Modulator ea Optical, e sebediswang ho laola matla a lesedi, ho arola electro-optic, thermooptic, acoustooptic, tsohle tse bonahalang, khopolo ya motheo ya phello ya electro-optic.
Modulator ea mahlo ke e 'ngoe ea lisebelisoa tsa bohlokoa ka ho fetisisa tsa mahlo tse kopantsoeng puisanong ea optical e potlakileng le e khutšoanyane. Modulator ea leseli ho latela molao-motheo oa eona oa modulation, e ka aroloa ka electro-optic, thermooptic, acoustooptic, tsohle tse bonahalang, jj., li thehiloe khopolo-taba ea motheo ke mefuta e fapaneng ea phello ea electro-optic, phello ea acoustooptic, phello ea magnetooptic, phello ea Franz-Keldysh, phello ea quantum Stark, phello ea carrier dispersion.
Themodulator ea electro-opticalke sesebelisoa se laolang index ea refractive, absorptivity, amplitude kapa mohato oa khanya e hlahisoang ka phetoho ea motlakase kapa tšimo ea motlakase. E phahametse mefuta e meng ea li-modulator mabapi le tahlehelo, tšebeliso ea matla, lebelo le kopanyo, 'me hape ke modulator e sebelisoang haholo hajoale. Ts'ebetsong ea phetiso ea optical, phetiso le kamohelo, modulator ea optical e sebelisoa ho laola matla a khanya, 'me karolo ea eona ke ea bohlokoa haholo.
Morero oa ho fetola khanya ke ho fetola lets'oao le lakatsehang kapa tlhahisoleseling e fetisoang, ho kenyeletsoa "ho felisa lets'oao la bokamorao, ho felisa lerata, le ho thibela tšitiso", e le ho etsa hore ho be bonolo ho sebetsana, ho fetisa le ho lemoha.
Mefuta ea li-modulation e ka aroloa ka mekhahlelo e 'meli e meholo ho latela hore na tlhahisoleseling e kentsoe hokae leqhubung la leseli:
E 'ngoe ke matla a ho khanna a mohloli oa leseli a fetoloang ke lets'oao la motlakase; E 'ngoe ke ho fetola phatlalatso ka kotloloho.
Ea pele e sebelisoa haholo-holo bakeng sa puisano ea optical, 'me ea bobeli e sebelisoa haholo-holo bakeng sa ho lemoha optical. Ka bokhutšoanyane: phetoho ea ka hare le phetoho ea kantle.
Ho ea ka mokhoa oa ho fetola molumo, mofuta oa ho fetola molumo ke:
3) Ho feto-fetoha ha polarization;
4) Ho feto-fetoha ha maqhubu le bolelele ba wavelength.
1.1, ho feto-fetoha ha matla
Ho feto-fetoha ha matla a khanya ke matla a khanya e le ntho ea ho feto-fetoha ha khanya, tšebeliso ea lintlha tsa kantle ho lekanya DC kapa phetoho e liehang ea lets'oao la khanya ho ba phetoho e potlakileng ea maqhubu a lets'oao la khanya, e le hore amplifier ea khetho ea maqhubu a AC e ka sebelisoa ho holisa, ebe bongata bo lokelang ho lekanyetsoa khafetsa.
1.2, phetoho ea mohato
Molao-motheo oa ho sebelisa lintlha tsa kantle ho fetola mokhahlelo oa maqhubu a leseli le ho lekanya bongata ba 'mele ka ho lemoha liphetoho tsa mokhahlelo o bitsoa optical phase modulation.
Mokhahlelo oa leqhubu la leseli o khethoa ke bolelele ba 'mele ba phatlalatso ea leseli, index ea refractive ea setsi sa phatlalatso le kabo ea sona, ke hore, phetoho ea mohato oa leqhubu la leseli e ka hlahisoa ka ho fetola liparamente tse ka holimo ho fihlela phetoho ea mohato.
Hobane sesebelisoa sa ho lemoha leseli ka kakaretso se sitoa ho bona phetoho ea mohato oa leqhubu la leseli, re tlameha ho sebelisa theknoloji ea ho kena-kenana ha leseli ho fetola phetoho ea mohato hore e be phetoho ea matla a leseli, e le ho fihlella ho lemoha bongata ba 'mele ba kantle, ka hona, phetoho ea mohato oa optical e lokela ho kenyelletsa likarolo tse peli: e 'ngoe ke mokhoa oa 'mele oa ho hlahisa phetoho ea mohato oa leqhubu la leseli; Ea bobeli ke ho kena-kenana ha leseli.
1.3. Phetoho ea polarization
Tsela e bonolo ka ho fetisisa ea ho finyella phetoho ea khanya ke ho potoloha li-polarizer tse peli tse amanang. Ho ea ka khopolo-taba ea Malus, matla a khanya a hlahisoang ke I=I0cos2α.
Moo: I0 e emela matla a khanya a fetisoang ke li-polarizer tse peli ha sefofane se seholo se tsitsitse; Alpha e emela Sekhutlo pakeng tsa lifofane tse peli tse kholo tsa li-polarizer.
1.4 Ho feto-fetoha ha maqhubu le bolelele ba wavelength
Molao-motheo oa ho sebelisa lintlha tsa kantle ho fetola maqhubu kapa bolelele ba leqhubu la khanya le ho lekanya bongata ba 'mele ba kantle ka ho lemoha liphetoho maqhubung kapa bolelele ba leqhubu la khanya o bitsoa phetoho ea maqhubu le bolelele ba leqhubu la khanya.
Nako ea poso: Phato-01-2023