He laser wikiwiki loa ka nui o ka piko o ka manamana lima

He hana kiʻekiʻelaser wikiwiki loaka nui o ka piko o ka manamana lima

Wahi a kahi ʻatikala uhi hou i paʻi ʻia ma ka puke pai ʻo Science, ua hōʻike nā mea noiʻi ma ke Kulanui o ke kūlanakauhale ʻo New York i kahi ala hou e hana ai i ka hana kiʻekiʻenā lasers wikiwiki loama nā nanophotonics. ʻO kēia mode-locked miniaturizedlaserhoʻopuka i kahi moʻo o nā pulse coherent ultra-short o ke kukui ma nā manawa femtosecond (trillionths o ke kekona).

Laka ʻia ke ʻano wikiwiki loanā lasershiki ke kōkua i ka wehe ʻana i nā mea huna o nā manawa wikiwiki loa o ke kūlohelohe, e like me ke kūkulu ʻia ʻana a i ʻole ka uhaki ʻana o nā pilina molekala i ka wā o nā hopena kemika, a i ʻole ka hoʻolaha ʻana o ka mālamalama i nā pāpāho turbulent. ʻO ka wikiwiki kiʻekiʻe, ka ikaika pulse kiʻekiʻe, a me ka uhi ākea o nā lasers mode-locked e hiki ai i nā ʻenehana photon he nui, me nā uaki atomic optical, ke kiʻi biological, a me nā kamepiula e hoʻohana ana i ka mālamalama e helu a hana i ka ʻikepili.

Akā, ʻo nā lasers mode-locked holomua loa he pipiʻi loa nō naʻe, nā ʻōnaehana pākaukau e koi ana i ka mana i kaupalena ʻia i ka hoʻohana ʻana i ka hale hana. ʻO ka pahuhopu o ka noiʻi hou, ʻo ia ka hoʻolilo ʻana i kēia i ʻōnaehana nui o ka chip i hiki ke hana nui ʻia a hoʻolaha ʻia ma ke kahua. Ua hoʻohana nā mea noiʻi i kahi kahua mea e kū mai ana i ka lithium niobate (TFLN) lahilahi e hoʻoponopono pono a hoʻomalu pololei i nā pulse laser ma ka hoʻopili ʻana i nā hōʻailona uila alapine lekiō waho iā ia. Ua hoʻohui ka hui i ka loaʻa laser kiʻekiʻe o nā semiconductors papa III-V me nā hiki ke hoʻopili pulse kūpono o nā waveguides photonic nanoscale TFLN e hoʻomohala i kahi laser e hoʻopuka ana i kahi mana kiʻekiʻe o 0.5 watts.

Ma waho aʻe o kona nui liʻiliʻi, ʻo ia ka nui o ka manamana lima, hōʻike pū ka laser mode-locked i hōʻike hou ʻia i kekahi mau waiwai i hiki ʻole i nā lasers kuʻuna ke hoʻokō, e like me ka hiki ke hoʻonohonoho pono i ka helu hana hou o ka pulse output ma luna o kahi ākea o 200 megahertz ma ka hoʻoponopono wale ʻana i ke au pump. Manaʻolana ka hui e hoʻokō i kahi kumu comb chip-scale, frequency-stable ma o ka hoʻonohonoho hou ʻana o ka laser, he mea koʻikoʻi no ka ʻike pololei. ʻO nā noi kūpono e pili ana i ka hoʻohana ʻana i nā kelepona paʻalima e ʻike i nā maʻi maka, a i ʻole e kālailai iā E. coli a me nā virus weliweli i ka meaʻai a me ke kaiapuni, a e hiki ai ke hoʻokele i ka wā i hōʻino ʻia ai ʻole loaʻa ʻole ka GPS.