LBTEK-Polarization gratings

Product Description

Liquid Crystal Polymer/N-BK7 window plate, sandwich flat plate structure, no housing, with trimmed edges
Fast axis orientation of liquid crystal molecules with a periodic continuous gradient along the x-direction, with λ/2 retardation
Capable to achieve energy proportion-adjustable beam splitting and beam scanning functions
Flat plate structure, polarization-dependent, high diffraction efficiency
Operating wavelength λ: 488-1550 nm optional, phase period p: 5 or 8 μm
Flexible customization of parameter specifications available

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 + intermediate LCP functional film layer" without housing and with a single-sided chamfer. In the LCP layer, the fast-axis orientation of the liquid crystal molecules exhibits a periodic continuous gradient along the x-direction, with the same λ/2 retardation across the entire device plane, making it a single-wavelength device. Polarization gratings possess polarization-dependent optical characteristics. With different polarization states of the incident beam, polization gratings can be used to achieve a tunable energy-splitting ratio for beam splitting or to realize non-mechanical beam scanning. Compared to traditional gratings, polarization gratings introduce polarization modulation functions: flat-panel structure, free of physical protrusions, easy for integration, with extremely low zero-order ratio and exceptionally high diffraction efficiency. LBTEK offers standard polarization gratings with working wavelengths λ ranging from 488 to 1550 nm and grating periods p of 5 or 8 μm, and supports flexible customization of parameter specifications to meet diverse application needs. For details, please consult LBTEK Technical Support.

Diagram

Attributes

MaterialLiquid Crystal Polymer/N-BK7 Window Plate

Optical component sizeØ25.4×3.2 mm, single-side chamfer

Clear ApertureØ20 mm

Retardanceλ/2

Operating Temperature-20 ℃~80 ℃

Delay Accuracy & Uniformity±5 nm

Surface Quality (Scratch/Dig)40/20

Phase cycle p5 or 8 μm

Number of cores200 or 125

Diffraction efficiency＞98 %

Surface Parallelism

Polarization Grating, Phase Period 5 or 8 μm

Clear Aperture: Ø20 mm, Operating Wavelength λ: 400–1550 nm, Phase Period p: 5 or 8 μm
Polarization-Dependent Beamsplitting Characteristics
Beam Deflection Angle Increases With Wavelength
Diffraction Efficiency > 98%

LBTEK 5 or 8 μm Polarization Gratings feature a clear aperture of Ø20 mm with selectable operating wavelengths from 400 to 1550 nm. Depending on the polarization state of the incident light, they enable beamsplitting with adjustable ratios and beam steering. At the same phase period, polarization gratings with different operating wavelengths produce different beam deflection angles at their respective wavelengths. All products in this group guarantee a diffraction efficiency of > 98%.

Polarization Grating Under Linearly Polarized Light

Product Model	Phase cycle p	Operating wavelength λ	Clear Aperture	Unit Price	Lead Time
PZGS25-5-488	5 μm	488 nm	Ø20 mm	$1,200.20	today	Add Cart
PZGS25-5-532	5 μm	532 nm	Ø20 mm	$1,200.20	today	Add Cart
PZGS25-5-633	5 μm	633 nm	Ø20 mm	$1,200.20	3 weeks	Add Cart
PZGS25-5-780	5 μm	780 nm	Ø20 mm	$1,200.20	today	Add Cart
PZGS25-5-850	5 μm	850 nm	Ø20 mm	$1,200.20	today	Add Cart
PZGS25-5-980	5 μm	980 nm	Ø20 mm	$1,200.20	today	Add Cart
PZGS25-5-1064	5 μm	1064 nm	Ø20 mm	$1,200.20	3 weeks	Add Cart
PZGS25-8-1550	8 μm	1550 nm	Ø20 mm	$1,194.32	3 weeks	Add Cart

Polarization Grating, Phase Period 5 μm, Without Protective Glass Bonded

Clear Aperture: Ø20 mm, Operating Wavelength λ: 520, 850 nm, Phase Period p: 5 μm
Polarization-Dependent Beamsplitting Characteristics
Beam Deflection Angle Increases with Wavelength
Without Protective Glass Bonded, No Flat Edge, Diffraction Efficiency > 96%

LBTEK 5 μm Polarization Gratings Without Protective Glass feature a clear aperture of Ø20 mm with selectable operating wavelengths of 520 and 850 nm. Depending on the polarization state of the incident light, they enable beamsplitting with adjustable ratios and beam steering. At the same phase period, polarization gratings with different operating wavelengths exhibit different beam deflection angles. Neither product in this group has protective glass bonded, and the correct incident direction is indicated by arrows on the element sides. All products in this group guarantee a diffraction efficiency of > 96%.

Polarization Grating Under Linearly Polarized Light

	Product Model	Phase cycle p	Operating wavelength λ	Clear Aperture	File	Unit Price	Compare	Lead Time
	PZGS-5-520	5 μm	520 nm	Ø20 mm		$1,176.67		today	Add Cart
	PZGS-5-850	5 μm	850 nm	Ø20 mm		$1,176.67		today	Add Cart