Maqhubu a khanya ke mahlaseli a motlakase a hlahisoang ke lielektrone nakong ea ho sisinyeha ha athomo.Ho tsamaea ha lielektrone liathomong tsa lintho tse sa tšoaneng ho fapane, kahoo maqhubu a khanya ao li a ntšang le ’ona a fapane.
Spectrum ke mohlala oa khanya ea monochromatic e arohanngoa ke mokhoa oa ho hasana (joaloka prism le grating) ka mor'a hore leseli la polychromatic le aroloe ke mokhoa oa ho hasana, o hlophisitsoeng ka ho latellana ho ea ka bolelele ba maqhubu (kapa maqhubu).E bitsoa optical spectrum ka botlalo.
Ha re leka transmitter tosa, hangata re kenyelletsa parameter, SMSR (Side Mode Suppression Ratio).Karo-karolelano ea boleng bo phahameng ba matla a mokhoa o ka sehloohong ho matla a mokhoa oa lehlakoreng o bitsoa karo-karolelano ea khatello ea mokhoa oa lehlakoreng, e leng pontšo ea bohlokoa ea ts'ebetso ea mokhoa oa longitudinal.Ka kakaretso, ha u lekanya karo-karolelano ea ho hana mokhoa oa lehlakore, e hloka ho sebelisoa hammoho le letšoao le tlhahlobo ho spectral analyzer.Moetsi o sebelisetsoa ho khetholla tlhōrō ea maqhubu a bohareng le tlhōrō e phahameng ka ho fetisisa ea maqhubu a bobeli.Bala litlhōrō tse peli.Karolelano ea ho hana mokhoa oa lehlakore ke phapang ea boemo ba matla lipakeng tsa litlhoro tse peli.E ka baloa ka likhetho tse nyane ha ho hlahlojoa.
E hlalosoa e le karo-karolelano ea matla a ka sehloohong a longitudinal mode optical M1 le matla a feletseng a lehlakoreng la optical M2 tlas'a boemo ba ho feto-fetoha ka ho feletseng.
Foromo ea lipalo ke:
SMSR=10*lg(M1/M2)
Ho transmitter ea optical, ka kakaretso ho hlalosoa hore SMSR e kholo ho feta 30dB;ke hore, matla a optical a mokhoa o ka sehloohong oa longitudinal ke makhetlo a fetang 1000 ho feta matla a optical side mode.Ha boleng ba SMSR bo phahame, tsela ea leseli e tsepamisitsoe haholoanyane.Joalokaha ho bontšitsoe setšoantšong se ka tlase: SMSR ke 51dB
E ka holimo ke tlhaloso ea tsebo ea Lightwave e tlisoang ke Shenzhen HDV Phoelectron Technology Co., Ltd., e leng moetsi oa puisano oa optical le ho hlahisa k'hamphani ea lihlahisoa tsa puisano.Rea u amohela ho etela ronaleqephe la sehlahisoa.Ke leboha ho bala sehlooho sena.