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Co Spinel Single Crystals Q Switching Technique Various Applications

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Co Spinel Single Crystals Q Switching Technique Various Applications

Place of Origin : China

Brand Name : CRYLINK

Certification : Iso9001

MOQ : 1 Pieces

Price : negotiation

Packaging Details : Carton

Delivery Time : 3-4 weeks

Payment Terms : TT

Supply Ability : 100 pieces /month

Model Number : CRYLINK-Co Spinel Crystal

Name : Co:Spinel

Chemical formula : Co2+:MgAl2O4

Crystal structure : Cubic

Lattice parameters : 8.07

Density : 3.62 g/cm3

Melting Point : 2105°C

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Cobalt-doped magnesium aluminate spinel (Co:MgAl2O4) allow the generation of short nanosecond pulse with high peak power around the eye-safe wavelength of 1.5um,perfect for telemetry applications. The absorption spectrum of Co2+-doped MgAl2O4 exhibited a broad absorption band in the wavelength range of 12001600 nm, which indicated that Co2+ ions substituted for the tetrahedrally coordinated Mg2+ ions in the MgAl2O4 lattice. Passive Q-switching of solid-state lasers with solid-state saturable absorbers is a very attractive Q-switching technique because it allows to develop compact and low cost laser sources of nano and sub nanosecond pulses far various applications

Co spinel——saturable absorbers for the passive Q-switching of solid-state lasers operating at eye-safe wavelength of 1.5 m

Lasers emitting at 1.5m are of great interest for several industrial applications. This interest is, rst of all, due to eye-safety of 1.5-m radiation. Other advantages of this wavelength are high transparency in atmosphere and fused-silica wave guides and availability of sensitive room temperature light detectors(Ge and InGaAs photo diodes).All this makes 1.5m lasers very attractive for applications in range-finder, environmental sensing, telecommunications, surgery,etc. Co:Spinel absorption peak is close to 1520nm,which is most used in eye-safe laser. The absorption cross-section at 1520nm is 3.5×10-19cm2 and at 1331 is 2.8×10-19cm2,it has reported as Q-switch crystal for Er,Yb Glass and Nd:GYSGG,Nd:YALO3.

Physical and Chemical Properties

Property Value
Chemical formula Co2+:MgAl2O4
Crystal structure Cubic
Lattice parameters 8.07
Density 3.62 g/cm3
Melting Point 2105°C
Refractive Index n=1.6948 @1.54 m
Thermal Conductivity/(Wcm-1K-1@25°C) 0.033W
Thermal Expansion /(10-6 /°C@25°C ) 1.046
Specific Heat/ (Jg-1K-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
Doping concentration of Co2+ 0.01-0.3 atm%

Metarial and Specifications

Property Value
Concentrations (0.05~0.35) wt%
Absorption coefficient 07 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
End Configuration Flat/Flat
Figure of Merit(FOM) 100~300

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