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NLO Crystal
Overview
| NLO Crystal | BBO | KTP | LBO | LiNbO3 |
|---|---|---|---|---|
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| Physical and Optical Properties | ||||
| NLO theroy | ||||
| Crystal Structure | trigonal, space group R3c | Orthorhombic, point group mm 2 | Orthorhombic, point group mm 2 | Trigonal, space group R 3c |
| Transparency Range | 189 - 3500 nm | 350nm~4500nm | 160 - 2600 nm | 420 - 5200 nm |
| Cell Parameters | a=b=12.532Å, c=12.717Å | a=6.404Å, b=10.616Å, c=12.814Å | a=8.44731Å, b=7.3788Å, c=5.1395Å | a = 0.515Å, c = 13.863Å |
| Melting Point | 1095 +/-5°C | 1172°C incongruent | 834°C | 1255 +/-5°C |
| Curie point | 925 +/-5°C | 936°C | 1140 +/-5°C | |
| Optical Homogeneity | Δn ≈ 10-6 /cm | Δn ≈ 10-6 /cm | Δn ≈ 10-6 /cm | Δn ≈ 5 x 10 -5 /cm |
| Mohs Hardness | 4.5 | 5 | 6 | 5 |
| Density | 3.85 g/cm3 | 3.01 g/cm3 | 2.47g/cm3 | 4.64 g/cm3 |
| Thermal Conductivity | |_ c, 1.2 W/m/K; ||c, 1.6 W/m/K | 0.13 W/cm/°K | 38 W /m /K @ 25°C | |
| Phase-matchable SHG range | 205nm-1750nm | 1000-2000nm | 800-2000nm | |
| Absorption Coefficient | < 0.1%/cm (at 1064 nm) | a < 1%/cm @1.064 µm and 0.532 µm | <=1%/cm at 1064nm | <0.1%/cm @ 1064 nm |
| NLO coefficients | d11 = 5.8 x d36(KDP) d11 = 0.05 x d 11 , d22 < 0.05 x d11 | d31 =2.54pm/V, d31 =4.35pm/V, d31 =16.9pm/V d24 =3.64pm/V, d15 =1.91pm/V at 1.064 mm | d33 = 34.4pm/V d31 = d15 = 5.95pm/V d22 = 3.07pm/V | |
| Damage Threshold at 1.064 mm | 12.9J/cm2 9.9GW/cm2 | 6.0J/cm2; 4.6GW/cm2 | 24.6J/cm2; 18.9GW/cm2 | 200 MW/cm2 |
| Refractive Indices at 1.0642 mm at 0.5321 mm | ne = 1.5425, no = 1.6551 ne = 1.5555, no = 1.6749 | Nx = 1.73991 Ny = 1.74802 Nz = 1.82956 Nx = 1.77903 Ny = 1.79002 Nz = 1.88628 | Nx = 1.56447 Ny = 1.59050 Nz = 1.60538 Nx = 1.57842 Ny = 1.60650 Nz = 1.62154 | No = 2.23216 Ne = 2.15600 No = 2.32309 Ne = 2.23415 |
| Typical Specification and Capabilities | ||||
| Angle tolerance | Δθ< ± 0.5°; Δφ< ±0.5° | Δθ< ± 0.5°; Δφ< ±0.5° | Δθ< ± 0.5°; Δφ< ±0.5° | Δθ< ± 0.5°; Δφ< ±0.5° |
| Dimension tolerance | (W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm) | (W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm) | (W ± 0.2mm) x (H ± 0.2mm) x (L + 0.2mm/-0.2mm) | (W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm) |
| Flatness | < λ /8 @ 633nm | λ/8 @ 633nm | λ /4 @ 632.8nm | < λ/8 @ 633nm |
| Scratch/Dig code | better than 10/5 Scracth/dig per MIL-O-13830A | better than 10/5 Scracth/dig per MIL-O-13830A | Better than 20/10 Scracth/dig | better than 10/5 Scracth/dig per MIL-O-13830A |
| Parallelism | < 20 arc seconds | < 20 arc seconds | < 20 arc seconds | < 20 arc seconds |
| Perpendicularity | < 5 arc minutes | < 5 arc minutes | < 30 arc minutes | < 5 arc minutes |
| Wavefront distortion | < λ/8 @ 633nm | < λ/8 @ 633nm | < λ/4 @ 632nm | < λ/8 @ 633nm |
| Clear aperture | > 90% central area | > 90% central area | Central 80% | > 90% central area |
| Aperture | 1x1 ~ 12x12mm | 1x1 ~ 10x10mm | 2 ~ 10mm | 1~50 mm |
| Length | 0.02 ~ 25mm | 0.05 ~ 20mm | 0.3~20 mm | 0.3~20 mm |
| Phase matching type | Type I or Type II | Type II | Type I or Type II | Type I or Type II |
| End configuration | Flat or Brewster or Specified | Flat or Brewster or Specified | Flat, spherical, parallel and wedged | Flat, spherical, parallel and wedged |
| Typical Coating | Antireflective coating | Antireflective coating Highreflective Coating | Antireflective Coating | Antireflective Coating |