NIR-IR non-linear crystals

Nonlinear optical crystals LGSe (LiGaSe2)

LGSe

 common2

LGSe a

Main properties

Compound LiGaSe2
Transparency range, µm 0.37 – 13.2
Symmetry mm2
Band gap, eV (300K) 3.57
Nonlinear susceptibility, pm/V
(at 2.3 µm)
d31=9.9;
d24=7.7 @2,3 µm
Absorption edge in the far-IR on 0.2 transparency level µm 218
THz 1.37
Thermal conductivity k, WM/M°C 4.8-5.8 calc.
SHG cut off 1.57 - 11.72

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

LGSe is a very recently proposed IR new nonlinear materials with a wurtzite-type structure and UV transmission down to 0.38. OPO, OPA, DFG to obtain mid-IR Crystals of LiBC2 group are characterised by a set of important physical parameters, such as large band gap, low two photon absorption, wide transparency range, including THz window, low group velocity mismatch, high thermal conductivity, low anisotropy of thermal expansion coefficient, etc. which lead to effective use in tunable laser systems in wide spectral range.

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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Nonlinear optical crystals LGS (LiGaS2)

LGS

 common2

Li1

Main properties

Compound LiGaS2
Transparency range, µm 0.33 – 11.6
Symmetry mm2
Band gap, eV 4.15
Nonlinear susceptibility, pm/V
(at 2.3 µm)

d31=5.8;
d24=5.1;
d33= -10.7
Absorption edge in the far-IR on 0.2 transparency level µm 92
THz 3.25
Optical Damage Threshold, MW/cm2
1064 nm
(t=14 ns)

>240
Thermal conductivity k, WM/M°C 6-8 calc.
SHG cut off 1.47 - 7.53

The parameters of optical elements

Compound LiGaS2
Orientation accuracy, arc min < 30
Parallelism, arc sec < 30
Flatness 546 nm λ/4
Surface quality, scratch/dig 30/20

Application

LGS is a very recently proposed IR new nonlinear materials with a wurtzite-type structure and UV transmission down to 0.32. OPO, OPA, DFG to obtain mid-IR.
Crystals of LiBC2 group are characterised by a set of important physical parameters, such as large band gap, low two photon absorption, wide transparency range, including THz window, low group velocity mismatch, high thermal conductivity, low anisotropy of thermal expansion coefficient, etc. which lead to effective use in tunable laser systems in wide spectral range.

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

ORDER THIS PRODUCT

Order Request form

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Nonlinear optical crystal AGS (AgGaS2)

AGS

(silver thiogallate)

AGS1

AGS3

Main properties

Compound AgGaS2
Transparency range, µm 0.47 – 13
Nonlinear coefficient, pm/V d36 = 12.6 @ 10.6 µm 
Negative uniaxial crystal no > ne (at λ < 0.497 μm ne > no)
Symmetry Tetragonal, -42m point group
Cell parameters, Å a=5.757, c=10.311
Typical
Reflection
index

10.6 µm
5.3 µm
no=2.3475, ne=2.2918
no=2.3945, ne=2.3406
Optical Damage Threshold, MW/cm2
1064 nm
(t=10 ns)
350
Walk off angle, ° 5.3 µm 0.76
Thermal conductivity k, WM/M°C 1.5
Band-gap energy at room temperature, eV Eg = 2.73
Optical activity ρ = 522deg/mm at isotropic point n0= ne, λ = 0.4974 μm
Absorption edge in the far-IR on 0.2 transparency level 0.86 THz; 346 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

  • Efficient frequency doubling for mid-IR radiation
  • Optical parametric oscilation and amplification, Different frequency generation to mid-infrared regions up to 12 µm
  • Optical narrow-band filters in the region near isotropical point (0.4974 µm at 300 K)

Large/long optical elements are available, please, send your requests.

