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Wire Grid Polarizers on Glass Substrates


  • Polarizes Wavelengths from 420 to 700 nm or 250 nm to 4 µm
  • High Transmission and Extinction Ratio
  • Protective Glass Cover

WP50L-UB

50.0 mm x 50.0 mm

WP25L-UB

25.0 mm x 25.0 mm

WP12L-VIS

12.5 mm x 12.5 mm

WP25M-VIS

Ø25.0 mm

Related Items


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Axis of Polarization Axis of Polarization
How to Determine the Polarization Axis

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View Imperial Product List
Item #QtyDescription
WP50L-VIS250.0 mm x 50.0 mm Wire Grid Polarizer, 420-700 nm
LCP05260 mm Cage-Compatible Mount for 2" Square Filters Up to 4 mm Thick, 8-32 Tap
PRM21High-Precision Rotation Mount for Ø2" (50.8 mm) Optics
ER18Cage Assembly Rod, 1" Long, Ø6 mm
TR41Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 4"
UPH31Ø1/2" Universal Post Holder, Spring-Loaded Locking Thumbscrew, L = 3"
View Metric Product List
Item #QtyDescription
WP50L-VIS250.0 mm x 50.0 mm Wire Grid Polarizer, 420-700 nm
LCP05/M260 mm Cage-Compatible Mount for 50 mm Square Filters Up to 4 mm Thick , M4 Tap
PRM2/M1High-Precision Rotation Mount for Ø2" (50.8 mm) Optics, Metric
ER18Cage Assembly Rod, 1" Long, Ø6 mm
TR100/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 100 mm
UPH75/M1Ø12.7 mm Universal Post Holder, Spring-Loaded Locking Thumbscrew, L = 75 mm
Variable Polarizing Attenuator Made with Two WP50L-VIS Polarizers 

Features

  • Large Field of View
  • Available Extinction Ratios
    • >800:1 (-VIS)
    • Up to 10 000:1 (-UB) 
  • Available Polarization Range:
    • 420 - 700 nm (-VIS)
    • 250 nm - 4 µm (-UB)
  • Multiple Sizes Available
    • 12.5 mm x 12.5 mm (Unmounted)
    • Ø25 mm (Mounted)
    • 25 mm x 25 mm (Unmounted)
    • 50 mm x 50 mm (Unmounted)

These polarizers consist of an array of parallel metallic wires sandwiched between a fused silica (-UB) or Eagle XG (-VIS) glass substrate. Featuring high transmission (see Graphs tab) and a high maximum operating temperature (200 °C for the unmounted square polarizers, 93 °C for the mounted round polarizers), wire grid polarizers are an alternative to both traditional film-based polarizers and holographic wire grid polarizers. Additionally, our -VIS wire grid polarizers have an antireflection coating for the 400 - 700 nm deposited on the back of substrate as well as on both sides of the cover glass.

Since the wire grid is prone to damage, the protective glass cover serves to reduce this risk. In addition, the glass surfaces may be cleaned, which extends the typical working lifetime when compared to unprotected wire grid polarizers.

Wire grid polarizers transmit radiation with an electric field vector perpendicular to the wire and reflect radiation with the electric field-vector parallel to the wire. The direction of polarized transmitted light is marked by a small dot on the square polarizers and by a line on the round polarizers (see diagrams to the right). Due to surface reflections, the reflected beam contains both polarizations. Please note that the mark on these wire grid polarizers indicates the axis of polarization and not the orientation of the wires (see the diagrams to the right).

The extinction ratio of a polarizer is a measure of its ability to attenuate light polarized perpendicular to the polarizer's transmission axis. The extinction ratio (ER) can be calculated by measuring the ratio of the maximum transmission (Tmax) when the polarizer is aligned to the polarization axis to the minimum transmission (Tmin) when the polarizer is rotated by 90°.

Visible Wire Grid Polarizers
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Raw Data
The shaded region indicates the specified operating wavelength range of the polarizer.
Ultra Broadband Wire Grid Polarizers
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Raw Data
Note: For wavelengths >2.6 μm, the Ultrabroadband Wire Grid Polarizer will continue to polarize the light transmitted through the fused silica substrate.

The data presented above was taken from a single production run. Performance will vary from lot to lot, but all of the polarizers available here are guaranteed to meet the specifications provided in the tables below.


