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Alexandrite Crystal | Cr3+:BeAl2O4 Crystal

HM2857

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Alexandrite (Cr3+:BeAl2O4) Crystal is a high-performance, wide-bandwidth tunable laser crystal with a wavelength range of 710-858 nm. It’s widely used in dermatology, laser precision processing, remote sensing, atmospheric lidar, and medical laser devices. HM is a professional supplier and manufacturer of high-quality Alexandrite Crystal, offering customized solutions and competitive prices.

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Data sheet

Density3.69 g/cm³
MaterialsCr3+:BeAl2O4 Crystal
Melting Piont1870 ℃

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Alexandrite(Cr3+:BeAl2O4) Crystal is extensively used in various fields, including dermatology, laser precision processing, remote sensing, atmospheric lidar, and medical lasers (mainly for long-pulse, Q-switched, and picosecond 755 nm lasers). The crystal features remarkable hardness, high thermal conductivity, and a high damage threshold, making it ideal for demanding applications. Its thermal shock resistance is outstanding, being five times higher than that of Nd:YAG crystals, ensuring long-term reliability and superior performance. Heeger Materials provides Alexandrite(Cr3+:BeAl2O4) Crystal for advanced applications.
Alexandrite Crystal | Cr3+:BeAl2O4 Crystal

Alexandrite Crystal Properties

Crystal StructureOrthorhombic
Space GroupPnma
Unit Cell Parameters (Å)a=5.476, b=9.404, c=4.427
Density3.69 g/cm³
Young's Modulus469 GPa
Fracture Stress0.457-0.948 GPa
Mohs Hardness8.5 Mohs
Melting Point1870 ℃
Thermal Conductivity23 W/m/K
Thermal Diffusivity5.9 (∥a), 6.1 (∥b), 6.7 (∥c) cm²/s
Thermal Shock Resistance35-74 W/cm
Refractive Index @750 nmna=1.736, nb=1.741, nc=1.734
Absorption Band400-700 nm
Emission Band710-900 nm
Emission Cross Section0.7×10⁻²⁰ cm²
Room Temperature Fluorescence Lifetime (τ)262 μs

Alexandrite Crystal Specifications

Standard Dimensions

Dia. 5x115 mm, 7x110 mm, 7x120 mm

Dia. 6.35x120 mm, 8x130 mm, 9.53x117 mm

Dimension ToleranceDiameter Tolerance: +0/-0.05 mm <br> Length Tolerance: +1/-0 mm
Clear ApertureCenter 98% Area
Surface Quality10/5 per MIL-PRF-13830B standard
Surface Flatness<λ/10 @ 633 nm
Parallelism<30″
Perpendicularity≤5′
CoatingStandard: AR/AR 755 nm <br> Mirror: HR 755 nm / PR 755 nm
Damage Threshold>1.5 million pulses, tested by a third party

Alexandrite Crystal Absorption and Emission Curve

Alexandrite Crystal Absorption and Emission Curve

Alexandrite Crystal Key Features

  • Anisotropic Properties: Alexandrite Crystal exhibits strong anisotropy, with its absorption and gain characteristics being highly dependent on the polarization direction of the pump light.
  • Wide Absorption Band: The crystal has a broad absorption band that covers most of the visible light spectrum, making it compatible with blue, green, yellow, and red laser pump sources.
  • Blue Light Pumping: When pumped by blue light, Alexandrite lasers offer a broader emission spectrum, making them suitable for ultra-precision material processing that requires wide-spectrum lasers.
  • Yellow/Red Light Pumping: Using yellow or red light as the pump source results in high quantum efficiency, leading to the potential for higher average power.
  • 532 nm Green Laser Pumping: The 532 nm green laser generated by Nd:YVO4 frequency doubling offers excellent beam quality and high output power, commonly used as the pump source for Alexandrite Kerr lens mode-locked lasers.、

Alexandrite Crystal Applications

  • Laser Precision Processing: Used for high-precision cutting, drilling, and marking due to its tunable wavelength.
  • Medical Lasers: Ideal for dermatology and laser surgery, especially with 755 nm picosecond lasers.
  • Remote Sensing: Enables sensitive detection in atmospheric lidar systems with tunable wavelengths.
  • Laser Spectroscopy: Perfect for scientific measurements with its broad emission spectrum.
  • Pulse Laser Generation: Powers mode-locked lasers for high peak power and fast pulse rates in research.

Alexandrite Crystal Packing And Shipping

Alexandrite(Cr3+:BeAl2O4) Crystal will be securely packaged in sturdy containers with cushioning materials to prevent movement or damage during shipping. This careful packaging ensures that the product arrives in perfect condition, maintaining its high-quality standards throughout the delivery process.

Alexandrite Crystal | Cr3+:BeAl2O4 Crystal Packing

Where to Buy Alexandrite Crystal in Bulk?

Heeger Materials Inc., a professional supplier and manufacturer of high-quality Laser Crystals products including Alexandrite(Cr3+:BeAl2O4) Crystal, leverages extensive expertise in supply and export to offer competitive prices. We provide customized solutions to meet specific requirements, ensuring exceptional quality and customer satisfaction.

Heeger Materials Inc. was established in 2016 in Colorado, USA. We specialize in premium-grade metals, alloys, ceramics, powders, and other materials catering to research, development, and large-scale industrial production in scientific and industrial sectors. 

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