Ka mana a me ka ikehu o ka laser

Ka mana a me ka ikehu o ka laser

ʻO ka Density ka nui kino a mākou i kamaʻāina loa i ko mākou ola ʻana i kēlā me kēia lā, ʻo ka mānoanoa a mākou e kamaʻilio nui ai ʻo ia ka mānoanoa o ka mea, ʻo ke kumu ρ=m/v, ʻo ia hoʻi, ua like ka density me ka nui i puʻunaue ʻia e ka leo. Akā ʻokoʻa ka mana o ka mana a me ka ikehu o ka laser, ma ʻaneʻi i māhele ʻia e ka wahi ma mua o ka leo. ʻO ka mana nō hoʻi kā mākou pilina me ka nui o ke kino, no ka mea, hoʻohana mākou i ka uila i kēlā me kēia lā, e komo ka uila i ka mana, ʻo ka mana maʻamau honua ʻo W, ʻo ia hoʻi, J/s, ʻo ia ka ratio o ka ikehu a me ka manawa. ʻO J. No laila, ʻo ka mana o ka ikehu ka manaʻo o ka hoʻohui ʻana i ka mana a me ka mānoanoa, akā eia ka wahi irradiation o ke kiko ma mua o ka leo, ʻo ka mana i puʻunaue ʻia e ka wahi puka puka ka mana nui, ʻo ia hoʻi. , ʻo ka ʻāpana o ka mana mana he W/m2, a ma kakahua laser, no ka mea, li'ili'i loa ka wahi irradiation laser, no laila, ho'ohana 'ia W/cm2 ma ke 'ano he hui. Hoʻopau ʻia ka nui o ka ikehu mai ka manaʻo o ka manawa, e hui pū ana i ka ikehu a me ka nui, a ʻo ka hui ʻo J/cm2. ʻO ka maʻamau, wehewehe ʻia nā laser mau me ka hoʻohana ʻana i ka mana, ʻoiainā laser pulsedwehewehe ʻia me ka hoʻohana ʻana i ka nui o ka mana a me ka nui o ka ikehu.

I ka hana ʻana o ka laser, hoʻoholo maʻamau ka mana o ka mana i ka hiki ʻana o ka paepae no ka luku ʻana, a i ʻole ablating, a i ʻole nā ​​​​mea hana ʻē aʻe. ʻO ka paepae kahi manaʻo e ʻike pinepine ʻia i ka wā e aʻo ai i ka pilina o nā lasers me ka mea. No ke aʻo ʻana i ka pulse pōkole (hiki ke noʻonoʻo ʻia ʻo ke kahua us), ka pulse pōkole loa (hiki ke manaʻo ʻia ʻo ke kahua ns), a hiki i ka ultra-wikiwiki (ps a me fs stage) nā mea pili laser, nā mea noiʻi mua maʻamau. apono i ka manao o ka ikehu. ʻO kēia manaʻo, ma ke kiʻekiʻe o ka launa pū ʻana, e hōʻike ana i ka ikehu e hana ana ma ka pahu hopu no kēlā me kēia ʻāpana, i ka hihia o ka laser o ka pae like, ʻoi aku ka nui o kēia kūkākūkā.

Aia kekahi paepae no ka nui o ka ikehu o ka hoʻoheheʻe pulse hoʻokahi. ʻOi aku ka paʻakikī o ke aʻo ʻana i ka pilina laser-matter. Eia nō naʻe, ke hoʻololi mau nei nā mea hoʻokolohua o kēia lā, ke ʻano o ka laula pulse, ka ikehu pulse hoʻokahi, ke hoʻololi pinepine ʻana a me nā ʻāpana ʻē aʻe, a pono hoʻi e noʻonoʻo i ka hoʻopuka maoli ʻana o ka laser i ka fluctuations ikehu pulse i ka hihia o ka ikehu. e ana, hiki ke oolea loa. Ma ke ano nui, hiki ke no'ono'o 'ia ka nui o ka ikehu i puunaueia e ka laula pulse, 'o ia ka awelika o ka mana (e ho'omaopopo he manawa ia, 'a'ole ka lewa). Eia nō naʻe, ʻike maopopo ʻia ʻaʻole paha he ʻehā, hawewe square, a i ʻole bele a i ʻole Gaussian, a ua hoʻoholo ʻia kekahi e nā waiwai o ka laser ponoʻī, ʻoi aku ke ʻano.

Hāʻawi pinepine ʻia ka laulā pulse e ka hapalua o ke kiʻekiʻe i hāʻawi ʻia e ka oscilloscope (full peak half-width FWHM), kahi e helu ai mākou i ka waiwai o ka mana nui mai ka ikehu ikehu, he kiʻekiʻe. Pono e helu ʻia ka hapalua kiʻekiʻe a me ka laula e ka hui pū, ka hapalua kiʻekiʻe a me ka laula. ʻAʻohe nīnau kikoʻī inā loaʻa kahi kūlana nuance kūpono no ka ʻike. , ʻo ia ka mana awelika spatial, a laila hoʻonui ʻia i ka 2, no ka mana kiʻekiʻe spatial (ʻo ka puʻunaue spatial ʻo Gauss ka hāʻawi ʻana i kēlā ʻano lapaʻau, ʻaʻole pono ka top-hat e hana pēlā), a laila hoʻonui ʻia me kahi hōʻike māhele radial. , A ua pau ʻoe.