Waveplate

Introduction of Waveplate

Waveplate is an optic in which the polished faces contain the optical axis. All light incidents normal to the surface are composed of components polarized parallel and perpendicular to the axis. In such a device, light polarized parallel to the axis will propagate slower than light polarized perpendicular to the axis. As the light propagates through the optic, the phase shift between the two components with various thickness. The phase shift is called retardance. The most popular retarders are quarter and half wave. with an appropriate choice of thickness, any degree of retardance may be achieved at any wavelength for which quartz is transparent. However, the minimum thickness necessary to achieve a mechanically strong part corresponds to several full waves of retardance.

Photonchina’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.

Production

Photonchina’s 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 <λ/10 wavefront. Their thickness tolerance is a only small fraction of a micron. To verify retardation tolerances, specially-trained optical technicians use purpose-built test gear. After anti-reflective coating, zero order and achromatic waveplates are matched in pairs and accurately aligned to each other within their cell mounts.

Waveplates Types:

Photonchina’s waveplates include octadic waveplate (1/8), quarter waveplates(1/4), half wave plates(1/2) and full waveplate.

Both circular aperture and quadratic aperture are available.

Half Waveplate

A half waveplate rotates linearly polarized light to any desired orientation. The rotation angle is twice the angle between the incident polarized light and optical axis.


half waveplate

Quarter Waveplate

When linearly polarized light is input at 45deg to the axis of a quarter waveplate , the output is circularly polarized similarly, input circularly polarized light is transformed into linearly polarized light.

quarter waveplate

Photonchina provides standard waveplate wavelengths (nm) listed as below:The thickness of the quarter waveplate is such that the phase difference is 1/4 wavelength ( λ /4, Zero order) or certain multiple of 1/4-wavelength [(2n+1)λ /4, multiple order].

355532632.880885098010641310148015501590

Other wavelengths within the ranger of 200-2300nm are also available.
Standard Specifications:
Material: Crystal Quartz
Dimension tolerance: +0.0, -0.1mm
Wavefront distortion: < l /8@632.8
Retardation tolerance: < l /500
Wavelength range: 240-2100 nm
Parallelism: <1 arc second
Surface quality: 20/10 scratches and dig
Clear aperture: >90%
AR coating: R<0.2% at central wavelength
Standard Wave: quarter-wave ( l /4), half-wave ( l /2)

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.

Specifications:

  •  Material:                         Quartz
  •  Wavelength Range:       200~2300 nm,
  •  Dimension Tolerance:   +0.0, -0.1mm
  •  Surface Quality:              20 / 10
  • Parallelism:                     <1 arc Sec
  • Wavefront Distortion:      < λ/8@633nm
  • Retardation Tolerance:   < λ/300
  •  Clear Aperture:              >90%
  •  Damage Threshold:       >500 MW/cm2
  •  AR Coating:                   R<0.2%@wavelength
  •  Mount:                           Black Anodized Aluminium
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

Specifications:

  •  Material:                          Quartz
  •  Wavelength Range:       200~2300 nm,
  •  Dimension Tolerance:   +0.0, -0.1mm
  •  Surface Quality:              20 / 10
  • Parallelism:                      <1 arc Sec
  • Wavefront Distortion:      < λ/8@633nm
  • Retardation Tolerance:   < λ/500
  •  Clear Aperture:               >90%

Damage Threshold:           Air spaced, >500 MW/cm2;

                                             Optical contact, >200 MW/cm2;

                                             Cemented, >100 MW/cm2

  •  AR Coating:                   R<0.2%@wavelength
  •  Mount:                           Black Anodized Aluminium
 
1.  Cemented Zero Order Waveplate

 zero order waveplate cemented

Cemented zero order waveplate is constructed by two quartz plates with their fast axis crossed, the two plates are cemented by UV epoxy. The difference in thickness between the two plates determines the retardation. Zero order waveplates offer a substantially lower dependence on temperature and wavelength change than multi order waveplates.

  • Cemented by Epoxy
  • Thickness 1.0~2mm
  • Double Retardation Plates
  • Broad Spectral Bandwidth
  • Wide Temperature bandwidth
  • AR coated and Mounted
 
Photonchina Specifications:

Material:

Quartz

Diameter Tolerance:

+0.0, -0.1mm

Wavefront Distortion :

λ/8 @ 632.8nm

Retardation Tolerance:

λ/300

Parallelism:

<1 arc second

Surface Quality:

20/10

Clear Aperture:

>90%

Coating:

S1&S2: R<0.2% @ wavelength

Standard wavelength:
266nm, 355nm,532nm, 632.8nm, 780nm,808nm, 850nm, 980nm,1064nm, 1310nm, 1480nm, 1550nm
 
 

Order Information:  Below are standard sizes. Custom size is available upon request.