Posted Comments:
ruizhi.zheng  (posted 2018-11-23 16:12:46.153)
Could you please provide the reflection graph of TE mode (the polarized light be reflected)?
nbayconich  (posted 2019-01-04 09:26:30.0)
Thank you for contacting Thorlabs. I will reach out to you directly with some data we have scanned internally. We will make this data available on our webpage once all the necessary transmission & reflection scans are completed.
Diane.Beamer  (posted 2017-07-07 16:55:43.433)
i have two Thorlabs WPM25M-VIS wire grid polarizers; i used one as a polarization generator and one as an analyzer. i get max transmission when the transmission axes are crossed. How is this possible? for instance i get over 4 mW when analyzer is at 90, and generator is at 0, and i get about 1 mW when both transmission axes are parallel to one another. i took about 40 readings in a calibration exercise, with consistent measurements. is it possible one of them is mismarked on transmission axis? i reversed the orientation of the generator but got the same thing.
tfrisch  (posted 2017-08-07 10:43:47.0)
Hello, thank you for contacting Thorlabs. Assuming there are no other optics in between them that may be birefringent, and assuming that you are referring to the engraving on the polarizer housing, and not a secondary mount (like a rotation mount), it sounds like at least one of them is mislabeled. I will reach out to you about replacing these.
Petr.bouchal  (posted 2017-05-24 15:21:43.423)
Hello, could you provide me with information on thickness of WP25M-VIS. I supposse that thickness 3.5mm includes housing of WP. I am interested in thickness of substrate plus protective glass. Thanks. Regards, P.B.
nbayconich  (posted 2017-06-12 02:33:34.0)
Thank you for contacting Thorlabs. The total thickness of just the WP25M-VIS polarizer itself without the mount is 1.53mm. A techsupport representative will contact you directly.
robert.carlson  (posted 2017-04-11 15:41:09.49)
I would appreciate a quote for a 50x50 optic (WP50L-UB) cut to provide four 15x15 pieces. (The 12.5x12.5 part is a little too small for my application.) I can accept best effort, looking for as much C.A. as possible on the 15x15 pieces. Please email me a custom quote for this. Thanks!
tfrisch  (posted 2017-04-19 05:01:56.0)
Hello, thank you for contacting Thorlabs. I will forward your request to our Tech Support team for quoting. Unfortunately, wire grid polarizers cannot be cut, so these would need to be made from scratch.
sibo  (posted 2017-04-08 10:25:19.133)
Why for the Ultra Broadband Wire Grid Polarizers the values of the extinction ratio given in the table and the ones given in the graph are so different? For instance between 600 and 2600 nm, the ER is 10000 form the graph and 1000 form the table.
tcampbell  (posted 2017-04-10 08:55:38.0)
Response from Tim at Thorlabs: thank you for your feedback. The graphs represent typical data, but performance may vary between production runs. The values in the tables further down on the page are guaranteed specifications for these items.
qkrwhdrbs  (posted 2017-02-07 05:10:08.293)
Hello. I am considering buy "WP25M-UB". Before I order it, I have to consider damage threshold. So Can you give me damage threshold imformation? Thank you.
tfrisch  (posted 2017-02-15 01:12:45.0)
Hello, thank you for contacting Thorlabs. I will reach out to you about your laser specs.
mostert  (posted 2016-07-23 17:43:19.033)
Question: Do you have ER and transmission curve data for light entering the WP25M-VIS at angles of incidence >20 degrees?
bernd-claus.weber  (posted 2016-06-13 15:36:47.087)
Question: What is the thickness of the actual wire grid layer? Is this wire grid layer exactly in the center of the glass substrate? Reason for these questions: We'd like to remove glass from both sides in order to get a thinner filter
besembeson  (posted 2016-06-15 09:58:52.0)
Response from Bweh at Thorlabs USA: You can't have the glass removed from both sides. The thickness of the wire grid on substrate is 0.7mm. There is a cover glass that has a thickness of 0.8mm. We can provide a special with the cover glass removed.
hl4  (posted 2016-04-01 18:16:26.227)
Do you also Extiction Ratio and Transmission Data for wavelength above 900 nm lets say up to 1100 nm?
besembeson  (posted 2016-04-05 09:13:23.0)
Response from Bweh at Thorlabs USA: Beyond 900nm, the transmission continues to drop and the ER fluctuates. I will share example data with you via email.
user  (posted 2016-01-07 18:05:55.623)
Another request for a damage threshold: I need to polarize a 120mJ/pulse, 20 Hz Excimer Laser at about 350 nm. Beam cross section about 2 cm². Would you consider that safe?
besembeson  (posted 2016-01-12 04:39:15.0)
Response from Bweh at Thorlabs USA: Thanks for contacting Thorlabs. We don't have test data yet for these. I will however need your pulse length (that will determine peak powers) to provide suggestions on using this. Please contact me at techsupport@thorlabs.com.
IGKIOU  (posted 2014-10-02 16:24:37.173)
Hi, are there larger versions of these polarizers available? I would be particularly interested in 50mm round and 75mm x 75 mm square versions of the VIS wire grid polarizers. Thank you in advance.
besembeson  (posted 2014-10-09 10:39:37.0)
