High-power Annular Shaping DOE DOE25Q-1080-RI1-14

Overview

The DOE25Q-1080-RI1-14 High-Power Annular Shaping DOE is a beam shaping device that adopts an axicon-like phase design, with specific phase patterns etched on a fused silica substrate surface, converting a Gaussian beam into an annular beam energy distribution based on diffractive optics principles. Compared with liquid crystal polymers, UV Fused Silica (UVFS) features low absorption and a high damage threshold. Thanks to the freely designable inner and outer diameters of the ring and the high uniformity of energy distribution on the ring, this element operates at 1080 nm with a 8.8 μm inner / 130 μm outer ring-shaped light spot at the standard 650mm focal length.

Key Features

• UVFS material, more suitable for high-power laser applications
• Can be used to generate annular beams
• Design Wavelength 1080 nm
• Inner and outer diameters can be customized freely
• wavelength range: 1080 nm
• Gaussian-to-annular energy conversion
• Pure UV Fused Silica (UVFS), High damage threshold

Applications

The High Power Ring-Shaping DOE has significant application potential in 3D printing, laser welding, and laser drilling scenarios. It is typically used in combination with a focusing lens to obtain a focused annular spot. A representative assembly is:

• 30 mm Coaxial System XY Translation Mount — FLF1 ×1
• High Power Ring Shaping DOE — DOE25Q-1080-RI1-14 ×1
• SM1 Retaining Ring — SM1R ×1
• SM1 Retaining Ring Spanner — OWR-1A ×1

Construction & Performance

The element is made of UV Fused Silica (UVFS) and fabricated using surface relief technology. It shapes the incident TEM00 Gaussian beam into an annular spot. The product is supplied without mechanical housings and can be used with optional compatible mechanical housings; the Ø25.4 mm×0.5 mm optical component size is compatible with standard 1-inch optical component mounting frames. Standard specifications are based on a focal length of 650mm — in actual use it can be adapted to focusing lenses with different focal lengths, and the annular spot size scales linearly with the focal length. This model delivers >90% diffraction efficiency and >98% transmittance at the center wavelength, with <10% non-uniformity on the ring. Key specifications:

• Component Size: Ø25.4 mm×0.5 mm
• Operating Wavelength: 1080 nm
• Inner Diameter of The Ring-shaped Lightspot: 8.8 μm
• Outer Diameter of The Ring-shaped Lightspot: 130 μm
• Clear Aperture: Ø22 mm
• Effective Focal Length (EFL): 650mm
• Component Material: UV fused silica
• Output Beam Shape: Ring
• Incident Spot Diameter: Ø14 mm
• Incident Light Eccentricity: ±0.7 mm（±5% of the input beam diameter）
• Transmittance(@Center wavelength): >98%
• Non-uniformity: <10%
• Incident Beam Quality: M2<1.3
• Incident Light Tilt: ±5°
• Surface Finish (scratches/pitting): 60/40
• Diffraction Efficiency: >90%

Storage & Handling

Keep the incident beam inside the Ø22 mm clear aperture and within the Ø14 mm incident spot diameter; respect the ±5° incident light tilt and ±0.7 mm（±5% of the input beam diameter） incident light eccentricity limits, and use a beam of M2<1.3 quality or better. Store the element in its original packaging away from dust and moisture, and clean only the coated optical surfaces.