GaSe (Gallium selenide) – Laser Crystal – Nonlinear Crystal – Customized Products

Product ID: 6673


GaSe (Gallium selenide) – Laser Crystal – Nonlinear Crystal – Customized Products

GaSe crystals are a nonlinear optical material with high damage broadening resistance, a large nonlinear coefficient (54 pm/V), a transmission band between 0.65 and 18 μm, and an ultra-low absorption coefficient, which makes them very important for mid-infrared broadband electromagnetic wave oscillations.GaSe crystals have achieved applications in: SHG of CO2 lasers, conversion of CO2 laser radiation conversion to visible or near-infrared wavelengths, mixing studies in the mid-wave infrared, OPG light generation in the 3.5-18 μm range, and efficient terahertz generation in the 0.2-5 THz range during femtosecond pulse pumping.

$100 is a deposit, not the final price of the product. Please contact us for price if needed.

Large nonlinear coefficient
High damage threshold
Wide transmission range
Ultra low absorption coefficient
Broadband terahertz oscillation
SHG conversion efficiency of CO2 laser reaches 9%

Product Parameters

Material GaSe
Transparency range, µm 0.62 – 20
Nonlinear Coefficient, pm/V d22 = 54 @10.6 µm
Crystal System Hexagonal system, point group 6m2
Lattice Constant, Å a=3.74, c=15.89
Refractive Index no=2.6975, ne=2.3745 @10.6 µm
no=2.7233, ne=2.3966 @5.3 µm
Damage Threshold, MW/cm2@1064 nm (t=10 ns) 30
Walk-off Angle 4.1° @5.3 µm
Mohs Hardness 2
Density 5.03g/cm3
Forbidden Bandwidth (300K) 2.2eV



TaorLab laser crystals

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