Ho:YAG — He Mea Hana Pono e Hoʻopuka i ka 2.1-μm Laser Emission
Hōʻike huahana
Ua ulu wikiwiki ka laser thermokeratoplasty (LTK) i nā makahiki i hala iho nei. ʻO ke kumu kumu, ʻo ia ka hoʻohana ʻana i ka hopena photothermal o ka laser e hoʻoemi ai i nā fiber collagen a puni ka cornea a lilo ka curvature waena o ka cornea i kurtosis, i mea e hoʻokō ai i ke kumu o ka hoʻoponopono ʻana i ka hyperopia a me ka hyperopic astigmatism. Holmium laser (Ho:YAG laser) manaʻo ʻia he mea hana kūpono no LTK. ʻO ka lōʻihi o ka nalu o Ho: YAG laser he 2.06μm, nona ka laser mid-infrared. Hiki ke hoʻomohu pono ʻia e ka ʻiʻo o ke kino, a hiki ke hoʻomāhana ʻia ka makū o ka ʻili a hiki ke hoʻemi ʻia nā kolagen fibers. Ma hope o ka photocoagulation, ʻo ke anawaena o ka ʻāpana coagulation o ka corneal ma kahi o 700μm, a ʻo ka hohonu he 450μm, kahi mamao palekana mai ka endothelium corneal. ʻOiai ʻo Seiler et al. (1990) ua hoʻohana mua i ka Ho:YAG laser a me LTK i nā haʻawina hauʻoli, ua hōʻike ʻo Thompson, Durrie, Alio, Koch, Gezer a me nā mea ʻē aʻe i kā lākou hopena noiʻi. Ho: Ua hoʻohana ʻia ka YAG laser LTK i ka hana lapaʻau. ʻO nā ʻano like e hoʻoponopono ai i ka hyperopia ʻo ia ka radial keratoplasty a me ka excimer laser PRK. Ke hoʻohālikelike ʻia me ka keratoplasty radial, ʻike ʻia ʻo Ho:YAG e ʻoi aku ka wānana o LTK a ʻaʻole koi i ka hoʻokomo ʻana i kahi ʻimi i loko o ka ʻāʻī a ʻaʻole ia e hoʻoulu i ka necrosis o ka ʻiʻo corneal i ka wahi thermocoagulation. ʻO Excimer laser hyperopic PRK e waiho wale i kahi kikowaena corneal waena o 2-3mm me ka ʻole ablation, hiki ke alakaʻi i ka ʻoi aku o ka makapō a me ka ʻālohilohi o ka pō ma mua o Ho: Haʻalele ʻo YAG LTK i kahi kikowaena corneal waena o 5-6mm. ua hōʻike ʻia nā kristal he 14 mau kaila laser inter-manifold, e hana ana i nā ʻano kino mai CW a hiki i ka mode-locked. Ho: Hoʻohana maʻamau ʻia ka YAG ma ke ʻano he ala kūpono e hoʻopuka ai i ka hoʻokuʻu ʻana i ka laser 2.1-μm mai ka hoʻololi ʻana o 5I7-5I8, no nā noi e like me ka laser remote sensing, ʻoki kino, a me ka hoʻomake ʻana i nā Mid-IR OPO e loaʻa i ka 3-5micron emission. ʻO nā ʻōnaehana hoʻoheheʻe diode pololei a me Tm: Fiber Laser pumped system [4] ua hōʻike i ka hi slope efficiencies, kekahi e hoʻokokoke ana i ka palena theoretical.
Na Waiwai Kumu
| Ho3+ hoʻopaʻa ʻana | 0.005 - 100 ʻātoma % |
| Ka lōʻihi o ka hawewe | 2.01 um |
| Hoʻololi Laser | 5I7 → 5I8 |
| ʻO Floresence Lifetime | 8.5 ms |
| Ka lōʻihi o ka hawewe | 1.9 um |
| Coefficient o ka hoonui wela | 6.14 x 10-6 K-1 |
| Hoʻolahalaha wela | 0.041 knm2 s-2 |
| ʻO ka hoʻoili wela | 11.2 W m-1 K-1 |
| Wela Kūikawā (Cp) | 0.59 J g-1 K-1 |
| Kūleʻa haʻalulu wela | 800 W m-1 |
| Hōʻike Hōʻikeʻike @ 632.8 nm | 1.83 |
| dn/dT (Ka helu wela o Hōʻike Hoʻohālikelike) @ 1064nm | 7.8 10-6 K-1 |
| Kaumaha Molekala | 593.7 g mol-1 |
| Lae hehee | 1965 ℃ |
| ʻO ka mānoanoa | 4.56 g knm-3 |
| MOHS Oolea | 8.25 |
| Opio Modulus | 335 Gpa |
| Ikaika U'i | 2 Gpa |
| Hoʻokumu Crystal | Cubic |
| Kūlana Kūlana | |
| Y3+ Site Symmetry | D2 |
| Lattice Mau | a=12.013 Å |
