Crystals Materials
Co:Spinel Crystal for radar, ranging and corneal diseases applications
Co:Spinel 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 (3.5x10-19 cm2), which permits Q-switch operation of Er:glass laser (both flash-lamp and diode-laser pumped) without an intracavity focusing.
| Property | Value |
|---|---|
| Face Dimensions Tolerance | +0,0/-0,1 mm |
| Initial Transmission | 50-99%@1535 nm |
| Initial Transmission Tolerance | ±1% (for values larger than 80%) |
| Wavefront Distortion | <λ/8 @ 632.8 nm |
| Surface Flatness | <λ/8 @ 632.8 nm |
| Wavefront Distortion | <λ/4 @ 632.8 nm |
| Surface Quality | 10/5 per MIL-O-13830A |
| Parallelism | < 10 arcsec |
| Perpendicularity | 10 arcmin |
| Clear Aperture | > 90% |
| Chamfer | < 0.1 mm @ 45° |
| Coating | AR/AR@1535 nm, R<0.15%; AR/AR@1340 nm, R<0.2% |
| Property | Value |
|---|---|
| Chemical Formula | Co2+:MgAl2O4 |
| Crystal Structure | Cubic |
| Lattice Parameter | 8.07 Å |
| Mass Density | 3.62 g/cm3 |
| Melting Point | 2105°C |
| Mohs Hardness | 8.2 |
| Specific Heat/ (J/g/K) | 5.9 |
| Thermal Expansion /(10-6/°C@25°C) | 1.046 |
| Extinction Ratio | 25 dB |
| Thermal Conductivity/(W·cm-1·K-1@25°C) | 0.033 W |
| Refractive Index | n=1.6948 @1.54 μm |
| Property | Value |
|---|---|
| Ground-state absorption cross-section GSA(10-19 cm2) | 2.8 (±0.4)@1340 nm |
| Excited state absorption cross-section ESA(10-20 cm2) | 2.0 (±0.6)@1340 nm |
| Ground-state absorption cross-section GSA(10-20 cm2) | 3.5 (±0.4) @1540 nm |
| Excited state absorption cross-section ESA(10-20 cm2) | 1.0 (±0.6) @1540 nm |
| Working wavelength | 1200 ~ 1600 nm |
| Damage Threshold | > 750 MW/cm2 |
Absorption and emission curves of Co:Spinel Crystal
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 Co:Spinel laser rod, please specify the specification listed above, for common application, we only need to know the main specification: initial transmission (T0), sizes, and coating. For special
request, please specify specification in details for evaluation and fabrication.
| Part Number | Face size | Initial Transmission @1064 nm | Coating |
|---|---|---|---|
| Co-Spinel-001 | 3.0*3.0 mm | T0=80%~95% | AR/AR@1535 nm |
| Co-Spinel-002 | 4.2x4.2*1.5 mm | T0=95% | AR/AR@1540 nm |
| Co-Spinel-003 | 5.0*5.0 mm | T0=80%~95% | AR/AR@1535 nm |
| Co-Spinel-004 | Ø6*1 mm | T0=90% | Uncoating |
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