Nd：YAP
Material: Nd:YAP; orientation: <5°; parallelism: ≤10″; perpendicularity: ≤5′; surface quality: 10-5 (MIL-O-13830A); wavefront distortion: λ/8 @633nm; flatness: ≤ λ/10 @632.8nm; clear aperture: >95%; length tolerance: +0.5/-0mm; thickness/diameter tolerance: ±0.05 mm; damage threshold: ≥500MW/cm2. Nd:YAP has high thermal conductivity and a large stimulated-emission cross-section at the 4F3/2–4 I13/2 transition. It is among the most efficient known laser crystals for high-power 1300nm operation, mainly LD-pumped. The 1300nm laser is widely used in medicine, fiber communications, and military applications. Strong water absorption in this band gives good hemostasis for laser treatments including hemostasis, neurosurgery, pathological-tissue removal, and wrinkle removal. Crystal structure | Orthorhombic – Pbnm Lattice constants | a=5,176, b=5,307, c=7,355 Density | 5,35 g/cm3 Melting point | 1870°C Thermal conductivity | 0,11 W/(cm K) Thermo-optic coefficient (dn/dT) | na:9.7×10⁻⁶K-1 nc:14.5×10⁻⁶K-1 Thermal expansion/(10-6•K-1 @25°C) | 9.5 (a-axis), 4.3 (b-axis), 10.8 (c-axis) Hardness (Mohs) | 8.5 Shear modulus/Gpa | 2.2×10¹²dyn/cm2 Specific heat | 400 J/(kg K) Linear dispersion δn/δT[10-6K-1] | 9.7 (na)
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