I-fibre yemodi eyodwa: umgogodla wengilazi omaphakathi mncane kakhulu (ububanzi bomnyombo ngokuvamile buyi-9 noma i-10) μ m), imodi eyodwa kuphela ye-fiber optical ingadluliselwa.
Ukuhlakazwa kwe-intermodal ye-fiber yemodi eyodwa kuncane kakhulu, okufanele ukuxhumana okukude, kodwa kukhona nokuhlakazwa kwezinto ezibonakalayo kanye nokuhlakazeka kwe-waveguide.Ngale ndlela, i-fiber yemodi eyodwa inezidingo eziphezulu zobubanzi be-spectral nokuzinza komthombo wokukhanya, okungukuthi, ububanzi be-spectral kufanele bube buncane futhi ukuzinza kube kuhle.
Kamuva, kwatholakala ukuthi ku-1.31 μ Ku-M wavelength, ukuhlakazwa kwezinto ezibonakalayo kanye nokuhlakazwa kwe-waveguide ye-fiber yemodi eyodwa kukhona okuhle nokubi, futhi usayizi ufana ncamashi.Ngakho-ke, isifunda se-wavelength esingu-1.31 μ M sesiphenduke iwindi elisebenza kahle kakhulu lokuxhumana kwe-fiber optical, futhi futhi iyibhande eliyinhloko elisebenzayo lesistimu yokuxhumana ye-fiber optical 1.31μM imingcele eyinhloko ye-fiber evamile yemodi eyodwa inqunywa yi-ITU-T. kusincomo se-G652, ngakho lolu hlobo lwefayibha lubizwa nangokuthi i-G652 fiber.
Uma kuqhathaniswa ne-multimode fiber, i-fiber yemodi eyodwa ingasekela ibanga elide lokudlulisela.Kunethiwekhi engu-100Mbps Ethernet kanye ne-1G gigabit, i-fiber yemodi eyodwa ingasekela ibanga lokudlulisela elingaphezu kuka-5000m.
Ngokombono wezindleko, ngenxa yokuthi i-transceiver optical ibiza kakhulu, izindleko zokusebenzisa i-fiber optical yemodi eyodwa zizoba phezulu kune-multi-mode optical fiber cable.
Ukusatshalaliswa kwenkomba ye-refractive kufana nalokho kwefayibha eguquguqukayo, futhi ububanzi obuyisisekelo buyi-8 ~ 10 μ m kuphela.Ukukhanya kubhebhetheka eduze kwe-eksisi emaphakathi ye-fiber core ngendlela yomugqa.Ngenxa yokuthi lolu hlobo lwefayibha lungadlulisela imodi eyodwa kuphela (ukonakala kwezimo ezimbili ze-polarization), lubizwa ngokuthi i-fiber yemodi eyodwa, futhi ukuhlanekezela kwesignali yayo kuncane kakhulu.
Incazelo ye- "single-mode optical fiber" ezincwadini zezemfundo: ngokuvamile, uma i-V ingaphansi kuka-2.405, i-wave crest eyodwa kuphela edlula ku-fiber optical, ngakho ibizwa ngokuthi i-fiber optical yemodi eyodwa.Umongo wayo mncane kakhulu, cishe ama-microns angu-8-10, futhi ukuhlakazeka kwemodi kuncane kakhulu.Isici esiyinhloko esithinta ububanzi bebhendi yokudlulisa ye-fiber optical ukuhlakazeka okuhlukahlukene, futhi ukuhlakazeka kwemodi kubaluleke kakhulu, futhi ukuhlakazeka kwe-fiber optical yemodi eyodwa kuncane, Ngakho-ke, ukukhanya kungadluliselwa ibanga elide endaweni ebanzi. ibhande.
I-fiber optical yemodi eyodwa inobubanzi obuwumgogodla wama-microns angu-10, ongavumela ukudluliswa kwe-beam yemodi eyodwa futhi kunciphise imikhawulo yomkhawulokudonsa nokuhlakazeka kwe-modal.Kodwa-ke, ngenxa yobubanzi obuncane bomgogodla we-fiber optical yemodi eyodwa, kunzima ukulawula ukudluliswa kwe-beam, ngakho-ke kudinga i-laser ebiza kakhulu njengomthombo wokukhanya, futhi umkhawulo oyinhloko we-fiber optical yemodi eyodwa usekuhlakazweni kwezinto, I-Single. Intambo ye-optical mode ikakhulukazi isebenzisa i-laser ukuthola umkhawulokudonsa ophezulu.Ngenxa yokuthi i-LED izokhipha inombolo enkulu yemithombo yokukhanya enomkhawulokudonsa ohlukile, imfuneko yokusabalalisa impahla ibaluleke kakhulu.
Uma kuqhathaniswa ne-multimode fiber, i-fiber yemodi eyodwa ingasekela ibanga elide lokudlulisela.Kunethiwekhi engu-100Mbps Ethernet kanye ne-1G gigabit, i-fiber yemodi eyodwa ingasekela ibanga lokudlulisela elingaphezu kuka-5000m.
Ngokombono wezindleko, njengoba i-transceiver optical ibiza kakhulu, izindleko zokusebenzisa i-fiber optical yemodi eyodwa zizoba phezulu kune-multi-mode optical fiber cable.
I-fiber yemodi eyodwa (SMF)
Uma kuqhathaniswa ne-multimode fiber, ububanzi obuyinhloko be-fiber yemodi eyodwa buncane kakhulu, kuphela i-8 ~ 10 μ m. Ngoba imodi eyodwa kuphela edluliselwayo, akukho ukuhlakazeka kwe-inter mode, ukuhlakazeka okuncane okuphelele kanye nomkhawulokudonsa obanzi.I-fiber yemodi eyodwa isetshenziswa ku-1.3 ~ 1.6 μ Esifundeni se-wavelength sika-M, ngokusebenzisa idizayini efanele yokusabalaliswa kwenkomba ye-refractive ye-fiber optical kanye nokukhethwa kwezinto ezihlanzekile kakhulu ukuze kulungiswe ukuvala okukhulu izikhathi ezingu-7 kunomgogodla, ukulahlekelwa okuncane kanye nokuhlakazeka okuncane kungafinyelelwa ngesikhathi esifanayo kuleli bhendi.
I-fiber optical yemodi eyodwa isetshenziswa kuhlelo olukude nolusezingeni eliphezulu lokuxhumana ngefayibha, inethiwekhi yendawo yefiber optical kanye nezinzwa ezihlukahlukene zefiber optical.
Isikhathi sokuthumela: Mar-08-2022