Ma ʻaneʻi, ua noiʻi ʻia ka hopena o ka attenuation a me ka hoʻonui ʻana i ka hana laser o Nd:YAG transparent ceramics.Me ka 0.6 at.% Nd:YAG koʻokoʻo seramika me 3 mm anawaena a me 65 mm lōʻihi, kaʻO ka helu hoʻopuehu a me ka helu absorption ma 1064 nm ua ana ʻia he 0.0001 cm-1 a me 0.0017 cm-1.No ka hoʻokolohua laser 808 nm ʻaoʻao-pumped, ua loaʻa ka mana hoʻopuka awelika o 44.9 W me ka hoʻololi hoʻololi optical-to-optical o 26.4%, a ua aneane like me ka 1 at.% hoʻokahi aniani.ʻO ka hoʻohana ʻana i ka 885 nm direct end-pumped scheme, ua hōʻike ʻia nā hoʻokolohua laser ma hope nei i ke kiʻekiʻe o ka optical efficiency o 62.5% a me ka mana kiʻekiʻe loa o 144.8 W i loaʻa i ka mana pahū o 231.5 W. i Nd: YAG ceramic laser i ko mākou ʻike.Hōʻike ia e hiki ke hana ʻia ka mana kiʻekiʻe a me ka mana kiʻekiʻe o ka laser e ka kiʻekiʻe optical quality Nd:YAG ceramic rod me ka 885 nm direct pumping technology.
Hōʻike kēia pepa i ka ikehu pulse kiʻekiʻe, ka laula laina haiki, ka laser mid-infrared (MIR) ma 6.45 µm, ma muli o kahi BaGa4Se7 (BGSe) crystal optical parametric oscillator (OPO) i puhi ʻia e 1.064 µm laser.ʻO ka ikehu pulse kiʻekiʻe ma 6.45 µm a hiki i ka 1.23 mJ, me ka laula pulse o 24.3 ns a me ka helu hou ʻana o 10 Hz, e pili ana i ka hoʻololi ʻana o ka optical-optical o 2.1%, mai ka kukui pump 1.064 µm a i ka māmā palaualelo 6.45 µm.ʻO ka laina laina māmā palaualelo ma kahi o 6.8 nm. ʻOiai, ua helu pololei mākou i ke kūlana OPO phase-matching condition ma BGSe crystal i puhi ʻia e ka laser 1.064 µm, a ua hana ʻia kahi ʻōnaehana hoʻohālikelike helu no ka nānā ʻana i nā hiʻohiʻona komo-output ma 6.45 µm, a me ka hopena o ka lōʻihi aniani i ka pono hoʻololi.Loaʻa ka ʻaelike maikaʻi ma waena o ke ana a me ka hoʻohālikelike.I ka maikaʻi o ko mākou ʻike, ʻo ia ka ikehu pulse kiʻekiʻe loa ma 6.45 µm, me ka laina laina haiki loa no kēlā me kēia laser MIR ns paʻa paʻa āpau ma BGSe-OPO i puhi ʻia e ka 1.064 µm oscillator maʻalahi.ʻO kēia ʻōnaehana 6.45 µm OPO maʻalahi a paʻa, me ka ikaika pulse kiʻekiʻe a me ka laina laina haiki, hiki ke hoʻokō i nā koi no ka ʻoki ʻana i ka ʻiʻo a hoʻomaikaʻi i ka pololei ablation kiko.
Ma kēia pepa, hōʻike mākou i kahi langasite (LGS) electro-optic Ho: YAG cavity-dumped laser e kāohi ana i ka loaʻa ʻana o ka hilinaʻi o ka lōʻihi o ka pulse i nā lasers Q-switched.Ua loaʻa ka lōʻihi o ka pulse mau o 7.2 ns ma ka helu hou ʻana o 100 kHz.ʻO ka pōmaikaʻi mai ke aniani LGS ʻaʻohe hopena koʻikoʻi reverse piezoelectric apo a me ka thermally induced depolarization, ua hoʻokō ʻia kahi kaʻaahi pulse paʻa ma ka mana puka o 43 W. IR) ZnGeP2 (ZGP) optical parametric oscillator (OPO) ua hoʻokō ʻia, e hāʻawi ana i kahi ala hilinaʻi e hoʻokō ai i nā helu repetition kiʻekiʻe a me nā manawa pulse nanosecond pōkole no nā OPO ZGP waena-infrared kiʻekiʻe.ʻO 15 W ka mana hoʻopuka maʻamau, e like me ka lōʻihi o ka pulse o 4.9 ns a me ka helu hoʻopiʻi o 100 kHz.
Hōʻike mākou no ka manawa mua i ka hanauna o ka octave-spanning mid-infrared me ka BGSe nonlinear crystal.Hoʻohana ʻia kahi ʻōnaehana laser Cr:ZnS e hāʻawi ana i nā pulses 28-fs ma kahi hawewe waena o 2.4 µm ma ke ʻano he kumu puna, e hoʻokau i ka hana ʻokoʻa intra-pulse i loko o ke aniani BGSe.Ma muli o ka hopena, ua loaʻa mai kahi hui ākea waena waena-infrared continuum mai 6 a 18 µm.Hōʻike ia he mea hoʻohiki ʻo BGSe crystal no ka broadband, liʻiliʻi-cycle mid-infrared generation ma o ka hoʻololi pinepine ʻana me nā kumu puna femtosecond.
ʻO 1.53 W nā mea paʻa paʻa holoʻokoʻa nanosecond pulse i waena o ka infrared laser ma 6.45 µm
