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AgGaGe5Se12- AGGSe Crystal

POC-OC-122417-AgGaGe5Se12 Crystal

  • Broad transparency range: 0.6 – 16.5 µm.
  • Bandgap width: 2.2 eV for efficient nonlinear processes.
  • High laser damage threshold: 220 MW/cm² at 1.06 µm, 15 ns, 1 Hz.
  • Supports second-harmonic generation (SHG), sum-frequency generation (SFG), and optical parametric amplification (OPA).
  • Suitable replacement for AgGaS2 and AgGaSe2 in high-power laser applications.

Customizable Components Available for This Material to Meet Your Specific Needs!

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General Description

The AgGaGe5Se12 Crystal is a cutting-edge nonlinear optical material featuring a broad transmission range of 0.6 – 16.5 µm, making it ideal for mid-infrared (mid-IR) laser applications. With a high bandgap of 2.2 eV, this crystal demonstrates superior performance in frequency conversion processes such as SHG, SFG, and OPA. The laser damage threshold of 220 MW/cm² (1.06 µm, 15 ns, 1 Hz) ensures its durability under high-power operations. AgGaGe5Se12 offers enhanced properties over its predecessors, AgGaS2 and AgGaSe2, providing greater application flexibility for advanced laser systems

General Applications and Examples

  1. Nonlinear Frequency Conversion: AgGaGe5Se12 is a preferred crystal for frequency conversion processes such as SHG, SFG, and OPA. Its wide transparency range enables efficient operation in the 3 – 5 µm and 8 – 14 µm spectral regions, critical for mid-IR laser applications.
  2. Infrared Laser Systems: Ideal for Nd:YAG (1.06 µm) and Ti:Sapphire (0.8 µm) laser-pumped systems, AgGaGe5Se12 supports high-power output in the mid-IR spectrum, making it suitable for spectroscopy, remote sensing, and laser-based material processing.
  3. Medical and Diagnostic Applications: With its mid-IR transparency, this crystal facilitates precise laser surgical tools and advanced imaging technologies for medical diagnostics.
  4. Environmental Monitoring: The broad wavelength range supports infrared spectroscopy for atmospheric monitoring and pollutant detection.
  5. Replacement in Laser Systems: AgGaGe5Se12 serves as a versatile replacement for AgGaS2 and AgGaSe2 in laser systems, offering improved damage thresholds and a broader transparency range.

Chemical and Structural Properties

PropertyValue
Chemical FormulaAgGaGe5Se12
Crystal StructureOrthorhombic
Lattice Parametersa = 1.065 nm, b = 0.785 nm
Density5.4 g/cm³
Bandgap Width2.2 eV
Mohs Hardness2.8
Thermal Conductivity0.45 W/(m·K)
Melting Point825 °C

Optical and Nonlinear Optical Properties

PropertyValue
Transparency Range0.6 – 16.5 µm
Nonlinear Coefficientsd31 = 15 pm/V
Refractive Indicesn0 = 2.48, ne = 2.66
Laser Damage Threshold220 MW/cm² (1.06 µm, 15 ns)

Standard Fabriction Specification

SpecificationValue
Orientation Tolerance±0.5°
Clear Aperture>90%
Surface Flatnessλ/6 @ 633 nm
Surface Quality (Scratch/Dig)40-20
Parallelism<30 arc seconds
Perpendicularity<10 arc minutes
Clear Aperture Deviation±0.1 mm
Length Tolerance±0.1 mm (1 – 10 mm length)
±0.5 mm (>10 mm length)

Spectrum Transmission Curve

(Spectrum transmission curves for AgGaGe5Se12 Crystal can be provided upon request, showcasing its high transmission efficiency across the 0.6 – 16.5 µm range.)

POC-AgGaGe5Se12 Crystal Spectrum Transmission Curve

Coating Specification

  • Anti-Reflective Coating (AR): Optimized for mid-IR wavelengths, reducing reflectance to <0.2%.
  • Customized Coatings: Other coatings (e.g., BBAR, HR) are available upon request for specialized applications.
  • Adhesion Test: Compliant with MIL-C-675C military standards, an adhesion test involved applying a tape that meets LT-90 specifications onto the lens film layer. The tape was affixed fully and then removed vertically. This procedure was performed three times, resulting in no blistering or peeling.
  • Temperature Test: In line with MIL-C-675C specifications, test pieces were subjected to temperatures of -62±1℃ and 71±1℃. After maintaining them at room temperature (16℃~32℃) for two hours, the adhesion test was repeated, confirming no film detachment.
  • Abrasion Resistance Test: Conforming to MIL-C-675C and CCC-C-440 standards, the abrasion resistance test involved a gauze tester applying a minimum force of 1.0 lbs (0.45 kg) to the film. This was repeated 25 times with gauze widths of 1/4 inch (6.4mm) and 3/8 inch (9.5mm), ensuring no damage occurred to the film surface.
  • Humidity Test: Under MIL-C-675C criteria, the test piece was placed in a controlled temperature and humidity chamber set to 49 ±2℃ and 95%~100% humidity for 24 hours. The film remained intact, with no peeling, scratches, or other defects.
  • Solvent and Cleaning Testing: Following MIL-C-675C specifications, test pieces were exposed to room temperature conditions (16℃~32℃) and tested with acetone and alcohol for at least 10 minutes each. After air drying and subsequent cleaning with a cotton cloth soaked in alcohol, the film surface showed no signs of peeling or scratches.
  • Salt Spray Test: After 100 hours in a 35°C environment with a 5% saltwater concentration, the film showed no signs of damage.
Product CodeDimensions (mm)Coating TypeApplicationPrice (USD)
AGGS-1010-AR10 × 10 × 2AR CoatingMid-IR Laser SystemsRequest
AGGS-2020-AR20 × 20 × 5AR CoatingHigh-Power ApplicationsRequest
CustomCustom SizesCustomizedTailored for Specific NeedsRequest

POC-OC-122417-AgGaGe5Se12 Crystal

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