Response from Bweh at Thorlabs: We can provide such larger custom polarizers. I will follow-up with you by email to know which version you would be interested in.
M.Eggens  (posted 2014-09-15 14:57:42.063)
Hi, which material (glue?) is used to bond both substrate and the cover glass? Is the bonding resistant to demineralised water? Thanks
a.andreski  (posted 2014-04-24 10:17:28.55)
Hi. What is the wavefront distortion of these optics? Thanks!
jlow  (posted 2014-05-05 03:35:38.0)
Response from Jeremy at Thorlabs: The transmitted wave front error is typically <1/10 wave.
sayu  (posted 2014-03-24 10:32:48.737)
Can you provide the parallelism of polarizer?
cdaly  (posted 2014-04-10 05:36:57.0)
Response from Chris at Thorlabs: We have a tested value for parallelism spec of less than 1 arcmin. This is a typical value though, not a guarantee. If you would like to have some tested before purchase, we can set this up as a custom for you. I will contact you directly to discuss this further.
ndabashigeo  (posted 2014-02-20 19:17:14.25)
what is the damage threshold of these products at 532 nm pulsed?
jlow  (posted 2014-03-05 11:06:33.0)
Response from Jeremy at Thorlabs: We do not have data for the damage threshold for 532nm but it is estimated to be around 0.08J/cm^2 (blocking) and 0.21 J/cm^2 (passing) for 10ns pulse.
ryseck  (posted 2013-08-20 09:12:33.34)
Dear Ladies and Gentlemen, Do you have data for the damage threshold for wire grid polarizers when using a pulsed Nd:YAG-laser with a wavelength of 266 nm (4th harmonic) and a pulse duration of ~5 ns? Thank you very much, best wishes Gerald Ryseck
jlow  (posted 2013-09-17 16:19:00.0)
Response from Jeremy at Thorlabs. We do not have a spec for the laser damage threshold at 266nm for 5ns pulse. However, based on a past test, the damage threshold should be around 0.05 J/cm^2 (blocking) and 0.15 J/cm^2 (passing), tested with a 13ns pulse width, 100kHz rep rate, 266nm laser.
tcohen  (posted 2013-02-26 14:46:00.0)
Response from Tim at Thorlabs: Thank you for contacting us! You will find nominal transmission and extinction ratio data at 400nm available by clicking on the “Graphs” tab. The WP25M-UB is in stock and available to ship immediately. As for LIDT, we do not currently have data on this. We are looking into this and I have contacted you to keep you updated.
user  (posted 2013-02-11 13:08:34.953)
What mounts are available for the WP25L-UB if manual rotation of the polarizer is needed?
cdaly  (posted 2013-02-14 12:29:00.0)
Response from Chris at Thorlabs: Thank you for using our web feedback. We do not have a mount which would allow for this square optic to be rotated. We have recently released a 25mm round version which lends itself much more easily to being rotated in many of our standard rotation mounts. The part number is WP25M-UB.
tcohen  (posted 2012-05-08 09:31:00.0)
Response from Tim at Thorlabs: Thank you for your feedback! Our wire grid polarizers have a wide acceptance angle allowing for +/- 20 degrees AOI.
user  (posted 2012-05-05 21:08:12.0)
What is the recommended AOI for those polarizets?
tcohen  (posted 2012-03-29 11:31:00.0)
Response from Tim at Thorlabs: Thank you for your feedback! We offer a variety of polarizers to choose from and it is useful for prospective users to have this information before making a decision. Thank you for sharing this information!
user  (posted 2012-03-24 13:57:21.0)
These perform really well, but they also introduce a spectral modulation onto any polychromatic beam incident onto them, presumably due to interference between the sandwiched glass layers. This makes them less useful for spectrally-resolved applications.
bdada  (posted 2012-02-24 10:18:00.0)
Response from Buki at Thorlabs to udierksheide: Thank you for your feedback. We do not currently have tested damage threshold data for these wire grid polarizers but I will look into this further to advise if your light source is suitable. We do not currently have a solution for mounting this polarizer in our SM1 tubes but I will post an update after discussing this with our engineering team.
udierksheide  (posted 2012-02-16 14:02:40.0)
Dear, I would like to know the damage treshhold. I need 10J/cm2 10ns 10Hz @ 532nm or more. Please let me know the treshhold and how I could mount it in a SM1 compatible cube. Regards Uwe Dierksheide
bdada  (posted 2011-10-21 14:18:00.0)
Response from Buki at Thorlabs: To the last two posters, thank you for your feedback and for your interest in our wire grid polarizers. We do not have tested damage threshold data for the wire grid polarizers so we are unsure how it will perform with femtosecond lasers. Fused silica has a GVD of ~53 fs^2/mm from 500-900nm. Please contact TechSupport@thorlabs.com if you have further questions.
shaba82  (posted 2011-10-19 14:18:18.0)
Is this product applicable to femtosecond laser pulses? If it is, can you send me the group-delay dispersion(GDD) data of this product from 500-nm to 900-nm wavelength range?
falk.eilenberger  (posted 2011-09-22 17:05:41.0)
to whom it may concern, I am in need of a polarizer for a high power application of a fs-source. The source is rated at 1.5 Watts average power, with roughly 35fs pulse length (1 kHz) running at 800 (+/- 100) nm. Are your wrie-grid polarizers suitable such a laser beam? Thank you very much in advance Falk Eilenberger

