Nonlinear optical crystal LISe (LilnSe2)

LISe

(lithium indium selenide)

common2

LISe a

Main properties

Compound LilnSe2
Transparency range, µm 0.43– 13.2 
Nonlinear coefficient, pm/V d31=11.78, d24=8.17 @2.3 µm 
Symmetry Orthorhombic, mm2 point group 
Cell parameters, Å a=7.192, b=8.412, c=6.793 
Band gap, eV 2.86
Typical
Reflection
index
10.0 µm
5.0 µm

nx=2.2015, ny=2.2522, nz=2.2566 
nx=2.2370, ny=2.2772, nz=2.2818

The fundamental wavelength ranges in µm for SHG x-y, Type II, eoe 2.73 – 8.24

x-z, Type I, ooe

2.08 – 12.4

y-z, Type II, oeo

2.73 – 3.07

y-z Type II, oeo

7.66 – 8.24

Total interval covered

2.08 – 12.4

Optical Damage Threshold, GW/cm2 1064 nm
(t=10 ns)

~40 

Thermal conductivity k, WM/M°C kx=4.73 ± 0.3; ky=4.67 ± 0.3; kz=5.45 ± 0.3
Band-gap energy at room temperature, eV Eg = 2.73
Absorption edge in the far-IR on 0.2 transparency level 1.24 THz at 240 µm

The parameters of optical elements

Orientation accuracy, arc min < 30
Parallelism, arc sec < 30
Flatness 546 nm λ/4
Surface quality, scratch/dig 30/20

Application

  • Optical parametric oscillation (OPO) in range 1 – 13 µm with pump Ti: Sapphire laser
  • Different frequency generation in middle IR range (2-13 µm)
  • For all crystals we are able to provide suitable Anti-reflection / Protective Coatings tailored to customer’s specific applications, providing reflectivity curves.

We are able to provide suitable Anti-reflection / Protective, etc. coatings tailored to customer’s specifications, reflectivity curves are applied upon request.

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