Imihlaba yesicelo yeemodyuli ze-acousto-optic (i-AOM Modulator)

Imihlaba yesicelo yeemodyuli ze-acousto-optic (i-AOM Modulator)

Umgaqo wemodyuli yeAcousto-optic:

An imodyuli yeacousto-optic(I-AOM Modulator) ngokuqhelekileyo yenziwe ngeekristale ze-acousto-optic, ii-transducers, izixhobo zokufunxa kunye nabaqhubi. Imveliso yesignali elungisiweyo evela kumqhubi isebenza kwi-transducer ngendlela yesignali yombane kwaye emva koko iguqulwe ibe yi-ultrasonic wave eyahluka ngendlela yesignali yombane. Xa i-wave ye-ultrasonic idlula kwi-acousto-optic medium, ibangela ukunyanzeliswa kwendawo kunye nokunyusa okuphakathi, ukuvelisa i-elastic strain. Olu xinzelelo lutshintsha ngamaxesha kunye nexesha kunye nendawo, lubangela ukuba indawo ephakathi ibonise isenzeko soxinaniso olutshintshanayo, olufana nenqanaba lokugawula. Xa ukukhanya kudlula kule medium ephazanyiswa ngamaza e-ultrasonic, kwenzeka into ephazamisayo. Le nto ibizwa ngokuba yi-acousto-optic effect. Ngaphantsi kwempembelelo yesandi kunye nokukhanya, i-optical carrier imodulated kwaye iba yi-modulated wave "ephethe" ulwazi.

Usetyenziso oluphambili lweemodyuli zeacousto-optic:

Isandi kunye nokukhanya Q switch (AOQS)

I-acoutooptic Q-switching switch (AOQS) isebenza ngaphakathi kwe-laser cavity kwaye ilungiswa ngokusebenzayo.

Ixabiso le-Q kwi-cavity lisetyenziselwa ukuvelisa i-laser ye-pulsed nge-pulses emfutshane kunye namandla aphezulu aphezulu. I-AOQS idla ngokusetyenziselwa ukumodareyitha ukulahleka kwe-0-order beam. Xa i-radio frequency driver ye-AOQS ivuliwe, ukukhanya kwe-0-odolo, ngenxa ye-diffraction, kuthintela i-laser kwi-cavity ukuba i-oscillating, inyusa ilahleko yomgodi kunye nokuthintela ukuphuma kwe-laser. Xa umqhubi wefrikhwensi kanomathotholo ecinyiwe ngokufutshane, amandla okukhanya aqokelelweyo kwi-laser cavity akhutshwa ngendlela yeepulses, ngaloo ndlela evelisa i-pulsed laser. Le nkqubo inokuphinda iphindwe kwizinga elidlula i-100KHz. Xa i-AOQS isebenza kwi-Bragg state, kukho i-diffraction beam enye kuphela. kwi

Kukho imiqadi emininzi yokwahlukana xa usebenza kwiRaman-Niss state.

2. I-Acousto-optic Modulator/Switch (AOM Modulator)

Iimodyuli zeAcousto-optic (AOM) ngokuqhelekileyo zisetyenziselwa ngaphandle kwe-laser cavity ukutshintsha ubunzulu be-laser yesiganeko (i-amplitude modulation AM). Oku kunokuba yi-ON/OFF imodyuli elula yokutshintsha ngokukhawuleza okanye ukumodareyitha kwenqanaba eliguquguqukayo ukufezekisa ukumodareyitha kokuqina. Imo yokumodareyitha imiselwa luhlobo lomqhubi weRF kwaye inokuba yedijithali (ivuliwe/icinywe) okanye i-analog (isine, i-square wave, linear, random…). Ngokubanzi, i-RF drive ye-AOM ithatha i-frequency esisigxina. Iparameter engundoqo yeImodyuli ye-AOMlixesha lokunyuka / lokuwa, elichaza "isantya" esifikelelekayo okanye i-amplitude modulation bandwidth of modulation. Ixesha lokunyuka / lokuwa lilingana nobubanzi be-beam ngaphakathi kwemodyuli. Ngoko ke, ukuze ufumane ixesha lokunyuka ngokukhawuleza, ububanzi be-laser beam yesiganeko kufuneka ilawulwe. I-AOM ingasetyenziswa njenge-shutter (ukuhamba ngebhayisikile kunye nokucima kwi-frequency emiselweyo) kunye ne-attenuator eguquguqukayo (ukulawula ngokuguquguqukayo ukuqina kokukhanya okugqithisiweyo). Ukumodareyitha kweLaser kuphunyezwa ngokulawula amaza kanomathotholo ukuze kubangele amaza esandi kwikristale yeacousto-optic.

3. I-Acousto-optic deflector (AODF)

I-acoutooptic deflector (AODF) inokufikelela kwi-scan echulumancisayo ye-beam ngokutshintsha i-frequency drive frequency. Indawo yokuskena inokuba yimeko engacwangciswanga, ukuskena kwelayini okuqhubekayo kunye nophambuko lwenqaku elilandelelanayo. Ngokusekelwe kwi-crystal, ubude be-wavelength kunye nobukhulu be-beam, ixesha lokuphendula le-0.05 kwi-microseconds ye-15 kunye nolawulo oluchanekileyo lwendawo ye-nRad inokufezekiswa.

4. I-Acousto-optic frequency Shifter (AOFS)

Emva kokudlula kuzo zonke izixhobo ze-acousto-optic, i-diffraction ye-beam ye-laser iya kuvelisa i-frequency shift. I-acousto-optic frequency shifter (AOFS) sisixhobo esihlangeneyo esilungiselelwe ngokukodwa ukuphumeza ukutshintshwa kwamaza. Ngokuxhomekeke kwii-engile zezehlo ezikhethiweyo ezahlukeneyo, i-AOFS iya kutshintsha i-frequency phezulu okanye ezantsi ngokuphindaphindiweyo kwesignali yefrikhwensi yerediyo esetyenzisiweyo, kunye nezixhobo ezibini okanye ezingaphezulu zinokunqunyulwa ukufumana isimbuku okanye umahluko wokudityaniswa kwamafrikhwensi. Iimveliso ze-AOFS zamkela ii-engile eziyilwe ngokukodwa ze-acoustic absorber, ezinokunciphisa ukubonakaliswa kwesandi kunye nokuphucula ukusebenza kakuhle kwe-AOFS.

5. I-Acousto-optic Adjustable Filter (AOTF)

Icebo lokucoca ulwelo lwe-acousto-optic (AOTF) sisimo esiqinileyo, esijongiwe ngombane kwaye sifikeleleke ngokungenamkhethe. Ingasetyenziselwa ngokukhawuleza nangokuguquguqukayo ukukhetha ubude obuthile obuvela kwibroadband okanye kwimithombo yemigca emininzi. Ukwahluka kwenzeka xa iimeko ezithile ezihambelanayo zihlangatyezwana phakathi kwemiqadi yeacoustic. Ke ngoko, kuyenzeka ukuba kulawulwe nge-elektroniki iiparamitha zokucoca (ezifana nobude bewavelength, ubunzulu bomodulation, kunye ne-bandwidth), ngokubonelela ngokukhawuleza (ngokuqhelekileyo i-microseconds), okuguquguqukayo, kunye nokufikelela okungahleliweyo kuhluzo lwamehlo.