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United Photonics Technology
Waveplates

Principle Application 4 Waveplate
UPT quarter waveplates create a quarter-wavelength phase shift 2, 90 and can convert linear polarization to circular polarization and vice versa. They are often used with a linear polarizer to form an isolator, blocking light reflected back from other surfaces (ellipsometry, optical pumping, isolation).

UPT half waveplates retard one polarization direction by half a wavelength 180, effectively changing the direction of linear polarization, depending on the orientation of incident linear polarization with respect to the crystal axis. Therefor they can be used as continuously adjustable polarization rotators e.g. in electro optical modulation or as a variable beam splitter when used in combination with a polarizing beam splitter.

Achromatic Waveplate
Unlike standard waveplates, Achromatic Waveplates, provide a constant phase shift independent of the wavelength of light that is used.This wavelength independence is achieved by using two different cr..


Zero Order Waveplate-Cemented by Epoxy
The zero order waveplate is designed to give a retardance of zero full waves, plus the desired fraction. Zero order waveplate shows better performances than multiple order waveplates, it has broad ban..

Zero Order Waveplate-Optically Contacted
Optically Contacted zero order waveplate is constructed by two quartz plates with their fast axis crossed, the two plates are constructed by optically contacted method, the optical path is epoxy free...


Zero Order Waveplate -Air-spaced
Air spaced zero order waveplate is constructed by two quartz plates installed in a mount, to form a air gap between the two quartz plates. The difference in thickness between the two plates determines..

True Zero Order Waveplate
Broad Spectral Bandwidth Wide Temperature Bandwidth Wide Angle Bandwidth Cemented by Expoy Specifications: Material: ..

Low Order Waveplate
Multiple order waveplate means the retardance of a light path will undergo a certain number of full wavelength shifts in addition to the fractional design retardance. The thickness of multi order wave..

Dual Wavelengths Waveplate
Single retardation plate Dual-wavelength AR coated, R0.2% foundational wavelength R0.5% SHG wavelength Specifications Material: ..

Payments:T/T
Delivery:2days for stock,OEM about 3-5weeks
Origin:CHINA
Packing:optical package
Inspection:MIL
Samples:Charge
Sample Price:$0.10
Remarks:

United Photonics Technology
Waveplates
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Principle / Application /4 Waveplate
UPT quarter waveplates create a quarter-wavelength phase shift (�?/2, 90°) and can convert linear polarization to circular polarization and vice versa. They are often used with a linear polarizer to form an isolator, blocking light reflected back from other surfaces (ellipsometry, optical pumping, isolation).

Principle / Application /2 Waveplate
UPT half waveplates retard one polarization direction by half a wavelength (, 180°), effectively changing the direction of linear polarization, depending on the orientation of incident linear polarization with respect to the crystal axis. Therefor they can be used as continuously adjustable polarization rotators e.g. in electro optical modulation or as a variable beam splitter when used in combination with a polarizing beam splitter.

Zero Order Waveplate

The zero order waveplate is designed to give a retardance of zero full waves, plus the desired fraction. Zero order waveplate shows better performance than low/multiple order waveplates. It has broad bandwidth and a lower sensitivity to temperature and wavelength changes. It should be considered for more critical applications.


It is constructed of two low order waveplates with their axes crossed. Thus,the effect of the first plate is canceled by the second,except for the residual difference between them. There are normally three different structures as follows,


Optical Contact

Cemented by Epoxy

Air spaced



Low Order Waveplate

Low(multiple) order waveplate is designed to give a retardance of several full waves, plus the desired fraction. This result in a single, physically robust component with desired performance. However, even small changed in wavelength or temperature will result in significant changes in the desired fractional retardance. They are less expensive and find use in many applicatios where the increased sensitivities are not an important.


Photonchinas waveplates fabrication starts from quartz materials cutting with their axes oriented within a few arcminutes before being polished to a laser-quality finish, arcsecond parallelism, and

Waveplates (retardation plates or phase shifters) are made from materials which exhibit birefringence, we usually use quartz or quartz+bk7. There are several kinds of waveplates, multi-order waveplate, zero order waveplate, true zero order waveplate and dual wavelength waveplate. Our standard size is dia10mm, 12.7mm, 15mm, 20mm, 25.4mm and 30mm. Of course, other size and coating are available upon request.

1mm

All kinds of bespoke optical waveplates

Achromatic Waveplate

Achromatic waveplate is made from two different substrate materials such as crystal quartz and magnesium fluoride. For the single material,waveplateâ??s working wavelength is very limited because of the dispersion of the material. But Achromatic Waveplate uses two different kinds of materials,with the different dispersion, such waveplate is not sensitive to the wavelength change.

Dual Wavelength Waveplate

Dual wavelength waveplate is a special type of multiple waveplate that provides a specific retardance at two different wavelengths, itâ??s particularly useful when used in conjunction with other polarization sensitive components to separate coaxial laser beams of different wavelength. It is widely used to improve conversion efficiency in solid double frequency laser device.

