Chromium-doped alexandrite is a tunable solid-state laser material for the 710–800 nm region. Its energy storage and thermal shock resistance support pulsed systems used in spectroscopy, lidar and medical equipment.
Properties, applications and specifications
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
Applications Medical, Cosmetic, Spectroscopy, Industrial Ordering Options and Specifications.
Specifications
|
Dopant concentration
|
Cr:0.13at% (0.10%~0.20%)
|
|
Orientation
|
within 5°
|
|
Wavefront Distortion
|
≤0.25λ/inch
|
|
Extinction
|
≥25dB
|
|
Rod Sizes
|
Diameter: 2~12.7mm, length: 5~150mm Upon request of customer
|
|
Dimensional Tolerances
|
Diameter: +0.00/-0.05mm, length:±0.5mm
|
|
Barrel Finish
|
Ground Finish with 400# grit or polished
|
|
Parallelism
|
≤30”
|
|
Perpendicularity
|
≤5’
|
|
Flatness
|
|
|
Surface Quality
|
10-5(MIL-O-13830A)
|
|
Chamfer
|
0.15±0.05mm
|
|
AR Coating Reflectivity
|
≤0.25%(@755nm)
|
|
Damage Threshold
|
500MW/cm210ns 1Hz at 755nm
|
Main Properties of ALEX crystal:
|
Chemical 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
|
Standard Products
|
Part No
|
Diameter(mm)
|
Length(mm)
|
Doping
|
Coating
|
|
ALEX-8100
|
8
|
130
|
0.13%
|
HR/PR755 nm
|
|
ALEX-7110
|
7
|
120
|
0.13%
|
AR/AR755 nm
|
|
ALEX 10127
|
6.35
|
120
|
0.13%
|
AR/AR755 nm
|
