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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,0.012Wcm/K; ||c, 0.016 W/m/K |
0.13 W/cm/°K |
0.035 W/cm/K |
0.046W/cm/K` |
| Phase-matchable SHG range |
205nm-1750nm |
1000-2000nm |
800-2000nm |
1100-3000nm |
| Absorption Coefficient |
< 0.1%/cm (at 1064 nm) |
< 1%/cm @1064 nm and532nm |
<=1%/cm at 1064nm |
<0.1%/cm @ 1064 nm |
| NLO coefficients |
D21 =2.2pm/V
D31 =0.08pm/V
D22 =2.2pm/V
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d31 =1.95pm/V,
d32 =3.90pm/V,
d33 =15.3pm/V
d24 =3.90 pm/V,
d15 =1.95pm/V
|
D21 =0.67pm/V,
d22 =0.04 pm/V
d23 =0.85pm/V
d34 =0.85pm/V
d16 =0.67 pm/V
|
d21= d22= d16 =2.6pm/V
d31= d32 = d32 =4.6pm/V
d33=25.6pm/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 10/5 Scracth/dig per MIL-O-13830A |
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/4 @ 632nm |
| Clear aperture |
> 90% central area |
> 90% central area |
> 80% central area |
> 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 |
