Co:Spinel(鈷尖晶石)

我司的Co:spinel晶體,又稱鈷尖晶石,化學式為Co2+: MgAl2O4,是一種綜合性比較優良的調Q晶體產品。鈷尖晶石是可飽和吸收體,是用于在人眼安全波長 1.5μm 下工作的固態激光器的無源 Q 開關。鈷摻雜的鋁酸鎂尖晶石(Co:MgAl2O4)可以產生短的納秒脈沖,在眼睛安全波長 1.5μm 附近具有高峰值功率,非常適合遙測應用。具有高吸收段、使用壽命長、鈷分布均勻、吸收帶寬等優點。Co2+摻雜 MgAl2O4 的吸收光譜在 1200-1600nm 波長范圍內表現出寬的吸收帶,表明 Co2+離子取代了 MgAl2O4晶格中四面體配位的 Mg2+離子。具有固態可飽和吸收體的固態激光器的無源 Q 開關是一種非常有吸引力的 Q 開關技術,因為它允許開發緊湊且低成本的納米和亞納秒脈沖激光源。在工業應用中,由于 1.5μm 激光的輻射對眼睛安全性較高,因此該波長得到廣泛關注。這種波長的其他優點是大氣和熔融石英波導的高透明度和靈敏的室溫光探測器(Ge 和 InGaAs 光電二極管)的可用性。這使得 1.5μm 激光器非常適用于測距儀,環境傳感,電信,手術等。Co:尖晶石吸收峰接近 1520nm,最常用于人眼安全激光。
物理和化學特性
屬性 | 數值 |
化學式 | Co2+:MgAl2O4 |
晶體結構 | 立方 |
晶格參數 | 8.07? |
密度 | 3.62 g/cm3 |
熔點 | 2105°C |
折光率 | n=1.6948 @1.54 μm |
導熱系數/((W·cm-1·K-1 @ 25°C) | 0.033W |
熱膨脹/(10-6 /°C @ 25°C) | 1.046 |
比熱/(J·g-1·K-1) | 5.9 |
硬度(莫氏) | 8.2 |
消光比 | 25dB |
取向 | [100] or [111] < ±0.5° |
光密度 | 0.1-0.9 |
損傷閾值 | >500 MW/cm2 |
Co2+的摻雜濃度 | 0.01-0.3 atm% |
材料規格
屬性 | 數值 |
濃度 | (0.05~0.35) wt% |
吸收系數 | 0 ~ 7 cm-1 |
基態吸收截面GSA(E-19 cm2) | 2.8(±0.4)@1340nm |
激發態吸收截面ESA(E-20 cm2) | 2.0(±0.6)@1340nm |
基態吸收截面GSA(E-20 cm2) | 3.5(±0.4)@1540nm |
激發態吸收截面ESA(E-20 cm2) | 1.0(±0.6)@1540nm |
工作波長 | 1200 – 1600 nm |
最終配置 | Flat/Flat |
品質因數(FOM) | 100~300 |
涂層 | AR/AR@1540,R<0.2%; |
AR/AR@1340,R<0.2% |
吸收發射光譜
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吸收光譜1 | 吸收光譜2 |
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發射光譜 |
參考文獻
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