| Applications | ◆Generate 1.03µm laser output pumped at 0.94µm | |||
| ◆Can be used in high power diode-pumped lasers and others potential applications. | ||||
| Features | ◇Ideal for diode pumping; | |||
| ◇Very low frictional heating, less than 11% | ||||
| ◇Very high slope efficiency | ||||
| ◇Broad absorption bands, about 8nm@940nm | ||||
| ◇No excited-state absorption or up-conversion | ||||
| ◇Conveniently pumped by reliable InGaAs diodes at 940nm(or 970nm) | ||||
| ◇High thermal conductivity and large mechanical strength | ||||
| ◇High optical quality | ||||
| Main Specification | Yb-dopant concentration | 0.2%---30% at% (Tolerance 10% of concentration) | ||
| Diameter | 20 mm (+0.0/ -0.025mm) | |||
| Length | 1~70mm, (+/-0.05mm) | |||
| Dimensional Tolerance | +0/-0.05 mm Length ±0.1 mm | |||
| Rod size | Diameter 2~20mm, Length 5~150mm Upon request of customer |
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| Coating | a) AR @ 940nm or HR @940nm b) AR @ 1053nm or AR @1030nm or HR @1053nm |
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| Barrel finish | Ground Finish: 400# Grit | |||
| Orientation | [111] | |||
| Wavefront Distortion | <λ/10 per inch at 632.8nm for <7mm | |||
| Surface quality Scratch/Dig | 10-5(MIL-PRF-13830B) | |||
| Parallelism | < 10 arc sec | |||
| Perpendicularity | < 5 arc min | |||
| Surface flatness | <λ/10 at 632.8nm | |||
| Clear aperture | Central 95% | |||
| Chamfer | 0.15×45° | |||
| Physical and Chemical Properties | Chemical Formula | Yb:Y3Al5O12 | ||
| Crystal Structure | Cubic | |||
| Lattice Constants | 12.01Ä | |||
| Melting Point | 1970°C | |||
| Density | 4.56 g/cm3 | |||
| Mohs Hardness | 8.5 | |||
| Refractive Index | 1.82 | |||
| Thermal Expansion Coefficient | 7.8×10-6 /K , [111], 0-250°C | |||
| Thermal Conductivity | 14 W.s /m /K @ 20°C | |||
| Optical properties | Lasing Wavelength | 1030 nm | ||
| Laser Transition | 2F5/2→2F7/2 | |||
| Photon Energy | 1.93×10-19J (@1030nm) | |||
| Scattering | 1.82 | |||
| Extinction Ratio | >=28 dB | |||
| Emission Cross Section | 2.0×10-20 cm2 | |||
| Fluorescent Lifetime | 1.2ms | |||
| Loss Coefficient | 0.003 cm-1 | |||
| Pump Wavelength | 940 nm | |||
| Absorption band at pump wavelength | 10 nm | |||
| Diode pump band | 940nm or 970nm | |||
| Emission Linewidth | 9nm | |||
| Thermal Optical Coefficient | 9×10-6/℃ | |||
| Single pass loss | ＜3×10-3 cm-1 | |||
