Output windows for high-power CO₂ / high-energy lasers
DIAMOND OPTICAL WINDOW
Diamond Optical Window
Diamond Optical Window
MPCVD-grown diamond optical windows combining broad spectral transmission, high thermal conductivity, and excellent chemical stability—for high-power lasers, IR detection, and extreme-environment optical systems.
QS / PRODUCT PLATFORM
MPCVD
01 / PRODUCT OVERVIEW
Product overview
Diamond optical windows are based on CVD diamond, combining broad spectral transmission, ultra-high thermal conductivity, high hardness, and excellent chemical stability to meet both optical transmission and thermal management needs in high-power optical systems.
Suited to optical-window applications that demand high power density, high thermal load, or extreme-environment tolerance (high temperature, high pressure, strong radiation)—a functional materials choice at the intersection of optics and thermal management.
01
MPCVD growth
02 / MATERIAL CHARACTERISTICS
Optical characteristics
Diamond is among the materials with the widest optical transmission windows in nature. The theoretical transmission range spans ultraviolet–visible–infrared, with a refractive index of about 2.4 (visible–near-IR). Combined with intrinsic high hardness, high thermal conductivity, and chemical inertness, it suits high-power, high thermal-load, or highly corrosive optical environments.
Band-specific transmittance, optical-grade crystal metrics (e.g., dislocation density, impurity levels), and related indicators vary with thickness, crystal grade, and surface finishing; confirmed parameters follow the inspection report or custom-request confirmation.
03 / SPECIFICATIONS
Size / thickness specifications
Standard sizes
7×7mm
8×8mm
10×12mm
11×13mm
13×15mm
15×15mm
25×25mm
THICKNESS
0.3–5mm
| Item | Specification | Notes |
|---|---|---|
| Standard sizes | 7×7mm, 8×8mm, 10×12mm, 11×13mm, 13×15mm, 15×15mm, 25×25mm | Same standard size series as the single-crystal diamond wafer line |
| Thickness | 0.3–5mm | Same standard thickness range as the single-crystal diamond wafer line |
04 / TECHNICAL HIGHLIGHTS
Material parameters
>70% (reference at 0.3 mm thickness)
%
Infrared transmittance (10.6 μm band)
About 225 nm–25 μm (theoretical range)
—
Optical transmission range
About 2.4 (visible to near-infrared)
—
Refractive index
1800–2200
W/(m·K)
Thermal conductivity
| Item | Unit | Value | Notes |
|---|---|---|---|
| Infrared transmittance (10.6 μm band) | % | >70% (reference at 0.3 mm thickness) | Measured transmittance varies with thickness, crystal grade, and surface finish. The inspection report controls. |
| Optical transmission range | — | About 225 nm–25 μm (theoretical range) | Intrinsic transmission window of diamond. Measured transmittance varies with thickness and process. |
| Refractive index | — | About 2.4 (visible to near-infrared) | Physical constant of diamond |
| Thermal conductivity | W/(m·K) | 1800–2200 | Reference for high-grade CVD single-crystal diamond. The inspection report controls. |
| Thermal expansion coefficient | 10⁻⁶/K | 1.0–1.5 | Reference for CVD single-crystal diamond (25–300°C) |
| Density | g/cm³ | 3.51–3.52 | Physical constant of diamond |
| Mohs hardness | — | 10 | Intrinsic property of diamond |
| Surface roughness (optically polished face) | — | <10 Ra (industry reference) | Published industry reference for optical-grade polishing |
| Parallelism / warp | — | A few μm (industry reference) | Published industry reference for a controllable range |
05 / PROCESSING CAPABILITY
Processing capability
STEP 01
Custom size, thickness, and optical polishing processes available; processing scope confirmed against capacity and requirements.
STEP 02
High-precision optical-face polishing and other secondary processing available; for AR coatings and other film stacks, submit a technical inquiry for R&D feasibility assessment.
STEP 03
For band-specific transmittance, laser-induced damage threshold (LIDT), and other specialized optical performance customization, submit requirements via technical inquiry.
06 / APPLICATIONS
Application fields
Infrared detection/imaging windows
Extreme-environment (high temperature, high pressure, strong radiation) optical systems
Integrated cooling and optical-window needs for thermally sensitive optical systems
07 / QUALITY & VALIDATION
Inspection documentation
Related inspection reports available on request from the company.
For lot-specific transmittance, surface quality, or other inspection data, request via "Technical inquiry"; Quality will confirm and provide as appropriate.
08 / WHERE IT FITS
Matching solutions
01
Laser and optoelectronics thermal-management solutions
High thermal conductivity plus high optical transmittance—suited to thermally stable optical-window scenarios
Explore solutions → 02Diamond materials R&D and validation platform
For materials evaluation and device validation at the intersection of optics and thermal management
Explore solutions →CONTACT
Technical inquiry
Standard specs: 7×7 mm, 8×8 mm, 10×12 mm, 11×13 mm, 13×15 mm, 15×15 mm, 25×25 mm, thickness 0.3–1 mm
Customization: thickness, optical polishing, coating stack, and non-standard size—all available on request