Create an Account  |   Log In

View All »Matching Part Numbers


Your Shopping Cart is Empty
           

alpha-BBO Glan-Laser Polarizers


Related Items







alpha-BBO Glan-Laser Polarizers

Alpha-BBO Glan-Laser Polarizers Divert S-Polarization, Leaving a Very Pure P-Polarized Beam (Aligned with the "Polarization Axis" Mark on the Housing) Passing Through the Polarizer

Transmission
Click to Enlarge

(Click Here for Raw Data)

Features

  • Extinction Ratio: 100,000:1
  • Fabricated from the Highest-Grade, Laser-Quality α-BBO
  • Three Available Coatings
    • 210 - 450 nm (centered at 266 nm), Ravg < 1.5%
    • 220 - 370 nm, Ravg < 0.5%
    • VAR for 405 nm, Ravg < 0.25%
  • High Damage Threshold: 5 J/cm2 (10 ns pulse, 10 Hz, Ø0.347 mm Spot Size, @ 355 nm)
  • Low Scatter
  • Wavefront Distortion ≤ λ/8 Over Clear Aperture (Excluding Side Ports)
  • Surface Quality
    • 20/10 Scratch-Dig on Input and Exit Faces
    • 40/20 Scratch-Dig on Side Ports
  • Air-Spaced Design

The Glan-Laser α-BBO Polarizer is specifically designed to deal with high-energy, short-wavelength laser light. Like our Glan-Taylor and Glan-Laser Calcite Polarizers, these polarizers are ideal for applications requiring extremely high polarization purity (100,000:1), high damage threshold (5 J/cm2, 10 ns pulse, 10 Hz, 0.347 mm Spot Size, @ 355 nm), and transmisison in the UV (210 - 450 nm).

Two polished side exit ports are provided to allow bidirectional use of the prism polarizer. These side ports also ensure that the rejected light from high-power lasers can safely exit the polarizer. Glan-Laser Polarizers are designed to work with well collimated light beams. Divergent beams will produce multiple output beams.

The polarizers are available with three antireflection coatings: a single-layer MgF2 antireflection coating (SLAR-MgF2), a UV AR coating, or a V Coating optimized for 405 nm. The SLAR coating features good broadband UV performance with low reflectance (<1.5%) from 210 to 450 nm while the UV AR coating provides exceptionally low reflectance (<0.5%) from 220 to 370 nm. The 405 nm V coating provides even less reflectance (<0.25%) than the UV coating at 405 nm. See the Graphs tab for more information.

The input and output faces are polished to a laser quality 20-10 scratch-dig surface finish to minimize scattering of the transmitted P polarization component of the laser beam or light field. The S polarization component is reflected at a 61o angle (wavelength dependent) and exits the polarizer through one of the two side ports.

For compatibility with Thorlabs' selection of rotation mounts and other optomechanics, these polarizers can be mounted in our Polarizing Prism Mounts, which are available for both 5 mm (SM05PM5) and 10 mm polarizers (SM1PM10). Thorlabs also provides Glan-Taylor polarizers.

Item #GLB5GLB10
Extinction Ratioa100,000:1
MaterialLaser Quality α-BBO
(Low Scatter)
DesignHigh Laser Damage Threshold
Air-Spaced Design
Transmission Range210 - 450 nm
Available AR CoatingsbSLAR MgF2 (210 - 450 nm), Ravg< 1.5%
UV (220 - 370 nm), Ravg< 0.5%
V-Coat (405 nm), Ravg< 0.25%
Damage Threshold5 J/cm2 (10 Hz, Ø0.347 mm Spot Size, 10 ns Pulses @ 355 nm)
Wavefront Distortion≤ λ/8 Over Clear Aperture
Surface Quality (Input and Output Faces)20/10 Scratch/Dig
Surface Quality (Side Ports)40/20 Scratch/Dig
Aperture5 mm x 5 mm10 mm x 10 mm
Prism Dimensions (W x L)6.5 mm x 7.5 mm12 mm x 13.7 mm
  • Extinction ratio is only for the output ray (see drawing below). Measured at 405 nm and 355 nm. The extinction ratio (ER) is the ratio of the maximum transmission of a linear polarized signal when the polarizer’s axis is aligned with the signal to the minimum transmission when the polarizer is rotated by 90°.
  • The escape windows (perpendicular to input / exit faces) are not coated. See the Graphs Tab for more information.
Note: Since α-BBO is a relatively soft material, care must be taken when cleaning. The coated faces of the polarizer can be gently cleaned with solvent and air. The escape faces (perpendicular to the input / exit faces) are also extremely delicate. Do not touch any faces if possible. Cleaning should be light and at a glancing angle. If these surfaces must be wiped, use only solvent-moistened cotton or untreated facial tissues.

