I loko o nā makahiki he ʻumi i hala, me ka hoʻomau mau ʻana o ka puna puna a me ka hoʻolālā laser, ua hoʻomaikaʻi nui ʻia ka ʻenehana laser fiber. Ma muli o ka doped optical fiber (YDF-Laser) hoʻohana nui ʻia i ka ʻenehana, noiʻi ʻepekema, a me nā mea ʻē aʻe ma muli o ke kiʻekiʻe o ka uila-optical hoʻololi pono, ʻoi aku ka maikaʻi o ka beam a me ka paʻa.
Fig1. ʻO ka helu ʻana o nā mea metala like ʻole
I kēia lā, ua hiki i ka mana kiʻekiʻe hoʻokahi-mode fiber lasers ke hoʻokō maʻalahi i ka KW-level optical power output, ka mea e hana ai i nā lasers i ke kahua o ka hana metala. Ma lalo o nā kūlana mana o ka māmā māmā, ma muli o ka helu absorption ʻokoʻa, ʻoi aku ka maikaʻi o ka laser fiber 1 micron e pili ana i ka fiber makua ke ʻoi aku ka maikaʻi o ka laser CO2 o 10 microns ma mua o ka mea metala. Hōʻike ka Fig 1 i ka helu absorption spectral o nā mea metala like ʻole, hiki ke ʻike ʻia ma ke kiʻi e hōʻike ana ka hapa nui o nā mea metala ma nā hiʻohiʻona absorption o ke kiko kikoʻī i ke ʻano o ka emi ʻana i ka piʻi ʻana o ka hawewe optical. ʻOi aku ka ikaika o ka mea metala ma mua o ka lōʻihi o ka hawewe puka ma kahi o 1070 nm e pili ana i ka lōʻihi hawewe o ka laser CO2 ma kahi laser CO2 ma 10.6um. ʻO ka mea nui, ʻo ka nui o ka absorption o ka hao metala ma lalo o 1070 nm ka lōʻihi o ka nalu he 6 mau manawa haʻahaʻa ma mua o nā kūlana hawewe 10.6um.
Fig 2. Hoʻopili pili o ka aluminosilicate a me ka phosphosilicate (YB) fiber ma 800-1100 nm spectrum
No ka mea, ʻo ka fiber optical i hoʻohui ʻia he ʻano absorption ikaika loa o 976 nm a me 915 nm ka lōʻihi o ka hawewe, ʻo ia mau lasers e hoʻomake nui ʻia e kahi laser semiconductor (LD) e hoʻokuʻu ana i ka lōʻihi o luna. ʻO ka Fig 2 he ʻelua mau mea kikoo doped maʻamau i nā helu absorption pili o 800 a 1100 nm spectroscopy, a aia kahi hiʻohiʻona nui absorption peak kokoke i 915 nm a me 976 nm. ʻO ka absorption rate o 976nm māmā nalu i ka aluminosilicate dumping fiber ua aneane ʻekolu manawa o ka nalu māmā o 915 nm, a ʻo ka absorption rate o ka mua i ka phosphosilicate ua aneane 5 mau manawa o ka hope. He ʻokoʻa kēlā ʻano hemahema, ʻo ia ka mea e hoʻohana ai kēlā mau lasers i ka ʻenehana pahū 976nm LD e hoʻokō i ka pono hoʻololi māmā-optical kiʻekiʻe. I ka manawa like, ʻo ka absorption kiʻekiʻe ʻo ia hoʻi ka hōʻemi pono ʻana i ka lōʻihi o ka fiber, a laila e kaupalena ana i nā hopena nonlinear pōʻino i kekahi ʻano.
Fig.3 Pipi o Photon Dinoff (PD) Nalo o nā ʻanuʻu YB Ion Energy ʻokoʻa.
I kēia manawa, pono e kū i nā pilikia photodational ka honua nui doped fiber lasers. ʻO kēia pilikia ke kumu i ka emi nui o ka mana puka o ka laser, kūpaʻa a me ke ola hana. ʻO ka pōʻeleʻele Photon Ua hōʻike pū ʻia kēia hanana i ka nui o nā lasers fiber doped ion. Manaʻo ʻia ma muli o ke kikowaena kala i hana ʻia i loko o ka matrix aniani. ʻO nā haʻawina mua i manaʻo i kahi ala hiki ke hoʻoponopono i kēia photon dacte, me ka co-doped phosphorus i loko o ka fiber, me ka hoʻohana ʻana i ka laser 405 nm, photobleaching, me ka hoʻohana ʻana i ka wela kiʻekiʻe, kahi annealing o photon decimensing o photon. . I waena o lākou, ʻoiai hiki ke hoʻopaʻa pono ʻia ka phosphorus, ua hoʻonui ʻia ka nalowale o ka hope a me ka aperture helu.
