da ake watsa ta hanyar fiber a lokaci guda. Don cimma wannan, mabanbantan raƙuman ruwa na kowane tashoshi suna da 20nm baya. DWDM, tana tallafawa har zuwa tashoshi na tsawon lokaci guda 80, tare da kowane tashoshi kawai 0.8nm baya. Fasahar CWDM tana ba da mafita mai dacewa kuma mai tsada don gajeriyar nisa har zuwa kilomita 70. Don nisa tsakanin kilomita 40 zuwa 70, CWDM yana da iyakantacce ga tallafawa tashoshi takwas.
Tsarin CWDM yawanci yana goyan bayan tsawon zango takwas akan kowane fiber kuma an ƙera shi don sadarwa ta gajeriyar hanya, ta amfani da mitoci masu faɗi da tsayin raƙuman raƙuman raƙuman raƙuman ruwa.
Tun da CWDM ya dogara ne akan tazarar tashoshi 20-nm daga 1470 zuwa 1610 nm, yawanci ana tura shi akan filayen fiber har zuwa 80km ko ƙasa da haka saboda ba za a iya amfani da amplifiers na gani tare da manyan tashoshi masu tazara ba. Wannan faffadan tazarar tashoshi yana ba da damar amfani da na'urorin gani masu matsakaicin farashi. Koyaya, ƙarfin hanyoyin haɗin kai da kuma nesa da aka goyan baya sun yi ƙasa da CWDM fiye da DWDM.
Gabaɗaya, ana amfani da CWDM don ƙananan farashi, ƙananan ƙarfin aiki (ƙarancin-10G) da aikace-aikacen gajeriyar nesa inda farashi ke da mahimmanci.
Kwanan nan, farashin duka abubuwan CWDM da DWDM sun zama daidai gwargwado. Tsawon igiyoyin CWDM a halin yanzu suna iya ɗaukar har zuwa 10 Gigabit Ethernet da 16G Fiber Channel, kuma yana da wuya wannan ƙarfin ya ƙara ƙaruwa a nan gaba.
Menene DWDM?
Ba kamar CWDM ba, ana iya haɓaka haɗin DWDM kuma ana iya, sabili da haka, a yi amfani da su don watsa bayanai mai nisa da yawa.
A cikin tsarin DWDM, adadin tashoshi masu yawa suna da yawa fiye da CWDM saboda DWDM yana amfani da tazara mai tsayi don dacewa da ƙarin tashoshi akan fiber guda ɗaya.
Maimakon tazarar tazarar 20 nm da aka yi amfani da ita a cikin CWDM (daidai da kusan 15 miliyan GHz), tsarin DWDM yana amfani da tazara iri-iri da aka ƙayyade daga 12.5 GHz zuwa 200 GHz a cikin C-Band kuma wani lokacin L-band.
Tsarukan DWDM na yau yawanci suna tallafawa tashoshi 96 da aka raba su a 0.8 nm baya tsakanin 1550nm C-Band bakan. Saboda wannan, tsarin DWDM na iya watsa bayanai masu yawa ta hanyar hanyar haɗin fiber guda ɗaya yayin da suke ba da damar ƙarin tsayin raƙuman ruwa da yawa don a cushe kan fiber iri ɗaya.
DWDM shine mafi kyawu don sadarwa mai nisa har zuwa kilomita 120 da kuma bayansa saboda ikonta na yin amfani da na'urori masu auna firikwensin gani, wanda zai iya tsada-daidai da haɓaka duka 1550 nm ko C-band bakan da aka saba amfani da su a aikace-aikacen DWDM. Wannan ya shawo kan dogon lokaci na attenuation ko nisa kuma lokacin da Erbium Doped-Fiber Amplifiers (EDFAs) ya ƙarfafa shi, tsarin DWDM yana da ikon ɗaukar bayanai masu yawa a cikin nisa mai nisa har zuwa ɗaruruwa ko dubban kilomita.
