Classification uye modulation chirongwa che laser modulator

Classification uye modulation chirongwa che laser modulator

Laser modulatorimhando yekudzora laser zvikamu, haina kukosha sekristaro, lenzi uye zvimwe zvinhu, kana zvakanyanya kusanganiswa semalaser,Laser midziyo, yakakwira dhigirii yekubatanidzwa, mhando uye mabasa echigadzirwa kirasi zvigadzirwa. Kubva pakutaura kwakaoma kwechiedza chechiedza, zvinogona kuonekwa kuti zvinhu zvinokanganisa chiedza chechiedza chakasimba A (r), chikamu Φ (r), frequency ω uye zvikamu zvina zvegwara rekuparadzira, nekudzora zvinhu izvi zvinogona kushandura mamiriro echiedza chechiedza, iyo inoenderana laser modulator ndiyointensity modulator, phase modulator, frequency shifter uye deflector.

1. Intensity modulator: inoshandiswa kugadzirisa kusimba kana amplitude ye laser, iyo optical attenuators, optical magedhi ndiyo inonyanya kumiririra, pamwe chete nemichina yakabatanidzwa uye zvishandiso zvakadai sezvikamu zvenguva, simba rekugadzirisa, zvigadziridzo zveruzha.

2. Phase modulator: inoshandiswa kudzora chikamu chedanda, kuwedzera kwechikamu kunonzi lag, kuderera kwechikamu kunonzi lead. Kune akawanda marudzi echikamu modulators, uye misimboti yavo yekushanda yakasiyana zvakanyanya, senge photoelastic modulators, LN yakakwira-kumhanya electro-optical phase modulators, liquid crystal variable phase kunonoka mapepa, etc.

3. Frequency shifter: inoshandiswa kushandura kuwanda kwemafungu echiedza, inoshandiswa zvakanyanya mu-high-end laser systems kana mapping equipment, ine acousto-optical frequency shifter semumiririri wemazuva ose.

4. Deflector: inoshandiswa kushandura nzira yekuparadzira danda, iyo yakajairwa galvanometer system ndeimwe yavo, kunze kwekukurumidza mems galvanometer, electro-optical deflector uye acousto-optical deflector.

Isu tine pfungwa yakajairika yeiyo laser modulator, ndiko kuti, izvo zvikamu zvinogona kudzora zvine simba uye kushandura zvimwe zvemuviri zvimiro zvelaser, asi tichida kusuma zvizere zvigadzirwa zvelaser modulator, chinyorwa chete chiri kure nekukwana. Saka, chekutanga pane zvese, tarisa pane intensity modulator. Intensity modulator semhando yemodulator inoshandiswa zvakanyanya mumhando dzese dzemaziso masisitimu, akasiyana-siyana, maitiro akasiyana anogona kutsanangurwa seakaomesesa, nhasi kukuzivisa iwe ina yakajairika intensity modulator chirongwa: mechanical scheme, electro-optic scheme, acousto-optic scheme uye liquid crystal scheme.

1. Mechanical scheme: mechanical simba modulator ndiyo yekutanga uye inonyanya kushandiswa simba modulator. Nheyo iyi ndeyekushandura reshiyo ye s mwenje uye p mwenje mupolarized mwenje nekutenderedza hafu-wave ndiro, uye kupatsanura mwenje nepolarizer. Kubva pagadziriso yekutanga yemanyorero kusvika kune yanhasi yakanyanya otomatiki uye yakakwirira-chaiyo, mhando yechigadzirwa uye kuvandudza kwekushandisa kwave kwakakura kwazvo.

2. Electro-optical scheme: electro-optical intensity modulator inogona kuchinja kusimba kana amplitude yechiedza chepolarized, nheyo yacho inobva paPockels effect ye electro-optical crystals. Iyo polarization mamiriro eiyo polarized beam inoshanduka mushure meiyo electro-optic crystal ine electric field inoshandiswa, uye ipapo polarization inosarudzwa zvakakamurwa ne polarizer. Kusimba kwechiedza chinobudiswa chinogona kudzorwa nekushandura kusimba kwemunda wemagetsi, uye kukwira / kudonha kumucheto kwen magnitude kunogona kusvika.

3. Acousto-optic scheme: acousto-optic modulator inogonawo kushandiswa seyakasimba modulator. Nokushandura kusiyanisa kushanda, simba re 0 chiedza uye 1 chiedza chinogona kudzorwa kuti uwane chinangwa chekugadzirisa chiedza chechiedza. Acoustooptic gedhi (optical attenuator) ine hunhu hwekukurumidza modulation kumhanya uye yakakwirira kukuvara chikumbaridzo.

4 Liquid crystal solution: liquid crystal device inowanzo shandiswa sendiro inoshanduka yewave kana kuti inotakurika sefa, nekuisa dhiraivha kumagumo ese emvura yekristaro bhokisi kuti uwedzere chaiyo polarization element, inogona kugadzirwa kuita yemvura yekristaro shutter kana inoshanduka attenuator, chigadzirwa chine aperture yakakura kuburikidza nechiedza, yakakwirira kuvimbika maitiro.