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Physical Property
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Value
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Remarks
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Crystal Structure
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Tetragonal
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Lattice Parameters
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a = b = 7.1193 Å, c = 6.2892 Å
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Density
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4.22 g/cm³
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Atomic Density
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1.26×10²⁰ at/cm³
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Nd doping concentration 1.0 at.%
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Mohs Hardness
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4–5
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Similar to glass
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Thermal Expansion Coefficient (27 °C)
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αₐ = 4.43×10⁻⁶/K, α𝒸 = 11.37×10⁻⁶/K
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Thermal Conductivity (27 °C)
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∥C: 5.23 W/m·K; ⊥C: 5.10 W/m·K
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Thermo‑optic Coefficient (27 °C)
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dnₒ/dT = 8.5×10⁻⁶/K, dnₑ/dT = 2.9×10⁻⁶/K
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Laser Wavelength
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1064 nm, 1342 nm
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Stimulated Emission Cross Section
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25×10⁻¹⁹ cm² @ 1064 nm
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Fluorescence Lifetime
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90 μs
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Fluorescence lifetime at 1% Nd doping
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Absorption Coefficient
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31.4 cm⁻¹ @ 810 nm
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Intrinsic Loss
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0.02 cm⁻¹ @ 1064 nm
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Gain Bandwidth
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0.96 nm @ 1064 nm
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Conversion Efficiency
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>60%
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Item
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Specification
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Material
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Nd:YVO₄
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Doping Concentration (at.%)
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Nd: 0.2–1.1 at.%
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Crystal Orientation
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[111] or [100]
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Wavefront Distortion
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λ/8 per inch @ 633 nm
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Extinction Ratio
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≥30 dB
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Crystal Size
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Diameter: 1–50 mm, Length: 0.3–200 mm, custom sizes available per customer request
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Dimensional Tolerance
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Diameter: ±0.02 mm, Length: ±0.2 mm
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Parallelism
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≤10 arcsec
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Perpendicularity
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≤5 arcmin
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Flatness
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λ/10 per inch @ 633 nm
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Surface Finish
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10/5 (reference MIL‑PRF‑13830B standard)
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Bevel
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0.1 mm @ 45°
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Clear Aperture
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>95%
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Coating
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HR @ 1064 nm & 532 nm & HT @ 808 nm / AR @ 1064 nm & 532 nm
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Shelf Life
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1 year under normal use
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Comparison Dimension
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Advantage Performance of Nd:YVO₄
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Advantage Principle / Application Value
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Absorption Characteristics
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Higher absorption coefficient (e.g., ~31.4 cm⁻¹ at 810 nm for 1% Nd doping) and broader absorption bandwidth (~18 nm at 808 nm pump band)
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1. Higher absorption efficiency of pump light (e.g., 808 nm diode laser), reducing pump energy loss;
2. Broader absorption bandwidth lowers requirement for pump wavelength stability, simplifies optical path design, and reduces system cost
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Stimulated Emission Performance
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Larger stimulated emission cross section (~25×10⁻¹⁹ cm² at 1064 nm for 1% Nd doping), 3–5 times that of Nd:YAG
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Stronger stimulated emission capability, easier to achieve laser oscillation, especially suitable for low‑threshold, high‑gain laser output; prominent advantage in high‑power‑density applications such as micromachining and laser marking
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Polarization Characteristics
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Naturally outputs π‑polarized laser (parallel to c‑axis), no extra polarizing elements required
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1. Eliminates polarizers in the optical path, reducing optical loss and improving system optical‑to‑optical conversion efficiency;
2. Meets polarization‑dependent application needs (e.g., laser communication, polarization lidar), simplifying device structure
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Thermo‑optic Characteristics
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Lower thermo‑optic coefficients (dnₒ/dT≈8.5×10⁻⁶/K, dnₑ/dT≈2.9×10⁻⁶/K at 300 K), smaller thermally induced refractive index distortion
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1. Less beam quality degradation due to temperature change during operation, suitable for long‑duration high‑power running;
2. Reduces complexity of thermal management system design, lowering device volume and energy consumption
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Optical‑to‑Optical Conversion Efficiency
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Higher efficiency (typically >60%), significantly better than Nd:YAG (~50%)
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1. Less loss in converting input pump energy to output laser energy, notable energy saving effect;
2. Under same pump power, yields higher laser output power, improving equipment working efficiency
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Fluorescence Lifetime
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Shorter fluorescence lifetime (~90 μs for 1% Nd doping, Nd:YAG ~230 μs)
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More suitable for short‑pulse laser output (e.g., Q‑switched pulse laser), narrower pulse width and higher peak power, advantageous in scenarios such as laser ranging and precision material drilling
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