Crystals Materials
Barium nitrate Crystals
for raman shifter for nanosecond applications
Barium nitrate (Ba(NO3)2) is one of the leading crystals among solid-state Raman shifters in terms of Raman gain coefficient, which is known to be the highest at nanosecond steady-state regime (gR = 47 cm/GW@532 nm pump). Barium nitrate also features a moderately broad transparency range (0,33-1,8 μm) and high damage threshold. Drawbacks of barium nitrate crystal are low thermal conductivity (1,17 Wm-1K-1) and high electro-optic coefficient (dn/dT = -20 × 10-6K-1), which lead to the thermal lensing effect. The crystal is soft and hygroscopic, therefore should be treated with caution.
| Orientation | [110] |
|---|---|
| Clear aperture | >90% |
| Face dimensions tolerance | ±0.5 mm |
| Length tolerance | ±1 mm |
| Parallelism error | < 5 arcmin |
| Perpendicularity error | < 10 arcmin |
| Protective chamfers | < 0.25 mm at 45˚ |
| Surface quality | 40-20 S-D |
| Surface flatness | < λ/4 @632.8 nm |
| Coatings | AR @500-700 nm |
| Laser-induced damage threshold | >10 J/cm2 @1064 nm, 10 ns |
| Mount | Unmounted |
| Chemical formula | Ba(NO3)2 |
|---|---|
| Crystal structure | Cubic, P213 |
| Lattice parameters | a = b = c = 8.11 Å |
| Density | 3.25 g/cm3 |
| Mohs hardness | 2.5-3 |
| Transparency range | 0.33-1.8 μm |
| Refractive index | 1.555 @1064 nm |
| Thermal conductivity | 1.17 Wm-1K-1 @||c |
| Thermal expansion coefficient | 13 × 10-6 °C-1 |
| dn/dT | -20 × 10-6 K-1 |
| Raman frequency shift | 1047 cm-1 |
| Raman linewidth | 0.4 cm-1 |
| Raman gain (ns, steady-state regime) | 47 cm/GW @532 nm 11 cm/GW @1064 nm |
| Dephasing time | 28 ps |
Stock specification list
If need other specifications and quantities products, please contact us(sales@aogcrystal.com).
Anti-reflection coatings are available at your specified wavelength.
Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.
To inquiry or order a finished Barium nitrate laser rod, please specify the specification listed above, for common application, we only need to know the main specification: Nd-dopant concentration, sizes, and coating. For special
request, please specify specification in details for evaluation and fabrication.
| Part Number | Face size | Length | Orientation | Coating |
|---|---|---|---|---|
| BN-Cry-001 | 5.0*5.0 mm | 15.0 mm | [110] | AR/AR@500-700 nm |
| BN-Cry-002 | 8.0*8.0 mm | 70.0 mm | [110] | AR/AR@500-700 nm |
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