457nm mana kiʻekiʻe hoʻokahi alapine (frequency) kukuna polū

457nm mana kiʻekiʻe hoʻokahi alapine (frequency)laser polū
Hoʻolālā ala optical o kahi laser polū hoʻokahi-alapine kiʻekiʻe 457nm me ka alapine hoʻokahi
ʻO ke kumu pamu i hoʻohana ʻia he 30 W fiber-coupled laser diode array. ʻO ka lua, ua koho ʻia kahi resonator apo no ke koho ʻana i ke ʻano. Hoʻopili ʻia ka ʻaoʻao hope me kahi kristal yttrium vanadate (Nd:YVO4) Nd3+-doped 5 mm ka lōʻihi me kahi ʻano o 0.1%. A laila, ma o kahi lua kristal lithium triborate (LBO) i hoʻohālikelike ʻia me ka pae I, ua hoʻokumu ʻia ka harmonic ʻelua e hoʻokō i ka 457nm mana kiʻekiʻe hoʻokahi alapine (frequency).laserpuka. Ke 30 W ka mana o ka pamu, ʻo ka mana puka o ka laser alapine hoʻokahi 457nm he 5.43 W, ʻo ka nalu waena he 457.06 nm, ʻo ka pono o ka hoʻololi ʻana i ka mālamalama-i-ka-mālamalama he 18.1%, a ʻo ke kūpaʻa o ka mana i loko o 1 hola he 0.464%. Hana ka laser 457nm ma ke ʻano kumu i loko o ka resonator. ʻO nā mea hoʻohālikelike maikaʻi o ke kukuna ma nā kuhikuhi x a me y he 1.04 a me 1.07, a ʻo ka ellipticity o ke kiko kukui he 97%.

Ka wehewehe ʻana o ke ala optical o ke kukui polū mana kiʻekiʻelaser alapine hoʻokahi
Hoʻohana ke kumu pamu i kahi optical fiber-coupleddiode laser semiconductorhoʻonohonoho me kahi nalu waena o 808 nm, kahi mana hoʻopuka mau o 30 W, a me ke anawaena o ke kumu fiber o 400 μm, me kahi puka helu o 0.22.
Hoʻopili ʻia ke kukui pamu a hoʻokūkala ʻia e nā aniani plano-convex ʻelua me ka lōʻihi o ke kikowaena o 20 mm a laila hoʻopili ʻia ma kaaniani laserʻO ke aniani laser he aniani Nd:YVO4 3 mm × 3 mm × 5 mm me kahi hoʻohuihui doping o 0.1%, me nā kiʻiʻoniʻoni anti-reflection 808 nm a me 914 nm i waiho ʻia ma nā wēlau ʻelua, a ua wahī ʻia ke aniani me ka pepa indium a waiho ʻia i loko o kahi mea hoʻopaʻa keleawe. Hoʻomalu pololei ʻia ka mea hoʻopaʻa keleawe e kahi mea hoʻoluʻu semiconductor a hoʻonohonoho ʻia ma 15 ℃.
He lua apo aniani ʻehā ka mea hoʻonā i haku ʻia me M1, M2, M3, a me M4.
He aniani mokulele ʻo M1 me nā kiʻiʻoniʻoni anti-reflection 808 nm, 1064 nm, a me 1342 nm (R<0.05%), a me kahi kiʻiʻoniʻoni reflection holoʻokoʻa 914 nm (R>99.8%); He aniani puka mokulele ʻo M4 me ka kiʻiʻoniʻoni reflection holoʻokoʻa 914 nm (R>99.8%), 457 nm a me 1064 nm, 1342 nm anti-reflection films (R<0.02%); He mau aniani plano-concave ʻo M2 a me M3 me ka radius curvature o r = 100 mm, me nā kiʻiʻoniʻoni anti-reflection 1064 nm a me 1342 nm (R<0.05%) ma ka mokulele a me nā kiʻiʻoniʻoni reflection holoʻokoʻa 914 nm a me 457 nm (R>99.8%) ma ka ʻili concave.
ʻO ka papa hapalua nalu a me ke aniani TGG i kau ʻia i loko o ke kahua magnetic he 914 nm nā kiʻiʻoniʻoni anti-reflection (R<0.02%). Ma ka hoʻokomo ʻana i kahi mea hana optical unidirectional i haku ʻia me TGG a me ka papa hapalua nalu, ua koi ʻia ka laser e holo unidirectional i loko o ka resonator apo, no laila e hōʻoiaʻiʻo ana e hana paʻa ana ka laser ma ke ʻano alapine hoʻokahi. ʻO FP kahi ʻāpana maʻamau me ka mānoanoa o 2 mm, me ka reflectivity i uhi ʻia i ʻelua ʻaoʻao o 50%, a hana ia i ka narrowing lua o ka hana alapine hoʻokahi o ka laser i loko o ka lua. Ua koho ʻia ke aniani LBO ma ke ʻano he aniani pālua alapine, me ka nui o 3 mm × 3 mm × 15 mm, a ua uhi ʻia me nā kiʻiʻoniʻoni anti-reflection 914 nm a me 457 nm (R<0.02%), me ka hoʻohālikelike ʻana o ka pae I-type, ke kihi ʻoki θ = 90°, φ = 21.9°.