Polarization Rotator

Due to the rotation activity of natural quartz crystal, it also can be used as polarization rotators so that the plane of input linearly polarized beam will be rotated at special angle which is determined by the thickness of quartz crystal.

Zero order waveplates

A quarter-or half-wave retarder made from two plates of quartz with their fast axes crossed; the difference in thickness between the two plates determines the retardance. Zero-order retarders provide accurate retardance over a broad range of wavelengths and dance over a broad range of wavelengths and are more durable than single-element retarders.

Cemented zero-order waveplates

Cemented zero-order waveplate is constructed of two multi-order waveplates with their axis crossed. Thus, it performs as a zero-order waveplate because of the effect of two plates counteracting each other. It has wide temperature bandwidth and wavelength bandwidth properties. Because it is cemented, the dama zge threshold must be considered (about 10mw/cm2) when used.



Key features:
- double plates
- broad spectral bandwidth
- wide temperature bandwidth
- ar coated

Technical capability

Material: Crystal quartz
Dimension tolerance: +0.0, -0.2mm
Wavefront distortion: λ/4 @ 632.8mm

Retardation tolerance:

Waveplates

Waveplates, also known as retardation plates, are optical element having two principal axes slow and fast, that resolve an incident polarized beam into two mutually perpendicular polarized beams. The emerging beam recombines to form a particular single polarized beam. Retardations plates produce full, half, quarter and octadic-wave retardations.

Low order waveplates

The properties of low order waveplates are much better than the multi-order wave-plates because of its thinner thickness (less than 0.5mm). Better temperature (38), wavelength (1.5nm) and incident angle (4.5�) bandwidth and high damage threshold make it widely used in common application. Also it is economical.


Key features:
-thickness: 0.2-0.5mm
-high damage threshold
-better temperature bandwidth

-low cost

Technical capability

Material:crystal quartz
Dimension tolerance:+0.0, -0.1mm
Wavefront distortion:/8
Retardation tolerance:/500
Wavelength range:240-2100nm
Parallelism:< 1 arc second
Surface quality:20-10 scratch & dig
Coating:ar/ar coating, r < 0.2% on both surface at central wavelength

Fuzhou Siaon Optoelectronic Technology Co., Ltd. provide Achromatic waveplate
Achromatic waveplate is similar to zero order waveplate except that the two plates are made from different birefringent crystals. Since the dispersion of the birefringence of two materials is different, it is possible to specify the retardation values at a broad wavelength range. So the retardation will be less sensitive to wavelength change. In other words, it can be used at a broadband wavelength range.  
Material: Quartz+MgF2
Dimension Tolerance:+0.0, -0.1mm
Clear Aperture: >90%
Wavefront Distortion: λ/4@632.8nm 
Surface Quality: 40-20 
Parallelism:< 10 arc sec
Retardation Tolerance: λ/100
Coating: AR Coating
Mount:Black Anodized Aluminum

Wavepalte Types:
Photonchinas waveplates include octadic waveplate (1/8 waveplate),quarter waveplates(1/4 waveplate), half wave plates(1/2 waveplate) and full waveplate
Both circular aperture and quadratic aperture are available.

Photonchinaâ??s waveplate can transmit light and modify its polarization state without attenuating, deviating, or displacing the beam.It is ideal for applications requiring high damage thresholds and retardation stability over temperature change, such as for use with lasers or infrared light sources.

The true zero order waveplate means that the thickness of waveplate is very thin (less than 0.1mm) which make the true zero order waveplate excellent in temperature, wavelength and incident angle (about 20) bandwidth. Therefore, it is excellent choice for the highly accurate application. It is cemented with a block of glass which is limited to low and medium power application.

Key features:

- broad spectral bandwidth
- wide temperature bandwidth
- wide angle bandwidth
- cemented by epoxy

Technical capability

Material: Crystal quartz / bk7 optical glass


Dimension tolerance: +0.0, -0.1mm
Wavefront distortion: 8 @ 632.8nm
Retardation tolerance: 500
Wavelength range: 400-2100nm
Parallelism: < 1 arc second
Surface quality: 20-10 scratch & dig
Coating: Ar/ar coating, r < 0.2% on both surface at central wavelength

Fuzhou Siaon Optoelectronic Technology Co., Ltd. provide Dual Wavelength Waveplates
Dual wavelength waveplate is a multiple waveplate that provide a specitfic retardance at two different wavelengths, it's particularly useful when used in conjunction with other polarization sensitive components to separate coaxial laser beams of different wavelength. 
Material: Quartz
Dimension Tolerance:+0.0, -0.1mm
Clear Aperture: >90%
Wavefront Distortion: λ/8@632.8nm 
Surface Quality: 20-10 
Parallelism:< 1 arc sec
Retardation Tolerance: λ/300
AR Coating:Rï¼?0.2%@Wavelength
Mount:Black Anodized Aluminum

Material optional
Dimension Tolerance :0.1mm
Angular Tolerance :3'
Surface Quality : 60/40 40/20
Sharp Edges:optional
Coating:optional


Optional

RFQ DRWGS