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
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
λ/10@632.8nm
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