Modulator yemaziso, inoshandiswa kudzora kusimba kwechiedza, kupatsanura electro-optic, thermooptic, acoustooptic, zvese zvinoonekwa, dzidziso huru yemhedzisiro yeelectro-optic.
Optical modulator ndeimwe yemidziyo yakakosha yekubatanidza optical mukukurukurirana kwe optical nekukurumidza uye kwenguva pfupi. Modulator yechiedza maererano nemutemo wayo we modulation, inogona kukamurwa kuita electro-optic, thermooptic, acoustooptic, zvese optical, nezvimwewo, zvakavakirwa padzidziso huru ine mhando dzakasiyana dze electro-optic effect, acoustooptic effect, magnetooptic effect, Franz-Keldysh effect, quantum well Stark effect, carrier dispersion effect.
Iyomodulator yemagetsi-opticalmudziyo unodzora refractive index, absorptivity, amplitude kana phase yechiedza chinobuda kuburikidza nekuchinja kwevoltage kana electric field. Unopfuura mamwe marudzi emodulator maererano nekurasikirwa, kushandiswa kwesimba, kumhanya uye kubatanidzwa, uye zvakare ndiwo modulator inonyanya kushandiswa pari zvino. Mukuita kwe optical transmission, transmission uye reception, optical modulator inoshandiswa kudzora simba rechiedza, uye basa rayo rakakosha zvikuru.
Chinangwa chekuchinja kwechiedza ndechekushandura chiratidzo chinodiwa kana ruzivo rwunotumirwa, kusanganisira "kubvisa chiratidzo chekumashure, kubvisa ruzha, uye kudzivirira kupindira", kuitira kuti zvive nyore kugadzirisa, kutumira uye kuona.
Mhando dzekuchinja dzinogona kukamurwa kuita zvikamu zviviri zvakakura zvichienderana nekuti ruzivo rwunoiswa kupi pachiedza:
Imwe isimba rekufambisa rechiedza rinogadziriswa nechiratidzo chemagetsi; Imwe ndeyekugadzirisa nhepfenyuro zvakananga.
Yekutanga inonyanya kushandiswa pakutaurirana kwemaziso, uye yekupedzisira inonyanya kushandiswa pakuona kwemaziso. Muchidimbu: modulation yemukati uye external modulation.
Zvichienderana nenzira yekushandura, mhando yekushandura ndeiyi:
3) Kuchinja kwepolarization;
4) Kuchinja kwehuwandu hwenguva uye urefu hwewavelength.
1.1, kushandura simba
Kuchinja kwesimba rechiedza ndiko kusimba kwechiedza sechinhu chinochinja, kushandiswa kwezvinhu zvekunze kuyera DC kana kuchinja zvishoma nezvishoma kwechiratidzo chechiedza kuita shanduko yefrequency inokurumidza yechiratidzo chechiedza, kuitira kuti amplifier yekusarudza frequency yeAC igone kushandiswa kuwedzera, uye huwandu hunofanira kuyerwa nguva dzose.
1.2, kuchinja kwechikamu
Nheyo yekushandisa zvinhu zvekunze kushandura chikamu chemafungu echiedza uye kuyera huwandu hwemuviri nekuona shanduko dzechikamu inonzi optical phase modulation.
Chikamu chemafungu echiedza chinotsanangurwa nehurefu hwechiedza chinopararira, refractive index yenzvimbo inopararira uye kugoverwa kwayo, kureva kuti, shanduko yechikamu chemafungu echiedza inogona kugadzirwa nekushandura maparamita ari pamusoro apa kuti pave nekuchinja kwechikamu.
Nekuti chinzvereso chechiedza hachiwanzo kwanisa kuona shanduko yechikamu chemafungu echiedza, tinofanira kushandisa tekinoroji yekupindira kwechiedza kushandura shanduko yechikamu kuita shanduko yesimba rechiedza, kuti tikwanise kuona huwandu hwekunze hwemuviri, saka, optical phase modulation inofanira kusanganisira zvikamu zviviri: chimwe inzira yepanyama yekugadzira shanduko yechikamu chemafungu echiedza; chechipiri kupindira kwechiedza.
1.3. Kuchinja kwepolarization
Nzira iri nyore yekuwana modulation yechiedza ndeyekutenderedza ma polarizer maviri akaenzana. Sekureva kwedzidziso yaMalus, simba rechiedza chinobuda ndiro I=I0cos2α.
Kupi: I0 inomiririra simba rechiedza rinopfuudzwa nema polarizer maviri kana plane huru yakabatana; Alpha inomiririra Angle iri pakati peplane huru mbiri dze polarizer.
1.4 Kuchinja kwefrequency uye wavelength
Nheyo yekushandisa zvinhu zvekunze kuchinja frequency kana urefu hwechiedza uye kuyera huwandu hwekunze hwechiedza nekuona shanduko muhuwandu kana urefu hwechiedza inonzi frequency uye wavelength modulation yechiedza.
Nguva yekutumira: Nyamavhuvhu-01-2023