Polarizer Selection Guide

Thorlabs offers a diverse range of polarizers, including wire grid, film, calcite, alpha-BBO, rutile, and beamsplitting polarizers. Collectively, our line of wire grid polarizers offers coverage from the visible range to the beginning of the Far-IR range. Our nanoparticle linear film polarizers provide extinction ratios as high as 100 000:1. Alternatively, our other film polarizers offer an affordable solution for polarizing light from the visible to the Near-IR. Next, our beamsplitting polarizers allow for use of the reflected beam, as well as the more completely polarized transmitted beam. Finally, our alpha-BBO (UV), calcite (visible to Near-IR), rutile (Near-IR to Mid-IR), and yttrium orthovanadate (YVO4) (Near-IR to Mid-IR) polarizers each offer an exceptional extinction ratio of 100 000:1 within their respective wavelength ranges.

To explore the available types, wavelength ranges, extinction ratios, transmission, and available sizes for each polarizer category, click More [+] in the appropriate row below.

Wire Grid Polarizers
Film Polarizers
Beamsplitting Polarizers
alpha-BBO Polarizers
Calcite Polarizers
Quartz Polarizers
Magnesium Fluoride Polarizers
Yttrium Orthovanadate (YVO4) Polarizers
Rutile Polarizers
  • Click on the graph icons in this column to view a transmission curve for the corresponding polarizer. Each curve represents one substrate sample or coating run and is not guaranteed.
  • Mounted in a protective box, unthreaded ring, or cylinder.
  • Available unmounted or in an SM05-threaded (0.535"-40) mount that indicates the polarization axis.
  • Available unmounted or in an SM1-threaded (1.035"-40) mount that indicates the polarization axis.
  • Available unmounted or mounted in cubes for cage system compatibility.
  • Calcite's transmittance of light near 350 nm is typically around 75% (see Transmission column).
  • Available unmounted or in an unthreaded Ø1/2" housing.
  • The transmission curves for calcite are valid for linearly polarized light with a polarization axis aligned with the mark on the polarizer's housing.
  • The 1064 nm V coating corresponds to a -C26 suffix in the item number.
  • Available unmounted or mounted in a protective box or unthreaded cylinder that indicates the polarization axis.