Field of View Angle Orientation

Alpha-BBO FOV
A significant amount of scattered unpolarized light escapes the polarizers. As a result, the escape ray (o-ray) is not purely polarized and should not be used for polarization dependent applications.

The typical transmission and reflectivity of the α-BBO Glan-Laser polarizers are shown in the graphs below. The blue shading indicates the region for which the AR coating is optimized (see Specs tab for more information). The reflectivity plots represent the performance of the coating only, not including internal losses of the polarizer. The transmission plots include both both reflectivity and transmission through the polarizer (including any internal losses).


The plots below apply to the GLB10 and GLB5 α-BBO Glan-Laser polarizers.

The plots below apply to the GLB10-UV and GLB5-UV α-BBO Glan-Laser polarizers.

The plots below apply to the GLB10-405 and GLB5-405 α-BBO Glan-Laser polarizers.

Note: Short wavelength cutoff is due to the cut angle of the α-BBO prism not the reflectivity or transmission of the material.

UV Glan-Laser Polarizer Schematic Diagram

Glan Laser Specifications

Item #GLB5GLB10
W6.5 mm12 mm
L7.5 mm13.7 mm
A9.5 mm16 mm
B12.7 mm19.2 mm

Polarization-Dependent Refraction - Glan Laser α-BBO Polarizer


Polarization-Dependent Refraction

Transmission

Thorlabs uses only the highest quality synthetic α-BBO in our polarizing prisms. The transmission curves of the α-BBO polarizers are shown below. These curves also represent the transmission of the GLB5, GLB5-UV, and GLB5-405, respectively. Variations during the manufacturing of the α-BBO crystal affect the transmission curve and the damage threshold rating.

General

Thorlabs' α-BBO polarizers are all based on high-grade, birefringent, α-BBO crystals. Due to the birefringent structure of α-BBO, a differential delay is created between two orthogonally polarized waves traveling in the crystal. As shown in the image to the right, this birefringent structure creates a polarization-dependent refraction that effectively steers the polarization planes in two angles. While the extraordinary plane will travel straight through the crystal, the ordinary plane will exit the crystal at an angle proportional to the wavelength as well as the length of the crystal.

A Glan-Laser or Glan-Taylor polarizer can be designed as either a polarization splitter/combiner or as a polarizer element that removes the angled, orthogonally polarized component of a beam. Our polarizers are typically built out of two prisms, as shown in the drawing to the right. Since α-BBO is a soft crystal that is easily damaged, all of our α-BBO polarizers are offered in metal housings. With convenient threadings and adapters, these housings can easily be mounted into our opto-mechanical products.

Field of View

α-BBO polarizers feature a field of view (FOV) that varies with both wavelength and entrance orientation. The FOV of these prisms must be considered during alignment and collimation procedures. The FOV on the side which rejects the o-ray (FOV 1) has a decreasing FOV with increasing wavelength. The opposite side (FOV 2) has a FOV that increases at longer wavelengths.

