Cr:YAG
我司的Cr4+：YAG晶體，又稱摻鉻釔鋁石榴石晶體，化學式為Cr:Y3Al5O12，是一種綜合性比較優良的調Q晶體產品。不僅可以用作Q 開關，還可以用作增益介質，因為它具有優異的物理化學性質。在激光測距儀、LIDAR和LIBS 系統的無源Q開關激光器領域有廣泛的應用。Cr:YAG具有化學穩定、耐用、抗紫外線、導熱性好、損傷閾值高（>500 MW/cm2）、操作簡單等優點，正在超越LiF和有機染料等傳統材料。Cr:YAG是用于無源Q開關（激光二極管或燈泵浦）Nd:YAG、Nd:YLF、Nd:YVO4的優秀且廣泛使用的電光材料和其他 0.8~1.2μm 的 Nd（或Yb）摻雜激光器，也是一種可用作CW、脈沖或自鎖模可調諧 NIR 固態激光器的活性介質，可調諧范圍為1340 – 1580nm以及工作波長為950-1100nm的激光器中用于Q開關的介質。1060 nm 波段的吸收飽和可用于具有閃光燈或激光二極管泵浦的小型 Nd:YAG 振蕩器，而不是基于染料或LiF:F中心無源Q開關，使Cr4+:YAG晶體可以實現自鎖模 (KML) 狀態。它提供了在1450-1580nm處構建脈沖持續時間短于100fs的激光源的機會。
特點
- 高導熱率
- 高損傷閾值（> 500MW/cm2）
- 優異的理化特性
- 輻射穩定性
物理和化學特性
| 屬性 | 數值 |
| 化學式 | Cr4+:Y3Al5O12 |
| 晶體結構 | cubic – la3d |
| 晶格參數? | 12.01 |
| 取向 | [100] or [110] < ±0.5° |
| 質量密度 | 4.56 g/cm3 |
| 莫氏硬度 | 8.5 |
| 楊氏模量 | 335 GPa |
| 抗拉強度 | 2 GPa |
| 熔點 | 1970°C |
| 導熱系數 | 0.1213 |
| 比熱/（J·g-1·K-1） | 0.59 |
| 熱膨脹/（10-6 /°C @ 25°C） | 7.8 <111> |
| 7.7 <110> | |
| 8.2 <100> | |
| 抗熱震參數 | 800 W/m |
| 消光比 | 25dB |
| 泊松比 | 0.25 |
| 折射率@ 1064 nm | 1.83 |
| 電荷補償離子 | Ca2+, Mg2+ |
光學性質
| 屬性 | 數值 |
| 光密度 | 0.1 to 0.8 |
| 熒光壽命 | 3.4μs |
| 濃度 | 0.5 mol % ~ 3 mol % |
| 發射波長 | 1350 nm ~ 1600 nm |
| 吸收系數 | 1.0 cm-1?～ 7 cm-1 |
| 基態吸收截面 | 4.3×10-18?cm2 |
| 發射態吸收截面 | 8.2×10-19?cm2 |
| 傳輸 | 10% to 90% |
| 涂層 | AR≤ 0.2% @1064nm |
| 損傷閾值 | > 500 MW / cm2 |
拋光
| 屬性 | 數值 |
| 方向公差 | < 0.5° |
| 厚度/直徑公差 | ±0.05 mm |
| 表面平整度 | <λ/8@632 nm |
| 波前失真 | <λ/4@632 nm |
| 表面質量 | 5-Oct |
| 平行 | 10〞 |
| 垂直 | 5ˊ |
| 通光孔徑 | >90% |
| 倒角 | <0.1×45° |
| HR涂層 | <= 0.2% (@ 1340nm) |
| 最大尺寸 | 2*2-15*15 mm×20mm |
光譜
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參考文獻
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