Optical fiber kutaurirana, seimwe yembiru huru dzekutaurirana kwemazuva ano, inoita basa rakakosha mumatanho emazuva ano ekufonera.
Iyo yekusimudzira maitiro eiyo optical fiber kutaurirana inogona kutarisirwa kubva kune zvinotevera zvinhu.
1.Kuti uone kuwedzera kwehuwandu hwemashoko uye kuendesa kure-kure, fiber imwe-mode ine kurasikirwa kwakaderera uye kupararira kwakaderera kunofanira kushandiswa. Parizvino, G.652 yakajairika-mode optical fiber inoshandiswa zvakanyanya mukukurukurirana network optical cable lines. Kunyangwe iyi fiber ine kushomeka kwekurasikirwa kwe1.55 μm, ine yakakura yekuparadzira kukosha kweanosvika 18 ps / (nm.km). Zvinonzi kana iyo yakajairwa single-mode fiber inoshandiswa pawavelength ye1.55 μm, iyo yekufambisa kuita haina kunaka.
Kana zero-dispersion wavelength yakashandurwa kubva 1.31 μm kusvika 1.55 μm, inonzi dispersion-shifted fiber (DSF), asi kana iyi fiber uye erbium-doped fiber amplifier (EDFA) inoshandiswa mune wavelength division multiplexing system (WDM) , ichaita Nekuda kwekusagadzikana kwefiber, ina-wave mixing inoitika, iyo inodzivirira kushandiswa kwemaitiro eWDM, zvinoreva kuti zero fiber dispersion haisi yakanaka kune WDM.
Kuti iyo optical fiber communication technology ibudirire kushandiswa kuWDM system, fiber dispersion inofanira kuderedzwa, asi haibvumirwi kuva zero. Nokudaro, iyo itsva single-mode fiber yakagadzirwa inonzi non-zero dispersion fiber (NZDF), iyo inobva ku1.54 ~ The dispersion value in the 1.56μm range inogona kuchengetedzwa pa 1.0 ~ 4.0ps / (nm.km), iyo inodzivisa. iyo zero yekuparadzira nzvimbo, asi inochengetedza diki yekuparadzira kukosha.
Mienzaniso mizhinji yakataurwa pachena pachishandiswa NZDF's EDFA / WDM transmission system.
2.Photonic midziyo inoshandiswa mu optical fiber communication systems yakagadzirwawo zvakanyanya mumakore achangopfuura. Kuti zvizadzise zvinodiwa zveWDM masisitimu, ma-multi-wavelength light source madivayiri (MLS) akagadzirwa mumakore achangopfuura. Iyo inonyanya kuronga akawanda laser machubhu mune array uye inoita yakasanganiswa yakasanganiswa yemaziso chikamu nenyeredzi coupler.
Kumagumo ekugamuchira kweiyo optical fiber yekutaurirana system, iyo photodetector uye preamplifier inonyanya kugadzirwa munzira yekumhanya-mhanya kana yakakura-bhendi mhinduro. PIN photodiodes inogona kuramba ichizadzisa zvinodiwa mushure mekuvandudzwa. Kune Broadband photodetectors inoshandiswa murefu-wavelength 1.55μm bhendi, simbi semiconductor-metal photodetection chubhu (MSM) yakagadzirwa mumakore achangopfuura. Kufamba wave akagovera photodetector. Sekureva kwemishumo, iyi MSM inogona kuona 78dB ye3dB frequency bandwidth ye1.55μm masaisai emwenje.
Iyo FET's preamplifier ingangotsiviwa nehigh electron mobility transistor (HEMT). Zvinonzi 1.55μm optoelectronic receiver inoshandisa MSM detector uye HEMT pre-amplified optoelectronic integration (OEIC) maitiro ane frequency bhendi ye38GHz uye inotarisirwa kusvika 60GHz.
3. Iyo point-to-point transmission PDH system mu optical fiber communication system haina kukwanisa kuenderana nekugadzirwa kwemazuva ano ekufambisa nhare. Naizvozvo, kuvandudzwa kwe optical fiber kutaurirana kune network yave maitiro asingadzivisike.
SDH imhando-nyowani yekufambisa network bumbiro rine hunhu hwekuita network. Iyo yakazara ruzivo network inobatanidza multiplexing, mitsara yekufambisa uye kushandura mabasa uye ine yakasimba network manejimendi masimba. Parizvino iri kushandiswa zvakanyanya.