Acousto-optic modulator: Kushanda mumakabati eatomu anotonhora
Sechinhu chakakosha cheiyo-fiber laser link mune inotonhora atomu kabati, iyooptical fiber acousto-optic modulatorichapa yakakwirira-simba frequency-yakagadzikana laser kune inotonhora atomu kabati. Maatomu anozotora mafotoni ane resonant frequency yev1. Sezvo kumhanya kwemafotoni nemaatomu kuri kupesana, kumhanya kwemaatomu kunodzikira mushure mekutora mafotoni, zvichibva zvazadzisa chinangwa chekutonhodza maatomu. Laser-yakatonhodzwa maatomu, ane mabhenefiti ayo akadai senguva refu yekuongorora, kubviswa kweDoppler frequency shift uye frequency shift kunokonzerwa nekudhumhana, uye kusimba kwekubatana kwenzvimbo yekuona chiedza, inovandudza zvakanyanya kuyera kugona kweatomic spectra uye inogona kushandiswa zvakanyanya mumawachi anotonhora atomu, inotonhora atomic interferometer, uye kutonhora kwenzvimbo yeatomu.
Iko mukati meiyo optical fiber AOM acousto-optic modulator inonyanya kuumbwa neacousto-optic crystal uye optical fiber collimator, etc. The modulated signal inoshanda pane piezoelectric transducer nenzira yemagetsi emagetsi (amplitude modulation, phase modulation kana frequency modulation). Nekuchinja maitiro ekuisa akadai se frequency uye amplitude yeiyo yekuisa modulated chiratidzo, iyo frequency uye amplitude modulation yeiyo yekuisa laser inowanikwa. Iyo piezoelectric transducer inoshandura masaini emagetsi kuita ma ultrasonic masaini anosiyana patani imwechete nekuda kweiyo piezoelectric mhedzisiro uye anoaparadzira mune acousto-optic medium. Mushure mokunge refractive index ye acousto-optic medium inoshanduka nguva nenguva, refractive index grating inoumbwa. Kana iyo laser ichipfuura nepakati pefiber collimator uye ichipinda muacousto-optic medium, diffraction inoitika. Kuwanda kwechiedza chakasiyaniswa chinokwirisa ultrasonic frequency pane yekutanga yekuisa laser frequency. Gadzirisa chinzvimbo cheiyo optical fiber collimator kuita kuti iyo optical fiber acoust-optic modulator ishande mune yakanakisa mamiriro. Panguva ino, chiitiko cheAngle chechiitiko mwenje mwenje unofanirwa kugutsa iyo Bragg diffraction mamiriro, uye iyo diffraction mode inofanirwa kunge iri Bragg diffraction. Panguva ino, rinenge simba rose rechiedza chechiitiko chinotamirwa kune yekutanga-order diffraction light.
Yekutanga AOM acouto-optic modulator inoshandiswa kumberi kumagumo kweiyo system's optical amplifier, inogadzirisa inoenderera inopinza mwenje kubva kumberi kumagumo nemapurusi emaziso. Iwo modulated optical pulses anobva apinda iyo system's optical amplification module yekusimudza simba. YechipiriAOM acouto-optic modulatorinoshandiswa kumucheto kumashure kweiyo optical amplifier, uye basa rayo nderekuparadzanisa ruzha rwekutanga kweiyo optical pulse signal inowedzerwa nehurongwa. Kumberi nekumashure kumapendero emwenje pulses inobuda neiyo yekutanga AOM acouto-optic modulator yakagovaniswa zvakaenzana. Mushure mekupinda muoptical amplifier, nekuda kwekuwana kweamplifier ye pulse inotungamira kumucheto kwakakwirira kudarika iyo ye pulse trailing edge, iyo yakasimbiswa chiedza pulses icharatidza waveform distortion phenomenon apo simba rinoiswa pamucheto unotungamira, sezvinoratidzwa muMufananidzo 3. Kuita kuti hurongwa huwane optical front pulses uye AOMs ekutanga kugovera kumashure kweAOM pulses nemashure ekutanga. acouto-optic modulator inoda kutora analog modulation. Iyo system control unit inogadzirisa inokwira kumucheto kwekutanga AOM acouto-optic modulator kuti iwedzere kukwira kumucheto kweiyo optical pulse yeacoust-optic module uye kutsiva kuwana kusiri-kufanana kweiyo optical amplifier kumberi uye kumashure kumicheto yepulse.
Iyo optical amplifier yeiyo system haingokwidzi anobatsira optical pulse masiginecha, asi zvakare inokudza base ruzha rwekutevedzana kwepulse. Kuti uwane yakakwira sisitimu chiratidzo-kune-ruzha reshiyo, iyo yakakwira yekudzima chiyero cheiyo optical fiberAOM modulatorinoshandiswa kudzvanyirira ruzha rwechigadziko kumucheto kumashure kweamplifier, kuve nechokwadi chekuti system sign pulses inogona kupfuura nepamusoro kusvika pamwero mukuru ichidzivirira ruzha rwepasi kupinda mukati menguva-domain acousto-optic shutter (nguva-domain pulse gedhi). Iyo digital modulation nzira inotambirwa, uye TTL level siginecha inoshandiswa kudzora kubuda nekudzika kweiyo acoust-optic module kuona kuti iyo inosimuka yenguva-domain pulse yeacoust-optic module ndiyo yakagadzirirwa kusimuka nguva yechigadzirwa (kureva, iyo shoma yekusimuka nguva iyo chigadzirwa chinogona kuwana), uye pulse hupamhi hunoenderana neiyo system TTL level yehupamhi.
Nguva yekutumira: Jul-01-2025