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

Ka holomua! ʻO ka mana kiʻekiʻe loa o ka honua he 3 μm mid-infraredlaser fiber femtosecond

Laser fiberNo ka hoʻokō ʻana i ka hopena laser mid-infrared, ʻo ka hana mua ke koho i ka mea matrix fiber kūpono. I nā lasers fiber kokoke-infrared, ʻo ka matrix aniani quartz ka mea matrix fiber maʻamau me ka pohō hoʻoili haʻahaʻa loa, ka ikaika mechanical hilinaʻi a me ke kūpaʻa maikaʻi loa. Eia 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 mid-infrared, pono mākou e koho hou i nā mea matrix fiber ʻē aʻe me ka ikehu phonon haʻahaʻa, e like me ka matrix aniani sulfide a i ʻole ka matrix aniani fluoride. ʻO ka fiber sulfide ka ikehu phonon haʻahaʻa loa (ma kahi o 350 cm-1), akā he pilikia kona ʻaʻole hiki ke hoʻonui ʻia ka nui o ka doping, no laila ʻaʻole kūpono ia no ka hoʻohana ʻana ma ke ʻano he fiber loaʻa e hana i ka laser mid-infrared. ʻOiai he ʻoi aku ka kiʻekiʻe o ka ikehu phonon o ka substrate aniani fluoride (550 cm-1) ma mua o ka substrate aniani sulfide, hiki iā ia ke hoʻokō i ka hoʻoili haʻahaʻa haʻahaʻa no nā lasers mid-infrared me nā wavelengths ma lalo o 4 μm. ʻOi aku ka mea nui, hiki i ka substrate aniani fluoride ke hoʻokō i kahi kiʻekiʻe o ka doping ion honua kakaikahi, hiki ke hāʻawi i ka loaʻa e pono ai no ka hanauna laser mid-infrared, no ka laʻana, ʻo ka fiber fluoride ZBLAN makua loa no Er3+ ua hiki ke hoʻokō i kahi doping concentration a hiki i ka 10 mol. No laila, ʻo ka matrix aniani fluoride ka mea matrix fiber kūpono loa no nā lasers fiber mid-infrared.

I kēia mau lā iho nei, ua hoʻomohala ka hui o Polofesa Ruan Shuangchen lāua ʻo Polofesa Guo Chunyu ma ke Kulanui ʻo Shenzhen i kahi femtosecond mana kiʻekiʻe ...laser olonā pulsei haku ʻia me ka 2.8μm mode-locked Er:ZBLAN fiber oscillator, ka preamplifier fiber Er:ZBLAN mode hoʻokahi a me ka hoʻoikaika nui o ke kahua Er:ZBLAN fiber nui.
Ma muli o ke kumumanaʻo hoʻopili ponoʻī a me ka hoʻonui ʻana o ka pulse ultra-short mid-infrared i kāohi ʻia e ka mokuʻāina polarization a me ka hana simulation helu o kā mākou hui noiʻi, i hui pū ʻia me nā ʻano hoʻopau nonlinear a me nā ʻano hoʻomalu mode o ka fiber optical mode nui, ʻenehana hoʻoluʻu hana a me ka hoʻonohonoho hoʻonui o ka pamu ʻelua-ended, loaʻa i ka ʻōnaehana ka hopena pulse ultra-short 2.8μm 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 Kiʻikuhi hoʻonohonoho o ka laser fiber Er:ZBLAN e pili ana i ke ʻano MOPA
ʻO ke ʻano o kalaser femtosecondUa hōʻike ʻia ka ʻōnaehana ma ke Kiʻi 1. Ua hoʻohana ʻia ke kaula uila Er:ZBLAN pālua-ʻano hoʻokahi o 3.1 m ka lōʻihi ma ke ʻano he kaula uila loaʻa i loko o ka preamplifier me ka hoʻohuihui doping o 7 mol.% a me ke anawaena kumu o 15 μm (NA = 0.12). I loko o ka amplifier nui, ua hoʻohana ʻia kahi kaula uila Er:ZBLAN kahua ʻano pālua me ka lōʻihi o 4 m ma ke ʻano he kaula uila loaʻa me ka hoʻohuihui doping o 6 mol.% a me ke anawaena kumu o 30 μm (NA = 0.12). ʻO ke anawaena kumu nui aʻe e hoʻolilo i ka kaula uila loaʻa i ka coefficient nonlinear haʻahaʻa a hiki ke kū i ka mana kiʻekiʻe a me ka hoʻopuka pulse o ka ikehu pulse nui aʻe. Ua hoʻopili ʻia nā wēlau ʻelua o ke kaula uila loaʻa i ka pāpale terminal AlF3.