Breakthrough! Simba repamusoro-soro pasi rose 3 μm yepakati-infraredfemtosecond fiber laser
Fiber laserkuti uwane yepakati-infrared laser kubuda, danho rekutanga nderekusarudza yakakodzera fiber matrix zvinhu. Mupedyo-infrared fiber lasers, quartz girazi matrix ndiyo yakajairika fiber matrix zvinhu ine yakaderera kutapurirana kurasikirwa, yakavimbika mechani simba uye kugadzikana kwakanyanya. Nekudaro, nekuda kweiyo yakakwira phonon simba (1150 cm-1), quartz fiber haigone kushandiswa kwepakati-infrared laser transmission. Kuti tiwane yakaderera kurasikirwa kutapurirana kwepakati-infrared laser, isu tinofanirwa kusarudza zvakare zvimwe zvefiber matrix zvinhu zvine yakaderera phonon simba, senge sulfide girazi matrix kana fluoride girazi matrix. Sulfide faibha ine yakaderera phonon simba (inenge 350 cm-1), asi ine dambudziko rekuti doping concentration haigone kuwedzerwa, saka haina kukodzera kushandiswa sefiber yekuwana kugadzira mid-infrared laser. Kunyangwe iyo fluoride girazi substrate ine yakakwira zvishoma phonon simba (550 cm-1) pane iyo sulfide girazi substrate, inogona zvakare kuwana yakaderera-kurasikirwa kutapurirana kwepakati-infrared lasers ine wavelengths isingasviki 4 μm. Zvinotonyanya kukosha, iyo fluoride girazi substrate inogona kuwana yakakwira isingawanzo pasi ion doping concentration, iyo inogona kupa iyo inowanikwa inodiwa yepakati-infrared laser chizvarwa, semuenzaniso, yakanyanya kukura fluoride ZBLAN fiber yeEr3+ yakakwanisa kuwana doping concentration ye kusvika ku10 mol. Naizvozvo, fluoride girazi matrix ndiyo yakanyanya kukodzera fiber matrix zvinhu zvepakati-infrared fiber lasers.
Munguva pfupi yapfuura, timu yaProfessor Ruan Shuangchen naProfessor Guo Chunyu paShenzhen University vakagadzira high-power femtosecond.pulse fiber laserinoumbwa ne2.8μm mode-locked Er: ZBLAN fiber oscillator, single-mode Er: ZBLAN fiber preamplifier uye yakakura-mode munda Er: ZBLAN fiber main amplifier.
Zvichienderana neiyo yekuzvimanikidza uye yekusimudzira dzidziso yepakati-infrared Ultra-pfupi pulse inodzorwa nepolarization nyika uye nhamba yekunyepedzera basa reboka redu rekutsvagisa, rakasanganiswa neasina mutsara kudzvinyirira uye maitiro ekudzora maitiro ehombe-mode optical fiber, inoshanda kutonhora tekinoroji uye amplification. chimiro chepombi inopera kaviri, sisitimu yacho inowana 2.8μm ultra-short pulse kubuda neavhareji simba re8.12W uye pulse yakafara ye148 fs. Chinyorwa chepasi rose chesimba repamusoro-soro reavhareji rakawanwa neiri boka retsvakurudzo rakazorodzwazve.
Mufananidzo 1 Chimiro dhayagiramu yeEr: ZBLAN fiber laser yakavakirwa paMOPA chimiro
Chimiro chefemtosecond lasersystem inoratidzwa muMufananidzo 1. Iyo imwe-mode-double-clad Er: ZBLAN fiber ye 3.1 m kureba yakashandiswa sefiber yekuwana mu preamplifier ine doping concentration ye7 mol.% uye core diameter ye15 μm (NA = 0.12). Mune main amplifier, kaviri yakapfeka yakakura mode field Er: ZBLAN fiber ine kureba kwema 4 m yakashandiswa sefiber yekuwana ine doping concentration ye6 mol.% uye core diameter ye30 μm (NA = 0.12). Iyo yakakura yepakati dhayamita inoita kuti iyo fibre iwane yakaderera isina mutsara coefficient uye inogona kumira yakakwirira yepamusoro peak simba uye pulse kubuda kweakakura pulse simba. Magumo ese ari maviri ekuwana fiber akasanganiswa kune iyo AlF3 terminal cap.
Nguva yekutumira: Feb-19-2024