Kev tawg! Lub ntiaj teb lub zog siab tshaj plaws 3 μm nruab nrab-infrared femtosecond fiber ntau laser

Kev tawg! Lub ntiaj teb lub zog siab tshaj plaws 3 μm nruab nrab-infraredfemtosecond fiber ntau laser

Fiber laser npavkom ua tiav nruab nrab-infrared laser tso zis, thawj kauj ruam yog xaiv cov khoom siv fiber ntau tsim nyog. Nyob rau hauv ze-infrared fiber ntau lasers, quartz iav matrix yog cov khoom siv fiber ntau matrix uas tsis tshua muaj kev sib kis, txhim khu kev qha txhua yam muaj zog thiab ruaj khov zoo heev. Txawm li cas los xij, vim tias lub zog phonon siab (1150 cm-1), quartz fiber tsis tuaj yeem siv rau nruab nrab-infrared laser kis tau tus mob. Yuav kom ua tiav qhov tsis tshua muaj kev sib kis ntawm nruab nrab-infrared laser, peb yuav tsum rov xaiv lwm cov ntaub ntawv fiber ntau nrog qis zog phonon, xws li sulfide iav matrix lossis fluoride iav matrix. Sulfide fiber ntau muaj lub zog phonon qis tshaj plaws (kwv yees li 350 cm-1), tab sis nws muaj qhov teeb meem uas cov doping concentration tsis tuaj yeem nce ntxiv, yog li nws tsis tsim nyog siv los ua cov fiber ntau los tsim cov mid-infrared laser. Txawm hais tias fluoride iav substrate muaj lub zog phonon me ntsis siab dua (550 cm-1) dua li cov iav sulfide, nws tuaj yeem ua tiav qhov kev sib kis qis rau nruab nrab-infrared lasers nrog wavelengths tsawg dua 4 μm. Qhov tseem ceeb tshaj, cov fluoride iav substrate tuaj yeem ua tiav lub ntiaj teb tsis tshua muaj ion doping concentration, uas tuaj yeem muab qhov nce ntxiv rau qhov nruab nrab-infrared laser tiam, piv txwv li, cov fluoride tshaj plaws ZBLAN fiber ntau rau Er3+ tau ua tiav cov doping concentration ntawm mus 10 mol. Yog li ntawd, fluoride iav matrix yog cov khoom siv fiber ntau haum rau nruab nrab-infrared fiber ntau lasers.

Tsis ntev los no, pab neeg ntawm xibfwb Ruan Shuangchen thiab xibfwb Guo Chunyu ntawm Shenzhen University tau tsim lub zog femtosecond.pulse fiber ntau lasermuaj li ntawm 2.8μm hom-xauv Er: ZBLAN fiber ntau oscillator, ib hom Er: ZBLAN fiber ntau preamplifier thiab loj-hom teb Er: ZBLAN fiber ntau amplifier.
Raws li tus kheej-compression thiab amplification txoj kev xav ntawm nruab nrab-infrared ultra-luv mem tes tswj los ntawm lub xeev polarization thiab cov lej simulation ua haujlwm ntawm peb pawg tshawb fawb, ua ke nrog cov kev txwv tsis pub tawm thiab hom kev tswj ntawm hom loj-hom optical fiber, active txias tshuab thiab amplification. qauv ntawm ob-kawg twj tso kua mis, lub kaw lus tau txais 2.8μm ultra-luv mem tes tso zis nrog lub zog nruab nrab ntawm 8.12W thiab mem tes dav ntawm 148 fs. Cov ntaub ntawv thoob ntiaj teb ntawm lub zog nruab nrab siab tshaj plaws ua tiav los ntawm pab pawg tshawb fawb no tau rov ua dua tshiab ntxiv.

Daim duab 1 Daim duab kos duab ntawm Er: ZBLAN fiber ntau laser raws li MOPA qauv
Cov qauv ntawm covfemtosecond laserLub kaw lus tau qhia hauv daim duab 1. Ib hom ob-clad Er: ZBLAN fiber ntau ntawm 3.1 m ntev tau siv los ua qhov nce fiber ntau hauv lub preamplifier nrog doping concentration ntawm 7 mol.% thiab ib txoj kab uas hla ntawm 15 μm (NA = 0.12). Nyob rau hauv lub ntsiab amplifier, ob chav clad loj hom teb Er: ZBLAN fiber nrog ib tug ntev ntawm 4 m tau siv raws li qhov nce fiber ntau nrog ib tug doping concentration ntawm 6 mol.% thiab ib tug tub ntxhais txoj kab uas hla ntawm 30 μm (NA = 0.12). Cov tub ntxhais txoj kab uas hla loj dua ua rau qhov nce fiber ntau muaj qis dua nonlinear coefficient thiab tuaj yeem tiv taus siab dua lub zog siab thiab cov zis tawm ntawm lub zog pulse loj. Ob qhov kawg ntawm qhov nce fiber ntau yog fused rau AlF3 davhlau ya nyob twg cap.