Baya ga iyawar goyan bayan mafi girman adadin raƙuman raƙuman ruwa fiye da CWDM, dandamali na DWDM kuma suna da ikon sarrafa ka'idojin saurin sauri kamar yadda mafi yawan masu siyar da kayan sufuri na gani a yau suna tallafawa 100G ko 200G a kowane tsayi yayin da fasahohi masu tasowa ke ba da izinin 400G da ƙari.
DWDM vs CWDM bakan zango:
CWDM yana da faffadan tazarar tashoshi fiye da DWDM -- bambancin ƙima a mitar ko tsayi tsakanin tashoshi na gani biyu maƙwabta.
Tsarukan CWDM yawanci suna jigilar tsawon zango takwas tare da tazarar tasha na 20 nm a cikin grid bakan daga 1470 nm zuwa 1610 nm.
Tsarin DWDM, a gefe guda, na iya ɗaukar 40, 80, 96 ko har zuwa tsayin raƙuman ruwa 160 ta hanyar amfani da mafi kunkuntar tazarar 0.8/0.4 nm (grid 100 GHz/50 GHz). Tsawon raƙuman ruwa na DWDM yawanci daga 1525 nm zuwa 1565 nm (C-band), tare da wasu tsarin kuma suna iya amfani da tsayin raƙuman ruwa daga 1570 nm zuwa 1610 nm (L-band).
Amfanin CWDM:
1. Rahusa
CWDM ya fi DWDM rahusa saboda tsadar kayan masarufi. Tsarin CWDM yana amfani da na'urori masu sanyaya wanda ya fi rahusa fiye da DWDM laser mara sanyaya. Bugu da ƙari, Farashin masu karɓar DWDM yawanci ya fi sau huɗu ko biyar tsada fiye da na kayan aikin su na CWDM. Hatta farashin aiki na DWDM ya fi CWDM girma. Don haka CWDM kyakkyawan zaɓi ne ga waɗanda ke da iyaka a cikin kudade.
2. Bukatar Wutar Lantarki
Idan aka kwatanta da CWDM, buƙatun wutar lantarki don DWDM sun fi girma sosai. Kamar yadda lasers DWDM tare da haɗin gwiwar saka idanu da sarrafawa suna cinye kusan 4 W a kowane tsawon zango. A halin yanzu, mai watsa Laser CWDM mara sanyi yana amfani da kusan 0.5 W na wuta. CWDM fasaha ce mai wuce gona da iri wacce ba ta amfani da wutar lantarki. Yana da tasiri mai kyau na kuɗi ga ma'aikatan intanet.
3. Sauƙaƙe Aiki
Tsarin CWDM suna amfani da fasaha mafi sauƙi dangane da DWDM. Yana amfani da LED ko Laser don wutar lantarki. Tace kalaman na tsarin CWDM sun fi ƙanƙanta da rahusa. Don haka suna da sauƙin shigar da amfani da su.
Amfanin DWDM:
1. Sauƙaƙe Haɓakawa
DWDM mai sassauƙa ne kuma mai ƙarfi dangane da nau'ikan fiber. DWDM haɓakawa zuwa tashoshi 16 yana da amfani akan duka G.652 da G.652.C fibers. Asali daga gaskiyar cewa DWDM ko da yaushe yana amfani da ƙananan asarar yanki na fiber. Yayin da tsarin CWDM na tashar 16 ya ƙunshi watsawa a cikin yankin 1300-1400nm, inda attenuation ya fi girma.
2. Scalability
Abubuwan DWDM suna ba da damar haɓakawa a cikin matakai na tashoshi takwas zuwa iyakar tashoshi 40. Suna ba da izinin ƙarfin jimlar mafi girma akan fiber fiye da maganin CWDM.
3. Dogon Watsawa
DWDM tana amfani da bandeji mai tsayi 1550 wanda za'a iya ƙarawa ta amfani da na'urorin haɓaka na gani na al'ada (EDFA's). Yana haɓaka nisan watsawa zuwa ɗaruruwan kilomita.
Hoton da ke gaba zai ba ku ra'ayi na gani na bambance-bambance tsakanin CWDM da DWDM.
Lokacin aikawa: Juni-14-2022