Alexandrite

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 appl ication 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 Product Information

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
Available Rod Lengths 3 mm - 152.4 mm Available Rod Diameters 2 mm - 12.7 mm
Applications Medical, Cosmetic, Spectroscopy, Industrial Ordering Options and Specifications.

 
Ordering Options and Specifications

%Cr Concentration                                                 0.13% (0.10% to 0.20% available)
Wavefront Distortion (per inch of rod length)          λ//2
End Face Parallelism                                            <30 arc seconds

Material Properties

Formula                                                            Be (Al1-xCrx)2O4
Crystal Structure                                                Orthorhombic
Unit Cell Dimensions (Å)                                   5.476(a) x 9.404(b) x 4.427(c) per ASTM 10-32
Thermal Expansion (x 10-6 °C-1)                       5.9(a) x 6.1(b) x 6.7(c)
Index of Refraction (at 750 nm)                        1.7367(a) x 1.7241(b) x 1.7346(c)
Melting Point                                                   1870°C
Vickers Hardness                                               2000 kg mm-2
Density                                                             3.7 g/cm3
Thermal Conductivity                                       0.23 W cm-1 K-1
Young's Modulus                                              469 GPa
Thermal Shock Resistance                               35-74 W/cm
dn/dT                                                               8 x 10-6 K-1