Kudzora upamhi hwepulsekudzora kwekurova kwemoyo nelasertekinoroji
Kudzora kwemoyo kwe laser ndeimwe yenzira dzakakosha dzekubatsiratekinoroji yelaser, izvo zvinokanganisa zvakananga mashandiro uye mashandisirwo elaser. Pepa iri richagadzirisa zvakarongeka kudzora pulse width, pulse frequency control uye tekinoroji yekuchinja manzwi ine chekuita nazvo, uye richaedza kuva nehunyanzvi, hwakakwana uye hune musoro.
1. Pfungwa yehupamhi hwekurova kwemoyo
Upamhi hwePulse hwelaser hunoreva nguva yekurova kwemoyo kwelaser, inova chinhu chakakosha kutsanangura hunhu hwenguva yekushanda kwelaser. Kune ma-laser ekurova kwemoyo mapfupi (akadai se nanosecond, picosecond uye femtosecond), hupamhi hwekurova kwemoyo hupfupi, simba repamusoro rinokwira, uye mhedzisiro yekupisa inoderera, iyo yakakodzera kugadzirwa nemazvo kana kutsvagurudza kwesainzi.
2. Zvinhu zvinokanganisa upamhi hwekurova kwemoyo kwelaser. Upamhi hwekurova kwemoyo hwelaser hunokanganiswa nezvinhu zvakasiyana-siyana, kunyanya zvinosanganisira zvinotevera:
a. Hunhu hwe gain medium. Mhando dzakasiyana dze gain media dzine chimiro chesimba chakasiyana uye hupenyu hwe fluorescence, izvo zvinokanganisa zvakananga kugadzirwa uye upamhi hwe pulse ye laser pulse. Semuenzaniso, solid-state lasers, Nd:YAG crystals uye Ti:Sapphire crystals imhando ye solid-state laser media. Gas lasers, dzakadai se carbon dioxide (CO₂) lasers uye helium-neon (HeNe) lasers, dzinowanzo gadzira ma pulse akareba nekuda kwechimiro chawo chemamorekuru uye hunhu hwe excited state; Semiconductor lasers, nekudzora nguva ye carrier recombination, inogona kuwana pulse widths kubva pa nanoseconds kusvika pa picoseconds.
Kugadzirwa kwelaser cavity kune simba guru pahupamhi hwepulse, kusanganisira: kureba kwecavity, kureba kwelaser cavity kunosarudza nguva inodiwa kuti chiedza chifambe kakawanda mucavity, cavity yakareba inotungamira kuhupamhi hwepulse hwakareba, nepo cavity pfupi ichibatsira kugadzirwa kweultra-short pulses; Reflection: Reflector ine high reflection inogona kuwedzera photon density mucavity, nokudaro ichivandudza gain effect, asi high reflection inogona kuwedzera kurasikirwa mucavity uye kukanganisa kugadzikana kwepulse width; Nzvimbo ye gain medium nenzvimbo ye gain medium mucavity zvichakanganisawo nguva yekudyidzana pakati pe photon ne gain medium, uye zvobva zvakanganisa pulse width.
c. Tekinoroji yeQ-switching uye tekinoroji yemode-locking inzira mbiri dzakakosha dzekuita kuti pulse laser output uye pulse width regulation ishande.
d. Pombi inobva uye pombi inoshandiswa Kugadzikana kwesimba repombi inobva uye kusarudzwa kwepombi inoshandiswa zvinewo simba guru pahupamhi hwepulse.
3. Nzira dzakajairika dzekudzora upamhi hwekurova kwemoyo
a. Chinja maitiro ekushanda kwelaser: maitiro ekushanda kwelaser achakanganisa zvakananga upamhi hwepulse yayo. Upamhi hwepulse hunogona kudzorwa nekugadzirisa ma parameter anotevera: frequency uye simba repombi, simba rinopinda repombi, uye mwero wekuchinja kweparticle popu mu gain medium; Kuratidzwa kwelenzi inobuda kunoshandura kushanda kwemhinduro mu resonator, nokudaro kuchikanganisa maitiro ekugadzira pulse.
b. Dzora chimiro chekurova kwemoyo: gadzirisa upamhi hwekurova kwemoyo nenzira isina kunanga nekuchinja chimiro chekurova kwemoyo kwelaser.
c. Kuchinja kwemagetsi: Nekuchinja simba remagetsi rinobuda kuti ritonge kupararira kwesimba remagetsi mu laser medium, uye wobva wachinja hupamhi hwekurova kwemoyo. Nzira iyi ine kumhanya kwekupindura nekukurumidza uye yakakodzera mamiriro ekushandisa anoda kugadziriswa nekukurumidza.
d. Kuchinja modulation: nekudzora mamiriro ekuchinja kwelaser kuti ugadzirise upamhi hwepulse.
e. Kudzora tembiricha: shanduko dzetembiricha dzichakanganisa chimiro chesimba remaerekitironi relaser, nokudaro zvichikanganisa upamhi hwekurova kwemoyo.
f. Shandisa tekinoroji yekuchinja: Tekinoroji yekushandura inzira inoshanda yekudzora upamhi hwepulse nemazvo.
Kuchinja kweLaserTekinoroji itekinoroji inoshandisa laser semutakuri uye inoisa ruzivo pairi. Zvichienderana nehukama ne laser zvinogona kukamurwa kuita internal modulation uye external modulation. Internal modulation inoreva modulation mode umo modulated signal inoiswa mukati me laser oscillation kuti ichinje ma parameter e laser oscillation uye nokudaro ichinje ma features e laser output. External modulation inoreva modulation mode umo modulation signal inowedzerwa mushure mekunge laser yagadzirwa, uye output laser properties inochinjwa pasina kuchinja ma oscillation parameters e laser.
Tekinoroji yekushandura inogonawo kupatsanurwa zvichienderana nemafomu ekufambisa, kusanganisira analog modulation, pulse modulation, digital modulation (pulse code modulation); Zvichienderana neparameters dzekushandura, yakakamurwa kuita intensity modulation uye phase modulation.
Modulator yesimba: Upamhi hwekurova kwemoyo hunodzorwa nekugadzirisa kuchinja kwesimba rechiedza chelaser.
Modulator yechikamu: Upamhi hwekurova kwemoyo hunogadziriswa nekuchinja chikamu chemafungu echiedza.
Phase-locked amplifier: Kuburikidza ne phase-locked amplifier modulation, upamhi hwe laser pulse hunogona kugadziriswa nemazvo.
Nguva yekutumira: Kurume-24-2025