Ke engphetoho ea lasertheknoloji
Leseli ke mofuta oa leqhubu la motlakase le nang le maqhubu a phahameng. Le na le kutloano e ntle haholo 'me kahoo, joalo ka maqhubu a motlakase a fetileng (joalo ka li-radio le lithelevishene), le ka sebelisoa e le mojari oa ho fetisa tlhahisoleseling. Tlhahisoleseling e "jaroang" ke laser (ho kenyeletsoa puo, mongolo, litšoantšo, matšoao, jj.) e romeloa ho moamoheli ka liteishene tse itseng tsa phetisetso (sepakapaka, likhoele tsa optical, jj.), ebe e tsejoa le ho khutlisetsoa tlhahisoleselingng ea pele ke moamoheli oa optical. Ts'ebetso ea ho kenya tlhahisoleseling ho laser e bitsoa modulation, 'me sesebelisoa se phethang ts'ebetso ena se bitsoa modulator. Har'a tsona, laser e bitsoa leqhubu la mojari; Tlhahisoleseling ea maqhubu a tlase e bapalang karolo ea taolo e bitsoa lets'oao le fetotsoeng.
Modulation ea laser e ka aroloa ka modulation ea ka hare le modulation ea kantle.
Modulation ea ka Hare: E bua ka ho jarisoa ha matšoao a fetotsoeng nakong ea ts'ebetso ea ho sisinyeha ha laser, ke hore, ho sebelisa matšoao a fetotsoeng ho fetola liparamente tsa ho sisinyeha ha laser, ka hona ho fetola litšobotsi tsa tlhahiso ea laser ho fihlela modulation. Mekhoa ea modulation ea ka hare e kenyelletsa: 1. Ho laola ka kotloloho phepelo ea motlakase ea pompo ea laser ho fihlela matla a laser e hlahisoang e fetotsoeng. Matla le boteng ba tlhahiso kaofela li laoloa ke phepelo ea motlakase. Haeba lets'oao le lokelang ho fetisoa le sebelisoa ho laola phepelo ea motlakase ea laser, ho etsa liphetoho tsa hona joale ka laser e laoloang ke lets'oao, joale laser e ntšitsoeng le eona e tla laoloa ke lets'oao. 2. Likarolo tsa modulation li beoa ka har'a cavity ea resonant, 'me thepa ea' mele ea likarolo tsa modulation e laoloa ke matšoao a ho fetoha, ka hona ho fetola liparamente tsa cavity ea resonant le ho fetola litšobotsi tsa tlhahiso ea laser ho fihlela modulation. Molemo oa modulation ea ka hare ke bokhoni ba eona bo phahameng ba modulation. Bothata ke hore kaha modulator e kentsoe ka hare ho cavity, e lekana le ho eketsa tahlehelo ka hare ho cavity, ho fokotsa matla a tlhahiso, 'me bandwidth ea modulator e lekanyelitsoe ke passband ea cavity ea resonant.
Modulation ea Kantle: E bolela ho beoa ha modulator tseleng ea optical ka ntle ho laser ka mor'a hore laser e thehoe, 'me litšobotsi tsa' mele tsa modulator li fetoloa ke lets'oao la modulation. Ha laser e feta ka har'a modulator, paramethara e itseng ea leqhubu la leseli e tla fetoloa. Molemo oa modulation ea ka ntle ke hore ha e ame matla a tlhahiso ea laser 'me bandwidth ea jenereithara ha e lekanyetsoe ke passband ea cavity ea resonant. Bothata ke bokhoni bo tlase ba modulation.
Ho feto-fetoha ha laser ho ka aroloa ka ho feto-fetoha ha amplitude, ho feto-fetoha ha maqhubu, ho feto-fetoha ha phase le ho feto-fetoha ha matla, jj. ho latela mofuta oa eona oa ho feto-fetoha. Li-modulator tse tloaelehileng tse tsamaellanang li kenyelletsali-modulator tsa mohato, li-modulator tsa matlajj. Ntle le phetoho ya matla a electro-optic e boletsweng ka hodimo le phetoho ya mohato wa electro-optic, ho na le mefuta e mengata yali-modulator tsa laser, joalo ka ho tšelali-modulator tsa electro-optic, di-modulator tsa maqhubu a tsamayang ka motlakase, di-modulator tsa electro-optic tsa Kerr, di-modulator tsa acousto-optic, di-modulator tsa magneto-optic, di-modulator tsa tshitiso le di-modulator tsa lesedi la sebaka, jj.
Nako ea poso: Mots'eanong-13-2025