Kev Tshwm Sim Tshiab! Lub laser fiber femtosecond mid-infrared 3 μm muaj zog tshaj plaws hauv ntiaj teb

Kev Tshwm Sim Tshiab! Lub zog siab tshaj plaws hauv ntiaj teb 3 μm nruab nrab infraredfemtosecond fiber laser

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

Tsis ntev los no, pab pawg ntawm Xibfwb Ruan Shuangchen thiab Xibfwb Guo Chunyu ntawm Shenzhen University tau tsim lub zog siab femtosecondlub zog fais fab lasermuaj 2.8μm hom-xauv Er:ZBLAN fiber oscillator, ib hom Er:ZBLAN fiber preamplifier thiab hom loj teb Er:ZBLAN fiber tseem ceeb amplifier.
Raws li kev tshawb fawb txog kev sib txuas lus ntawm lub zog ultra-short uas tswj los ntawm lub xeev polarization thiab kev ua haujlwm ntawm peb pawg tshawb fawb, ua ke nrog kev tswj hwm nonlinear thiab hom kev tswj hwm ntawm cov fiber ntau hom optical, kev siv tshuab txias thiab cov qauv amplification ntawm ob lub twj tso kua mis, lub kaw lus tau txais 2.8μm ultra-short pulse output nrog lub zog nruab nrab ntawm 8.12W thiab lub zog dav ntawm 148 fs. Cov ntaub ntawv thoob ntiaj teb ntawm lub zog nruab nrab siab tshaj plaws uas tau ua tiav los ntawm pawg tshawb fawb no tau hloov kho dua tshiab.

Daim Duab 1 Daim duab qhia txog Er:ZBLAN fiber laser raws li MOPA qauv
Cov qauv ntawm lubfemtosecond laserLub kaw lus tau qhia nyob rau hauv Daim Duab 1. Lub fiber ib hom ob-clad Er:ZBLAN ntawm 3.1 m ntev tau siv ua lub fiber nce hauv lub preamplifier nrog lub doping concentration ntawm 7 mol.% thiab lub hauv paus txoj kab uas hla ntawm 15 μm (NA = 0.12). Hauv lub amplifier tseem ceeb, lub fiber ob clad loj hom teb Er:ZBLAN nrog lub sijhawm ntev ntawm 4 m tau siv ua lub fiber nce nrog lub doping concentration ntawm 6 mol.% thiab lub hauv paus txoj kab uas hla ntawm 30 μm (NA = 0.12). Lub hauv paus txoj kab uas hla loj dua ua rau lub fiber nce muaj cov coefficient nonlinear qis dua thiab tuaj yeem tiv taus lub zog siab dua thiab cov zis pulse ntawm lub zog pulse loj dua. Ob qho kawg ntawm lub fiber nce tau fused rau AlF3 lub hau davhlau ya nyob twg.