β-BBO
β-BBO (barium metaborate) is a negative uniaxial nonlinear optical crystal with a wide phase-matching band (409.6-3500 nm), wide transmission band (190-3500 nm), high frequency-doubling conversion efficiency (about 6 times that of KDP), high damage threshold, good optical homogeneity (δn≈10-6/cm) and wide temperature acceptance (~55 ℃). Crystals can be provided with a minimum thickness of 0.005 mm, a maximum length of 25 mm and a maximum size of 15×15×15 mm^3.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Crystal Structure | Trigonal crystal system; space group R3c |
| Unit Cell Parameters | a=b=12.532 Å，c=12.717 Å，Z=6 |
| Mohs Hardness | 4 Mohs |
| Coefficient of Thermal Expansion | α_11=4×10^-6 /K，α_33= 36×10^-6 /K |
| Transmission Band | 190-3500 nm |
| Absorption Coefficient | ＜0.1%/cm @ 1064 nm， ＜1%/cm @ 532 nm |
| Receiving Angle | 0.8 mrad·cm （θ， TypeⅠ，1064 SHG） 1.27 mrad·cm （θ， TypeⅡ，1064 SHG） |
| Temperature Bandwidth | 55 ℃·cm |
| Receiving Spectral Width | 1.1 nm·cm |
| Walk-off Angle | 2.7° （TypeⅠ，1064 SHG） 3.2° （TypeⅡ，1064 SHG） |
| Nonlinear Optical Coefficient | deff（Ⅰ）=d_31sinθ+（d_11cos3Ф-d_22sin3Ф）cosθ deff（Ⅱ）=（d_11sin3Ф+d_22cos3Ф）cos2θ |
| Nonzero Nonlinear Optical Coefficient | d_11=5.8×d36（KDP）=2.55 pm/V d_31=0.05×d_11 d_22＜0.05×d_11 |
| Sellmeier Equation (Pure YVO4, λ in μm) | n_o^2 = 2.7359 + 0.01878 / (λ^2 - 0.01822) - 0.01354 λ^2 n_e^2 = 2.3753 + 0.01224 / (λ^2 - 0.01667) - 0.01516 λ^2 |
| Relative Permittivity | ɛ^s_11/ɛ_o: 6.7 ɛ^s_33/ɛ_o: 8.1 Tanδ＜0.001 |
| Effective Clear Aperture | 90% central area |
| Internal Quality | 50 mW green light detection, no visible scattering path or center |
| Flatness | ≤λ/8 @ 633 nm |
| Transmitted Wavefront Distortion | ≤λ/8 @ 633 nm |
| Parallelism | 20″ |
| Perpendicularity | 15′ |
| Warranty Period | One year (normal use) |
Applications
Datasheet
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Supplier Information
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