Intambwe! Imbaraga zisumba izindi kwisi 3 μm hagati ya infragre femtosekond fibre laser

Intambwe! Imbaraga zisumba izindi kwisi 3 μm hagati ya infragrefemtosekond fibre laser

Lazerikugirango ugere hagati ya infrarafarike ya laser isohoka, intambwe yambere ni uguhitamo fibre matrix ikwiye. Muri hafi ya infragre fibre fibre, matrike ya quartz yikirahure nikintu gikunze kugaragara cyane matrike ya fibre matrike hamwe no gutakaza imbaraga nke cyane, imbaraga za mashini zizewe kandi zihamye. Nyamara, kubera ingufu za fononi nyinshi (1150 cm-1), fibre ya quartz ntishobora gukoreshwa mugukwirakwiza laser yo hagati. Kugirango tugere ku gihombo gike cyo gukwirakwiza lazeri yo hagati, dukeneye kongera guhitamo ibindi bikoresho bya fibre matrike hamwe ningufu za fononi yo hasi, nka matrix ya sulfide cyangwa materix ya fluoride. Fibre ya sulfide ifite ingufu za fonone nkeya (hafi cm 350-1), ariko ifite ikibazo cyuko doping yibanze idashobora kwiyongera, ntabwo rero ikwiriye gukoreshwa nka fibre yunguka kugirango ikore laser yo hagati. Nubwo ikirahuri cya fluoride gifite ingufu za fonone zisumba gato (550 cm-1) ugereranije na sulfide yikirahure ya sulfide, irashobora kandi kugera kubitakaza igihombo gito kuri lazeri yo hagati ya infrarafaride ifite uburebure buri munsi ya 4 mm. Icy'ingenzi cyane, ikirahuri cya fluor kirashobora kugera ku butumburuke bukabije bw’isi ion doping, bushobora gutanga inyungu zisabwa mu gisekuru cyo hagati ya lazeri yo hagati, urugero, floride ikuze cyane ZBLAN fibre ya Er3 + yashoboye kugera kuri doping yibanze kuri gushika kuri 10 mol. Kubwibyo, fluoride ikirahuri matrix nicyo kintu cyiza cya fibre matrike yo hagati ya fibre yo hagati.

Vuba aha, itsinda rya Porofeseri Ruan Shuangchen na Porofeseri Guo Chunyu muri kaminuza ya Shenzhen ryateje imbere femtosekond ifite ingufu nyinshipulse fibre laserigizwe na 2.8 mm yuburyo bwafunzwe Er: ZBLAN fibre oscillator, uburyo bumwe Er: ZBLAN fibre preamplifier hamwe numwanya munini wuburyo Er: ZBLAN fibre nyamukuru amplifier.
Dushingiye ku kwikuramo no kwongera imbaraga za mid-infragre ultra-short pulse igenzurwa na leta ya polarisiyasi hamwe numurimo wo kwigana numubare witsinda ryacu ryubushakashatsi, rifatanije no guhagarika umurongo hamwe nuburyo bwo kugenzura uburyo bwa fibre nini ya optique, tekinoroji yo gukonjesha no kongera imbaraga imiterere ya pompe ebyiri zirangiye, sisitemu ibona 2.8μm ultra-short pulse isohoka hamwe nimpuzandengo ya 8.12W nubugari bwa pulse ya 148 fs. Amateka mpuzamahanga yingufu zisumba izindi zose zagezweho niri tsinda ryubushakashatsi yarushijeho gushya.

Igishushanyo 1 Igishushanyo mbonera cya Er: ZBLAN fibre laser ishingiye kumiterere ya MOPA
Imiterere yafemtosekond laserSisitemu irerekanwa mu gishushanyo cya 1. Ubwoko bumwe-bubiri bwambaye Er: ZBLAN fibre ya metero 3.1 z'uburebure yakoreshejwe nka fibre yunguka muri preamplifier hamwe na doping yibanze ya 7 mol.% na diameter yibanze ya 15 mm (NA = 0.12). Muri amplifier nyamukuru, ikubye kabiri yuburyo bunini umurima Er: fibre ya ZBLAN ifite uburebure bwa m 4 yakoreshejwe nka fibre yunguka hamwe na doping yibanda kuri mol 6% na diameter yibanze ya 30 mm (NA = 0.12). Ingano nini ya diametre ituma inyungu fibre ifite coefficient yo hasi idafite umurongo kandi irashobora kwihanganira imbaraga zo hejuru nimpanuka ziva mumbaraga nini nini. Impera zombi zunguka fibre zahujwe kumutwe wa AlF3.