Polymer Annular Shaping DOEs VR25H-1064-4

Overview

The VR25H-1064-4 Polymer Annular Shaping DOE is built from a liquid crystal polymer (LCP) functional layer between UV fused silica window sheets, forming a sandwich flat-plate structure. Acting as a geometric-phase element with λ/2 retardance, it converts an incident TEM00 Gaussian beam into an annular intensity distribution with a central hole. This model carries topological order m = 4 — the smaller the annular order m, the smaller the central hole of the beam — and operates at 1030-1080 nm over a Ø21.5 mm clear aperture with a conversion efficiency of ＞99.5 %.

Key Features

• Liquid Crystal Polymer/UVFS window material, sandwich flat structure
• Applicable for generating annular beams
• High efficiency and stability, easy operation, large incident angle, high damage threshold
• Design wavelength: 532 nm, 1064 nm, annular order m value: 1, 2, 4 optional
• Flexible customization of parameter specifications available

Applications

Annular and vortex beams produced by this element are used in laser processing, particle manipulation and capture, optical communication and related fields. In processing applications the focused field of a radially polarized beam offers strong penetration and highly concentrated intensity, reaching roughly twice the efficiency of a circularly polarized beam where polarization matters, such as metal processing. A representative assembly is:

• 30 mm Coaxial System XY Translation Mount — TXY1 ×1
• Polymer Annular Beam Shaping DOE — VR25H-1064-4 ×1
• SM1 Retaining Ring — SM1R ×1
• SM1 Retaining Ring Wrench — OWR-1A ×1

Construction & Performance

The element is supplied as a bare die without a mechanical housing, in a Ø25.4×3.2 mm format built on Liquid Crystal Polymer/UVFS Window Sheet. It accepts input beams from Ø1.0~Ø21.5 mm at an angle of incidence up to ±20 °, with a centre offset tolerance of <0.5 mm and a transmitted light deflection of <1 arcmin. Optical performance is ＞98 % transmittance at the working wavelength, ＜λ/4@633 nm wavefront error, 40/20 surface quality and a fast-axis accuracy of ±1 °. Key specifications:

• Component Size: Ø25.4×3.2 mm
• Operating Wavelength λ: 1030-1080 nm
• Order m: 4
• Clear Aperture: Ø21.5 mm
• Component Material: Liquid Crystal Polymer/UVFS Window Sheet
• AR Coating: Rabs＜0.25%@532nm,1064nm
• Operating Temperature: -20~80 ℃
• Conversion Efficiency: ＞99.5 %
• Angle of Incidence (AOI): ±20 °
• Center Offset: <0.5 mm
• Retardance: λ/2
• Transmitted Light Deflection (withoutmechanical housing installed): <1 arcmin
• Surface Quality (Scratch/Dig): 40/20
• Transmittance (@working wavelength): ＞98 %
• Input Beam Size: Ø1.0~Ø21.5 mm
• Wavefront Error (RMS): ＜λ/4@633 nm
• Delay Accuracy & Uniformity: ±5 nm
• Fast Axis Accuracy (central angle): ±1 °

Storage & Handling

Keep the incident beam inside the Ø21.5 mm clear aperture and within the Ø1.0~Ø21.5 mm input beam size, respect the ±20 ° angle of incidence and <0.5 mm centre offset limits, and stay inside the -20~80 ℃ operating temperature range. Both faces carry Rabs＜0.25%@532nm,1064nm. Store the element in its original packaging away from dust and moisture, and clean only the coated surfaces.