He aha ka ʻenehana optical phased array?

Ma ka hoʻomalu ʻana i ke ʻano o ke kukuna ʻāpana i loko o ka ʻāpana kukuna, hiki i ka ʻenehana ʻāpana ʻāpana optical ke hoʻokō i ke kūkulu hou ʻana a i ʻole ka hoʻoponopono pololei ʻana o ka mokulele isopic kukuna. Loaʻa iā ia nā pono o ka liʻiliʻi o ka nui a me ke kaumaha o ka ʻōnaehana, ka wikiwiki o ka pane ʻana a me ka maikaʻi o ke kukuna.

ʻO ke kumumanaʻo hana o ka ʻenehana optical phased array ʻo ia ka hoʻololi pono ʻana (a i ʻole ka hoʻopaneʻe ʻana) i ka hōʻailona o ka mea kumu i hoʻonohonoho ʻia e like me kekahi kānāwai e loaʻa ai ka deflection o ke kukuna array. Wahi a ka wehewehe ʻana ma luna, ʻo ka ʻenehana optical phased array e komo pū ana me ka ʻenehana deflection kukuna kihi nui no nā beam emission arrays a me ka ʻenehana kiʻi interference telescope array no ke kiʻi kiʻekiʻe o nā pahuhopu mamao.

Mai ka manaʻo o ka hoʻokuʻu ʻana, ʻo ka optical phased array ke kaohi i ke kahua o ka array i hoʻouna ʻia ke kukuna, i mea e ʻike ai i ka deflection holoʻokoʻa o ke kukuna array a i ʻole ka uku hewa phase. Ua hōʻike ʻia ke kumu kumu o ka optical phased array ma ke Kiʻi 1. ʻO ke Kiʻi 1 (a) he incoherent synthetic array, ʻo ia hoʻi, aia wale nō ka "array" me ka ʻole o ka "phased array". Hōʻike ke Kiʻi 1 (b) ~ (d) i ʻekolu mau kūlana hana like ʻole o ka optical phased array (ʻo ia hoʻi, ka coherent synthetic array).

Hoʻokō wale ka ʻōnaehana synthesis incoherent i ka superposition mana maʻalahi o ke kukuna array me ka ʻole o ka kaohi ʻana i ke ʻano o ke kukuna array. Hiki i kona kumu kukui ke lilo i mau lasers he nui me nā nalu like ʻole, a ua hoʻoholo ʻia ka nui o ke kahua mamao e ka nui o ka ʻāpana array hoʻouna, kūʻokoʻa i ka helu o nā mea array, ka puka like o ka array a me ka ratio duty o ka beam array, no laila ʻaʻole hiki ke helu ʻia he phased array ma ke ʻano maoli. Eia nō naʻe, ua hoʻohana nui ʻia ka ʻōnaehana synthesis incoherent ma muli o kona ʻano maʻalahi, ka koi haʻahaʻa i ka hana kumu kukui a me ka mana hoʻopuka kiʻekiʻe.

Mai ka manaʻo o ka loaʻa ʻana, hoʻopili ʻia ka optical phased array i ke kiʻi kiʻekiʻe o nā pahuhopu mamao (FIG. 2). Hana ʻia ia me ka telescope array, ka phase retarder array, ka beam combinator a me ka mea hana kiʻi. Loaʻa ka coherence paʻakikī o ke kumu pahuhopu. Hoʻomaulia ʻia ke kiʻi pahuhopu e like me ka Fansert-Zernick theorem. Ua kapa ʻia kēia ʻenehana he ʻenehana kiʻi interference, ʻo ia kekahi o nā ʻenehana kiʻi aperture synthetic. Mai ka manaʻo o ke ʻano o ka ʻōnaehana, ʻo ke ʻano o ka ʻōnaehana kiʻi interferometric a me ka ʻōnaehana hoʻokuʻu phased array ua like like, akā ʻo ke kuhikuhi hoʻoili ala optical i nā noi ʻelua he ʻokoʻa.