Sehokelo sa fiber optic

1. Mokhoa oa phetiso

E bua ka mokhoa oa phetisetso ea leseli ka har'a likhoele tsa optical (foromo ea kabo ea tšimo ea motlakase).Fiber ea puisano e sebelisoang hangata

mekhoa e arotsoe ka mokhoa o le mong le multimode, ka mokhoa o le mong o loketseng phetiso ea nako e telele le multimode e loketseng

phetiso ya nako e kgutshwane.G652D single mode optical fibers e na le core diameter d1 ea 9 um le cladding bophara d2 ea 125 um.Multimode

likhoele tsa optical hangata li arotsoe ka mefuta e 'meli: 62.5/125 kapa 50/125.

Khetho ea optical fiber mode e tlameha ho ts'oana le module ea optical, ho seng joalo e tla baka tahlehelo e eketsehileng ka lebaka la ho se lumellane ha core diameter.

Khokahano lipakeng tsa likhoele tsa optical le likhoele tse nang le li-diameter tse fapaneng tsa mantlha ha lia khothaletsoa.

2. Tahlehelo ea ho kenya

Palo ea phokotso ea matla a lets'oao la optical, hangata e hlahisoang ka li-decibel, ha ho sebelisoa lihokelo tsa fiber optic bakeng sa likhokahano.Ka mohlala,

ha tahlehelo ea ho kenya e le 3dB, tahlehelo ea matla a optical e ka bang 50%.Ha tahlehelo ea ho kenya e le 1dB, tahlehelo ea matla e batla e le

20%, le IL=- 10lg (output optical power/input optical power).

3. Khutlisetsa tahlehelo

E boetse e tsejoa e le tahlehelo ea ponahalo, e bua ka paramethara ea ts'ebetso ea lets'oao.Echo tahlehelo e hlalosa chelete e khutlisitsoeng ke ba

lets'oao la optical ha le khutlela tseleng ea pele.Ka kakaretso, boleng bo boholo, bo molemo.Ka mohlala, ha ho kenya matla a 1mw, 10% ea eona ke

e bonts'itsoeng morao, e leng 10dB, le 0.003% e bonts'oa morao, e bakang tahlehelo ea echo e ka bang 45dB.RL=- 10lg (matla a khanyang a bonts'itsoeng/

matla a lebone a kenyang)

4. Mofuta oa sefahleho

Mefuta e ka holimo ea fiber e arotsoe ka PC (spherical surface grinding) le APC (oblique spherical surface grinding).Ka mor'a hore APC e sila,

lebone le bonts'itsoeng le khutlang tseleng ea mantlha le fokotsehile haholo, e leng ho thusang ho ntlafatsa tahlehelo ea sehokelo.