Nhanganyaya kuRF pamusoro pefiber System

Nhanganyaya kuRF pamusoro pefiber System

RF pamusoro pe fiberndeimwe yeakakosha maapplication emicrowave photonics uye anoratidza mabhenefiti asingaenzaniswi muminda yepamusoro senge microwave photonic radar, astronomical radio telephoto, uye unmanned aerial motokari kutaurirana.

Iyo RF pamusoro pe fiberROF linkinonyanya kuumbwa neoptical transmitters, optical receivers uye optical cables. Sezvakaratidzwa mumufananidzo 1.

Optical transmitters: Yakagoverwa mhinduro lasers (DFB laser) anoshandiswa mune yakaderera-ruzha uye yakakwirira-simba renji mashandisirwo, nepo FP lasers anoshandiswa mukushandisa ane zvakaderera zvinodiwa. Aya lasers ane wavelengths ye1310nm kana 1550nm.

Optical receiver: Kune imwe magumo eiyo optical fiber link, mwenje unoonekwa nePIN photodiode yemugamuchiri, iyo inoshandura mwenje kudzoka kuita ikozvino.

Optical cables: Kusiyana ne multimode fibers, single-mode fibers inoshandiswa mumutsara wekubatanidza nekuda kwekupararira kwavo kwakaderera uye kurasikirwa kwakaderera. Pakureba kwe1310nm, kuderedzwa kwechiratidzo che optical mufiber optical iri pasi pe0.4dB/km. Pa1550nm, iri pasi pe0.25dB/km.

Iyo ROF link ndeye mutsara wekutumira system. Zvichienderana nehunhu hwekutapurirana mutsara uye kufambisa kwemaziso, iyo ROF link ine zvinotevera tekinoroji zvakanakira:

• Kurasikirwa kwakanyanya kwakaderera, nefiber attenuation isingasviki 0.4 dB / km

• Optical fiber ultra-bandwidth transmission, optical fiber kurasikirwa inozvimiririra nehuwandu

Iyo link ine yakakwira chiratidzo chekutakura simba / bandwidth, kusvika kuDC kusvika ku40GHz

• Anti-electromagnetic interference (EMI) (Hapana chiratidzo chinokanganisa mumamiriro ekunze akaipa)

• Mutengo wakaderera pamita imwe • Mafibhi eOptical anosanduka uye anoreruka, anorema ingangoita 1/25 yemawaveguides uye 1/10 yetambo dzekoaxial.

• Marongerwo akareruka uye anochinjika (yezvokurapa uye nemakanika ekufungidzira masisitimu)

Zvinoenderana nekuumbwa kweiyo optical transmitter, iyo RF pamusoro pefiber system yakakamurwa kuita mhando mbiri: yakananga modulation uye yekunze modulation. Iyo optical transmitter yeiyo yakananga-modulated RF pamusoro pefiber system inotora yakananga-modulated DFB laser, ine zvakanakira mutengo wakaderera, saizi diki uye nyore kubatanidza, uye yakashandiswa zvakanyanya. Nekudaro, zvakaganhurirwa neiyo yakananga-modulated DFB laser chip, iyo yakananga-modulated RF pamusoro pe fiber inogona chete kuiswa mu frequency bhendi pazasi 20GHz. Kana ichienzaniswa neyakananga modulation, iyo yekunze modulation RF pamusoro pefiber optical transmitter inoumbwa neiyo-frequency DFB laser uye electro-optic modulator. Nekuda kwekukura kweelectro-optic modulator tekinoroji, iyo yekunze modulation RF pamusoro pefiber system inogona kuita maapplication mu frequency bhendi yakakura kupfuura 40GHz. Nekudaro, nekuda kwekuwedzera kweiyoelectro-optic modulator, iyo sisitimu yakanyanya kuoma uye haigone kushandisa. ROF yekubatanidza kuwana, ruzha nhamba uye simba renji rakakosha paramita yeROF link, uye pane hukama hwepedyo pakati pevatatu. Semuyenzaniso, chimiro cheruzha chakaderera chinoreva huwandu hwakakura hwesimba, nepo kuwana kwakakwirira kusingangodiwe chete nehurongwa hwese, asi zvakare kune simba guru pane mamwe maitiro ehurongwa.