Polarization gratings PZGS25-5-633

LBTek Polarization Gratings (PG) are fabricated based on liquid crystal polymer birefringent materials and N-BK7 glass substrates, presenting a sandwich structure of front and rear glass substrates plus intermediate LCP functional film layer without housing and with a single-sided chamfer.

The fast-axis orientation of liquid crystal molecules exhibits a periodic continuous gradient along the x-direction, maintaining half-wave retardation across the entire device plane, making these single-wavelength devices.

Polarization gratings possess polarization-dependent optical characteristics. With different polarization states of incident beams, they achieve tunable energy-splitting ratios for beam splitting or enable non-mechanical beam scanning. Compared to traditional gratings, they feature flat-panel structure without physical protrusions, ease of integration, extremely low zero-order ratio, and exceptionally high diffraction efficiency.

Key Features

• Liquid Crystal Polymer / N-BK7 window plate sandwich flat plate structure
• Fast axis orientation with periodic continuous gradient along x-direction
• Half-wave retardation capability
• Energy proportion-adjustable beam splitting and beam scanning functions
• Flat plate structure, polarization-dependent, high diffraction efficiency
• Operating wavelength: 488-1550 nm optional
• Phase period: 5 or 8 um options
• Flexible customization of parameter specifications available