Kupatsanura uye modulation scheme ye laser modulator

Kupatsanura uye modulation scheme ye laser modulator

Modulator yeLaserrudzi rwezvinhu zve laser zvinodzora, hazvina kunyanya kuoma semakristaro, malenzi nezvimwe zvinhu, uye hazvina kunyanya kubatanidzwa sema laser,michina yelaser, imhando yepamusoro yekubatanidzwa, mhando uye mashandiro ezvigadzirwa zvekirasi yemidziyo. Kubva pakuratidzwa kwakaoma kwemafungu echiedza, zvinogona kuonekwa kuti zvinhu zvinokanganisa mafungu echiedza intensity A(r), phase Φ(r), frequency ω uye zvinhu zvina zvenzira yekupararira, nekudzora zvinhu izvi zvinogona kushandura mamiriro emafungu echiedza, laser modulator inoenderana ndiyomodulator yesimba, phase modulator, frequency shifter uye deflector.

1. Modulator yesimba: inoshandiswa kugadzirisa simba kana amplitude yelaser, iyo ma attenuator e optical, ma optical gates ndiwo anonyanya kuratidzwa, pamwe chete nemidziyo yakabatanidzwa nemidziyo yakaita se time dividers, power stabilizers, uye noise attenuators.

2. Modulator yechikamu: inoshandiswa kudzora chikamu chedanda, kuwedzera kwechikamu kunonzi lag, kudzikira kwechikamu kunonzi lead. Kune mhando dzakawanda dzemamodulators echikamu, uye misimboti yavo yekushanda yakasiyana zvikuru, senge mamodulators ephotoelastic, mamodulators eLN high-speed electro-optical phase, masheets ekunonoka emvura anochinja-chinja, nezvimwewo, ese ari mamodulators echikamu akavakirwa pamisimboti yekushanda yakasiyana.

3. Frequency shifter: inoshandiswa kushandura frequency yemafungu echiedza, inoshandiswa zvakanyanya mumasystem elaser emhando yepamusoro kana michina yemepu, ine acousto-optical frequency shifter semumiriri wenguva dzose.

4. Deflector: inoshandiswa kushandura divi rekupararira kwemwaranzi, sisitimu ye galvanometer yakajairika ndeimwe yacho, kuwedzera kune galvanometer inokurumidza, deflector ye electro-optical uye acousto-optical deflector.

Tine pfungwa yakajairika ye laser modulator, kureva kuti, zvikamu zvinogona kudzora nekuchinja zvimwe zvinhu zvemuviri zve laser, asi tinoda kuunza zvizere zvigadzirwa zve laser modulator, chinyorwa chimwe chete hachina kukwana. Saka, chekutanga, tarisa pane intensity modulator. Intensity modulator semhando ye modulator inoshandiswa zvakanyanya mumhando dzese dze optical systems, mhando dzayo, mashandiro akasiyana anogona kutsanangurwa seakaoma, nhasi kuti tikuunzirei mana common intensity modulator scheme: mechanical scheme, electro-optic scheme, acousto-optic scheme uye liquid crystal scheme.

1. Maitiro ekugadzira: modulator yesimba remuchina ndiyo modulator yekutanga uye inonyanya kushandiswa zvakanyanya yesimba. Nheyo ndeyekuchinja chiyero chechiedza ches nechiedza chep muchiedza chakapatsanurwa nekutenderedza ndiro yehafu-wave, uye kupatsanura chiedza nepolarizer. Kubva pakugadzirisa kwekutanga nemaoko kusvika kune yanhasi inoshanda otomatiki uye yakanyatsogadzirwa, mhando dzezvigadzirwa zvayo uye kugadzirwa kwekushandisa kwave kwakakura zvikuru.

2. Electro-optical scheme: electro-optical intensity modulator inogona kushandura simba kana amplitude ye polarized light, musimboti wacho wakavakirwa paPockels effect yema electro-optical crystals. Mamiriro e polarization ye polarized beam anochinja mushure mekunge electro-optic crystal ine electric field yashandiswa, uye polarization inokamurwa nenzira yakasarudzwa ne polarizer. Simba rechiedza chinoburitswa rinogona kudzorwa nekuchinja simba re electric field, uye kukwira/kudonha kwe ns magnitude kunogona kusvikwa.

3. Acousto-optic scheme: acousto-optic modulator inogonawo kushandiswa se intensity modulator. Nekuchinja kushanda kwe diffraction, simba re 0 light ne 1 light rinogona kudzorwa kuti rigadzirise simba rechiedza. Acoustooptic gate (optical attenuator) ine hunhu hwekumhanya kwe modulation nekukurumidza uye high damage threshold.

4 Mhinduro yekristaro yemvura: mudziyo wekristaro yemvura unowanzo shandiswa seplate yewave inoshanduka kana sefa inogadziriswa, nekushandisa voltage yekutyaira kumativi ese ebhokisi rekristaro yemvura kuti uwedzere chinhu chakanyatsojeka, inogona kugadzirwa kuita shutter yekristaro yemvura kana attenuator inoshanduka, chigadzirwa chacho chine mukana wakakura kuburikidza nehunhu hwechiedza, hwakavimbika.