Horumar! Laser-ka fiber-ka femtosecond ee awoodda ugu badan adduunka ee 3 μm ee dhexdhexaadka ah ee infrared

Horumar! Awoodda ugu sarreysa adduunka 3 μm bartamaha infrared-kalaser fiber femtosecond

Laser-ka faybarkaSi loo gaaro wax soo saarka laser-ka dhexe ee infrared-ka, tallaabada ugu horreysa waa in la doorto maaddada fiber-ka ee ku habboon. Laser-yada fiber-ka ee ku dhow infrared-ka, matrix-ka galaaska quartz waa maaddada fiber-ka ugu badan ee leh lumis gudbin aad u yar, xoog farsamo oo la isku halleyn karo iyo xasillooni aad u wanaagsan. Si kastaba ha ahaatee, sababtoo ah tamarta phonon-ka sare (1150 cm-1), fiber-ka quartz looma isticmaali karo gudbinta laser-ka dhexe ee infrared-ka. Si loo gaaro gudbinta khasaaraha yar ee laser-ka dhexe ee infrared-ka, waxaan u baahanahay inaan dib u dooranno agabyada kale ee fiber-ka matrix-ka oo leh tamar phonon oo hooseeya, sida matrix-ka galaaska sulfide ama matrix-ka galaaska fluoride-ka. Faybarka sulfide-ka wuxuu leeyahay tamar phonon oo ugu hooseeya (qiyaastii 350 cm-1), laakiin waxay leedahay dhibaatada ah in fiirsashada doping-ka aan la kordhin karin, sidaa darteed kuma habboona in loo isticmaalo sidii fiber gain si loo soo saaro laser-ka dhexe ee infrared-ka. In kasta oo substrate-ka galaaska fluoride uu leeyahay tamar phonon ah oo xoogaa ka sarreeya (550 cm-1) marka loo eego substrate-ka galaaska sulfide, haddana waxa uu sidoo kale gaari karaa gudbin lumis yar oo loogu talagalay laser-yada dhexe ee infrared-ka oo leh hirarka hirarka oo ka yar 4 μm. Waxaa ka sii muhiimsan, substrate-ka galaaska fluoride wuxuu gaari karaa uruurinta daawada ion-ka dhulka oo aad u dhif ah, taas oo bixin karta faa'iidada loo baahan yahay soo saarista laser-ka dhexe ee infrared-ka, tusaale ahaan, fiber-ka fluoride ZBLAN ee ugu bislaaday Er3+ wuxuu awooday inuu gaaro uruurinta daawada ilaa 10 mol. Sidaa darteed, matrix-ka galaaska fluoride waa walaxda ugu habboon ee fiber-ka laser-ka fiber-ka dhexe.

Dhawaan, kooxda Professor Ruan Shuangchen iyo Professor Guo Chunyu ee Jaamacadda Shenzhen waxay sameeyeen farsamo femtosecond oo awood sare lehlaser-ka fiber garaaca wadnahaka kooban 2.8μm oo ah oscillator-ka fiilada Er:ZBLAN ee qaabka xiran, hal-qaab oo ah Er:ZBLAN preamplifier fiber iyo goob weyn oo ah cod-weyneeyaha ugu weyn ee fiilada Er:ZBLAN.
Iyada oo ku saleysan aragtida is-caddeynta iyo ballaarinta ee garaaca wadnaha ee dhexdhexaadka ah ee ultra-gaaban ee infrared oo ay maamusho xaaladda kala-soocidda iyo shaqada jilitaanka tirooyinka ee kooxdeenna cilmi-baarista, oo ay weheliso xakamaynta aan tooska ahayn iyo hababka xakamaynta qaabka ee fiber-ka indhaha ee qaabka weyn, tignoolajiyada qaboojinta firfircoon iyo qaab-dhismeedka kor u qaadista ee bamka laba-geesoodka ah, nidaamku wuxuu helaa wax soo saar garaaca ultra-gaaban 2.8μm oo leh awood celcelis ahaan 8.12W iyo ballac garaaca 148 fs. Rikoorka caalamiga ah ee awoodda celceliska ugu sarreysa ee ay gaarto kooxdan cilmi-baarista ayaa si dheeraad ah loo cusbooneysiiyay.

Jaantuska 1aad Jaantuska qaab-dhismeedka ee leyser-ka fiilada Er:ZBLAN oo ku salaysan qaab-dhismeedka MOPA
Qaab-dhismeedkalaser femtosecond ahnidaamka waxaa lagu muujiyay Jaantuska 1. Faybarka Er:ZBLAN ee laba-laaban ee hal-qaabka ah oo dhererkiisu yahay 3.1 m ayaa loo isticmaalay sidii fiilada gain ee preamplifier-ka iyadoo xoogga doping-ku uu yahay 7 mol.% iyo dhexroorka xudunta ah ee 15 μm (NA = 0.12). Qalabka cod-weyneeyaha ugu weyn, fiilada laba-laaban ee qaabka weyn ee Er:ZBLAN oo dhererkeedu yahay 4 m ayaa loo isticmaalay fiilada gain oo leh xoogga doping-ka ee 6 mol.% iyo dhexroorka xudunta ah ee 30 μm (NA = 0.12). Dhexroorka xudunta weyn wuxuu ka dhigayaa fiilada gain inay leedahay isku-xidhnaan aan toosnayn oo hooseeya waxayna u adkeysan kartaa awoodda ugu sarreysa iyo wax soo saarka garaaca ee tamarta garaaca weyn. Labada daraf ee fiilada gain waxaa lagu daray daboolka terminal-ka ee AlF3.