Co:MgAl₂O₄

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The Co²⁺-doped magnesium aluminate spinel (Co:MgAl₂O₄) crystal is an efficient saturable absorber that can be used in 1.5μm eye-safe solid-state lasers and is an effective material for passive Q-switched solid-state lasers operating in the near-infrared region. The high-peak-power pulsed laser generated through its passive Q-switching effect can achieve high-power 1.5μm pulsed laser output. It has characteristics such as low harm to human eyes, strong penetration ability, low transmission loss, and strong optoelectronic countermeasure ability. It operates at wavelengths ranging from 1200 to 1600nm and is especially suitable for the 1540nm Er:glass laser which is eye-safe. It can be widely applied in fields such as free-space optical communication, rapid battlefield ranging, and lidar for unmanned equipment.

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Product Features & Applications Physical & Optical Properties Product Specifications Standard Products

Product Applications:

laser communication

laser ranging

Laser radar

Product Features：

Stable photochemical properties

good thermal conductivity

low saturation light intensity

high damage threshold

Chemical formula	Co:MgAl₂O₄
Crystal structure	cubic crystal system
Lattice parameters	8.07Å
Density	3.62 g/cm3
Melting point	2105°C
Refractive index	n=1.6948 @1.54 μm
Thermal conductivity / (W·cm⁻¹·K⁻¹ @ 25°C)	0.033W
Thermal expansion / (10⁻⁶ / °C @ 25°C)	1.046
Specific heat / (J·g⁻¹·K⁻¹)	5.9
Hardness (Mohs)	8.2
Extinction ratio	25dB
Orientation	[100] or [111] < ±0.5°
Optical density	0.1-0.9
Damage threshold	>500 MW/cm2

Concentration	(0.05-0.35)wt%
Absorption Coefficient	0-7
Ground State Absorption Cross Section	2.8(±0.4)@1340nm
Excited State Absorption Cross Section	2.0(±0.6)@1340nm
Ground State Absorption Cross Section	3.5(±0.4)@1340nm
Excited State Absorption Cross Section	1.0(±0.6)@1340nm
Operating Wavelength	1200-1600nm
Terminal Configuration	Flat/Flat
Figure of Merit（FOM）	100-300
Coating	AR/AR@1540,R<0.2%