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Fe²⁺/ZnS Crystal

POC-OC-122483-Fe²⁺/ZnS Crystal

  • Wide tunability in the mid-IR spectrum (2.5–4.0 µm).
  • High optical gain and low non-radiative losses, making it ideal for laser systems.
  • Excellent thermal and mechanical properties for high-power applications.
  • Durable and chemically stable for long-term use in industrial and medical environments.
  • Customizable dimensions and coatings to meet various application needs.

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

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General Description

Fe²⁺/ZnS crystals are doped zinc sulfide crystals specifically engineered for high-performance mid-infrared (mid-IR) laser systems. These crystals are characterized by their wide transparency range (0.4–12 µm) and strong absorption/emission properties in the mid-IR range, particularly from 2.5–4.0 µm. The doping of ZnS with iron ions enhances its optical gain and minimizes non-radiative losses, resulting in high-efficiency laser output. Fe²⁺/ZnS crystals exhibit excellent thermal stability, mechanical durability, and chemical resistance, making them suitable for challenging environments. These properties, combined with their versatility and customizability, make Fe²⁺/ZnS an indispensable component for mid-IR laser technology and spectroscopy applications.

General Applications and Examples

  1. Mid-IR Laser Systems:
    Fe²⁺/ZnS crystals are utilized as active laser media in high-power mid-IR lasers for materials processing, enabling precise cutting and engraving of a wide range of materials.
  2. Medical Laser Applications:
    The crystals’ mid-IR tunability and high optical gain make them suitable for medical applications like laser surgery and dermatological treatments, providing precise energy delivery with minimal thermal damage to surrounding tissues.
  3. Spectroscopy and Gas Sensing:
    Fe²⁺/ZnS crystals are key components in tunable laser systems for gas spectroscopy, environmental monitoring, and industrial diagnostics, especially in applications requiring detection of trace gases.
  4. Optical Parametric Oscillators (OPOs):
    These crystals are frequently used in OPO systems to generate coherent radiation in the mid-IR range, finding applications in scientific research, bioimaging, and defense.
  5. Infrared Imaging Systems:
    Fe²⁺/ZnS crystals contribute to high-performance thermal imaging systems for surveillance, military, and industrial purposes, where accurate imaging in the mid-IR range is essential.

Chemical and Structural Properties

Property Value
Chemical Formula ZnS with Fe²⁺ doping
Density 4.09 g/cm³
Thermal Conductivity ~27 W·m⁻¹·K⁻¹
Melting Point ~1700°C
Hardness ~3.5 (Moh’s scale)
Crystal Structure Cubic
Refractive Index ~2.3
Orientation <111>, <110>, <100>
Cleavage Plane <111>

Optical Properties

Property Value
Transparency Range 0.4–12 µm
Emission Wavelength Range 2.5–4.0 µm
Absorption Cross-Section High
Emission Cross-Section High
Pump Wavelength Range ~1.9–2.1 µm
Laser Damage Threshold >500 MW/cm²

Standard Fabrication Specifications

Specification Value
Dimensional Tolerance ±0.05 mm
Surface Quality 40-20 (scratch-dig rating)
Surface Flatness λ/8 @ 632.8 nm
Parallelism <30 arcsec
Bevel <0.25 × 45°
Diameter Range Up to 100 mm
Thickness Range 1–10 mm

Spectrum Transmission Curve

The transmission spectrum of Fe²⁺/ZnS crystal showcases excellent transparency over a wide wavelength range, with strong absorption and emission properties in the mid-IR region. Detailed graphs depicting transmission curves are available upon request.

Coating Specification

  • Anti-Reflection Coating: Custom coatings optimized for 2.5–4.0 µm range with reflectance <0.5%.
  • Durable Coatings: Coatings designed to withstand harsh environmental conditions and prolonged laser exposure.
  • Specialized Coatings: Tailored coatings available for specific laser 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 Dimensions Price (USD)
Fe²⁺/ZnS Laser Rods 10–50 mm length $1,200–$6,000
Fe²⁺/ZnS Optical Windows 20–100 mm diameter $2,000–$9,000
Fe²⁺/ZnS Gain Mediums Custom dimensions $3,500–$16,000
Customization Options Available on request Contact for quote

POC-OC-122483-Fe²⁺ ZnS Crystal

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