Sekema sa Classification le modulation ea laser modulator

Sekema sa Classification le modulation ea laser modulator

Modulator ea laserke mofuta oa lisebelisoa tsa laser tsa taolo, ha se tsa mantlha joalo ka likristale, lilense le likarolo tse ling, ebile ha li kopane haholo joalo ka lilasers,lisebelisoa tsa laser, ke tekanyo e phahameng ea ho kopanya, mefuta le mesebetsi ea lihlahisoa tsa sehlopha sa lisebelisoa. Ho tloha polelong e rarahaneng ea leqhubu la leseli, ho ka bonoa hore lintlha tse amang leqhubu la leseli ke matla A (r), mohato Φ (r), maqhubu a ω le likarolo tse 'nè tsa tataiso ea phatlalatso, ka ho laola lintlha tsena ho ka fetola boemo ba leqhubu la leseli, modulator ea laser e lumellanang ke eonamatla modulator, modulatara wa mophato, phetiso ya maqhubu le sesupo.

1. Intensity modulator: e sebelisetsoang ho fetola matla kapa amplitude ea laser, eo li-attenuators tsa optical, liheke tsa optical li emelang ka ho fetisisa, hammoho le lisebelisoa tse kopantsoeng le lisebelisoa tse kang ho arola nako, li-stabilizers tsa matla, li-attenuators tsa lerata.

2. Modulator ea mohato: e sebelisetsoang ho laola mohato oa sefate, keketseho ea mohato e bitsoa lag, ho fokotseha ha mohato ho bitsoa lead. Ho na le mefuta e mengata ea li-modulator tsa mokhahlelo, 'me melao-motheo ea bona ea ho sebetsa e fapane haholo, joalo ka li-modulator tsa photoelastic, li-modulator tsa lebelo le phahameng tsa motlakase oa motlakase oa LN, lipampiri tsa ho lieha ho feto-fetoha ha mokelikeli oa kristale, joalo-joalo, kaofela ke li-modulator tsa mekhahlelo tse ipapisitseng le melao-motheo e fapaneng ea ts'ebetso.

3. Frequency shifter: e sebelisetsoang ho fetola maqhubu a maqhubu a khanyang, e sebelisoa haholo lits'ebetsong tsa laser tse phahameng kapa lisebelisoa tsa 'mapa, ka acousto-optical frequency shifter e le moemeli ea tloaelehileng.

4. Deflector: e sebelisetsoang ho fetola tataiso ea ho phatlalatsoa ha maballo, mokhoa o tloaelehileng oa galvanometer ke o mong oa bona, ho phaella ho mems e potlakileng ea galvanometer, electro-optical deflector le acousto-optical deflector.

Re na le mohopolo o akaretsang oa modulator ea laser, ke hore, likarolo tse ka laolang le ho fetola lisebelisoa tse ling tsa 'mele tsa laser, empa re batla ho hlahisa lihlahisoa tse ikhethileng tsa laser modulator, ke sengoloa feela se hole haholo. Kahoo, pele ho tsohle, tsepamisa maikutlo ho modulator ea matla. Intensity modulator e le mofuta oa modulator e sebelisoang haholo mefuteng eohle ea lisebelisoa tsa optical, mefuta e fapaneng ea eona, ts'ebetso e fapaneng e ka hlalosoa e le e rarahaneng, kajeno ho u tsebisa morero o mene o tloaelehileng oa matla a motlakase: morero oa mochine, mochine oa electro-optic, morero oa acousto-optic le morero oa kristale ea metsi.

1. Sekema sa mochini: modulator ea matla ea mochini ke eona ea pele le e sebelisoang ka ho fetesisa ea matla. Molao-motheo ke ho fetola karo-karolelano ea s light le p light leseling la polarized ka ho potoloha poleiti ea halofo ea wave, le ho arola leseli ka polarizer. Ho tloha tokisong ea pele ea tataiso ho fihlela mehleng ea kajeno e itirisang haholo le e nepahetseng haholo, mefuta ea lihlahisoa tsa eona le nts'etsopele ea ts'ebeliso e se e holile haholo.

2. Electro-optical scheme: electro-optical intensity modulator e ka fetola matla kapa amplitude ea leseli la polarized, molao-motheo o itšetlehile ka phello ea Pockels ea likristale tsa electro-optical. Boemo ba polarization bo fetoha ka mor'a hore ho sebelisoe kristale ea electro-optic e nang le tšimo ea motlakase, ebe polarization e aroloa ka ho khetheha ke polarizer. Matla a leseli le hlahisitsoeng a ka laoloa ka ho fetola matla a sebaka sa motlakase, 'me moeli oa ho phahama / ho oa ha ns boholo o ka finyelloa.

3. Sekema sa acousto-optic: modulator ea acousto-optic e ka boela ea sebelisoa e le modulator ea matla. Ka ho fetola katleho ea diffraction, matla a khanya ea 0 le leseli la 1 a ka laoloa ho finyella morero oa ho fetola matla a leseli. Acoustooptic heke (optical attenuator) e na le litšobotsi tsa lebelo la ho feto-fetoha ha maemo le lebelo le phahameng la tšenyo.

4 Tharollo ea kristale ea metsi: sesebelisoa sa kristale sa metsi se atisa ho sebelisoa e le poleiti e feto-fetohang kapa filthara e khonang ho sebelisoa, ka ho sebelisa motlakase oa motlakase lipheletsong tse peli tsa lebokose la kristale ea metsi ho eketsa ntho e nepahetseng ea polarization, e ka etsoa ka sekoahelo sa kristale sa metsi kapa attenuator e fapaneng, sehlahisoa se na le sebaka se seholo ka leseli, litšobotsi tse phahameng tse ka tšeptjoang.