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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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Material General Description of AgGaGe5Se12 Crystal

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 of AgGaGe5Se12 Crystal

  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

Property

Value

Chemical Formula

AgGaGe5Se12

Crystal Structure

Orthorhombic

Lattice Parameters

a = 1.065 nm, b = 0.785 nm

Density

5.4 g/cm³

Bandgap Width

2.2 eV

Mohs Hardness

2.8

Thermal Conductivity

0.45 W/(m·K)

Melting Point

825 °C

Optical and Nonlinear Optical Properties

Property

Value

Transparency Range

0.6 – 16.5 µm

Nonlinear Coefficients

d31 = 15 pm/V

Refractive Indices

n0 = 2.48, ne = 2.66

Laser Damage Threshold

220 MW/cm² (1.06 µm, 15 ns)

Standard Fabrication Specifications

Specification

Value

Orientation Tolerance

±0.5°

Clear Aperture

>90%

Surface Flatness

λ/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.)

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.

 

POC Strength and Capabilities

Photonics On Crystals (POC) is a leading provider of AgGaGe5Se12 Crystals, offering high-quality products tailored to industrial and scientific requirements. With precision fabrication and robust quality control, POC ensures optimal performance and durability for mid-IR laser systems. Our team supports custom design and coating solutions to meet diverse application demands.

Standard Products

Product Code

Dimensions (mm)

Coating Type

Application

Price (USD)

AGGS-1010-AR

10 × 10 × 2

AR Coating

Mid-IR Laser Systems

Request

AGGS-2020-AR

20 × 20 × 5

AR Coating

High-Power Applications

Request

Custom

Custom Sizes

Customized

Tailored for Specific Needs

Request

POC-OC-122417-AgGaGe5Se12 Crystal

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