Acousto-optic modulator: Kopo ka likhabinete tse batang tsa athomo
Joalo ka karolo ea mantlha ea sehokelo sa laser-fiber ka har'a khabinete e batang ea athomo, theoptical fiber acousto-optic modulatore tla fana ka laser e matla e tsitsitseng khafetsa bakeng sa khabinete e batang ea athomo. Liathomo li tla monya lifoto tse nang le maqhubu a resonant a v1. Kaha matla a photon le liathomo a fapane, lebelo la liathomo le tla fokotseha ka mor'a ho monya photon, kahoo ho finyella sepheo sa ho pholisa liathomo. Liathomo tse pholileng ka laser, ka melemo ea tsona e kang nako e telele ea ho hlahloba, ho felisa phetoho ea makhetlo a Doppler le ho fetoha ha maqhubu ho bakoang ke ho thulana, le ho kopana ho fokolang ha lebala la leseli la ho lemoha, ho ntlafatsa haholo bokhoni ba ho lekanya bo nepahetseng ba ponahalo ea athomo, 'me e ka sebelisoa haholo lioacheng tse batang tsa athomo, li-interferometers tse batang tsa atomic, le ho tsamaisana le libaka tse ling tse batang.
Bokahare ba fiber optical AOM acousto-optic modulator haholo-holo e na le kristale ea acousto-optic le optical fiber collimator, joalo-joalo Letšoao le fetotsoeng le sebetsa ho transducer ea piezoelectric ka mokhoa oa pontšo ea motlakase (amplitude modulation, modulation ea phase kapa frequency modulation). Ka ho fetola litšoaneleho tsa ho kenya joalo ka makhetlo a mangata le amplitude ea lets'oao le fetotsoeng, frequency le amplitude modulation ea laser input lia finyelloa. Transducer ea piezoelectric e fetola matšoao a motlakase hore e be lipontšo tsa ultrasonic tse fapaneng ka mokhoa o ts'oanang ka lebaka la phello ea piezoelectric le ho li phatlalatsa ka har'a acousto-optic medium. Ka mor'a hore index ea refractive ea medium acousto-optic e fetohe nako le nako, ho thehoa grating ea refractive index. Ha laser e feta ka har'a fiber collimator 'me e kena ka har'a acousto-optic medium, diffraction e etsahala. Khafetsa ea khanya e fapaneng e phahamisa maqhubu a ultrasonic ho maqhubu a laser a input ea mantlha. Fetola boemo ba mochini o kopanyang optical fiber ho etsa hore optical fiber acoust-optic modulator e sebetse maemong a matle ka ho fetisisa. Ka nako ena, Angle ea ketsahalo ea lebone la lebone la ketsahalo e lokela ho khotsofatsa boemo ba Bragg diffraction, mme mokhoa oa diffraction e lokela ho ba Bragg diffraction. Ka nako ena, hoo e batlang e le matla ohle a leseli la ketsahalo a fetisetsoa ho leseli la pele la ho fapanyetsana.
Modulator ea pele ea AOM ea acouto-optic e sebelisoa pheletsong e ka pele ea amplifier ea sistimi, e hlophisa leseli le tsoelang pele le kenang ho tloha pheletsong e ka pele ka li-pulses tsa optical. Li-pulse tsa optical modulated li ntan'o kenya mochini oa optical amplification oa sistimi bakeng sa ho holisa matla. Ea bobeliAOM acouto-optic modulatore sebelisoa ka morao qetellong ea amplifier ea optical, 'me mosebetsi oa eona ke ho arola lerata la motheo la lets'oao la optical pulse le matlafalitsoeng ke tsamaiso. Likarolo tse ka pele le tse ka morao tsa li-pulses tsa leseli tse hlahisoang ke mochini oa pele oa AOM acouto-optic li abuoa ka mokhoa o ts'oanang. Ka mor'a hore u kene ka amplifier ea optical, ka lebaka la phaello ea amplifier bakeng sa moeli o ka sehloohong oa pulse ho feta oa pulse trailing edge, maqhubu a khanyang a khanyang a tla bontša ketsahalo e sothehileng ea waveform moo matla a tsepamisitsoeng moeling o ka pele, joalokaha ho bontšitsoe setšoantšong sa 3. Ho nolofalletsa tsamaiso ho fumana li-pulses tsa optical le li-pulses tsa pele tsa AOM tse ka pele le li-pulses tsa pele tsa AOM tse ka pele. acouto-optic modulator e hloka ho amohela modulation ea analog. Setsi sa taolo ea sistimi se fetola moeli o ntseng o phahama oa mochini oa pele oa AOM acouto-optic ho eketsa moeli o ntseng o phahama oa molumo oa optical oa module oa acoust-optic le ho lefella phaello e sa ts'oaneng ea amplifier ea optical ka pele le ka morao.
Sesebelisoa sa optical amplifier sa sistimi ha se holise feela matšoao a bohlokoa a optical pulse, empa hape se holisa lerata la motheo la tatellano ea pulse. Ho fihlella karo-karolelano e phahameng ea mats'oao ho lerata, karolo e phahameng ea ho timela ha fiber ea opticalAOM modulatore sebelisetsoa ho hatella lerata la motheo karolong e ka morao ea amplifier, ho etsa bonnete ba hore li-pulses tsa tsamaiso li ka feta ka katleho ho isa tekanyong e kholo ka ho fetisisa ha li ntse li thibela lerata la motheo ho kena ka nako-domain acousto-optic shutter (time-domain pulse gate). Mokhoa oa ho feto-fetoha ha dijithale oa amoheloa, 'me lets'oao la boemo ba TTL le sebelisoa ho laola ho kena le ho tima mojule oa acoust-optic ho netefatsa hore moeli o ntseng o phahama oa phallo ea nako ea mojule oa acoust-optic ke nako e ntseng e phahama ea sehlahisoa (ke hore, nako e nyane ea ho phahama eo sehlahisoa se ka e fumanang), mme bophara ba pulse bo ipapisitse le lets'oao la lebelo la sistimi ea TTL.
Nako ea poso: Jul-01-2025