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Cr:Al2O3

CRYLINK’s Cr:Al2O3 crystal products, also known as Ruby. It is a kind of laser crystal product with excellent comprehensive performance. It is widely used in optics and solid-state lasers. The product has the characteristics of high hardness and obvious dichroism. Can be used in optical glass, watch parts, ruby laser products.

Product Parameters

Chemical Formula

Cr3+:Al2O3

Crystal Structure

Hexagonal

Lattice Constant(Å)

a = 4.748; c = 12.957

Crystal System

Trigonal

Axial Characteristics

Uniaxial

Growth Method

CZ

Melting Point

2040℃

Refractive Index

np = 1.759; n= 1.767

Double Refraction

0.0082

Density(g/cm3)

3.98

Mohs Hardness(mohs)

9

Specific Heat Capacity @18°C (Jkg-1K-1)

761

Thermal Conductivity@25°C (Wcm-1K-1)

Perpendicular to c-axis

0.35

Parallel to c-axis

0.33

Thermal Expansion Coefficient (20 – 100°C)

Perpendicular to c-axis

4.78×10-6 K-1

Parallel to c-axis

5.31×10-6 K-1

Tuning Range (nm)680 – 1100
Pumping Range (nm)450 – 532
Absorption Coefficient at 510 nm (cm-1)0.5 – 2.5
FOM>200
Orientation90° to c axis
Geometryflat-flat / Brewster
Parallelity10″
Flatness0.2
Orientation Tolerance< 5°
Broadband AR Coatings (%)< 0.2
Diameter (mm)(3 – 40) ± 0.1
Length (mm)(10 – 140) ± 0.5
Cr absorption spectrum of ruby 

Ruby, Cr absorption spectrum

 

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2025 Mid-Autumn Festival & National Day Holiday Notice

Hello everyone,

This is a quick update from all of us at Crylink regarding the upcoming holiday season.

Key Dates at a Glance:

  • Office Closed: From Oct 1 (Wed) to Oct 8 (Wed), 2025.

Our website remains operational during the holidays. You can browse our website and submit inquiry forms as usual, but please note that all new inquiries will be processed after we return on October 9th.

Wishing you a happy life and that everything goes smoothly!

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I am Ben Fang, the CEO of laser-crylink.com, me and my team would be happy to meet you and learn all about your business, requirements and expectations.