Co:Spinel crystals
Main features
- Low optical losses in the wavelength range of 1,3 µm - 1,6 µm
- The high laser-induced damage threshold
- Custom crystals available upon request
Application examples
- Passive Q-switch for Er:Glass lasers @1,54 µm
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- Description
- Properties
- Absorption and emission curves
- Standard specifications
Co:Spinel is a recently developed material, which has been proven to be a very effective passive Q-switch in lasers emitting in the range of 1,2 µm - 1,6 µm. Co:Spinel has a high absorption cross-section, which permits Q-switch operation of Er:glass laser (both flash-lamp and diode-laser pumped) without an intracavity focusing. Negligible excited-state absorption results in a high contrast Q-switch operation, the ratio of the initial (small signal) to saturated absorption is higher than 10.
Material related spectroscopic and thermo-mechanical properties | ||||||
---|---|---|---|---|---|---|
Material | σgsa1)@1,54 µm | σesa2)@1,54 µm | τsa3) | Laser crystal | λlaser | σgsa/σem4) |
Co2+:MgAl2O4 | 3,5 × 10-19 cm2 | 0,1 × 10-19 cm2 | 220-350 ns | Nd:YAP | 1,34 µm | 1,5 |
Nd:KGW | 1,35 µm | 4 | ||||
Nd:YAG | 1,44 µm | 12 | ||||
Er:glass | 1,54 µm | 40 |
Crystal structure | Cubic |
Density | 3,58 g/cm3 |
Thermal expansion coefficient | 6,14 × 10-6 K-1 |
Thermal conductivity | 17 Wm-1K-1 |
Mohs hardness | 8 |
Refractive index | 1,6-1,75 |
Co:Spinel crystals | |
---|---|
Available initial transmission | 50-99%@1535 nm |
Initial transmission tolerance | ±1% (for values larger than 80%) |
Clear aperture | >90% |
Face dimensions tolerance | +0,0/-0,1 mm |
Parallelism error | <20 arcsec |
Perpendicularity error | <10 arcmin |
Protective chamfers | <0,1 mm at 45˚ |
Surface quality | 20-10 S-D |
Surface flatness | <λ/8@632,8 nm |
Wavefront distortion | <λ/4@632,8 nm |
Coatings | AR(R<0,15%)@1535 nm |
Laser-induced damage threshold | >8 J/cm2@1535 nm, 10 ns |
Mount | Unmounted |
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Face dimensions
Initial transmission
Coatings
SKU
PRICE
QUANTITY
3x3 mm
80%
AR/AR@1535 nm
7331
440 €
3x3 mm
85%
AR/AR@1535 nm
7332
440 €
3x3 mm
90%
AR/AR@1535 nm
7333
440 €
3x3 mm
92%
AR/AR@1535 nm
7334
440 €
3x3 mm
95%
AR/AR@1535 nm
7335
440 €
3x3 mm
97%
AR/AR@1535 nm
7336
440 €
5x5 mm
80%
AR/AR@1535 nm
7338
510 €
5x5 mm
85%
AR/AR@1535 nm
7339
510 €
5x5 mm
90%
AR/AR@1535 nm
7340
510 €
5x5 mm
92%
AR/AR@1535 nm
7341
510 €
5x5 mm
95%
AR/AR@1535 nm
7342
510 €
5x5 mm
97%
AR/AR@1535 nm
7343
510 €
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