1. Multimode fiber
Kana saizi yejometri yefiber (kunyanya iyo yepakati dhayamita d1) yakakura kupfuura yavelength yechiedza (inenge 1 µm), pachave nemadhazeni kana kunyange mazana enzira dzekuparadzira mufiber. Mhando dzakasiyana dzekuparadzira dzine kumhanya kwakasiyana uye nhanho, zvichikonzera kunonoka kwenguva uye kuwedzera kwemaoptical pulses mushure mekutapurirana kure-kure. Chiitiko ichi chinonzi modal dispersion (inozivikanwawo se intermodal dispersion) yeoptical fiber.
Modal dispersion ichapfupisa bandwidth yemultimode fiber uye kuderedza kutapurirana kwayo, saka multimode fiber inokodzera chete diki-chaiyo fiber optic kutaurirana.
Iyo refractive index distribution ye multimode fiber inonyanya kugovera parabolic, kureva, graded refractive index distribution. Iyo dhayamita yepakati yayo inenge 50 µm.
2. Singlemode fiber
Kana iyo geometric saizi yefiber (kunyanya dhayamita yepakati) inogona kuva pedyo newavelength yechiedza, semuenzaniso, iyo dhayamita yepakati d1 iri muhupamhi hwe5-10 µm, iyo fiber inongobvumira imwe modhi (yakakosha mode HE11) kuti iparadzire mairi, uye mamwe ose epamusoro-soro modes akagurwa, mafiber akadaro anonzi single-mode fibers.
Sezvo iine imwe nzira yekuparadzira uye inodzivirira dambudziko rekupararira kwemodhi, single-mode fiber ine yakanyanyisa bandwidth uye inonyanya kukodzera kune yakakwirira-capacity fiber optic communications. Nokudaro, kuti uwane kutumirwa kwe-single-mode, iyo fiber parameters inofanira kusangana nemamwe mamiriro ezvinhu Inoverengwa nemaitiro ekuti kune fiber ine NA = 0.12 kuti iwane imwe-mode transmission pamusoro pe λ = 1.3 µm, Iyo radius yefiber core inofanira. ive ≤4.2 µm, kureva kuti, pakati payo dhayamita d1≤8.4 µm.
Sezvo iyo yepakati dhayamita ye-single-modhi optical fiber idiki kwazvo, zvakaomesesa zvinodiwa zvinoiswa pakuita kwayo kugadzira.
Nguva yekutumira: Jan-10-2023
