Quartz Polarization Grating PZGSF-200-355

Overview

This Quartz Polarization Grating is a polarization-dependent diffractive optical element fabricated on an ultraviolet fused silica (UVFS) substrate with an internally inscribed birefringent microstructure. Within the substrate the fast-axis orientation of the microstructure varies periodically and continuously along the x-direction with a grating period of 200 μm, while a uniform half-wave retardation is maintained across the entire device plane, making it a single-wavelength device for 355 nm operation. Compared with a conventional grating it adds polarization modulation to the diffraction function, and the energy proportion between the diffracted beams is polarization-dependent. It is supplied as a single-piece Ø25.4x3 mm one-inch bare die without a mechanical housing.

Applications

• Energy-proportion-adjustable beam splitting
• Beam scanning

Construction & Performance

The birefringent microstructure is inscribed inside the ultraviolet fused silica (UVFS) substrate, so the device is planar and free of physical protrusions or depressions, which facilitates integration into an optical train. The UVFS substrate choice ensures a high damage threshold in the ultraviolet band. Key specifications for this model:

• Optical Component Size: Ø25.4x3 mm
• Operating Wavelength: 355 nm
• Grating Period: 200 μm
• Clear Aperture: 10x10 mm
• Material: Ultraviolet Fused Silica (UVFS)
• Surface Finish: 40/20
• Surface Flatness: <λ/8@632.8 nm
• Transmittance: >94%@355 nm
• Surface Parallelism: <5 arcsec
• Diffraction Efficiency: >90%

Storage & Handling

Handle the die by its edges and keep the clear aperture free of dust and fingerprints. The device is supplied unmounted as a bare die, so use a holder that does not stress the substrate and observe the beam-input orientation of the periodic structure. Clean only when necessary with optical-grade solvents and lens tissue. Store in the original container in a clean, dry environment away from direct sunlight, condensation and corrosive vapors.