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Innovative Nonlinear Optical Material for IR Applications

Nonlinear crystal AgGaS₂

Key Advantages of AgGaS₂

AgGaS₂ (silver gallium sulfide, AGS) is a highly efficient nonlinear optical crystal that leads the market in infrared optics. This material is widely recognized for its superior performance in modern optical systems due to its exceptional characteristics.

Application Areas

  • Second Harmonic Generation for CO₂ lasers
  • Parametric Generation across a broad spectral range
  • Frequency Mixing for specialized radiation sources
  • Nonlinear Optical Processes in scientific research

Nonlinear Crystal AgGaS₂ (AGS)


1. Structural and Physical Properties

  • Crystal Symmetry: tetragonal, D₂d
  • Unit Cell Parameters:
  • a = 5.742 Å
  • c = 10.305 Å
  • Physical Characteristics:
  • melting point: 980 °C
  • density: 4.58 g/cm³
  • optical homogeneity: Δn < 1×10⁻⁴
  • absorption coefficient: <0.005 cm⁻¹

2. Optical Properties

  • Spectral Range: 0.47–12.5 μm
  • Bandgap Width: 2.8 eV
  • Isotropic Wavelength: 0.497 μm
  • Refractive Indices (according to the Sellmeier equation):
  • for no: n = 4.4368659 + 541.97177/(400.0 + λ²) − 0.21334425/(0.10173910 − λ²)
  • for ne: n = 4.1704137 + 550.23080/(400.0 + λ²) − 0.19289371/(0.13312863 − λ²)

3. Nonlinear Optical Characteristics

  • Nonlinear Coefficient:
  • d₃₆(10.6 μm) = 13.4 pm/V
  • ratio: d₃₆(AGS) = 0.15d₃₆(GaAs)
  • Conversion Efficiency:
  • 2.8% at λ = 5.2 μm
  • 1.6% at λ = 6.3 μm
  • 0.6% at λ = 7.1 μm

4. Threshold Characteristics

  • Laser Damage Threshold:
  • 20 MW/cm² at λ = 1.064 μm (τ = 10 ns)
  • Refractive Indices for different wavelengths:
  • λ = 0.53 μm: no = 2.6418, ne = 2.6145
  • λ = 0.65 μm: no = 2.5417, ne = 2.4941
  • λ = 1.06 μm: no = 2.4489, ne = 2.3952
  • λ = 2.0 μm: no = 2.4131, ne = 2.3594
  • λ = 10.6 μm: no = 2.3449, ne = 2.2908

5. Applications

  • Main Functions:
  • frequency doubling
  • three-frequency mixing
  • parametric generation
  • OPO Parameters (Optical Parametric Oscillator):
  • tuning range: 1.0–12 μm
  • pulse duration: 30 ps
  • pump wavelength: 1.064 μm
  • output wavelength: 4–10 μm

6. Advantages of Use

  • Technological Features:
  • high quality of nonlinear elements
  • possibility of achieving high conversion efficiency
  • implementation of a two-pass OPO on a single crystal
  • maintenance of conversion efficiency in two-pass mode

AgGaS₂ Crystal: High-Performance Nonlinear Optical Material for IR Applications

HTL provides premium-quality AgGaS₂ crystals that offer:

  • Outstanding Transparency in the IR range
  • High Efficiency in frequency conversion
  • Stable Performance under high power conditions
  • Reliable Operation in various environments

Technical Advantages

  • Broad Spectral Transmission range
  • Optimal Nonlinear Characteristics
  • Minimal Optical Absorption

Solutions for Your Business

HTL offers:

  • Customized solutions tailored to specific requirements
  • Professional consultation on application
  • Quality guarantee for every crystal
  • Technical support throughout the usage period

Why Choose AgGaS₂ from HTL?

Order AgGaS₂ Now!

Don’t miss the opportunity to enhance your optical systems with cutting-edge technology. Contact us to:

  • Receive a detailed consultation
  • Place an order
  • Learn about special delivery terms

Choose a reliable partner in the world of nonlinear optics — choose HTL!

List of Scientific Publications on AgGaS₂


  1. E. A. Pobedimskaya, L. L. Alimova, N. V. Belov, V. V. Badikov
  2. Crystal structure of silver germanogallium sulfide and GeS₂
  3. Sov. Phys. Dokl. 26(3), 259−260 (1981)
  4. V. V. Badikov, A. G. Tyulyupa, G. Shevyrdyaeva, S. G. Sheina
  5. Solid solutions in the AgGaS₂ - GeS₂ and AgGaSe₂ - GeSe₂ systems
  6. Inorg. Mater. 27(2), 177−180 (1991)
  7. V. Badikov, G. Shevyrdyaeva, V. Panyutin, V. Petrov, F. Noack
  8. Phase-matched second harmonic generation at 1064 nm in quaternary crystals of silver thiogermanogallate
  9. CLEO 2005, Baltimore (MD), USA (2005)
  10. V. Badikov, G. Shevyrdyaeva, V. Chizhikov, V. Panyutin, V. G. Xu, V. Petrov, F. Noack
  11. Phase-matched second harmonic generation at 1064 nm
  12. Appl. Phys. Lett. 87(24), 2 411 137−3 (2005)
  13. V. Petrov, V. Badikov, G. Shevyrdyaeva, V. Panyutin, V. Chizhikov
  14. Phase matching properties and optical parametric amplification in single crystals of AgGaGeS₄
  15. Opt. Mat. 26(3), 217−222 (2004)
  16. Valeriy Badikov, Konstantin Mitin, Frank Noack, Vladimir Panyutin, Valentin Petrov, Alexander Seryogin, Galina Shevyrdyaeva
  17. Orthorhombic nonlinear crystals of AgₓGaxGe₁₋ₓSe₂
  18. Opt. Mater. (2008)
  19. D. B. Kolker et al.
  20. Tunable mid-IR laser source for opto-acoustic spectroscopy
  21. Quantum Electronics, 49, No. 1 (2019)
  22. S. A. Andreev, N. P. Andreeva, V. V. Badikov, I. N. Matveev, S. M. Pshenichnikov
  23. Frequency up-conversion in crystals of the CdxHg₁₋ₓGa₂S₄ type
  24. Proceedings of the All Union Conference on Coherent and Nonlinear Optics (1980)
  25. V. V. Badikov, I. N. Matveev, V. L. Panyutin, S. M. Pshenichnikov, O. V. Rychik, N. K. Trotsenko, N. D. Ustinov
  26. Growth and optical properties of mercury thiogallate
  27. Sov. J. Quantum Electron. 9(8), 1068−1069 (1979)
  28. P. P. Geiko, Yu. M. Andreev, V. V. Badikov
  29. CO₂-laser second harmonic generation in HgGa₂S₄
  30. Russ. Phys. J. 46(9), 947−949 (2003)
  31. Yu. M. Andreev, P. P. Geiko, V. V. Badikov et al.
  32. Non-linear optical properties of defect tetrahedral crystals
  33. Nonl. Opt. 29(1), 19−27 (2002)
  34. V. Petrov, V. Badikov, V. Panyutin, G. Shevyrdyaeva, S. Sheina, F. Rotermund
  35. Mid-IR optical parametric amplification with femtosecond pumping
  36. Opt. Commun. 235(1−3), 219−226 (2004)
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