ʻO nā haʻawina mua o ka hui Koponen, ma ka photon darker, ua hōʻike ʻia ka wikiwiki o ka lawe ʻana i ka photon ma muli o ka neʻe ʻana o nā mites excitation, ʻo ia ka hoʻohuli ʻana o ka ikehu o ka ion (YB Inversion Rate). Ua ʻike lākou ua like ka nui o ka lawe ʻana i ka photon me 7 mau manawa i ka helu hoʻohuli ionic ikehu. Hāʻawi ʻia kahi pihi o nā poho photon i ka manawa ma Fig 3 ma Fig 3. He intuitive loa ka ʻikepili i ka piʻi ʻana o ka pōʻeleʻele photon me ka piʻi ʻana o ka hoʻohuli ʻana i ka ikehu.
Fig 4, YB Ion Energy Reverse Rate E like me ka Pump Power Change Curve ma lalo o 976 Nm a me 920 NM Pump Condition (E noʻonoʻo e lawa pono ka ʻikepili o ka hoʻohuli ʻana inā emi ka ʻokoʻa maʻamau ma mua o 1%)
Hoʻopili ʻia ka helu hoʻihoʻi mokuʻāina o ka ikehu i ka fiber doped e ka nui o ka fiber, ka mana o ka paila, ka manaʻo māmā, a me ka lōʻihi o ka nalu māmā. Hiki ke hoʻopaʻa nui ʻia ka lōʻihi hawewe māmā o ka pauma kūpono. ʻO ka hoʻohuli ʻana i ka ikehu-mokuʻāina i wehewehe ʻia ma ke ʻano he lākiō o ka photonic absorption me ka pauku kea hoʻokuʻu like ʻana ma kahi lōʻihi o ka hawewe māmā pama, a laila loaʻa ke kūlana ikehu o ka pulu doped ma lalo o ʻelua mau kumu kukui o 976 nm a me 920 nm. ʻOkoʻa ka helu hoʻohuli me ka hoʻololi ʻana i ka mana pamu (Fig 4). ʻOiai ʻo ka spectrum absorption i ka FIG 2 ma ka FiG 2 mua e hōʻike ana i nā hiʻohiʻona absorption o ka 976nm wavelength kukui ʻoi aku ka ikaika ma mua o nā hawewe ʻē aʻe, akā no ka nui o ke kukui hawewe 976 nm, ua loaʻa hope loa ia e ka kukui pump ma mua o ka. 920 nm. ʻO ka ikehu haʻahaʻa i ke kūlana he haʻahaʻa. ʻOiai ʻaʻole i hāʻawi pololei ka ʻikepili i ka hoʻihoʻi hou ʻana o ka mokuʻāina o ka 915 nm pump, ua hiki nō ke noʻonoʻo i ka 976nm pump light source i ʻoi aku ka ikaika anti-optical sub-profiling ma mua o ka mua.
ʻOiai ʻo ka 976nm pump method he kiʻekiʻe absorption rate a me ka hoʻololi ʻana i ka māmā, hiki iā ia ke hoʻemi pono i ka lōʻihi o ka loaʻa ʻana o ka fiber, a hiki ke hoʻemi ʻia ka hopena canache photon pōʻino, akā ʻo kona pili i ka 915 nm pump mode ma ka mālama fiber a me ka hui pū ʻana. . ʻOi aku ka paʻakikī o ka ʻenehana. Eia kekahi, he haiki loa ka spectrum absorption o ka fiber i hookomoia ma ka laula 976 nm. ʻO ka hoʻololi ʻana i ka lōʻihi o ka nalu ma muli o ka loli ʻana o ka wela o ka puna puna hiki ke hoʻoneʻe i ka mana hoʻopuka laser i paʻa ʻole, a he koi koʻikoʻi kēia ʻenehana pahū i ka ʻōnaehana hoʻokele wela o ka laser. Ma muli o kēia, he liʻiliʻi wale nā mea hana laser e like me Germany's IPG, ka United States Coherent-Rofin, a me ka US GW a me nā mea hana ʻē aʻe e hoʻohana i ka puna puna 976 nm i nā lasers ʻoihana nui.
Ka manawa hoʻouna: Iulai-27-2021