Ho:YAG - Nzira Inoshanda Kugadzira 2.1-μm Laser Emission
Product Description
Laser thermokeratoplasty (LTK) yakakura nekukurumidza mumakore achangopfuura. Nheyo yakakosha ndeye kushandisa iyo photothermal mhedzisiro yelaser kuita iyo collagen fibers yakatenderedza cornea kuderera uye yepakati curvature yecornea ive kurtosis, kuitira kuti uwane chinangwa chekugadzirisa hyperopia uye hyperopic astigmatism. Holmium laser (Ho: YAG laser) inoonekwa seyakanakira chishandiso cheLTK. Iyo wavelength yeHo: YAG laser ndeye 2.06μm, inova yepakati-infrared laser. Inogona kunyatsobatwa nekorneal tissue, uye hunyoro hwekorneal hunogona kupisa uye collagen fibers inogona kuderedzwa. Mushure me photocoagulation, dhayamita ye corneal surface coagulation zone inenge 700μm, uye kudzika i 450μm, inongori chinhambwe chakachengeteka kubva kune corneal endothelium. Kubva Seiler et al. (1990) yakatanga kushandisa Ho: YAG laser uye LTK muzvidzidzo zvekiriniki, Thompson, Durrie, Alio, Koch, Gezer nevamwe vakatevedzana vakarondedzera tsvakiridzo yavo. Ho: YAG laser LTK yakashandiswa mumakiriniki maitiro. Nzira dzakafanana dzekugadzirisa hyperopia dzinosanganisira radial keratoplasty uye excimer laser PRK. Kuenzaniswa neradial keratoplasty, Ho: YAG inoratidzika kunge inonyanya kufanotaura nezveLTK uye haidi kuiswa kweprobe mu cornea uye haikonzeri corneal tissue necrosis munzvimbo ye thermocoagulation. Excimer laser hyperopic PRK inosiya chete yepakati corneal renji ye2-3mm isina ablation, izvo zvinogona kutungamira mukupofumadza uye kupenya kwehusiku kupfuura Ho: YAG LTK inosiya yepakati corneal renji ye5-6mm.Ho:YAG Ho3+ ions yakanyudzwa mune insulating laser. makristasi akaratidzira 14 inter-manifold laser channels, anoshanda mumodhi yenguva kubva kuCW kuenda kumodhi-yakakiiwa. Ho:YAG inowanzoshandiswa senzira inoshanda yekugadzira 2.1-μm laser emission kubva ku5I7- 5I8 shanduko, yezvikumbiro senge laser remote sensing, kuvhiyiwa kwekurapa, uye kupomba Mid-IR OPO's kuwana 3-5micron emission. Yakananga diode pumped masisitimu uye Tm: Fiber Laser pumped masisitimu[4] yakaratidza hi slope efficiencies, mamwe achiswedera kumuganhu we theoretical.
Basic Properties
| Ho3+ concentration range | 0.005 - 100 atomic% |
| Emission Wavelength | 2.01 um |
| Laser Transition | 5I7 → 5I8 |
| Flouresence Hupenyu hwose | 8.5 ms |
| Pombi Wavelength | 1.9 um |
| Coefficient of Thermal Expansion | 6.14 x 10-6 K-1 |
| Thermal Diffusivity | 0.041 cm2 s-2 |
| Thermal Conductivity | 11.2 W m-1 K-1 |
| Chaicho Kupisa (Cp) | 0.59 J g-1 K-1 |
| Thermal Shock Resistant | 800 W m-1 |
| Refractive Index @ 632.8 nm | 1.83 |
| dn/dT (Thermal Coefficient of Refractive Index) @ 1064nm | 7.8 10-6 K-1 |
| Molecular Weight | 593.7 g mol-1 |
| Melting Point | 1965 ℃ |
| Density | 4.56 g masendimita-3 |
| MOHS Kuoma | 8.25 |
| Young's Modulus | 335 GPA |
| Tensile Simba | 2 Gpa |
| Crystal Structure | Cubic |
| Standard Orientation | |
| Y3+ Saiti Symmetry | D2 |
| Lattice Constant | a=12.013 Å |
