Lapha, umthelela wokulahleka kokuncipha kanye nokuthuthukiswa kokusebenza kwe-laser kwe-Nd:YAG ye-ceramics esobala kuye kwaphenywa.Isebenzisa induku engu-0.6 at.% Nd:YAG ceramic rod enobubanzi obungu-3 mm nobude obungu-65 mm,i-coefficient yokusabalalisa kanye ne-absorption coefficient ku-1064 nm kukalwa kube ngu-0.0001 cm-1 no-0.0017 cm-1, ngokulandelana.Ngokuhlolwa kwe-laser egxishwe eceleni engu-808 nm, amandla okukhiphayo ayisilinganiso angu-44.9 W afinyelelwe ngokusebenza kahle kokuguqulwa kwe-optical-to-optical okungu-26.4%, okwakucishe kufane nalokho kwe-1 at.% yekristalu eyodwa.Ukwamukela uhlelo lwe-885 nm oluqondile olumpompa ukuphela, ukuhlolwa kwe-laser okulandelayo kubonise ukusebenza kahle okuphezulu kokubona okungu-62.5% kanye namandla okukhipha aphezulu angu-144.8 W atholwe ngamandla epompo amuncwa angu-231.5 W. ku-Nd: YAG i-laser ceramic ngolwazi lwethu.Kufakazela ukuthi amandla aphezulu kanye nokukhishwa kwe-laser esebenza kahle kakhulu kungenziwa ngekhwalithi ephezulu yokubona i-Nd:YAG rod ye-ceramic kanye nobuchwepheshe bokumpompa obuqondile be-885 nm.
Leli phepha libonisa amandla aphezulu okushaya kwenhliziyo, ububanzi bomugqa obuncane, i-mid-infrared (MIR) laserat 6.45 µm, ngokusekelwe ku-BaGa4Se7 (BGSe) crystal optical parametric oscillator (OPO) empontshwa nge-laser engu-1.064 µm.Amandla okushaya kwenhliziyo aphezulu ku-6.45 µm ayefike ku-1.23 mJ, nobubanzi bepulse obungu-24.3 ns nezinga lokuphindaphinda elingu-10 Hz, elihambisana nempumelelo yokuguqulwa kwe-optical–optical engu-2.1%, ukusuka ekukhanyeni kwephampu okungu-1.064 µm kuya ku-idler light 4.45 µm6.Ububanzi bokukhanya obuvilaphayo babucishe bube ngu-6.8 nm. Okwamanje, sibale ngokunembile isimo sokufanisa isigaba se-OPO ku-BGSe crystal empontshwa nge-laser engu-1.064 µm, kanye nesistimu yokulingisa yezinombolo yenziwe ukuze kuhlaziywe okokufaka—okuphumayo ku-6.45 µm, kanye umphumela wobude bekristalu ekusebenzeni kahle kokuguqulwa.Kutholwe isivumelwano esihle phakathi kokulinganisa nokulingisa.Ngolwazi lwethu olungcono kakhulu, lawa amandla amakhulu kakhulu e-pulse ku-6.45 µm, anobubanzi bomugqa obuncane kunawo wonke wanoma iyiphi i-MIR ns laser yesimo esiqinile yonke ku-BGSe-OPO empontshwa i-oscillator elula engu-1.064 µm.Le sistimu ye-OPO elula nehlangene engu-6.45 µm, enamandla okushaya kwenhliziyo ephezulu kanye nobubanzi obuncane bomugqa, ingahlangabezana nezimfuneko zokusikwa kwezicubu futhi ithuthukise ukunemba kokukhishwa kwezicubu.
Kuleli phepha, sibonisa ilaser ye-langasite (LGS) electro-optic Ho:YAG cavity-dumped laser ecindezela ukuncika kwenzuzo kwesikhathi sokushaya kwenhliziyo kumalaser ashintshiwe nge-Q.Ubude be-pulse obungaguquki obungu-7.2 ns bufinyelelwe ngenani lokuphindaphinda elingu-100 kHz.Ukuzuza kukristalu ye-LGS akunawo umthelela wokuhlehla wendandatho ye-piezoelectric ehlehlayo kanye ne-depolarization eyengelwe ukushisa, isitimela esishayelayo esizinzile sitholwe ngamandla okukhipha angu-43 W. Ngokokuqala ngqa, ukusetshenziswa kwe-laser ye-cavity-dumped in the mid-infrared (maphakathi no- I-IR) i-ZnGeP2 (ZGP) i-oscillator yepharamitha ekhanyayo (i-OPO) yenziwe, ihlinzeka ngendlela enokwethenjelwa yokufinyelela amazinga aphezulu okuphindaphinda kanye nezikhathi ezimfushane ze-nanosecond pulse yama-ZGP OPO amaphakathi ne-infrared enamandla amakhulu.Amandla okukhiphayo amaphakathi ayengu-15 W, ahambisana nobude be-pulse engu-4.9 ns kanye nezinga lokuphindaphinda elingu-100 kHz.
Sikhombisa okokuqala ukukhiqizwa kwe-octave-spanning mid-infrared kusetshenziswa ikristalu engaqondile ye-BGSe.Isistimu ye-laser ye-Cr:ZnS eletha ama-pulses angu-28-fs kubude obumaphakathi obungu-2.4 µm isetshenziswa njengomthombo wepompo, oshayela ukukhiqizwa komehluko wangaphakathi kwe-pulse ngaphakathi kwekristalu ye-BGSe.Njengomphumela, i-broadband ehambisanayo eqhubekayo ye-infrared esukela ku-6 ukuya ku-18 µm itholiwe.Kubonisa ukuthi ikristalu ye-BGSe iyinto ethembisayo ye-broadband, isizukulwane esimaphakathi ne-infrared emijikelezweni embalwa ngokuguqulwa kwe-frequency phansi ngemithombo yepompo ye-femtosecond.
1.53 W all-solid-state nanosecond pulsed mid-infrared laser at 6.45 µm
