Molao-motheo oa ho sebetsa oalaser ea semiconductor
Pele ho tsohle, litlhoko tsa paramente bakeng sa li-lasers tsa semiconductor lia hlahisoa, haholo-holo ho kenyelletsa lintlha tse latelang:
1. Ts'ebetso ea Photoelectric: ho kenyelletsa le karolelano ea ho fela, dynamic linewidth le mekhahlelo e meng, mekhahlelo ena e ama ka ho toba ts'ebetsong ea lasers ea semiconductor mekhoeng ea puisano.
2. Mekhahlelo ea sebopeho: joalo ka boholo bo khanyang le tlhophiso, tlhaloso ea ho qetela ea ho ntša, boholo ba ho kenya le boholo ba kemiso.
3. Wavelength: Leqhubu la maqhubu a laser semiconductor ke 650 ~ 1650nm, 'me ho nepahala ho phahame.
4. Threshold current (Ith) le ho sebetsa hona joale (lop) : Mekhahlelo ena e khetholla maemo a ho qala le boemo ba ho sebetsa ba laser ea semiconductor.
5. Matla le motlakase: Ka ho lekanya matla, motlakase le motlakase oa laser ea semiconductor mosebetsing, li-curve tsa PV, PI le IV li ka huloa ho utloisisa litšobotsi tsa bona tsa ho sebetsa.
Molao-motheo oa ho sebetsa
1. Maemo a ho fumana: Kabo ea inversion ea bajari ba litefiso sebakeng sa lasing (sebaka se sebetsang) se thehiloe. Ho semiconductor, matla a lielektrone a emeloa ke letoto la matla a batlang a tsoela pele. Ka hona, palo ea li-electrone botlaaseng ba sehlopha sa conduction sebakeng se phahameng sa matla se tlameha ho ba seholo haholo ho feta palo ea masoba a holimo ho sehlopha sa valence sebakeng se tlaase sa matla pakeng tsa libaka tse peli tsa matla a matla ho finyella phetoho ea nomoro ea karoloana. Sena se finyelloa ka ho sebelisa leeme le nepahetseng ho homojunction kapa heterojunction le ho enta bajari ba hlokahalang ka har'a lera le sebetsang ho hlasimolla lielektrone ho tloha sehlopheng se tlaase sa valence ea matla ho ea sehlopheng se phahameng sa ho tsamaisa matla. Ha palo e kholo ea li-electrone sebakeng se fetotsoeng sa palo ea baahi e kopana hape le masoba, ho hlaha tlhahiso e susumetsang.
2. E le hore u fumane mahlaseli a mahlahahlaha a tsitsitseng, mahlaseli a tsositsoeng a tlameha ho khutlisetsoa ka makhetlo a 'maloa ho resonator ea optical ho etsa laser oscillation, resonator ea laser e thehoa ka holim'a tlhaho ea tlhaho ea kristale ea semiconductor e le seipone, hangata. e pentiloe qetellong ea khanya e nang le filimi e phahameng ea multilayer dielectric e bonahatsang, 'me bokaholimo bo boreleli bo pentiloe ka filimi e fokolitsoeng ea ho bonahatsa. Bakeng sa sebaka sa Fp cavity (Fabry-Perot cavity) semiconductor laser, FP cavity e ka hahoa habonolo ka ho sebelisa sefofane sa tlhaho sa tlhaho se pota-potileng sefofane sa pn junction sa kristale.
(3) E le hore ho thehoe oscillation e tsitsitseng, laser medium e tlameha ho fana ka phaello e lekaneng ho lefella tahlehelo ea optical e bakoang ke resonator le tahlehelo e bakoang ke tlhahiso ea laser ho tloha holim'a cavity, 'me e lula e eketsa lebala le bobebe lesobeng. Sena se tlameha ho ba le ente e matla e lekaneng ea hona joale, ke hore, ho na le phetoho e lekaneng ea palo ea likaroloana, tekanyo e phahameng ea ho fetoha ha palo ea likaroloana, phaello e kholoanyane, ke hore, tlhokahalo e tlameha ho finyella boemo bo itseng ba hona joale. Ha laser e fihla monyako, leseli le nang le leqhubu le itseng le ka ts'oaroa ka har'a sekoti le ho holisoa, 'me qetellong le thehe laser le tlhahiso e tsoelang pele.
Tlhokahalo ea ts'ebetso
1. Modulation bandwidth le sekhahla: lasers semiconductor le thekenoloji ea bona ea modulation li bohlokoa puisanong ea optical e se nang mohala, 'me bandwidth ea modulation le sekhahla li ama boleng ba puisano ka kotloloho. Laser e fetotsoeng ka hare (ka ho toba modulated laser) e loketse masimo a fapaneng a puisano ea fiber ea optical ka lebaka la phetisetso ea eona e phahameng ea lebelo le theko e tlase.
2. Litšobotsi tsa Spectral le litšobotsi tsa modulation: Semiconductor e aba li-lasers tsa maikutlo (DFB laser) e se e le mohloli oa bohlokoa oa leseli puisanong ea optical fiber le puisano ea optical space ka lebaka la litšobotsi tsa bona tse ntle haholo tsa spectral le litšobotsi tsa modulation.
3. Litšenyehelo le tlhahiso ea boima: Li-lasers tsa semiconductor li hloka ho ba le melemo ea theko e tlaase le tlhahiso ea bongata ho finyella litlhoko tsa tlhahiso e kholo le likopo.
4. Tšebeliso ea matla le ho tšepahala: Liketsahalong tsa kopo tse kang litsi tsa data, lasers ea semiconductor e hloka matla a fokolang a matla le ho tšepahala ho phahameng ho netefatsa hore nako e telele e sebetsa ka mokhoa o tsitsitseng.
Nako ea poso: Sep-19-2024