 

P/N: Half

P/N: Quarter

Diameter(mm)

PC-CWP210

PC-CWP410

10.0

PC-CWP212

PC-CWP412

12.7

PC-CWP215

PC-CWP415

15.0

PC-CWP220

PC-CWP420

20.0

PC-CWP225

PC-CWP425

25.4

PC-CWP230

PC-CWP430

30.0

 

  2.Optical Contact Zero Order Waveplate

zero order waveplate

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. The difference in thickness between the two plates determines the retardation. Zero order waveplates offer a substantially lower dependence on temperature and wavelength change than multi order waveplates.

 

 

  • Optical contact
  • Thickness 1.0~2mm
  • Double Retardation Plates
  • Broad Spectral Bandwidth
  • Wide Temperature bandwidth
  • High damage threshold
 
Photonchina Specifications:

Material:

Quartz

Diameter Tolerance:

+0.0, -0.1mm

Wavefront Distortion :

λ/8 @ 632.8nm

Retardation Tolerance:

λ/300

Parallelism:

<1 arc second

Surface Quality:

20/10

Clear Aperture:

>90%

Coating:

S1&S2: R<0.2% @ wavelength

 Standard wavelength:

266nm, 355nm,532nm, 632.8nm, 780nm,808nm, 850nm, 980nm,1064nm, 1310nm, 1480nm, 1550nm

 

Order Information:  Below are standard sizes. Custom size is available upon request.

 

P/N: Half

P/N: Quarter

Diameter(mm)

PC-OWP210

PC-OWP410

10.0

PC-OWP212

PC-OWP412

12.7

PC-OWP215

PC-OWP415

15.0

PC-OWP220

PC-OWP420

20.0

PC-OWP225

PC-OWP425

25.4

PC-OWP230

PC-OWP430

30.0

 

 

3.  Air Spaced Zero Order Waveplate

waveplate, air space
 
 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 the retardation. Zero order waveplates offer a substantially lower dependence on temperature and wavelength change than multiorder waveplates.
  • Air spaced
  • Thickness 1.0~2mm
  • Double Retardation Plates
  • Broad Spectral Bandwidth
  • Wide Temperature bandwidth
  • High damage threshold
  • AR coated and Mounted

 

Photonchina Specifications:

Material:

Quartz

Diameter Tolerance:

+0.0, -0.1mm

Wavefront Distortion :

λ/8 @ 632.8nm

Retardation Tolerance:

λ/300

Parallelism:

<1 arc second

Surface Quality:

20/10

Clear Aperture:

>90%

Coating:

S1&S2: R<0.2% @ wavelength

 Standard wavelength:

266nm, 355nm,532nm, 632.8nm, 780nm,808nm, 850nm, 980nm,1064nm, 1310nm, 1480nm, 1550nm

 
 

Order Information:  Below are standard sizes. Custom size is available upon request.

 

P/N: Half

P/N: Quarter

Mount Diameter
(mm)

Clear Aperture
(mm)

Thickness
(mm)

PC-AWP210

PC-AWP410

25.4 ,

10.0 

8.0

PC-AWP212

PC-AWP412

25.4

12.7

8.0

PC-AWP215

PC-AWP415

25.4

15.0

8.0

PC-AWP220

PC-AWP420

30.0

20.0

8.0

PC-AWP225

PC-AWP425

30.0

25.4

8.0

 
 
 
True Zero Order Waveplate

Specifications:

  •  Material:                          Quartz
  •  Wavelength Range:       200~2300 nm,
  •  Dimension Tolerance:   +0.0, -0.1mm
  •  Surface Quality:              20 / 10
  • Parallelism:                      <1 arc Sec
  • Wavefront Distortion:      < λ/8@633nm
  • Retardation Tolerance:   < λ/500
  •  Clear Aperture:               >90%

Damage Threshold:            Single plate, >1 GW/cm2;

                                             Cemented, >10 MW/cm2;

                                             High power, >1 GW/cm2;

  •  AR Coating:                   R<0.2%@wavelength
  •  Mount:                           Black Anodized Aluminium
 
 
 1. Single Plate

Waveplate single plate

 This type of zero order waveplate is designed for high damage threshold applications (> 1GW/cm2).

It is made of a very thin quartz, with the thickness of 0.038-0.09mm

In fiber-optic communications, single plate true zero order waveplate has seen applications in some devices, especially in the form of rectangle and square instead of circle.2*2mm or 0.8*1.3mm, for instance, are commonly produced by Photonchina.

