Modulator ea Acousto-optic: Tšebeliso likhaboteng tsa athomo tse batang

Sesebelisoa sa ho laola molumo oa acousto-optic: Tšebeliso likhaboteng tsa athomo tse batang

Jwalo ka karolo ya mantlha ya kgokelo ya laser ya fiber yohle ka hara khabinete ya athomo e batang,modulator ea acousto-optic ea fiber ea opticale tla fana ka laser e tsitsitseng maqhubu a matla a phahameng bakeng sa khabinete ea athomo e batang. Liathomo li tla monya li-photon ka maqhubu a resonant a v1. Kaha lebelo la li-photon le liathomo le fapane, lebelo la liathomo le tla fokotseha ka mor'a ho monya li-photon, ka hona ho fihlella morero oa ho pholisa liathomo. Liathomo tse pholileng ka laser, ka melemo ea tsona e kang nako e telele ea ho hlahloba, ho felisoa ha phetoho ea maqhubu a Doppler le phetoho ea maqhubu e bakoang ke ho thulana, le ho kopana ho fokolang ha lebala la leseli la ho lemoha, ho ntlafatsa haholo bokhoni bo nepahetseng ba ho lekanya ba li-spectra tsa athomo 'me li ka sebelisoa haholo lioacheng tse batang tsa athomo, li-interferometer tsa athomo tse batang, le ho tsamaea ha athomo e batang, har'a masimo a mang.

Karolo e ka hare ea modulator ea fiber ea optical AOM acousto-optic haholo-holo e na le kristale ea acousto-optic le collimator ea fiber ea optical, jj. Letšoao le fetotsoeng le sebetsa ho transducer ea piezoelectric ka mokhoa oa lets'oao la motlakase (ho feto-fetoha ha amplitude, ho feto-fetoha ha phase kapa ho feto-fetoha ha maqhubu). Ka ho fetola litšobotsi tsa ho kenya tse kang maqhubu le boholo ba lets'oao le fetotsoeng la ho kenya, ho fetoloa ha maqhubu le boholo ba laser ea ho kenya hoa finyelloa. Transducer ea piezoelectric e fetola matšoao a motlakase hore e be matšoao a ultrasonic a fapaneng ka mokhoa o ts'oanang ka lebaka la phello ea piezoelectric mme e a jala ka har'a acousto-optic medium. Kamora hore index ea refractive ea acousto-optic medium e fetohe nako le nako, grating ea index ea refractive ea thehoa. Ha laser e feta ka har'a fiber collimator 'me e kena ka har'a acousto-optic medium, ho hlaha diffraction. Maqhubu a leseli le fafalitsoeng a beha maqhubu a ultrasonic holim'a maqhubu a pele a laser ea ho kenya. Fetola boemo ba optical fiber collimator ho etsa hore optical fiber acoust-optic modulator e sebetse boemong bo botle ka ho fetisisa. Nakong ena, Angle ea lebone la ketsahalo e lokela ho khotsofatsa boemo ba Bragg diffraction, 'me mokhoa oa diffraction e lokela ho ba Bragg diffraction. Nakong ena, hoo e ka bang matla 'ohle a leseli la ketsahalo a fetisetsoa khanyeng ea diffraction ea odara ea pele.

Modulator ea pele ea AOM acouto-optic e sebelisoa pheletsong e ka pele ea amplifier ea optical ea sistimi, e fetola leseli le kenang le tsoelang pele ho tloha pheletsong e ka pele ka li-pulse tsa optical. Li-pulse tsa optical tse fetotsoeng ebe li kena moduleng ea amplification ea optical ea sistimi bakeng sa amplification ea matla. Ea bobeliSesebelisoa sa ho laola motlakase sa AOM acouto-optice sebediswa karolong e ka morao ya amplifier ya optical, mme mosebetsi wa yona ke ho arola lerata la motheo la letshwao la pulse ya optical le matlafatswang ke sistimi. Meeli e ka pele le e ka morao ya di-pulse tsa lesedi tse tswang ke modulator ya pele ya AOM acouto-optic e ajwa ka ho lekana. Kamora ho kena ho amplifier ya optical, ka lebaka la keketseho ya amplifier bakeng sa moedi o etellang pele wa pulse e phahame ho feta ya moedi o latelang wa pulse, di-pulse tsa lesedi tse matlafatswang di tla bontsha ketsahalo ya ho sotha sebopeho sa maqhubu moo matla a kopaneng moeding o etellang pele, jwalo ka ha ho bontshitswe ho Setshwantsho sa 3. Ho nolofalletsa sistimi ho fumana di-pulse tsa optical tse nang le kabo e lekanang meeling e ka pele le e ka morao, modulator ya pele ya AOM acouto-optic e hloka ho amohela modulation ya analog. Yuniti ya taolo ya sistimi e lokisa moedi o nyolohang wa modulator ya pele ya AOM acouto-optic ho eketsa moedi o nyolohang wa pulse ya optical ya module ya acoust-optic le ho buseletsa ho se tshwane ha gain ya amplifier ya optical meeling e ka pele le e ka morao ya pulse.

Seholisa-mahlaseli sa optical sa sistimi ha se eketsa feela matshwao a molemo a pulse ya optical, empa hape se eketsa lerata la motheo la tatellano ya pulse. Ho fihlella karolelano e phahameng ya letshwao-ho-lerata ya sistimi, karolo e phahameng ya karolelano ya ho fela ha faeba ya optical.Modulator ea AOMe sebediswa ho thibela lerata la motheo karolong e ka morao ya amplifier, ho netefatsa hore di-pulse tsa letshwao la sistimi di ka feta ka katleho ho isa boholeng bo boholo ha di ntse di thibela lerata la motheo ho kena ho shutter ya acousto-optic ya nako-domain (heke ya pulse ya nako-domain). Mokgwa wa dijithale wa ho fetola modumo o a sebediswa, mme letshwao la boemo ba TTL le sebediswa ho laola ho bulwa le ho tima ha mojule wa acoust-optic ho netefatsa hore lehlakore le nyolohang la pulse ya nako-domain ya mojule wa acoust-optic ke nako e reretsweng ya ho phahama ha sehlahiswa (ke hore, nako e nyane ya ho phahama eo sehlahiswa se ka e fumanang), mme bophara ba pulse bo itshetlehile ka bophara ba pulse ya letshwao la boemo ba TTL ya sistimi.