Minda yekushandisa ma modulators e acousto-optic (AOM Modulator)

Minda yekushandisa ma modulators e acousto-optic (AOM Modulator)

Nheyo yeAcousto-optic modulator:

An modulator yeacousto-optic(AOM Modulator) inowanzo gadzirwa nemakristaro e-acousto-optic, ma-transducer, zvishandiso zvekutora uye madhiraivha. Chiratidzo chinobuda kubva kumutyairi chinoshanda pa-transducer muchimiro chechiratidzo chemagetsi uye chinozoshandurwa kuita mafungu e-ultrasonic anosiyana muchimiro chechiratidzo chemagetsi. Kana mafungu e-ultrasonic apfuura nepakati pe-acousto-optic medium, anokonzera kudzvanywa kwenzvimbo uye kureba kwenzvimbo, zvichigadzira kusvuta kwe-elastic. Kusvuta uku kunochinja nguva nenguva nenzvimbo, zvichiita kuti nzvimbo iratidze chiitiko che-alternating density, chakafanana ne-phase grating. Kana chiedza chikapfuura nepakati penzvimbo iyi chakakanganiswa nemafungu e-ultrasonic, chiitiko che-diffraction chinoitika. Chiitiko ichi chinonzi acousto-optic effect. Pasi pemhedzisiro yeruzha nechiedza, optical carrier inogadziriswa uye inova mafungu anogadziriswa "anotakura" ruzivo.

Mashandisirwo makuru e acousto-optic modulators:

Ruzha nechiedza Q Switch (AOQS)

Chinochinja Q-switching (AOQS) chinoshanda mukati me laser cavity uye chinogadziriswa zviri nyore.

Kukosha kweQ mugomba kunoshandiswa kugadzira ma-pulsed laser ane ma-pulse mapfupi uye simba repamusoro-soro. AOQS inowanzo shandiswa kugadzirisa kurasikirwa kwe-0-order beam. Kana radio frequency driver yeAOQS yakabatidzwa, mwenje we-0-order, nekuda kwe diffraction, unodzivirira laser iri mugomba kuti isazungunuke, zvichiwedzera kurasikirwa kwegomba uye kudzivirira kubuda kwelaser. Kana radio frequency driver yadzimwa kwenguva pfupi, simba re optical rakaunganidzwa mugomba relaser rinoburitswa muchimiro chepulses, nokudaro richigadzira pulsed laser. Maitiro aya anogona kudzokororwa nechiyero chinodarika 100KHz. Kana AOQS ichishanda muBragg state, pane diffraction beam imwe chete.

Kune mireza yakawanda ye diffraction pakushanda muRaman - Niss state.

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

Mamodulator eAcousto-optic (AOM) dzinowanzo shandiswa kunze kwelaser cavity kushandura simba re incident laser (amplitude modulation AM). Iyi inogona kuva ON/OFF modulation iri nyore yekukurumidza kuchinja kana variable level modulation kuti uwane intensity modulation. Modulation mode inosarudzwa nerudzi rweRF driver uye inogona kuva digital (on/off) kana analog (sine, square wave, linear, random…). Kazhinji, RF drive yeAOM inoshandisa fixed frequency. Iyo key parameter yeModulator yeAOMinguva yekukwira/kudonha, iyo inotsanangura "speed" inogoneka kana amplitude modulation bandwidth yekuchinjisa. Nguva yekukwira/kudonha inoenderana nedhayamita yedanda mukati memodulator. Nokudaro, kuti uwane nguva yekukwira nekukurumidza, dhayamita yemwaranzi yelaser inofanira kudzorwa. AOM inogona kushandiswa seshutter (kutenderera nekudzima pafrequency yakatarwa) uye zvakare se variable attenuator (inodzora simba rechiedza chinotumirwa). Laser modulation inowanikwa nekudzora radio frequency kuti ikonzere mafungu eruzha mu acousto-optic crystal.

3. Chinobvisa maacousto-optic (AODF)

Chinobvisa madhaimani (AODF) chinogona kuita kuti chiedza chemwenje chibude pachena nekuchinja madhaimani eredhiyo. Nzvimbo yekuskena inogona kunge iri yekusarongeka, kuskena kwemutsara unoenderera mberi uye kutsauka kwepoinzi. Zvichienderana nekristaro, urefu hwewavelength nehukuru hwemwaranzi, nguva yekupindura ye0.05 kusvika 15 microseconds uye kutonga kwakaringana kwenzvimbo yenRad kunogona kuwanikwa.

4. Acousto-optic frequency Shifter (AOFS)

Mushure mekupfuura nepakati pemidziyo yese yeacousto-optic, danda remagetsi rinoburitsa diffraction relaser beam rinoburitsa frequency shift. Acousto-optic frequency shifter (AOFS) mudziyo mudiki wakagadzirirwa kuzadzisa frequency shifting. Zvichienderana nemakona akasiyana ezviitiko akasarudzwa, AOFS ichachinja frequency kumusoro kana pasi nefrequency yesignali yeredhiyo inoshandiswa, uye michina miviri kana kupfuura inogona kupatsanurwa kuti iwane sum kana difference frequency combinations. Zvigadzirwa zveAOFS zvinoshandisa acoustic absorber angles dzakagadzirirwa, izvo zvinogona kuderedza sound reflection uye kuwedzera kushanda kweAOFS.

5. Firita Inogadziriswa yeAcousto-optic (AOTF)

Sefa inogadziriswa neacousto-optic (AOTF) ifirita ye optical passband ine hunyanzvi hwepamusoro, inogadziriswa nemagetsi uye inowanikwa zvisina kurongeka. Inogona kushandiswa kusarudza nekukurumidza uye nenzira inochinja mawavelength kubva kubroadband kana multi-line sources. Diffraction inoitika kana mamiriro chaiwo ekufananidza akasangana pakati pe acoustic beams. Nokudaro, zvinokwanisika kudzora ma parameter e filter nemagetsi (akadai se wavelength, modulation depth, uye kunyange bandwidth), nokudaro ichipa mukana wekukurumidza (kazhinji microseconds), dynamic, uye randomly ku optical filtering.