AgGaGe5Se12

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AgGaGe5Se12 (AGGSe, Selenium-Germanium-Gallium-Silver) crystals have these characteristics:

  • A large band gap
  • A large laser damage resistance threshold (225 MW/cm2)
  • About three times that of AgGaS2
  • A large nonlinear coefficient (d31=30 pm/V)
  • A wide transmission band (0.6~16.5 μm)

They are expected to be used in mature 1.064 μm Nd:YAG lasers pumped to output larger power mid- and far-infrared lasers. They can also be used for 1μm source pumped OPO laser output, CO2 laser SHG tuning.

Features of AgGaGe5Se12 Crystals:

  • High damage threshold
  • Large band gap
  • More phase matching schemes
  • Can be a substitute for AgGaS2 and AgGaSe2
  • Wide infrared transmission range
  • Large nonlinear coefficient
  • Large laser damage threshold
  • Good mechanical performance, not easy to break

Material Specifications

Size Tolerance(W+/-0.1mm)×(h+/-0.1mm)×(L+1mm/-0.5mm)
Clear Aperture>90%
Flatnessλ/8@633nm when T>=1mm
Surface QualityAfter Coating60-40scratch/dig
Parallelism>30’’
Perpendicularity10’
Directional Accuracy<30°

Physicochemical Properties

Crystal StructureOrthonormal System Fdd2 Space Group
Lattice Constanta=1.2422nm,
b=2.3767nm,
c=0.7136nm
Cell Volume2.105nm3
Density4.6947g/cm3
Melting Point713-731℃
Band Gap2.2eV
Nonlinearity Coefficientd31=30pm/V
Pervious to Light Range0.63-16μm
Absorption Coefficient0.1cm-1
Damage Threshold225MW/cm2
Birefringence0.16

Spectrum

AgGaGe5Se12 nonlinear crystal transmittance curve CRYLINK
Transmittance Curve

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