Nd:GdVO₄
Our Nd:GdVO₄, also called neodymium-doped gadolinium vanadate, is a laser crystal with excellent overall performance. It is widely used in telemetry, ranging, and remote sensing. It features good thermal conductivity, a large stimulated-emission cross section, and a high laser damage threshold. It can be used in compact laser-diode-pumped solid-state (DPSS) lasers, lidar, and remote-sensing satellites.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Crystal Structure | Zircon tetragonal, space group D₄ₕ, a=b=7.21, c=6.35 |
| Melting point | 1780°C |
| Density | 5.47g/cm³ |
| Mohs hardness | Glassy, ~ 5 |
| Coefficient of thermal expansion | aₐ=1.5×10⁻⁶/K, a_c=7.3×10⁻⁶/K |
| Thermal conductivity | 11.7 W/m/K <110> |
| Peak Absorption Wavelength | 808.5 nm |
| Lasing wavelength | 912.6 nm, 1063.1 nm, 1341.3 nm |
| Crystal class [@1064nm nₒ=2.038184, nₑ=2.292962, @ 532nm nₒ=1.9977322, nₑ=2.219864, @ 808nm] | Positive uniaxial , nₒ=nₐ=n_b nₑ=n_c nₒ=1.9854, nₑ=2.1981, @ 1064nm nₒ=2.038184, nₑ=2.292962, @ 532nm nₒ=1.9977322, nₑ=2.219864, @ 808nm |
| Thermo-optic coefficient | dn/dT=4.7×10⁻⁶/K |
| Stimulated emission cross section [@1064 nm] | 7.60×10⁻¹⁹cm² @1064 nm |
| Fluorescence lifetime [@808 nm / 1 at% nd doped] | 95 ms (1 at% nd doped) @ 808 nm |
| Loss coefficient [@1064 nm] | 0.003 cm⁻¹@ 1064 nm |
| Absorption coefficient [@808 nm (1.2%)] | 74 cm⁻¹ @ 808 nm (1.2%) |
| Absorption Length [@808 nm] | 0.32 mm @ 808 nm |
| Intrinsic loss [@1064 nm] | Less 0.1% cm⁻¹, @1064 nm |
| Linewidth | 0.6 nm |
| Intended laser emission | Parallel to the optical axis (c-axis) |
| Diode-pumped optical-to-optical efficiency | > 60% |
| Orientation | a-cut (± 0.55° ) |
| Dimensional tolerance | +/-0.1mm |
| Wavefront distortion [@632.8nm] | <λ/8 @632.8nm |
| Surface Quality | 20/10 |
| Parallelism | < 10 arc seconds |
| Perpendicularity | < 5 arc minutes |
| Flatness [@632.8nm] | <λ/10 @632.8nm |
| Clear Aperture Dimension | Central 95% |
| Chamfer | 0.15×45° |
| Coating [@1064nm R<0.1% 2.AR@1064nm R< 0.1% & HT@808nm T>95% 3.HR@1064nm R>99.8% & HR@532nm R>99% & HT@808nm T>95%] | 1.AR@1064nm R<0.1% 2.AR@1064nm R< 0.1% & HT@808nm T>95% 3.HR@1064nm R>99.8% & HR@532nm R>99% & HT@808nm T>95% |
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