RPMC Layisi ya picosecond mu makolero neoMOS-70ps

Okulambika kw’ebintu n’Eby’ekikugu

neoMOS-70ps kikiikirira nnyo enkola za layisi eza picosecond ez’omutindo gw’amakolero ezaakolebwa neoLASE eya Girimaani, era mmemba wa neoMOS ultrashort pulse laser series. Omusinde guno gulimu ebika ebirina obugazi bwa pulse obw’enjawulo, okuva ku femtosecond neoMOS 700fs okutuuka ku picosecond neoMOS 10ps ne neoMOS 70ps, nga bikola ekisengejjo kya laser ya pulse eya ultrashort enzijuvu7. neoMOS-70ps ekoleddwa mu ngeri ey’enjawulo eri embeera z’amakolero ezitambula obutasalako, ng’egatta tekinologiya ow’omulembe aga fiber oscillator n’enzimba eyesigika ey’okugaziya amplifier mu mbeera enzigumu, era eraga omulimu ogw’ekitalo mu kisaawe ky’okukola micromachining entuufu.

Okusinziira ku ndowooza y'ensonda ez'ekikugu, neoMOS series ekiikirira okukuŋŋaanyizibwa okw'ekikugu okwa neoLASE mu kisaawe kya layisi ez'embeera enkalu, era obufirosoofo bwayo obw'okukola eggumiza bbalansi wakati wa "okwesigamizibwa" ne "okuddaabiriza okutono"1. Bw’ogeraageranya n’enkola za layisi ez’ennono ez’amangu ennyo, neoMOS-70ps esuula tekinologiya omuzibu owa CPA (chirped pulse amplification) n’etwala ensengekera ya MOPA (master oscillator power amplifier) ​​ennyangu era ennungi, ekitakoma ku kukendeeza ku sayizi y’enkola, naye era erongoosa nnyo enkola y’okukyusa amaanyi. Endowooza eno eya dizayini eddamu obwetaavu obw’amangu obw’amakolero obw’okukendeeza n’okugatta ebyuma, ekifuula obunene bw’omutwe gwa layisi okufugibwa ku 330mm×220mm×90mm (15W version) eyeewuunyisa, ekiyamba ennyo okugatta enkola.

Okuvuganya okukulu okwa neoMOS-70ps kweyolekera mu kuwangaala kwayo okw’omutindo gw’amakolero. Ebyuma bino bikoleddwa okukola obutasalako 24/7, era obudde wakati w’okulemererwa (MTBF) busukka wala obwa layisi eziri ku ddaala lya laboratory, olw’enteekateeka etali ya mugaso ey’ebitundu ebikulu n’okugezesa okukakali okw’okukyusa obutonde bw’ensi7. Enkola ya layisi yeettanira enzimba ya modulo, okusinga nga mulimu ebitundu bitaano: ensibuko y’ensigo (fiber oscillator), preamplifier, main amplifier, harmonic generator (optional) ne control unit. Mu byo, ensibuko y’ensigo yeesigamiziddwa ku kupampagira kwa layisi dayode okwesigika okukola ebiwujjo bya picosecond ebisookerwako; omutendera gwa amplifier gukozesa tekinologiya ow’okugaziya mu mbeera ennywevu okukakasa obwesigwa bw’engeri z’okukuba (pulse characteristics) mu kiseera ky’okutumbula amaanyi.

Okusinziira ku ndowooza y’okuteeka akatale, neoMOS-70ps okusinga egendereddwamu kisaawe ky’okulongoosa ebintu mu ngeri ey’obutuufu obw’amaanyi, omuli naye nga tekikoma ku kukola ebintu eby’amasannyalaze n’ebyuma, okulongoosa endabirwamu ez’okwolesebwa, n’okukozesa obubonero obw’obukuumi n’okuyooyoota. Mu bitundu bino, obugazi bw’omukka gwa 70ps buwa okufuga okulungi ennyo okw’ekitundu okukosebwa ebbugumu ate nga kwewala obuzibu n’omuwendo gw’ebiwujjo ebimpi ennyo (nga layisi za femtosecond). Layisi ewagira okutereeza omutindo gw’okuddiŋŋana okukyukakyuka (okuva ku kimu okutuuka ku 80MHz) n’okufuga amaanyi g’okukuba (okutuuka ku 250μJ), ekiyinza okukyusakyusa mu byetaago by’okukola eby’enjawulo.

Ebipimo by’ebyekikugu n’engeri y’emirimu

Layisi ya neoMOS-70ps picosecond erina omulimu omulungi ennyo mu bintu bingi eby’ekikugu olw’enteekateeka yaayo eya yinginiya ennungi, ng’etuukiriza mu bujjuvu ebyetaago by’okukola obulungi mu makolero. Okutegeera ennyo ebiraga bino eby’ekikugu kikulu nnyo mu kulonda ebyuma, okukola enkola n’okugatta enkola. Ekitundu kino kijja kwekenneenya ebipimo ebikulu ebya layisi n’amakulu ag’ekikugu agali emabega waabyo mu bujjuvu okuyamba abakozesa okutegeera mu bujjuvu engeri z’omutindo gw’ebyuma.

Ebifaananyi ebikulu ebifulumizibwa

Obuwanvu bw’amayengo ag’omu makkati ga neoMOS-70ps buli 1064nm, nga gano ga mu kitundu kya near-infrared spectrum range. Obuwanvu bw’amayengo buno bulina engeri entuufu ey’okunyiga ebintu eby’enjawulo eby’amakolero, era busobola okukyusibwa obulungi okufuuka ekitangaala ekya kiragala (532nm) oba ekitangaala kya ultraviolet (355nm/266nm) okuyita mu kirisitaalo ezitali za linnya okutuukiriza ebyetaago eby’enjawulo eby’okukozesa24. Layisi egaba amaanyi agafuluma aga wakati aga 15W, nga gano ga maanyi ga wakati okutuuka ku waggulu mu layisi za picosecond era nga gamala emirimu egisinga egya micromachining. Amasoboza gaayo aga pulse emu gasobola okutuuka ku 250μJ, nga gawa omusingo gw’amasoboza ogumala okulongoosa ebintu ebirina omusingi ogw’amaanyi.

Obugazi bwa pulse gwe musingi gw’okutuuma amannya n’ekintu ekikulu ekya neoMOS-70ps, ekifugibwa ddala ku picoseconds 70 (femtoseconds 70,000)4. Obugazi bwa pulse buno mu magezi bugerageranya obutuufu bw’okukola n’obuzibu bw’enkola - bw’ogeraageranya ne layisi za nanosecond, ekitundu ekikoseddwa ebbugumu kikendeera nnyo, era akabi k’okwonooneka kw’amaaso okuva ku maanyi g’entikko amangi ennyo aga layisi za femtosecond bwewalibwa. Layisi ewagira enkyukakyuka nnyingi ez’okuddiŋŋana frequency okuva ku single emission okutuuka ku 80MHz, era abakozesa basobola okulonda mu ngeri ekyukakyuka okusinziira ku processing efficiency and accuracy requirements2. Kinajjukirwa nti ekyuma kisobola okubeera ne "Burst mode" (pulse train mode), ekiyinza okutuuka ku complex pulse sequence output awatali external triggering okutuukiriza ebyetaago eby'enjawulo eby'okulongoosa ebintu.