Co: Spinel | Laser Crystal | Stanford Advanced Materials

Catalog No.	CY3706
Material	Co: MgAl2O4
Density	3.62 g/cm3
Melting Point	1870 ℃
Refractive Index	n=1.6948 @1.54 μm

Catalog No.

CY3706

Material

Co: MgAl2O4

Density

3.62 g/cm3

Melting Point

1870 ℃

Refractive Index

n=1.6948 @1.54 μm

Co: Spinel Description

Co: Spinel allows the generation of short nanosecond pulses with peak power near an eye-safe wavelength of 1.5um, making it ideal for telemetry applications. Co²⁺ doped MgAl₂O₄ has a wide absorption spectrum in the wavelength range of 1200 ~ 1600nm, indicating that Co²⁺ ions replace the tetrahedral coordination of Mg²⁺ ions in the lattice of MgAl₂O₄. Passive Q-switching of solid-state saturable absorber lasers is a very attractive q-switching technology because it can lead to the development of compact, low-cost nanosecond and nanosecond pulsed laser sources with a wide range of applications.

Co: Spinel Specifications

Physical and Chemical Properties

The crystal structure	cubic
The 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
Co2 + doping concentration	0.01-0.3 atm%

Material specification

Concentration	(0.05~0.35) wt%
Absorption coefficient	0 ～ 7 cm^-1
Ground state absorption cross section GSA (E-19 cm²)	2.8(±0.4) @1340nm
Excited state absorption cross section ESA (E-20 cm²)	2.0(±0.6) @1340nm
Ground state absorption cross section GSA (E-20 cm²)	3.5(±0.4) @1540nm
Excited state absorption cross section ESA (E-20 cm²)	1.0(±0.6) @1540nm
Working wavelength	1200 – 1600 nm
The final configuration	Flat/Flat
Quality Factor (FOM)	100~300
Coating	AR/AR@1540, R<0.2%;
Coating	AR/AR@1340, R<0.2%