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

Optical component materialLiquid Crystal Polymer/N-BK7 Window Plate

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

Clear ApertureØ20 mm

Latencyλ/2

Operating Temperature-20 ℃~80 ℃

Delay Accuracy & Uniformity±5 nm

Surface finish (scratches/pits)40/20

Phase cycle p5 or 8 μm

Number of cores200 or 125

Diffraction efficiency＞98 %

Surface Parallelism

Polarization Gratings, Phase Period 5 or 8 μm

Clear Aperture: Ø20 mm, Working Wavelength λ: 400-1550 nm Optional, Phase Period p: 5 or 8 μm
Polarization-dependent Beam Splitting Characteristics
Beam Deflection Angle Increases With Wavelength
Diffraction Efficiency >98 %

The clear aperture of LBTEK's 5 or 8 μm polarization gratings is Ø20 mm, with selectable working wavelengths ranging from 400-1550 nm. Depending on the polarization state of the incident light, they can be used to achieve proportionally adjustable beam splitting effects and beam scanning effects. Under the same phase period, polarization gratings with different working wavelengths exhibit different beam deflection angles when illuminated by corresponding wavelength light. All products in this category guarantee a diffraction efficiency of >98%.

Polarization grating morphology 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	today	Add Cart

Polarization Gratings, Phase Period 5 μm, without Protective Glass Attached

Clear Aperture: Ø20 mm, Working Wavelength λ: 520, 850 nm, Phase Period p: 5 μm
Polarization-dependent Beam Splitting Characteristics
Beam Deflection Angle Increases With Wavelength
No Protective Glass Attached, no Edge Trimming, Diffraction Efficiency >96%

The LBTEK 5 μm unprotected glass polarization grating has a clear aperture of Ø20 mm and operates at two wavelengths: 520 nm and 850 nm. Depending on the polarization state of the incident light, it can achieve proportionally adjustable beam splitting and beam scanning effects. Under the same phase period, polarization gratings with different operating wavelengths exhibit different beam deflection angles when illuminated by their respective wavelengths. Both products come without protective glass and feature an arrow on the side indicating the correct incident direction. All products in this group guarantee a diffraction efficiency of >96%.

Polarization grating morphology under linearly polarized light

	Product Model	Phase cycle p	Operating wavelength λ	Clear Aperture	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