LBTEK-Polarization Grating

Product Description

Liquid Crystal Polymer / N-BK7 Window, Planar Sandwich Structure, No Housing, with Flat Edge
Fast Axis Orientation of the Liquid Crystal Molecules Exhibits a Periodic Continuous Gradient Along the X-Direction, λ/2 Retardance
Enables Beamsplitting and Beam Steering with Adjustable Energy Ratio
Planar Structure, Polarization-Dependent, High Diffraction Efficiency
Operating Wavelength λ: 488–1550 nm, Phase Period p: 5 or 8 μm
Supports Flexible Customization of Specifications

LBTEK Polarization Grating (PG) is fabricated from liquid crystal polymer (LCP) birefringent material and N-BK7 glass substrates, featuring a sandwich structure with front and rear glass substrates and a central LCP functional layer, no housing with a single flat edge. In the LCP layer, the fast axis orientation of the liquid crystal molecules exhibits a periodic continuous gradient along the x-direction, with a uniform λ/2 retardance across the entire element plane, making it a single-wavelength element. The polarization grating features polarization-dependent optical properties; depending on the polarization state of the incident beam, it enables beamsplitting with an adjustable energy ratio or non-mechanical beam steering. Compared to conventional gratings, the polarization grating introduces polarization modulation functionality; its planar structure with no physical surface relief facilitates integration; and it has an extremely low zero-order fraction with very high diffraction efficiency. LBTEK offers standard polarization gratings with optional operating wavelengths λ from 488 to 1550 nm and grating periods p of 5 or 8 μm, while also supporting flexible customization of specifications to meet diverse application requirements. For more details, please contact LBTEK Technical Support.

Diagram

Attributes

MaterialLiquid Crystal Polymer/N-BK7 Window

Optical component sizeØ25.4×3.2 mm, Single Flat Edge

Clear ApertureØ20 mm

Retardanceλ/2

Operating Temperature-20℃~60℃

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＜ 2 arcmin

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	$1,258.13	today	Add Cart
PZGS25-5-532	5 μm	532 nm	Ø20 mm	$1,258.13	today	Add Cart
PZGS25-5-633	5 μm	633 nm	Ø20 mm	$1,258.13	3 weeks	Add Cart
PZGS25-5-780	5 μm	780 nm	Ø20 mm	$1,258.13	today	Add Cart
PZGS25-5-850	5 μm	850 nm	Ø20 mm	$1,258.13	today	Add Cart
PZGS25-5-980	5 μm	980 nm	Ø20 mm	$1,258.13	today	Add Cart
PZGS25-5-1064	5 μm	1064 nm	Ø20 mm	$1,258.13	3 weeks	Add Cart
PZGS25-8-1550	8 μm	1550 nm	Ø20 mm	$1,251.96	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		$1,233.46		today	Add Cart
	PZGS-5-850	5 μm	850 nm	Ø20 mm		$1,233.46		today	Add Cart