Nd:YLF crystals
Main features
- Long lifetime of 4F3/2 neodymium energy level
- Considerably softer and more brittle than is Nd:YAG
- Nd:YLF (a-cut) crystals that are used inside a laser optical resonator are self polarizing
- Custom crystals available upon request
Application examples
- CW and pulsed operation at 1047nm and 1053 nm
- Materials processing, welding, cutting
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- Description
- Properties
- Absorption and emission curves
- Standard specifications
Nd3+:YLF crystal is characterized by a long lifetime of 4F3/2 neodymium energy level. Compared to Nd:YAG, the lower thermal conductivity and a weak negative dn/dT lead to lower thermal distortions and allow to achieve a better output beam quality. Another distinctive feature is the high UV transparency, which is favorable for pumping with xenon flashlamps.
| Spectroscopic and thermo-mechanical properties | |
|---|---|
| Absorption peak wavelength | 792 nm |
| Absorption coefficient at peak | 10 cm-1 |
| Absorption bandwidth at peak wavelength | ~5 nm |
| Laser wavelength | 1047, 1053 nm |
| Lifetime of 4F3/2 neodymium energy level | 485 μs |
| Emission cross-section | 15 × 10-20 (E||C) cm2@1047 nm 10 × 10-20 (E⊥C) cm2@1053 nm |
| Refractive index @1064 nm | no=1,448 ne=1,470 |
| Crystal structure | Tetragonal |
| Density | 3,95 g/cm3 |
| Mohs hardness | 5 |
| Thermal conductivity | 6 Wm-1K-1 |
| dn/dT | -4,6 × 10-6 (||c) K-1, -6,6 × 10-6 (||a) K-1 |
| Thermal expansion coefficient | 8 × 10-6 (||c) K-1, 13 × 10-6 (||a) K-1 |
| Typical doping level | 1-2 at. % |
| Nd:YLF crystals | |
|---|---|
| Orientation | a-cut, c-cut |
| Clear aperture | >90% |
| Face dimensions tolerance | +0,0/-0,1 mm |
| Length tolerance | ±0,1 mm |
| Parallelism error | <10 arcsec |
| Perpendicularity error | <10 arcmin |
| Protective chamfers | <0,1 mm at 45˚ |
| Surface quality | 10-5 S-D |
| Surface flatness | <λ/8@632,8 nm |
| Wavefront distortion | λ/4@632,8 nm |
| Coatings | AR(R<0,5%)@790-810 nm + AR(R<0,2%) @1047-1053 nm on both faces |
| Laser induced damage threshold | >10 J/cm2@1064 nm, 10 ns |
| Mount | Unmounted |
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Face dimensions
Length
End faces
Doping
Orientation
Coatings
SKU
PRICE
QUANTITY
⌀5 mm
10 mm
Right-angle cut
0,7%
a-cut
AR/AR@(790-810)+(1047-1053) nm
7097
540 €
⌀5 mm
20 mm
Right-angle cut
0,7%
a-cut
AR/AR@(790-810)+(1047-1053) nm
7098
640 €
⌀5 mm
50 mm
Right-angle cut
0,7%
a-cut
AR/AR@(790-810)+(1047-1053) nm
7099
Request
⌀5 mm
100 mm
Right-angle cut
0,7%
a-cut
AR/AR@(790-810)+(1047-1053) nm
7100
Request
⌀5 mm
10 mm
Right-angle cut
0,7%
c-cut
AR/AR@(790-810)+(1047-1053) nm
7101
580 €
⌀5 mm
20 mm
Right-angle cut
0,7%
c-cut
AR/AR@(790-810)+(1047-1053) nm
7102
680 €
⌀5 mm
50 mm
Right-angle cut
0,7%
c-cut
AR/AR@(790-810)+(1047-1053) nm
7103
Request
⌀5 mm
100 mm
Right-angle cut
0,7%
c-cut
AR/AR@(790-810)+(1047-1053) nm
7104
Request
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