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

ORDER THIS PRODUCT

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Nonlinear optical crystal AGSe (AgGaSe2)

AGSe

(silver gallium selenide)

AGSe

Main properties

Compound AgGaSe2
Transparency range, µm 0.76 – 18
Negative uniaxial crystal no > ne (at λ < 0.804 μm ne > no)
Nonlinear coefficient, pm/V d36 = 39.5 @10,6 µm 
Symmetry Tetragonal, -42m point group
Typical
Reflection
index

10.6 µm
5.3 µm
no=2.5915, ne=2.5582 no=2.6138, ne=2.5811
Optical Damage Threshold, MW/cm2
2000 nm
(t=30 ns)
13
Walk off angle, ° 5.3 µm 0.68
Thermal conductivity k, WM/M°C 1.1
Band-gap energy, eV 1.8
Optical activity ρ = 7deg/mm at isotropic point, μm n0= ne, λ = 0.804

The parameters of optical elemets

Orientation accuracy, arc min < 30
Parallelism, arc sec < 40
Flatness 546 nm λ/4
Surface quality, scratch/dig   30/20

Application

  • Efficient frequency doubling for mid-IR radiation
  • Optical parametric oscilation and amplification, Different frequency generation to mid-infrared regions up to 17 µm
  • Optical narrow-band filters in the region near isotropical point (0.804 µm at 300 K)

Large/long optical elements are available, please, send your requests.

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

ORDER THIS PRODUCT

Order Request form

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Nonlinear optical crystal GaSe

GaSe

(gallium selenide)

Dscn0453

Main properties

Compound GaSe
Transparency range, µm 0.62 – 20
Nonlinear coefficient, pm/V d22 = 54 @10.6 µm
Symmetry hexagonal, 6m2 point group
Cell parameters, Å a=3.74, c=15.89
Typical
Reflection
index

10.6 µm
5.3 µm

no=2.6975, ne=2.3745
no=2.7233, ne=2.3966
Optical
Damage
Threshold, MW/cm2

1064 nm
(t=10 ns)
30
Walk-off angle, ° 5.3 µm 4.1

Application

  • SHG of 10.6 µm laser radiation
  • Optical Parametric Oscillation, Amplification, DFG, etc. to mid-IR up to 17 µm

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

ORDER THIS PRODUCT

Order Request form

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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.

ORDER THIS PRODUCT

Order Request form

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Nonlinear optical crystal LIS (LilnS2)

LIS

(lithium indium sulphide)

common2

LIS a

Main properties

Compound LiInS2
Transparency range, µm 0.35– 13.2 
Nonlinear coefficient, pm/V d31=7.25, d24=5.66 @2.3 
Symmetry Orthorombic, mm2 point group 
Cell parameters, Å a=6.893, b=8.0578, c=6.4816 
Typical
Reflection
index
1064 nm
532 nm

nx=2.1305, ny=2.1668, nz=2.1745
nx=2.2353, ny=2.2841, nz=2.2919

The fundamental wavelength ranges in µm for SHG x-y, Type II, eoe 2.35 – 6.11

x-z, Type I, ooe

1.78 – 8.22

y-z, Type II, oeo

2.35 – 2.67

y-z Type II, oeo

5.59 – 6.11

Total interval covered

1.617 – 8.71

Optical Damage Threshold, GW/cm2 1064 nm
(t=14 ns)

40 

Thermal conductivity k, WM/M°C kx=6.1 ± 0.3; ky=5.9 ± 0.3; kz=7.4 ± 0.3
Absorption edge in the far-IR on 0.2 transparency level

2.58 THz at 118 µm

The parameters of optical elements

Orientation accuracy, arc min < 30
Parallelism, arc sec < 30
Flatness 546 nm λ/6
Surface quality, scratch/dig 30/20

Application

  • Optical parametric oscilation (OPO) in range 1 – 12 µm with pump Ti: Sapphire laser
  • Different frequency generation in middle IR range (2-12 µm)

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

ORDER THIS PRODUCT

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