BaF2 Optical Crystals for Cross Polarized Wave Generation
Cross-Polarized Wave (XPW) generation is a nonlinear third order process during which fundamental and generated waves have the same frequency; however, generated wave is perpendicularly polarized to pump wave… Read more →
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| SKU | Thickness · Group · Orientation · Size | |
|---|---|---|
| 540-7105 | 0.5 mm·Unmounted BaF2 Optical Crystals·[011]·10x10 mm |
Out of stock
Ships in: 62–65 calendar days
$209
|
| 540-7105M | 0.5 mm·BaF2 Optical Crystals mounted in Open Ring Holders·[011]·10x10 mm |
Out of stock
Ships in: 62–65 calendar days
$267
|
| 540-7110 | 1.0 mm·Unmounted BaF2 Optical Crystals·[011]·10x10 mm |
Out of stock
Ships in: 62–65 calendar days
$209
|
| 540-7110M | 1.0 mm·BaF2 Optical Crystals mounted in Open Ring Holders·[011]·10x10 mm |
Out of stock
Ships in: 62–65 calendar days
$267
|
| 540-7115 | 1.5 mm·Unmounted BaF2 Optical Crystals·[011]·10x10 mm |
8 in stock
Ships in: 2–5 calendar days
$209
|
| 540-7115M | 1.5 mm·BaF2 Optical Crystals mounted in Open Ring Holders·[011]·10x10 mm |
Out of stock
Ships in: 62–65 calendar days
$267
|
| 540-7120 | 2.0 mm·Unmounted BaF2 Optical Crystals·[011]·10x10 mm |
9 in stock
Ships in: 2–5 calendar days
$209
|
| 540-7120M | 2.0 mm·BaF2 Optical Crystals mounted in Open Ring Holders·[011]·10x10 mm |
Out of stock
Ships in: 62–65 calendar days
$267
|
| 540-7125 | 2.5 mm·Unmounted BaF2 Optical Crystals·[011]·10x10 mm |
9 in stock
Ships in: 2–5 calendar days
$209
|
| 540-7125M | 2.5 mm·BaF2 Optical Crystals mounted in Open Ring Holders·[011]·10x10 mm |
Out of stock
Ships in: 62–65 calendar days
$267
|
| 540-7130 | 3 mm·Unmounted BaF2 Optical Crystals·[011]·10x10 mm |
4 in stock
Ships in: 2–5 calendar days
$209
|
| 540-7130M | 3 mm·BaF2 Optical Crystals mounted in Open Ring Holders·[011]·10x10 mm |
Out of stock
Ships in: 62–65 calendar days
$267
|
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Specifications
Specifications
| Material | BaF₂ |
| Surface quality | 60-40 scratch & dig (MIL-PRF-13830B) |
| Clear aperture | 90% of diameter |
| Diameter tolerance | +0.0 -0.25 mm |
| Thickness tolerance | 0.2 mm |
| Parallelism | 3 arcmin |
| Flatness | λ / 2 @ 633 nm |
| BaF₂ | CaF₂ | CVD-Diamond | |
|---|---|---|---|
| Orientation | h-cut [011] | h-cut [011] | z-cut [001] |
| Length, mm | 2 | 2 | 1.2 |
| n | 1.464 | 1.426 | 2.383 |
| (10⁻²² m² / V²) | 1.53 | 0.94 | 11 |
| σ | -1.2 | -0.6 | -1.8 |
| GVD (fs² / mm) | -6 | -27 | 63 |
Physical Properties
| Crystal type | cubic |
| Density, g / cm³ | 5.27 |
| Melting point, °C | 1525 |
| Refractive index @ 0.265 µm | n = 1.51217 |
| Refractive index @ 10.3 µm | n = 1.39636 |
| Transmission band, µm | 0.135-15 |
Classification
| Line | femtoline |
Description
Cross-Polarized Wave (XPW) generation is a nonlinear third order process during which fundamental and generated waves have the same frequency; however, generated wave is perpendicularly polarized to pump wave polarization. Phase matching occurs over large bandwidth in XPW generation process. This means the same phase and group velocities for fundamental wave and XPW.
Cross-polarized wave (XPW) generation process is driven by the third order nonlinearity of the crystal,
The typical optical material used for cross-polarized wave (XPW) generation is Barium Fluoride (BaF₂) crystal with z ([001]) or holographic ([011]) crystallographic orientation. Theory predicts a maximum XPW energy conversion efficiency around 35% when using [011]-cut BaF₂ crystal with a concomitant pulse shortening factor of √3 corresponding to a pure third-order nonlinear process[¹].
Eksma Optics offers [011] orientation BaF₂ optical crystals (XPW crystals) for Cross-Polarized Wave (XPW) generation. BaF₂ optical crystals with orientation [001] as well CaF₂ optical crystals are available on request.
Characteristics of the different Cross Polarized Wave (XPW) crystals at 2.1 µm [2]
- Orientation: BaF₂: h-cut [011]; CaF₂: h-cut [011]; CVD-Diamond: z-cut [001]
- Length, mm: BaF₂: 2; CaF₂: 2; CVD-Diamond: 1.2
- n: BaF₂: 1.464; CaF₂: 1.426; CVD-Diamond: 2.383
- (10⁻²² m² / V²): BaF₂: 1.53; CaF₂: 0.94; CVD-Diamond: 11
- σ: BaF₂: -1.2; CaF₂: -0.6; CVD-Diamond: -1.8
- GVD (fs² / mm): BaF₂: -6; CaF₂: -27; CVD-Diamond: 63
[1] L. Canova, S. Kourtev, N. Minkovski, A. Jullien, R. Lopez-Martens, O. albert, and S.M. Saltiel, Appl. Phys. Lett. 92, 231102 (2008)
[2] Ricci, A., Silva, F., Julline, A., Cousin, S. L., Austin, D. R., Biegert, J., Lopez-Martens, R. Generation of High-Fidelity few-cycle pulses at 2.1 µm via cross-polarized wave generation. Optics Express 9711, 2013.04.22. Vol. 21, No. 8. DOI:10.1364/OE.21.009711
