Paʻa! ʻO ka mana kiʻekiʻe loa o ka honua 3 μm mid-infrared femtosecond fiber laser

Paʻa! ʻO ka mana kiʻekiʻe loa o ka honua 3 μm mid-infraredlaser fiber femtosecond

Laser fiberno ka hoʻokō ʻana i ka hopena laser infrared mid-infrared, ʻo ka hana mua ke koho i ka mea pono fiber matrix. Ma kahi kokoke-infrared fiber lasers, quartz glass matrix ka mea maʻamau maʻamau fiber matrix me ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa, ka ikaika mechanical hilinaʻi a me ke kūpaʻa maikaʻi loa. Eia nō naʻe, ma muli o ke kiʻekiʻe o ka ikehu phonon (1150 cm-1), ʻaʻole hiki ke hoʻohana ʻia ka fiber quartz no ka hoʻoili laser mid-infrared. I mea e hoʻokō ai i ka hoʻoili haʻahaʻa haʻahaʻa o ka laser infrared mid-infrared, pono mākou e koho hou i nā mea fiber matrix me ka ikehu phonon haʻahaʻa, e like me ka sulfide aniani matrix a i ʻole fluoride aniani matrix. Loaʻa i ka fiber Sulfide ka ikehu phonon haʻahaʻa loa (e pili ana i 350 cm-1), akā aia ka pilikia ʻaʻole hiki ke hoʻonui ʻia ka neʻe ʻana o ka doping, no laila ʻaʻole kūpono ia no ka hoʻohana ʻana ma ke ʻano he fiber loaʻa e hoʻohua i ka laser mid-infrared. ʻOiai ʻoi aku ka ʻoi aku o ka ikehu phonon o ka ipu aniani fluoride (550 knm-1) ma mua o ka substrate aniani sulfide, hiki iā ia ke hoʻokō i ka hoʻoili haʻahaʻa haʻahaʻa no nā lasers waena-infrared me nā lōʻihi haʻahaʻa ma lalo o 4 μm. ʻO ka mea nui loa, hiki i ka fluoride aniani substrate ke hoʻokō i kahi kiʻekiʻe kiʻekiʻe o ka honua ion doping concentration, hiki iā ia ke hāʻawi i ka loaʻa i koi ʻia no ka hanauna laser mid-infrared, no ka laʻana, ʻo ka fluoride ZBLAN fiber ʻoi loa no Er3 + ua hiki ke hoʻokō i ka ʻike doping o a hiki i 10 mol. No laila, ʻo ka fluoride aniani matrix ka mea kūpono loa i ka fiber matrix material no ka waena-infrared fiber lasers.

I kēia mau lā, ua hoʻokumu ka hui o Polofesa Ruan Shuangchen a me Kumu Guo Chunyu ma ke Kulanui o Shenzhen i kahi femtosecond mana kiʻekiʻe.puluniu puluniu laseri haku ʻia me 2.8μm mode-locked Er: ZBLAN fiber oscillator, single-mode Er: ZBLAN fiber preamplifier a me ka nui-mode field Er: ZBLAN fiber main amplifier.
Ma muli o ka manaʻo hoʻopaʻa pono a me ka hoʻonui ʻana o ka pulse ultra-short mid-infrared i hoʻomalu ʻia e ka mokuʻāina polarization a me ka hana simulation helu o kā mākou hui noiʻi, i hui pū ʻia me ka nonlinear suppression a me nā ʻano mana o ka fiber optical mode nui, ʻenehana hoʻoluʻu ikaika a me ka hoʻonui. ʻO ka hoʻolālā o ka paila pālua, loaʻa i ka ʻōnaehana ka 2.8μm ultra-short pulse output me ka mana awelika o 8.12W a me ka laulā pulse o 148 fs. Ua hōʻano hou ʻia ka moʻolelo honua o ka mana awelika kiʻekiʻe loa i loaʻa e kēia hui noiʻi.

Kiʻi 1 Ke kiʻina hana o Er: ZBLAN fiber laser e pili ana i ka hoʻolālā MOPA
ʻO ke ʻano o kalaser femtosecondHōʻike ʻia ka ʻōnaehana ma ke Kiʻi 1. Ua hoʻohana ʻia ʻo Er: ZBLAN fiber o 3.1 m ka lōʻihi e like me ka loaʻa ʻana o ka fiber i ka preamplifier me kahi ʻano doping o 7 mol.% a me ke anawaena kumu o 15 μm (NA = 0.12). I loko o ka mea hoʻonui nui, ua hoʻohana ʻia kahi pānaʻi pālua ʻelua ʻano nui Er: ZBLAN fiber me ka lōʻihi o 4 m i hoʻohana ʻia e like me ka loaʻa ʻana o ka fiber me ka doping o 6 mol.% a me ke anawaena kumu o 30 μm (NA = 0.12). ʻO ke anawaena koʻikoʻi nui ka mea i loaʻa i ka fiber loaʻa ke koena nonlinear haʻahaʻa a hiki ke kū i ka mana kiʻekiʻe a me ka puka pulse o ka ikehu pulse nui aʻe. Hoʻopili ʻia nā ʻaoʻao ʻelua o ka fiber gain i ka pāpale terminal AlF3.