Ukulawula ububanzi be-Pulsei-laser pulse controlubuchwepheshe
Ukulawulwa kwe-pulse kwe-laser kungenye yezixhumanisi ezibalulekile kuubuchwepheshe be-laser, okuthinta ngokuqondile ukusebenza kanye nomphumela wokusetshenziswa kwe-laser. Leli phepha lizohlunga ngendlela ehlelekile ukulawulwa kobubanzi be-pulse, ukulawulwa kwefrikhwensi ye-pulse kanye nobuchwepheshe bokuguquguquka obuhlobene, futhi lilwela ukuba ngochwepheshe, elibanzi futhi elinengqondo.
1. Umqondo wobubanzi be-pulse
I-Pulse Width ye-laser isho ubude besikhathi sokushaywa kwe-laser, okuyipharamitha eyinhloko yokuchaza izici zesikhathi zokukhishwa kwe-laser. Kuma-laser we-ultra-short pulse (njengama-nanosecond, picosecond kanye nama-laser e-femtosecond), lapho kuba mfishane ububanzi be-pulse, amandla aphezulu aphezulu, kanye nomphumela wokushisa omncane, ofanele ukunemba kwemishini noma ucwaningo lwesayensi.
2. Izinto ezithinta ububanzi be-laser pulse Ububanzi be-pulse ye-laser buthintwa izici ezihlukahlukene, ikakhulukazi ezihlanganisa izici ezilandelayo:
a. Izici ze- gain medium. Izinhlobo ezahlukene zemithombo yezindaba zinesakhiwo sezinga lamandla esiyingqayizivele kanye nempilo yonke ye-fluorescence, ethinta ngokuqondile isizukulwane nobubanzi be-pulse ye-laser pulse. Isibonelo, ama-laser wesimo esiqinile, amakristalu e-Nd:YAG kanye ne-Ti:Sapphire crystals ayimidiya ye-solid state evamile. Amalaser egesi, njengamalaser e-carbon dioxide (CO₂) namalaser e-helium-neon (HeNe), ngokuvamile akhiqiza ama-pulse amade ngenxa yesakhiwo sawo samangqamuzana kanye nezakhiwo zezwe ezijabulile; Ama-laser we-semiconductor, ngokulawula isikhathi sokuhlanganisa kabusha inkampani yenethiwekhi, angafinyelela ububanzi be-pulse kusuka kuma-nanoseconds kuya kuma-picoseconds.
Umklamo we-laser cavity unomthelela omkhulu kububanzi be-pulse, okuhlanganisa: ubude be-cavity, ubude be-laser cavity bunquma isikhathi esidingekayo ukuze ukukhanya kuhambe ngokuphindaphindiwe emgodini, umgodi omude uzoholela kububanzi be-pulse ende, kuyilapho i-cavity emfushane ivumela ukukhiqizwa kwama-ultra-short pulses; I-Reflectance: Isibonisi esibonakalisa phezulu singakhuphula ukuminyana kwe-photon emgodini, ngaleyo ndlela sithuthukise umphumela wokuzuza, kodwa ukubukeka okuphezulu kakhulu kungase kwandise ukulahlekelwa ku-cavity futhi kuthinte ukuzinza kobubanzi be-pulse; Ukuma kwendawo yokuzuza kanye nokuma kwendawo yokuzuza ku-cavity kuzophinde kuthinte isikhathi sokusebenzisana phakathi kwe-photon ne-gain medium, bese kuthinta ububanzi be-pulse.
c. Ubuchwepheshe bokushintsha i-Q kanye nobuchwepheshe bokukhiya imodi kuyizindlela ezimbili ezibalulekile zokubona ukuphuma kwe-pulse laser kanye nokulawulwa kobubanzi bokushaya kwenhliziyo.
d. Umthombo wepompo kanye nemodi yepompo Ukuzinza kwamandla omthombo wepompo kanye nokukhetha kwemodi yepompo nakho kunomthelela obalulekile kububanzi be-pulse.
