Barium nitrate crystals
Main features
- Transparency range from 350 nm to 1800 nm
- Raman frequency shift of 1048 cm-1
- Excellent Raman shifter for nanosecond applications
- Custom crystal dimensions, and coatings available upon request
Application examples
- External cavity Raman laser pumped by commercially available passively Q-switched nanosecond Nd:YAG laser
- Generation of 1,59 "eye-safe" radiation, which coincides with CO2 absorption line
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- Description
- Properties
- Standard specifications
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. 4Lasers recommend using barium nitrate as a Raman shifter for nanosecond applications. Minimum order quantity: 2 pieces of standard elements.
| Physical and optical properties | |
|---|---|
| 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 1oC-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 |
| Barium nitrate crystals | |
|---|---|
| Orientation | [110] |
| Clear aperture | >85% |
| 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 |
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Face dimensions
Length
Coatings
SKU
PRICE
QUANTITY
5x5 mm
15 mm
AR/AR@500-700 nm
28479
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5x5 mm
30 mm
AR/AR@500-700 nm
28480
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5x5 mm
45 mm
AR/AR@500-700 nm
28481
Request
8x8 mm
75 mm
AR/AR@500-700 nm
28482
Request
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