YLF laser siv lead ua yog lo lus rau yttrium lithium fluoride (YLiF4). YLF yog ib lub noob pob kws xyaw nqaij npog, feem ntau doped nrog neodymium (Nd_ thiab nquag siv laser zaus tshwm sim ntawm 1047 nm (zus raws ib-axis) thiab 1053 nm (zus raws c-axis), tab sis muaj ntau tsawg lub ntiaj teb doped YLF muaju, zoo li nrog Ytterbium (Yb), Erbium (Er), thulium (Tm), Holmium (Ho) los yog praseodymium (Pr) doping.
Nws yog ib qho laser nruab nrab ntawm lub laser solid-state, uas yog tseem siv tau nyob ze-infrared laser. Txawv Wavelengths ntawm Neodymium, Erbium, Holmium lossis Thulium doped Lithium Yttrium Fluorides:
| Nd: YLF | 1.047 µm, 1.053 µm, 1.313 µm, 1.324 µm, and 1.370 µm |
| Er: YLF | 0.85 µm and 2.81 µm |
| Ho: YLF | 0.75 µm and 2.06 µm |
| Tm: YLF | 0.435 µm, 1.89 µm, and 2.30 µm |
Neodymium-doped YLF Crystal muaj ntau txoj kev sib npaug zos, tsis muaj teeb meem thermal lensing, thiab kev tsis zoo ntawm lub ntsuas kub coefficient tsis zoo, muaj peev xwm ua tau ntau tus tawm ntawm cov qhov tso tawm wavelength, uas yog ib qho kev ua tau zoo siv laser. YLF Neodymium-doped YLF tuaj yeem muab cov pa phais siab dua Nd: YAG rau cov nqi ntawm ob peb kHz lossis tsawg dua. Piv rau Nd: YAG, Nd: YLF Crystal yog heev nkig thiab txhoj puab heev.
1. Muaj hwj chim loj, qis qis divergence, npaum tib hom lag luam.
2. Siv nruab nrab qis Q qis hloov ntawm tus nqi qis dua.
3. Tawm sab nrauv polarized resonators rau Q-switching thiab zaus zaus.
4. Muaj peev xwm ua tsis tau rau hom lub pob zeb loj loj los yog pob zeb loj.
Stimulated emission cross section thiab qhov khoom siv mus ntev yog qhov txiaj ntsig rau qis CW tsawg. 1.053 μm tso tawm cov khoom muaj nqis nkag tau ntawm Nd: Cov iav thiab ua haujlwm zoo li ib qho oscillator thiab pre-amplifier rau cov tswv tsev no.
Kev sib xyaw ntawm cov thermal lensing, lub dav fluorescence kab dav, thiab roj hmab oscillation naturally ua Nd: YLF khoom zoo heev rau CW, hom haujlwm xauv. Zoo siab txais tos rau txhua tus neeg muag khoom YLF laser siv lead ua
Nd: YLF laser muaj peev xwm los yauv ua pa dua siab dua Nd: YAG laser rau cov nqi ntawm ob peb kHz. Nws yog siv rau hauv Q-qhov nruab nrab ntawm nws cov kev ua kom lub cev tsis ntev los no. Raws li nrog Nd: YAG lasers, Q-switched Nd: YLF tswj kev tsim harmonic cim los ua lub caij nyoog wavelengths. Nd: YLF lasers tuaj yeem tsim teeb-pumped lossis diode-pumped. Thaum piv rau Nd: YAG laser, Nd: YLF laser muaj cov thermal conductivity tsawg. Txawm li cas los xij, nws tuaj yeem ua kom tsis muaj zog thermal distortions kom ua kom zoo siab nqaj.
| Chemical Formula | LiY 1.0-xNdxF4 |
| Lattice Parameters | a=5.16Å |
| b=10.85Å | |
| Crystal Structure | Tetragonal |
| Space Group | I41/a |
| Nd atoms/cm3 | 1.40x1020 atoms/cm3 for 1% Nd doping, |
| Mohs Hardness | 4 ~ 5 |
| Melting Point | 819℃ |
| Density | 3.99 g/cm3 |
| Modulus of Elasticity | 85 GPa |
| Thermal Expansion Coefficient | 8.3x10-6/k ^c, ac=13.3x10-6/k ||c |
| Thermal Conductivity Coefficient | 0.063 W/cm K |
| Specific Heat | 0.79 J/g K |
Tsis muaj doped YLF Crystal yog ib yam khoom siv tsawg-earth-doped laser nrog ntau yam teebmeem ntawm UV mus rau nruab nrab-IR ntau. YLF muaj cov khoom siv kho qhov muag zoo uas muaj lub siab zoo nyob thoob plaws cov qauv cua emission ntawm cov chaw siv los siv cov khoom siv lub xeev lasers. YLF tsis pom UV qhov kev puas tsuaj, thiab nws txo qis dua tsis muaj hluav taws xob rau cov txheej txheem ntawm cov hluav taws xob theem uas koom rau hauv kev siv zog thiab kev ua haujlwm.
Tsis muaj doped YLF Crystal kuj muaj tsawg, ob-photon absorption coefficient. Vim tias nws tsis muaj cov hluav taws xob uas tsis muaj zog, cov khoom siv yuav raug siv rau cascade emission ntawm cov theem theem nrab nrog rau kev tshaj tawm.
