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 |