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Yb³⁺:CaF₂ (Ytterbium‑doped Calcium Fluoride) is a high‑performance laser crystal belonging to the cubic fluoride crystal family. It combines the excellent thermo‑mechanical properties and broad transmission range of the CaF₂ host with the simple electronic energy level structure of the Yb³⁺ ion, making it especially suitable for high‑power lasers and ultrafast laser systems. Its broad emission bandwidth supports femtosecond‑scale pulse generation, while its high thermal conductivity ensures stable operation under high‑power pumping.
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Property
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Value
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Remarks
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Chemical Formula
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Yb³⁺:CaF₂
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Crystal Structure
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Cubic crystal system
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Absorption Peak Wavelength
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976 nm
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Room temperature
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Peak Absorption Cross Section
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0.54×10⁻²⁰ cm²
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Laser Wavelength
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1020–1060 nm
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Lifetime (²F₅/₂ Level)
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2.4 ms
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Emission Cross Section @1040 nm
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0.16×10⁻²⁰ cm²
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Refractive Index @632.8 nm
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1.43
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Density
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3.18 g/cm³
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Mohs Hardness
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4
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Thermal Conductivity
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5.4 W·m⁻¹·K⁻¹
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Room temperature
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Item
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Specification
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Doping Concentration
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1–5 at.%
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Clear Aperture
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>90%
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Surface Dimension Tolerance
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+0.0 / –0.1 mm
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Length Tolerance
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±0.1 mm
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Parallelism
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<20 arcsec
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Perpendicularity
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<10 arcmin
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Chamfer
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<0.15 mm × 45°
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Surface Finish
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20/10 (per MIL‑PRF‑13830B standard)
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Surface Flatness
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<λ/10 @ 632.8 nm
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Coating
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Antireflection: AR (R<0.5%) @ 980 nm + AR (R<0.35%) @ 1040–1070 nm; custom available
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Laser Damage Threshold
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>10 J/cm² @ 1040 nm, 10 ns pulse width
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Shelf Life
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1 year
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Precision Processing and Micro/Nano Manufacturing: Ideal for fine‑machining applications with stringent requirements on beam quality and pulse characteristics.