YLF kuj yog qhov nruab nrab zoo rau kev kaw khi ntawm 1047 los yog 1053 nm thiab 1.313 μm los ntawm nws cov kev ua dog ua dog dig thiab tsis thermal lensing. Hloov xauv xauv los ntawm YLF yog luv luv ua tsaug rau nws cov kev linebidth, ob qho tib si rau 1047/1053-nm thiab 1.313-μm emission peaks.
| Transparency Region | 180nm to 6.7mm | |||||
| Peak Simulation Emission Cross Section | 1.8x10-19cm2 (E || c) at 1.047mm | |||||
| 1.2x10-19cm2 (E ^ c) at 1.053mm | ||||||
| Spontaneous Fluorescence Lifetime | 485ms for 1% Nd doping | |||||
| Scatter Losses | <0.2% / cm | |||||
| Peak Absorption Coefficient | a=10.8cm-1 (792.0 nm E || c) | |||||
| a=3.59cm-1 (797.0 nm E ^ c) | ||||||
| Refractive Indices | Wavelength (nm) | ne | ne | |||
| 262 | 1.485 | 1.511 | ||||
| 350 | 1.473 | 1.491 | ||||
| 525 | 1.456 | 1.479 | ||||
| 1050 | 1.448 | 1.47 | ||||
| 2065 | 1.442 | 1.464 | ||||
| Sellmeier Equations | ni2(l) = A + Bl2/(l2-C) - Dl2/(l2-E) | |||||
| A | B | C | D | E | ||
| no | 3.38757 | 0.70757 | 0.00931 | 0.18849 | 50.99741 | |
| n2 | 1.31021 | 0.84903 | 0.00876 | 0.53607 | 134.956 | |
| Wavelength（nm） | E∥c | E⊥c |
| 436 | -2.44×10-6/℃ | -0.54×10-6/℃ |
| 578 | -2.86×10-6/℃ | -0.91×10-6/℃ |
| 1060 | -4.30×10-6/℃ | -2.00×10-6/℃ |
Honor Optics khoom qis tus nqi qis YLF laser siv lead ua hauv pas nrig thiab cov lauj kaub tais diav uas muaj ntau txoj kab sib txawv, qhov ntev, thiab coatings. Sib txawv dopants kev sib txawv nrog ntau cov kev tswj muaj rau qee tus neeg yuav tsum tau ua. Nd: YLF yog qhov chaw tshaj tawm rau cov diode-pumped thiab arc teeb-pumped solid-state lasers. Naj huam ntev YLF cov nplais rau cov teeb uas siv teeb nrau nrog cov khoom sib piv rau 1.0 atom%, luv YLF cov nplais siv rau diode siv nrog concentration rau 1.5 atom%.
Lwm tus neeg zoo li Er: YLF, Ho: YLF thiab Tm: YLF ib leeg siv lead ua yog tsim los siv rau hauv cov khoom lag luam-xeev lasers uas yog siv rau cov kev lag luam, kev kho mob thiab kev tshawb fawb. Ntshiab YLF cov nplais yog pob tshab hauv cov qhab spectrum ntawm 0.12 - 7.5 μm, yees duab-, thermal- thiab hluav taws xob-resistant. Cov YLF Cov Ntsuas Muaj Muaj Cov Poj Yuam Tsis Muaj Kev Ntsuas Tsis Tshwm Sim thiab Qhov Ntsuas Phem Seem.
Doping concentration ntawm 0.5 rau 3.0mol%
Ntsig ntawm 2 hli mus rau 50.8 hli, ntev ntawm 1mm mus rau 180mm
Kev Taw Qhia Kev Taw Qhia: 5 arc feeb
Dopant Concentration Tolerance ------------------------ 0.1%
Kev Tshaj Tawm --------------------------------- - < 10 arc vib nas this
Perpendicularity --------------------------- < 5 arc feeb
Chamfer --------------------------------- ---- 0.1 hli @ 45 °
Cov Lus Aperture ------------------------------ 95%
Nto Zoo ----------------------------- 10/5
Nto npo ---------------------------- λ /10 @ 633nm
Wavefront Distortion ------------------------------ < λ /8 @ 633nm
YLF laser siv lead ua yog ib lub noob, uas tshem tawm cov khoom lag luam tho qhov tawm tsis tau. Qhov nce thiab ntog tawm ntawm Nd: Cov YLF yog nyob ntawm kev sib thooj: muaj zog 1047nm kab rau π polarization thiab ib weaker ib ntawm 1053nm rau σ polarization. Tus 1053 nm kab zoo fits qhov nce siab ntawm Nd: iav, ces Nd: YLF lasers feem ntau yog siv Nd: YLF laser-generator thiab preamplifier rau Nd tom ntej: iav amplifiers.
Nd: YLF muaj kev qhia ntxiv rau Nd: YAG tus tswv tsev rau cov haujlwm IR nyob ze. Ua ke nrog cov thermal lensing (19 lub sij hawm qis dua ntawm Nd: YAG), qhov loj fluorescence kab thiab qhov oar ua kom sov tau ua Nd: YLF khoom zoo heev rau CW, hom kev lag luam xauv. Q-Hloov chaw ua haujlwm ntawm tus nqi qis dua (~ 1 kHz). Txoj kab hluav taws xob ntsaws (polarized beam) yog qhov zoo tshaj plaws rau Q-switching thiab zaus zaus. Tus zais zis 1053 nm ncau qhov nce qhov khoom ntawm Nd-iav thiab yog li nws tuaj yeem ua tau zoo li tus oscillator los yog pre-amplifier rau Nd-iav laser party. Zoo siab txais tos rau txhua tus neeg muag khoom YLF laser siv lead ua.
Honour Optics khoom siv Nd, Pr, Er, Ho thiab tsis muaj doped YLF muaju uas siv cov txheej txheem Czochralski. Honour Optics yog ib qho kev lag luam hauv YLF laser chaw tsim hluav taws xob, muag high purity YLF laser siv lead ua, txais tos los sib tham txog cov nqi qis YLF laser siv lead ua qhov muag.