Da farko, muna buƙatar fahimtar sigogi daban-daban nana gani kayayyaki, wanda akwai nau'ikan nau'ikan nau'ikan guda uku (Tsakiyar Waƙoƙi, nesa nesa, ƙimar watsa abubuwa), kuma manyan bambance-bambance a tsakanin waɗancan maki.

1. Tsawon zangon tsakiya

Naúrar tsakiyar zangon nanometer (nm), a halin yanzu akwai manyan nau'ikan guda uku:

1) 850nm (MM,Multi-yanayin, Ƙananan farashi amma ɗan gajeren nisa watsawa, gabaɗaya watsawar 500m kawai;

2) 1310nm (SM, yanayin guda ɗaya, babban hasara amma ƙananan tarwatsewa yayin watsawa, gabaɗaya ana amfani dashi don watsawa cikin 40km);

3) 1550nm (SM, yanayin guda ɗaya, ƙarancin hasara amma babban tarwatsewa yayin watsawa, galibi ana amfani dashi don watsa nesa sama da 40km, kuma mafi nisa ana iya watsa shi kai tsaye ba tare da relay 120km ba).

2. Nisa watsawa

Nisan watsawa yana nufin nisa da za a iya watsa siginar gani kai tsaye ba tare da ƙarawa ba. Naúrar kilomita ne (kuma ana kiranta kilomita, km). Na'urorin gani gabaɗaya suna da ƙayyadaddun bayanai: Multi-mode 550m, yanayin guda ɗaya 15km, 40km, 80km da 120km, da sauransu. Jira.

3. Yawan watsawa

Adadin watsawa yana nufin adadin bits (bits) na bayanan da ake yadawa a cikin daƙiƙa guda, a cikin bps. Yawan watsawa yana da ƙasa da 100M kuma ya kai 100Gbps. Akwai ma'auni huɗu da aka saba amfani da su: 155Mbps, 1.25Gbps, 2.5Gbps da 10Gbps. Yawan watsawa gabaɗaya yana ƙasa. Bugu da kari, akwai nau'ikan gudu guda 3 na 2Gbps, 4Gbps da 8Gbps don na'urori masu gani a cikin tsarin ajiya na gani (SAN).

Bayan fahimtar sigogin na'urorin gani guda uku na sama, kuna da fahimtar farko game da na'urar gani? Idan kuna son ƙarin fahimta, bari mu kalli sauran sigogin na'urar gani!

1.Asara da watsawa: Dukansu sun fi shafar nisan watsawar na'urar gani. Gabaɗaya, ana ƙididdige asarar hanyar haɗin gwiwa a 0.35dBm/km don ƙirar ƙirar 1310nm, kuma ana ƙididdige asarar hanyar haɗin gwiwa a 0.20dBm/km don ƙirar gani na 1550nm, kuma ana ƙididdige ƙimar watsawa Mai rikitarwa, gabaɗaya don tunani kawai;

2.Asara da tarwatsawar chromatic: Waɗannan sigogi guda biyu ana amfani da su galibi don ayyana nisan watsawa na samfurin, watsiwar gani na kayan gani na gani tare da tsayin raƙuman ruwa daban-daban, ƙimar watsawa da nisan watsawa Power da karɓar hankali zai bambanta;

3.Laser category: A halin yanzu, mafi yawan amfani da Laser shine FP da DFB. Kayan semiconductor da tsarin resonator na biyu sun bambanta. Laser na DFB suna da tsada kuma ana amfani da su galibi don na'urorin gani tare da nisan watsawa fiye da 40km; yayin da Laser FP ba su da arha, Gabaɗaya ana amfani da su don kayan aikin gani tare da nisan watsawa na ƙasa da 40km.

4. Optical fiber interface: SFP Optical modules su ne duk LC musaya, GBIC na gani modules duk SC musaya ne, da sauran musaya sun hada da FC da ST;

5. Rayuwar sabis na ƙirar gani: daidaitattun daidaituwa na duniya, 7 × 24 hours na aikin da ba a katsewa ba don sa'o'i 50,000 (daidai da shekaru 5);

6. Muhalli: Yanayin aiki: 0 ~ + 70 ℃; Adana zafin jiki: -45 ~ + 80 ℃; Wutar lantarki mai aiki: 3.3V; Matsayin aiki: TTL.

Don haka dangane da gabatarwar da ke sama zuwa sigogin kayan gani na gani, bari mu fahimci bambanci tsakanin SFP Optical module da SFP+.

1.Ma'anar SFP

SFP (Small form-factor pluggable) yana nufin ƙaramin nau'i-nau'i pluggable. Module ne mai toshewa wanda zai iya tallafawa Gigabit Ethernet, SONET, Fiber Channel da sauran ka'idojin sadarwa da toshe cikin tashar jiragen ruwa na SFP.canza. Ƙididdigar SFP ta dogara ne akan IEEE802.3 da SFF-8472, wanda zai iya tallafawa gudu zuwa 4.25 Gbps. Saboda ƙaramin girmansa, SFP yana maye gurbin Gigabit Interface Converter (GBIC) na gama gari a baya, don haka ana kiransa mini GBIC SFP. Ta zabiFarashin SFPtare da daban-daban wavelengths da tashoshin jiragen ruwa, guda lantarki tashar jiragen ruwa a kancanzaza a iya haɗa su zuwa masu haɗawa daban-daban da filaye na gani na tsawon zango daban-daban.

2.Ma'anar SFP+

Saboda SFP kawai yana goyan bayan adadin watsawa na 4.25 Gbps, wanda ba zai iya biyan buƙatun mutane don saurin hanyar sadarwa ba, an haifi SFP + a ƙarƙashin wannan bangon. Matsakaicin adadin watsawa naSFP+iya isa 16 Gbps. A zahiri, SFP+ shine ingantaccen sigar SFP. Bayanin SFP+ ya dogara ne akan SFF-8431. A mafi yawan aikace-aikace a yau, SFP + modules yawanci suna goyan bayan 8 Gbit / s Fiber Channel. Tsarin SFP + ya maye gurbin XENPAK da XFP kayayyaki waɗanda aka fi amfani da su a farkon 10 Gigabit Ethernet saboda ƙananan girmansa da amfani mai dacewa, kuma ya zama mafi mashahuri na gani module a cikin 10 Gigabit Ethernet.

Bayan nazarin ma'anar da ke sama na SFP da SFP +, ana iya kammala cewa babban bambanci tsakanin SFP da SFP + shine yawan watsawa. Kuma saboda mabanbantan adadin bayanai, aikace-aikace da nisan watsawa su ma sun bambanta.