Visible Wire Grid Polarizers: 420 - 700 nm

Specifications
Item # WP12L-VIS WP25M-VIS WP25L-VIS WP50L-VIS
Substrate EAGLE XG
Polarization Wavelength Range 420 - 700 nm
Extinction Ratioa >800:1 (Average Over Wavelength Range)
AR Coatingb 400 - 700 nm (Ravg <1%)
Transmission >83%
Size 12.5 mm x 12.5 mm Ø25.0 mm 25.0 mm x 25.0 mm 50.0 mm x 50.0 mm
Dimensional Tolerance
(Length or Diameter)
±0.2 mm +0.0/-0.1 mm ±0.2 mm
Clear Aperture 10.5 mm × 10.5 mm Ø19 mm 21.0 mm × 21.0 mm 48.0 mm × 48.0 mm
Thickness 1.53 ± 0.20 mm 3.5 ± 0.10 mm 1.53 ± 0.20 mm
Angle of Incidence ±20°
Thermal Expansion 37.6 x 10-7/°C
Surface Quality 80-50 Scratch-Dig
Operating Temperature -40 to 200 °C -40 to 93 °C -40 to 200 °C
  • The extinction ratio (ER) is the ratio of maximum to minimum transmission of a linearly polarized input. When the transmission axis and input polarization are parallel, the transmission is at its maximum; rotate the polarizer by 90° for minimum transmission.
  • Deposited on the back of substrate and on both sides of the cover glass.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
WP12L-VIS Support Documentation
WP12L-VIS12.5 mm x 12.5 mm Wire Grid Polarizer, 420-700 nm
$139.73
Today
WP25M-VIS Support Documentation
WP25M-VISCustomer Inspired! Ø25.0 mm Mounted Wire Grid Polarizer, 420-700 nm
$282.61
Today
WP25L-VIS Support Documentation
WP25L-VIS25.0 mm x 25.0 mm Wire Grid Polarizer, 420-700 nm
$196.46
Today
WP50L-VIS Support Documentation
WP50L-VIS50.0 mm x 50.0 mm Wire Grid Polarizer, 420-700 nm
$618.80
Today

Ultra Broadband Wire Grid Polarizers: 250 nm - 4 µm

Specifications
Item # WP12L-UB WP25M-UB WP25L-UB WP50L-UB
Substrate Fused Silica
Polarization Wavelength Range 250 nm - 4 µm
Extinction Ratioa 250 nm - 4 µm: >10:1
300 nm - 4 µm: >100:1
600 nm - 4 µm: >1000:1
2.25 µm - 4 µm: >10 000:1
Transmission >75% (@ 450 nm)
Size 12.5 mm x 12.5 mm Ø25.0 mm 25.0 mm x 25.0 mm 50.0 mm x 50.0 mm
Dimensional Tolerance
(Length or Diameter)
±0.4 mm +0.0/-0.1 mm ±0.4 mm
Clear Aperture 10.5 mm × 10.5 mm Ø19 mm 21.0 mm × 21.0 mm 48.0 mm × 48.0 mm
Thickness 2.2 mm ±0.3 mm 3.5 mm 2.2 ±0.3 mm
Angle of Incidence ±20°
Thermal Expansion 5.5 x 10-7/°C
Surface Quality 80-50 Scratch-Dig
Operating Temperature -40 to 200 °C -40 to 93 °C -40 to 200 °C -40 to 200 °C
  • The extinction ratio (ER) is the ratio of maximum to minimum transmission of a linearly polarized input. When the transmission axis and input polarization are parallel, the transmission is at its maximum; rotate the polarizer by 90° for minimum transmission.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
WP12L-UB Support Documentation
WP12L-UB12.5 mm x 12.5 mm Wire Grid Polarizer, 250 nm to 4 µm
$817.37
Today
WP25M-UB Support Documentation
WP25M-UBCustomer Inspired! Ø25.0 mm Mounted Wire Grid Polarizer, 250 nm to 4 µm
$1,085.27
Today
WP25L-UB Support Documentation
WP25L-UB25.0 mm x 25.0 mm Wire Grid Polarizer, 250 nm to 4 µm
$1,011.73
Today
WP50L-UB Support Documentation
WP50L-UB50.0 mm x 50.0 mm Wire Grid Polarizer, 250 nm to 4 µm
$1,739.79
Today
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