Izinkambu zohlelo lokusebenza lwe-acousto-optic modulators (AOM Modulator)

Izinkambu zohlelo lokusebenza lwe-acousto-optic modulators (AOM Modulator)

Isimiso se-Acousto-optic modulator:

An i-acousto-optic module(I-AOM Modulator) ngokuvamile yakhiwa amakristalu e-acousto-optic, ama-transducer, amadivaysi okumunca nezishayeli. Ukukhishwa kwesignali okushintshiwe okuvela kumshayeli kusebenza ku-transducer ngendlela yesignali kagesi bese iguqulwa ibe igagasi le-ultrasonic elihluka ngendlela yesignali kagesi. Lapho i-wave ye-ultrasonic idlula endaweni ye-acousto-optic, ibangela ukucindezelwa kwendawo kanye nokwelula kwendawo ephakathi, okukhiqiza ukunwebeka okunwebekayo. Lolu hlobo lushintsha ngezikhathi ezithile ngokuhamba kwesikhathi nendawo, okubangela ukuthi indawo emaphakathi ibonise isenzakalo sokuminyana esishintshanayo, esifana ne-grating yesigaba. Lapho ukukhanya kudlula kule medium kuphazanyiswe amagagasi e-ultrasonic, kwenzeka i-diffraction phenomenon. Lesi simo sibizwa ngokuthi umphumela we-acousto-optic. Ngaphansi komphumela womsindo nokukhanya, isithwali esibonakalayo siyashintshwa futhi sibe igagasi eliguquliwe “elithwala” ulwazi.

Izicelo eziyinhloko zama-acousto-optic modulators:

Ukushintsha komsindo nokukhanya kwe-Q (AOQS)

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

Inani elingu-Q ku-cavity lisetshenziselwa ukukhiqiza ama-laser ashayayo anama-pulses amafushane namandla aphezulu aphezulu. I-AOQS ivamise ukusetshenziselwa ukulungisa ukulahleka kwe-oda elingu-0. Lapho umshayeli wefrikhwensi yomsakazo we-AOQS evuliwe, ukukhanya kwe-oda elingu-0, ngenxa yokuphazamiseka, kuvimbela i-laser engaphakathi ukuthi inganyakazi, ikhulise ukulahleka kwe-cavity futhi ivimbe ukuphuma kwe-laser. Lapho umshayeli wefrikhwensi yomsakazo ecishwa isikhashana, amandla okukhanya anqwabelene endaweni ye-laser akhishwa ngendlela yama-pulses, ngaleyo ndlela akhiqize i-pulsed laser. Le nqubo ingaphinda ngesilinganiso esidlula u-100KHz. Uma i-AOQS isebenza ku-Bragg state, kuba khona kuphela i-diffraction beam eyodwa. phakathi

Kukhona imishayo eminingi yokuhlukanisa lapho usebenza esifundeni saseRaman - Niss.

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

Amamojula we-Acousto-optic (I-AOM) ngokuvamile asetshenziswa ngaphandle kwendawo ye-laser ukushintsha ukushuba kwe-laser yesigameko (i-amplitude modulation AM). Lokhu kungaba ukuguquguquka okulula kwe-ON/OFF ukuze ushintshe ngokushesha noma izinga eliguquguqukayo lifinyelele ukushintshashintsha kokuqina. Imodi yokushintshashintsha inqunywa uhlobo lomshayeli we-RF futhi ingaba yedijithali (ukuvula/ukucisha) noma i-analog (i-sine, igagasi lesikwele, eliqondile, elingahleliwe…). Ngokuvamile, idrayivu ye-RF ye-AOM ithatha imvamisa engaguquki. Ipharamitha eyinhloko yeI-AOM Modulatorisikhathi sokukhuphuka/sokuwa, esichaza “isivinini” esingafinyeleleka noma umkhawulokudonsa we-modulation we-amplitude wokuguquguquka. Isikhathi sokukhuphuka/sokuwa silingana nobubanzi be-beam ngaphakathi kwemoduli. Ngakho-ke, ukuze kutholwe isikhathi sokukhuphuka ngokushesha, ububanzi be-laser beam yesigameko kufanele bulawuleke. I-AOM ingasetshenziswa njengesivalo (ukuvula nokuvala ngebhayisikili imvamisa emisiwe) futhi njengesibambisi esiguquguqukayo (esilawula ngamandla ukukhanya okudlulisiwe). Ukushintshashintsha kwe-laser kufinyelelwa ngokulawula imvamisa yomsakazo ukuze kubangele amaza omsindo kukristalu ye-acousto-optic.

3. I-Acousto-optic deflector (AODF)

I-acoutooptic deflector (AODF) ingafinyelela ukuskena kwe-beam okujabulile ngokushintsha imvamisa yedrayivu yomsakazo. Indawo yokuskena ingaba indawo engahleliwe, ukuskena komugqa okuqhubekayo kanye nokuchezuka kwamaphuzu alandelanayo. Ngokusekelwe ku-crystal, ubude be-wavelength nosayizi we-beam, isikhathi sokuphendula se-0.05 kuya ku-15 microseconds kanye nokulawulwa kwesikhundla okunembile kwe-nRad kungafinyelelwa.

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

Ngemva kokudlula kuwo wonke amadivaysi e-acousto-optic, i-diffraction yomphumela we-laser beam izokhiqiza i-frequency shift. I-acousto-optic frequency shifter (AOFS) iyidivayisi ehlangene eklanyelwe ukuzuza ukuguqulwa kwamafrikhwensi. Kuye ngama-engeli esigameko akhethiwe, i-AOFS izohambisa imvamisa iye phezulu noma phansi ngefrikhwensi yesignali yefrikhwensi yomsakazo esetshenziswayo, futhi amadivaysi amabili noma ngaphezulu anganqunywa ukuze kuzuzwe isamba noma inhlanganisela yefrikhwensi yomehluko. Imikhiqizo ye-AOFS isebenzisa ama-engeli adizayinelwe ngokukhethekile ama-acoustic absorber, anganciphisa ukubonakaliswa komsindo futhi athuthukise ukusebenza kahle kwe-AOFS.

5. Isihlungi se-Acousto-optic Adjustable (AOTF)

Isihlungi se-acousto-optic tunable filter (AOTF) iyisimo esiqinile, esiqondiswe nge-elekthronikhi nesihlungi sebhendi yokungena efinyeleleka ngokungahleliwe. Ingasetshenziselwa ukukhetha ngokushesha nangokuguquguqukayo ubude obuthile obuvela ku-broadband noma emithonjeni yemigqa eminingi. Ukwahlukana kwenzeka lapho izimo ezifanayo ezifanayo zifinyelelwa phakathi kwemishayo ye-acoustic. Ngakho-ke, kuyenzeka ukuthi ulawule nge-elekthronikhi amapharamitha okuhlunga (njengobude beza, ubude bokuguquguquka, ngisho nomkhawulokudonsa), ngaleyo ndlela kuhlinzekwe ngokushesha (imvamisa ama-microseconds), ukufinyelela okuguquguqukayo, nokungahleliwe kokuhlunga okubonakalayo.