Ruby (694 nm)

Ruby

Structural & Thermal Properties

Absorption Spectrum


Datasheet

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Formula:​ Cr3+: Al2O3
​Crystal System: Trigonal
​Unit Cell Dimensions (as if hexagonal) a = 4.785 Å c = 12.99 Å
X-Ray Density:​ 3.98 g/cm3
​Melting Point: 2040°C
​Thermal Expansion: at 323 K: ┴ c 5 x 10-6 K-1
|| c 6.7 x 10-6 K-1
Thermal Conductivity: 300K​: 28 W / m•K
Hardness:​ Mohs: 9, Knoop: 2000 kg mm-2
​Young's Modulus: 345 GPa
Specific Heat: at 291K: 761 J kg-1 K-1
Thermal Stress Resistance parameter, RT: 34 W / cm
General Specifications
​   Diameter Tolerance:   +0.000" / -0.002"​
​​Chamfer: 0.005" ± 0.003" @ 45°​
​Barrel Finish: 30 ± 5 μinches
Perpendicularity:​ within 5 arc minutes​
​Parallelism: 30 arc-seconds or less​
​Rod End Face Flatness: within λ / 10 wave at 632 nm wavelength​
​Surface Quality: ​10 - 5 scratch-dig per MIL-O-13830 A​
​Wave Front Distortion:
less than 1/2 wave per inch of length
(measured at 1 micron)​
​Standard Coating: Anti-Reflection where R < 0.25% @ 694 nm​
Laser rod orientation: 60 ± 5° from the c-axis​

More Information

Rod Lengths: 3 mm -152.4 mm
Rod Diameters
: 2 mm - 12.7 mm