Custom Size Optical CVD Diamond Window Ra < 5nm for High-End Photonics 10*10*0.1

CVD Single Crystal Diamond for Optical Applications

1. Detailed Introduction

Optical Grade CVD (Chemical Vapor Deposition) Single Crystal Diamond is a high-purity synthetic material engineered for the most demanding optical environments. Classified as Type IIa, it is the purest form of diamond, characterized by the absence of nitrogen impurities that cause absorption in natural diamonds. Unlike polycrystalline diamond, the single-crystal structure ensures a continuous lattice, providing superior optical clarity, zero grain-boundary scattering, and unmatched structural integrity for high-power laser and sensing applications.

2. Technical Characteristics

• Broad Spectral Transparency: Offers an exceptional transmission window from the Ultraviolet (UV) at 225nm, through the visible spectrum, to the far Infrared (IR) beyond 25μm.

• Highest Thermal Conductivity: Boasts a thermal conductivity of 1800–2200 W/m.K, the highest of any known bulk material, allowing for rapid heat dissipation in high-energy systems.

• Extreme Mechanical Hardness: With a Knoop hardness of approximately 100 GPa, it is highly resistant to scratching, erosion, and mechanical wear.

• Low Thermal Expansion: A very low coefficient of thermal expansion ensures high dimensional stability even under extreme temperature fluctuations.

• Chemical Inertness: Completely resistant to all acids, alkalis, and solvents, making it ideal for use in corrosive or harsh chemical environments.

• High Radiation Hardness: Capable of withstanding high-intensity radiation (X-rays, Gamma rays) without degrading its optical properties.

3. Applications

• High-Power Laser Windows: Used as output windows for CO2 lasers, fiber lasers, and disk lasers where high power density would melt or damage other materials.

• Infrared (IR) & UV Spectroscopy: Ideal for ATR (Attenuated Total Reflection) prisms, infrared windows for sensors, and spectroscopy components in chemical analysis.

• Semiconductor Thermal Management: Acts as a high-performance heat spreader or substrate for high-frequency GaN-on-Diamond and RF power devices.

• Aerospace & Defense: Used in FLIR (Forward Looking Infrared) systems, missile domes, and cockpit windows requiring both optical clarity and extreme durability.

• Scientific Research: Critical for Synchrotron X-ray beamline windows, high-pressure physics (Diamond Anvil Cells), and quantum optics.

• Precision Machining: Used as tool blanks for Single Point Diamond Turning (SPDT) to create ultra-precise optical mirrors and lenses.

4.Advantages

• Superior Power Threshold: Diamond can handle significantly higher laser power densities than Zinc Selenide (ZnSe) or Sapphire, preventing "thermal lensing" and beam distortion.

• Extreme Durability in Harsh Environments: Its hardness and chemical resistance allow it to operate in desert sandstorms, deep-sea environments, or corrosive chemical reactors where other optics would fail.

• Ultimate Signal Integrity: The lack of grain boundaries in single-crystal diamond ensures zero scattering, providing the highest possible signal-to-noise ratio for sensitive detectors.

• Extended Component Lifespan: While the initial cost is higher, diamond's resistance to wear and damage leads to a much lower Total Cost of Ownership (TCO) due to reduced downtime and replacement frequency.

• Miniaturization: Its incredible strength and thermal properties allow for thinner, smaller optical components without sacrificing performance.

Summary

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