3. Izindlela ezivamile zokulawula ububanzi be-pulse
a. Shintsha imodi yokusebenza ye-laser: imodi yokusebenza ye-laser izothinta ngqo ububanzi bayo be-pulse. Ububanzi be-pulse bungalawulwa ngokulungisa imingcele elandelayo: imvamisa namandla omthombo wepompo, okokufaka kwamandla omthombo wepompo, kanye nezinga lezinhlayiyana zokuguqulwa kwenani labantu endaweni yokuthola; Ukubonakala kwelensi yokuphumayo kushintsha ukusebenza kahle kwempendulo ku-resonator, ngaleyo ndlela kuthinte inqubo yokwakheka kwe-pulse.
b. Lawula ukuma kwe-pulse: lungisa ngokungaqondile ububanzi be-pulse ngokushintsha ukuma kwe-laser pulse.
c. Ukushintshashintsha kwamanje: Ngokushintsha amandla amanje okukhiphayo ukuze kulawuleke ukusatshalaliswa kwamandla kagesi endaweni ye-laser, bese ushintsha ububanzi be-pulse. Le ndlela inesivinini sokuphendula esisheshayo futhi ifanele izimo zohlelo ezidinga ukulungiswa ngokushesha.
d. Shintsha ukushintshashintsha: ngokulawula isimo sokushintsha se-laser ukuze ulungise ububanzi be-pulse.
e. Ukulawula izinga lokushisa: ukushintsha kwezinga lokushisa kuzothinta ukwakheka kwezinga lamandla e-electron ye-laser, ngaleyo ndlela kuthinte ngokungaqondile ububanzi be-pulse.
f. Sebenzisa ubuchwepheshe bokuguquguquka: Ubuchwepheshe bokuguquguquka buyindlela ephumelelayo yokulawula ngokunembile ububanzi be-pulse.
Ukushintshwa kwe-laserubuchwepheshe ubuchwepheshe obusebenzisa i-laser njengesithwali bese bulayisha ulwazi kuyo. Ngokusho ubudlelwano laser zingahlukaniswa zibe modulation yangaphakathi kanye modulation yangaphandle. Ukushintshashintsha kwangaphakathi kubhekisela kumodi yokushintshashintsha lapho isignali eshintshiwe ilayishwa khona ngenqubo ye-laser oscillation ukuze kushintshwe imingcele ye-laser oscillation futhi ngaleyo ndlela kuguqule izici zokuphuma kwe-laser. Ukuguquguquka kwangaphandle kubhekisela kumodi yokushintshashintsha lapho isignali yokushintshashintsha yengezwa ngemva kokwakhiwa kwe-laser, futhi izakhiwo ze-laser eziphumayo ziyashintshwa ngaphandle kokushintsha imingcele ye-oscillation ye-laser.
Ubuchwepheshe bokuguquguquka bungabuye bahlukaniswe ngokuvumelana namafomu okushintshashintsha kwenkampani yenethiwekhi, okuhlanganisa ukuguquguquka kwe-analog, ukuguqulwa kwe-pulse modulation, i-digital modulation (i-pulse code modulation); Ngokuya ngamapharamitha wokumodulisa, ihlukaniswe ngokushintshashintsha kokuqina kanye nokuguquguquka kwesigaba.
I-intensity modulator: Ububanzi be-pulse bulawulwa ngokulungisa ushintsho lwe-laser light intensity.
I-modulator yesigaba: Ububanzi be-pulse bulungiswa ngokushintsha isigaba segagasi lokukhanya.
Isikhulisi esikhiywa ngesigaba: Ngokushintshwa kwe-amplifier ekhiywe ngesigaba, ububanzi be-laser pulse bungalungiswa ngokunembile.
Isikhathi sokuthumela: Mar-24-2025