Kutanga, Yemukati modulation uye ekunze modulation
Zvinoenderana nehukama hwehukama pakati peiyo modulator uye laser, iyolaser modulationinogona kukamurwa kuva mukati modulation uye kunze modulation.
01 mukati modulation
Iyo modulation siginecha inoitwa mukuita kwelaser oscillation, kureva kuti, paramita yelaser oscillation inoshandurwa zvinoenderana nemutemo weiyo modulation chiratidzo, kuitira kuti ichinje hunhu hwekubuda kwelaser uye kuwana modulation.
(1) Yakananga kudzora laser pombi sosi kuti uwane modulation yeinobuda laser kusimba uye kana iripo, kuitira kuti idzorwe nemagetsi.
(2) Iyo modulation element inoiswa mune resonator, uye shanduko yehunhu hwechimiro cheiyo modulation element inodzorwa nechiratidzo chekushandura maparamendi eiyo resonator, nekudaro ichichinja maitiro ekubuda kwelaser.
02 External modulation
Yekunze modulation ndiko kupatsanurwa kwelaser chizvarwa uye modulation.Inoreva kurodha kweiyo modulated chiratidzo mushure mekugadzirwa kwelaser, ndiko kuti, modulator inoiswa munzira yekuona kunze kwelaser resonator.
Iyo modulation signal voltage inowedzerwa kune modulator kuita humwe hunhu hweiyo modulator chikamu shanduko, uye kana laser ichipfuura nepakati payo, mamwe maparamita emwenje wave anogadziriswa, nekudaro anotakura ruzivo kuti rwufambiswe.Naizvozvo, ekunze modulation haisi yekushandura laser paramita, asi kushandura maparameter eiyo inobuda laser, senge kusimba, frequency, zvichingodaro.
Chepiri,laser modulatorclassification
Zvinoenderana nemaitiro ekushanda e modulator, inogona kuiswa mukatielectro-optic modulation, acoustooptic modulation, magneto-optic modulation uye yakananga modulation.
01 Yakananga modulation
Kutyaira ikozvino kwesemiconductor laserkana chiedza-emitting diode inogadziriswa zvakananga nechiratidzo chemagetsi, kuitira kuti chiedza chinobuda chigadziriswe nekuchinja kwechiratidzo chemagetsi.
(1) TTL modulation mune yakananga modulation
Iyo TTL dhijitari siginecha inowedzerwa kune laser magetsi magetsi, kuitira kuti laser drive ikozvino inogona kudzorwa kuburikidza nekunze chiratidzo, uye ipapo iyo laser inobuda frequency inogona kudzorwa.
(2) Analog modulation mune yakananga modulation
Pamusoro peiyo laser simba rekupa analog siginecha (amplitude isingasviki 5V yekupokana shanduko yechiratidzo wave), inogona kuita yekunze chiratidzo chekuisa akasiyana voltage inoenderana nelaser dhiraivha yazvino, uye wozodzora inobuda laser simba.
02 Electro-optic modulation
Modulation uchishandisa electro-optic effect inonzi electro-optic modulation.Hwaro hwemuviri hwe electro-optic modulation ndeye electro-optic mhedzisiro, ndiko kuti, pasi pekuita kwenzvimbo yemagetsi yakaiswa, iyo refractive index yemamwe makristasi ichachinja, uye kana mwenje wave uchipfuura nepakati peiyi svikiro, hunhu hwayo hwekutapurirana huchachinja. kukanganiswa uye kuchinjwa.
03 Acousto-optic modulation
Hwaro hwemuviri hweacousto-optic modulation ndeye acousto-optic mhedzisiro, iyo inoreva chiitiko chekuti masaisai emwenje anoparadzirwa kana kuparadzirwa neiyo mashura mafungu ndima kana achipararira pakati.Kana iyo refractive index yepakati inoshanduka nguva nenguva kuti iite refractive index grating, diffraction ichaitika apo chiedza chechiedza chinopararira mukati mepakati, uye kusimba, kuwanda uye kutungamirirwa kwechiedza chakasiyana chichashanduka nekushandurwa kwendima yakakura yemafungu.
Acousto-optic modulation chiitiko chemuviri chinoshandisa acousto-optic mhedzisiro kurodha ruzivo pane yekuona frequency inotakura.Iyo modulated chiratidzo inoitwa pane electro-acoustic transducer muchimiro chemagetsi chiratidzo (amplitude modulation), uye inoenderana nemagetsi chiratidzo inoshandurwa kuita ultrasonic munda.Kana mafungu emwenje achipfuura nepakati peacousto-optic medium, iyo inotakura yemaziso inogadziriswa uye inova intensity modulated wave iyo "inotakura" ruzivo.
04 Magneto-optical modulation
Magneto-optic modulation iko kushandiswa kweFaraday's electromagnetic optical rotation effect.Kana masaisai echiedza achipararira nepakati pemagineti-optical medium parallel kune kutungamira kwemagnetic field, chiitiko chekutenderera kwepolarization plane ye linearly polarized light inonzi magnetic rotation.
Iyo inogara iine magineti inoiswa kune yepakati kuti iwane magineti saturation.Kutungamira kwedunhu remagineti kuri munzira yeaxial yepakati, uye kutenderera kweFaraday kunoenderana neaxial yazvino magineti.Naizvozvo, nekudzora ikozvino ye-high-frequency coil uye kushandura iyo magineti simba reiyo axial chiratidzo, iyo inotenderera Angle ye optical vibration ndege inogona kudzorwa, kuitira kuti mwenje amplitude kuburikidza nepolarizer ichinje nekuchinja kwe θ Angle. , kuitira kuti uwane modulation.
Nguva yekutumira: Jan-08-2024