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Alexandrite rod
Alexandrite is the leader of a class of tunable solid-state laser materials. Enhanced by several years of research and development, it features a broad wavelength tun ing range of 71 0 - 800 nm with the capability to store and efficiently extract multijoule pulses of energy. It is one of the most robust solid-state laser materials available with a thermal shock resistance five times that of Nd:YAG.
Alexandrite 's unique combination of properties offer application in such areas as dermatology, lithotripsy, spectrosocopy, atmospheric lidar, testing of fiber optics and photodetectors, materials processing , pumping of dye lasers, non-linear optics studies and annealing of semiconductors.
Alexandrite is a robust solid state material for lasers requiring high thermal shock resistance and high rep rates from 710nm - 800nm.
Because of these properties and high energy efficiency, alexandrite is commonly used in applications ranging from: dermatology, lithotripsy, materials processing, to spectroscopy.710-800 nm
Because of these properties and high energy efficiency, alexandrite is commonly used in applications ranging from: dermatology, lithotripsy, materials processing, to spectroscopy.710-800 nm
Applications Medical, Cosmetic, Spectroscopy, Industrial Ordering Options and Specifications.
Specifications
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Dopant concentration
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Cr:0.13at% (0.10%~0.20%)
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Orientation
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within 5°
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Wavefront Distortion
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≤0.25λ/inch
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Extinction
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≥25dB
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Rod Sizes
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Diameter: 2~12.7mm, length: 5~150mm Upon request of customer
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Dimensional Tolerances
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Diameter: +0.00/-0.05mm, length:±0.5mm
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Barrel Finish
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Ground Finish with 400# grit or polished
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Parallelism
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≤30”
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Perpendicularity
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≤5’
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Flatness
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λ/10@632.8nm
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Surface Quality
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10-5(MIL-O-13830A)
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Chamfer
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0.15±0.05mm
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AR Coating Reflectivity
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≤0.25%(@755nm)
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Damage Threshold
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500MW/cm210ns 1Hz at 755nm
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Main Properties of ALEX crystal:
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Chemical Formula
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Be (Al1-xCrx)2O4
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Crystal Structure
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Orthorhombic
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Unit Cell Dimensions(Å)
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5.476(a) x 9.404(b) x 4.427(c) per ASTM 10-32
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Thermal Expansion (x 10-6 °C-1)
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5.9(a) x 6.1(b) x 6.7(c)
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Index of Refraction (at 750 nm)
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1.7367(a) x 1.7241(b) x 1.7346(c)
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Melting Point
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1870°C
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Vickers Hardness
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2000 kg mm-2
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Density
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3.7 g/cm3
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Thermal Conductivity
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0.23 W cm-1 K-1
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Young's Modulus
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469 GPa
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Thermal Shock Resistance
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35-74 W/cm
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dn/dT
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8 x 10-6 K-1
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Standard Products
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Part No
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Diameter(mm)
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Length(mm)
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Doping
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Coating
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ALEX-8100
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8
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130
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0.13%
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HR/PR755 nm
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ALEX-7110
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7
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120
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0.13%
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AR/AR755 nm
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ALEX 10127
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6.35
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120
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0.13%
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AR/AR755 nm
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