Wide Angle Acceptance

Better Temperature Bandwidth

Wide Wavelength Bandwidth

Standard Wavelength

1/21310nm, 1480nm, 1550nm

1/4980nm, 1064nm1310nm, 1480nm, 1550nm

 

Order Information:  Below are standard sizes. Custom size is available upon request.

 

P/N: Half

P/N: Quarter

Diameter(mm)

PC-SWP210

PC-SWP410

10.0

PC-SWP212

PC-SWP412

12.7

PC-SWP215

PC-SWP415

15.0

PC-SWP220

PC-SWP420

20.0

 Note: Photonchina has stocks in size of 0.8*1.3,1*1mm,2*2mm etc, ready for delivery

 

 
 
 
 2. Cemented (Single plate with a holder)

waveplate cemented

 
This type of zero order waveplate is constructed of one true zero order waveplate and one BK7/K9 substrate.

As the waveplate is very thin and easy to be damaged, the BK7 plate’s function is to strengthen the waveplate.

Standard Thickness:1.1±0.2mm

Cemented by Epoxy

Wide Angle Acceptance

Better Temperature Bandwidth

Wide Wavelength Bandwidth

 

Photonchina Specifications

Material:

Quartz

Diameter Tolerance:

+0.0, -0.1mm

Wavefront Distortion :

λ/8 @ 632.8nm

Retardation Tolerance:

λ/300

Parallelism:

<1 arc second

Surface Quality:

20/10

Clear Aperture:

>90%

Coating:

S1&S2: R<0.2% @ wavelength

Standard wavelength:

532nm, 632.8nm, 780nm, 808nm980nm, 1064nm1310nm, 1480nm, 1550nm

 

Order Information:  Below are standard sizes. Custom size is available upon request.

 

P/N: Half

P/N: Quarter

Diameter(mm)

PC-BWP210

PC-BWP410

10.0

PC-BWP212

PC-BWP412

12.7

PC-BWP215

PC-BWP415

15.0

PC-BWP220

PC-BWP420

20.0

PC-BWP225

PC-BWP425

25.4

PC-BWP230

PC-BWP430

30.

 

3.High Power Waveplate

 High power:>10J/cm2@1064nm,20ns,20Hz.

 Used wavelength:400-3000nm

 Epoxy free

 Easy handling compared with single plate

 Wide spectra&temperature bandwidth,angular field

Structure: BK7/K9 glass + Quartz plate/MgF2 plate, unique optical bonding technique.

 

 

Achromatic Waveplate

Achromatic waveplate is made from two different substrate materials such as crystal quartz and magnesium fluoride. For the single material,waveplate’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.

Specifications:

  •  Material:                          Quartz and MgF2
  •  Dimension Tolerance:    +0.0, -0.1mm
  •  Surface Quality:              40 / 20
  • Parallelism:                      <1 arc Sec
  • Wavefront Distortion:      < λ/8@633nm
  • Retardation Tolerance:   < λ/100
  •  Clear Aperture:               >90%
  • Damage Threshold:         >10MW/cm2;
  •  AR Coating:                    Ravg<1.5%@wavelength

Structure: Optical contact or Air contacted

Standard wavelength:

460-650nm, 550-750nm, 650-1000nm, 900-2100nm.

 

Dual Wavelength Waveplate

Dual wavelength waveplate is a special type of multiple waveplate that provides a specific 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. It is widely used to improve conversion efficiency in solid double frequency laser device.

Specifications:

  •  Material:                          Quartz
  •  Wavelength Range:       350~2100 nm,
  •  Dimension Tolerance:   +0.0, -0.1mm
  •  Surface Quality:              20 / 10
  • Parallelism:                     <1 arc Sec
  • Wavefront Distortion:      < λ/8@633nm
  • Retardation Tolerance:   < λ/100
  •  Clear Aperture:              >90%
  •  Damage Threshold:       >1GW/cm2
  •  AR Coating:                    R<0.2%@wavelength
  •  Mount:                            Black Anodized Aluminium

Standard wavelength:

λ@1064nm+λ/2@532nm, λ/2@1064nm+λ@532nm;

λ@532nm+λ/2@355nm, λ/2@532nm+λ@355nm

 

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.

Made of quartz, 200-2500nm

Up to 50.8mm diameter

Custom rotation angle available

RoHS Compliant

Specifications:

  •  Material:                          Crystal Quartz 200-2500nm
  •  Dimension Tolerance:   +/-0.2mm
  •  Surface Quality:              20 / 10
  • Parallelism:                     <10 arc Sec
  • Wavefront Distortion:      < λ/4@632.8nm
  • Rotation accuracy:          < 5 arc Min
  •  Rotation:                         clockwise or counter-clockwise
  •  Damage Threshold:       >1GW/cm2
  •  AR Coating:                    R<0.25%@wavelength