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Alexandrite rod

Alexandrite (Cr3+:BeAl2O4, chromium-doped beryllium aluminate) is a laser gain material used in solid-state lasers for applications such as dermatology and Lidar, etc. Alexandrite is produced via the Czochralski growth method. It has a thermal shock resistance five times that of Nd:YAG and a wide emission wavelengths typically between 710nm and 800nm – in many cases around 755nm. It is possible to make broadly wavelength-tunable lasers based on alexandrite. Alexandrite is anisotropic, the absorption and gain properties strongly depend on the direction of pump light’s polarization. This together with the strong birefringence of the material makes it easy to obtain linearly polarized emission with low depolarization losses. Keywords: Alexandrite rod,Alexandrite crystal,755nm alexandrite,Alexandrite laser crystal,Alex rod.

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Product Description

Alexandrite (Cr³⁺:BeAl₂O₄, chromium-doped beryllium aluminate) is a laser gain material used in solid-state lasers for applications such as dermatology and Lidar, etc. Alexandrite is produced via the Czochralski growth method. It has a thermal shock resistance five times that of Nd:YAG and a wide emission wavelengths typically between 710nm and 800nm – in many cases around 755nm.

It is possible to make broadly wavelength-tunable lasers based on alexandrite. Alexandrite is anisotropic, the absorption and gain properties strongly depend on the direction of pump light’s polarization. This together with the strong birefringence of the material makes it easy to obtain linearly polarized emission with low depolarization losses.

Material Properties

Formula:	Cr³⁺:BeAl₂O₄
Crystal Structure:	Orthorhombic
Unit Cell Dimensions (Å)	5.476(a) x 9.404(b) x 4.427(c)
Thermal Expansion (x 10^-6 K^-1):	5.9(a), 6.1(b), 6.7(c)
Index of Refraction (at 750 nm):	1.7367(a) x 1.7241(b) x 1.7346(c)
Melting Point:	1870 °C
Mohs Hardness:	8.5
Density:	3.7 g/cm³
Thermal Conductivity:	0.23 W/cm•K
Young's Modulus:	469 GPa
Thermal Shock Resistance:	35 - 74W/cm
dn/dT:	8x10^-6K^-1

Absorption Curve

Applications

● Laser Medical Devices for Long Pulse , Q-switch or Picosecond 755nm Lasers

● Dermatology

● Lithotripsy

● Spectroscopy

● Atmospheric lidar etc.

Advantages

● Low threshold, High efficiency

● High damalge threshold

● Excellent quality, Competitive price, Fast delivery

Specifications

Dimension Tolerance	D(+0/-0.05) * L(+1/-0) mm
Scratch/Dig	10/5	Perpendicularity	<5'
Parallelism	<30"	Chips	<0.1mm
Flatness	λ/10@633nm	Clear Aperture	≥98%
Coating	Option 1- Normal : AR/AR755nm Option 2 -Mirror coating: HR755nm / PR755nm
Damage Threshold	> 1.5 Million pulses ( tested by third party)
Standard Products	Dia5x115mm, Dia7x110mm, Dia7x120mm Dia6.35x120mm, Dia8x130mm, Dia9.53x117mm

Key words:

alexandrite

755nm

alexandrite rod

cr3+:beal2o4

chromium-doped beryllium aluminate

hair removal

alexandrite crystal

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Established in 2001 and located in the city of Qingdao, China. Crystech Inc. is a global supplier of Alexandrite, KTP, RTP and E-O Q-Switch, YAG crystals, Laser Optics and more.

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