Er: YAG -An Excellent 2.94 Um Laser Crystal
Mafotokozedwe Akatundu
Ntchitoyi imayang'ananso zomwe zikuwonetsa komanso njiraEr: YAGlaser skin resurfacing ndikuwonetsa udindo wa gulu la akatswiri pakuwunika ndi kuchiza odwala omwe adakumana ndi Er:YAG laser resurfacing pakhungu.
Er: YAG ndi mtundu wabwino kwambiri wa 2.94 um laser crystal, womwe umagwiritsidwa ntchito kwambiri pamachitidwe azachipatala a laser ndi magawo ena.Er: YAGcrystal laser ndiye chinthu chofunikira kwambiri cha 3nm laser, ndipo malo otsetsereka omwe ali ndi mphamvu zambiri, amatha kugwira ntchito kutentha kwa chipinda cha laser, laser wavelength ali mkati mwa gulu la chitetezo cha maso, etc.
2.94m uwuEr: YAGlaser yakhala ikugwiritsidwa ntchito kwambiri pa opaleshoni yachipatala, kukongola kwa khungu, chithandizo cha mano.Lasers mothandizidwa ndi Er:YAG (erbium m'malo: yttrium aluminium garnet), akugwira ntchito pa 2.94 microns, makhiristo awiri bwino m'madzi ndi madzi amthupi. Izi ndi zothandiza makamaka ntchito m'minda laser mankhwala ndi mano. Kutulutsa kwa Er:YAG kumathandizira kuyang'anira kopanda ululu kwa shuga m'magazi, pomwe kumachepetsa chiopsezo cha matenda. Ndiwothandizanso pakuchiza kwa laser minofu yofewa, monga cosmetic resurfacing. Ndizothandizanso pochiza minofu yolimba monga enamel ya dzino.
Er:YAG imakhala ndi mwayi kuposa makhiristo ena a laser mumitundu ya 2.94 micron popeza imagwiritsa ntchito YAG ngati kristalo wochititsa. Zakuthupi, zotentha komanso zowoneka bwino za YAG zimadziwika kwambiri komanso zimamveka bwino. Opanga ma laser ndi ogwiritsa ntchito amatha kugwiritsa ntchito chidziwitso chawo chakuzama ndi makina a laser a Nd:YAG kuti akwaniritse magwiridwe antchito apamwamba kuchokera ku 2.94 micron laser system pogwiritsa ntchito Er:YAG.
Basic Properties
| Coefficient of thermal Kukula | 6.14 x 10-6 K-1 |
| Kapangidwe ka Crystal | Kiyubiki |
| Thermal Diffusivity | 0.041 cm2 s-2 |
| Thermal Conductivity | 11.2 W m-1 K-1 |
| Kutentha Kwapadera (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 |
| Kulemera kwa Maselo | 593.7 g ufa - 1 |
| Melting Point | 1965 ° C |
| Kuchulukana | 4.56 g cm-3 |
| Kulimba kwa MOHS | 8.25 |
| Young's Modulus | 335 g pa |
| Kulimba kwamakokedwe | 2 gpa |
| Lattice Constant | ndi = 12.013 Å |
Technical Parameters
| Dopant ndende | Er: ~ 50 pa% |
| Kuwongolera | [111] mkati mwa 5° |
| Kusokonezeka kwa Wavefront | ≤0.125λ/inch(@1064nm) |
| Chiwerengero cha Kutha | ≥25 dB |
| Kukula kwa Ndodo | Diameter: 3 ~ 6mm, Utali: 50 ~ 120 mm |
| Pa pempho la kasitomala | |
| Dimensional Tolerances | Kutalika: 0.00/-0.05mm, |
| Utali: ± 0.5mm | |
| Mgolo Watha | Ground Malizani ndi 400 # Grit kapena opukutidwa |
| Kufanana | ≤10" |
| Perpendicularity | ≤5′ |
| Kusalala | λ/10 @632.8nm |
| Ubwino Wapamwamba | 10-5(MIL-O-13830A) |
| Chamfer | 0.15 ± 0.05mm |
| AR Coating Reflectivity | ≤ 0.25% (@2940nm) |
Mawonekedwe a Optical ndi Spectral
| Kusintha kwa Laser | 4I11/2 mpaka 4I13/2 |
| Laser Wavelengtha | 2940nm |
| Chithunzi cha Photon Energy | 6.75×10-20J(@2940nm) |
| Emission Cross Section | 3 × 10-20 cm2 |
| Index of Refraction | 1.79 @2940nm |
| Magulu a Pampu | 600-800 nm |
| Kusintha kwa Laser | 4I11/2 mpaka 4I13/2 |