Field of View Angle Orientation

Alpha-BBO FOV

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 high thresholds for laser damage, up to 25 W/cm2, as well as 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), and rutile (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
Polarizer TypeWavelength RangeExtinction RatioTransmissionaAvailable Sizes
Wire Grid Polarizers on Glass Substrates420 nm - 700 nm>800:112.5 mm x 12.5 mm, Ø25.0 mmb,
25.0 mm x 25.0 mm,
and 50.0 mm x 50.0 mm
250 nm - 4 µm>10:1 from 250 nm - 4 µm
>100:1 from 300 nm - 4 µm
>1000:1 from 600 nm - 4 µm
>10,000:1 from 2.25 µm - 4 µm
12.5 mm x 12.5 mm, Ø25.0 mmb,
25.0 mm x 25.0 mm,
and 50.0 mm x 50.0 mm
Holographic Wire Grid Polarizers2 µm - 12 µm150:1 at 3 µm
300:1 at 10 µm
Ø25.0 mmb and Ø50.0 mmb
2 µm - 9 µm150:1 at 3 µm
300:1 at 8 µm
2 µm - 30 µm150:1 at 3 µm
300:1 at 15 µm
2 µm - 18 µm150:1 at 3 µm
300:1 at 10 µm
MIR Wire Grid Polarizers on Silicon Substrates3 µm - 5 µm>1000:112.5 mm x 12.5 mmb, Ø25.0 mmb,
25.0 mm x 25.0 mmb,
and 50.0 mm x 50.0 mmb
7 µm - 15 µm>10,000:112.5 mm x 12.5 mmb, Ø25.0 mmb,
25.0 mm x 25.0 mmb,
and 50.0 mm x 50.0 mmb
Film Polarizers
Polarizer TypeWavelength RangeExtinction RatioTransmissionaAvailable Sizes
Nanoparticle Linear Film Polarizers365 nm - 395 nm>1000:1 from 365 nm - 395 nm
>10,000:1 from 369 nm - 390 nm
>100,000:1 from 372 nm - 388 nm
Ø12.5 mmc and Ø25.0 mmd
480 nm - 550 nm>10,000:1 from 480 nm - 550 nmØ12.5 mmc and Ø25.0 mmd
500 nm - 720 nm>10,000:1 from 500 nm - 720 nmØ12.5 mmc and Ø25.0 mmd
550 nm - 1500 nm>10,000:1 from 550 nm - 1500 nm
>100,000:1 from 600 nm - 1200 nm
Ø12.5 mmc and Ø25.0 mmd
650 nm - 2000 nm>1000:1 from 650 nm - 2000 nm
>10,000:1 from 750 nm - 1800 nm
>100,000:1 from 850 nm - 1600 nm
Ø12.5 mmc and Ø25.0 mmd
1 µm - 3 µm>1000:1 from 1 µm - 3 µm
>10,000:1 from 1.2 µm - 3 µm
Ø12.5 mmc and Ø25.0 mmd
1.5 µm - 5 µm>1000:1 from 1.5 µm - 5 µm
>10,000:1 from 2 µm - 4.5 µm
Ø12.5 mmc and Ø25.0 mmd
Economy Film Polarizers400 nm - 700 nm>100:1 from 400 nm - 500 nm
>1000:1 from 500 nm - 700 nm
>5000:1 from 530 nm - 690 nm
2" x 2"
Economy Laminated Film Polarizers400 nm - 700 nm>100:1 from 400 nm - 500 nm
>1000:1 from 500 nm - 700 nm
>5000:1 from 530 nm - 690 nm
Ø1/2", Ø1", and Ø2"
600 nm - 1100 nm>1000:1 from 600 nm - 950 nm
>400:1 from 600 nm - 1100 nm
Ø1/2", Ø1", and Ø2"
1100 nm - 1630 nm>5000:1 from 1300 nm - 1400 nm
>1000:1 from 1260 nm - 1480 nm
>100:1 from 1100 nm - 1630 nm
Ø1/2", Ø1", Ø2"
Beamsplitting Polarizers
Polarizer TypeWavelength RangeExtinction RatioTransmissionaAvailable Sizes
Polarizing Plate Beamsplitters532 nm10,000:1Ø1"
633 nm
780 nm
808 nm
1064 nm
1550 nm
Broadband Polarizing Beamsplitter Cubes
(Unmounted, 16 mm Cage Cube, or 30 mm Cage Cube)
420 nm - 680 nm1000:15 mm, 10 mm, 1/2", 20 mme, and 1"e
620 nm - 1000 nm
900 nm - 1300 nm
1200 nm - 1600 nm
Wire Grid Polarizing Beamsplitter Cubes (Unmounted)400 nm - 700 nm>1000:11"
Laser-Line Polarizing Beamsplitter Cubes
(Unmounted or 30 mm Cage Cube)
532 nm3000:11"e
633 nm
780 nm
980 nm
1064 nm
1550 nm
High-Power Laser-Line Polarizing Beamsplitter Cubes
(Unmounted or 30 mm Cage Cube)
405 nm2000:11"e
532 nm
780 - 808 nm
1064 nm
alpha-BBO Polarizers
Polarizer TypeWavelength RangeExtinction RatioTransmissionaAvailable Sizes
alpha-BBO Glan-Laser Polarizers210 nm - 450 nm100,000:15 mmb and 10 mmb
(Clear Aperture, Square)
220 nm - 370 nm
405 nm
Calcite Polarizers
Polarizer TypeWavelength RangeExtinction RatioTransmissiona,gAvailable Sizes
Glan-Laser Calcite Polarizers350 nmf - 2.3 µm (Uncoated)100,000:15 mmb, 10 mmi, and 15 mmb
(Clear Aperture, Square)
350 nmf - 700 nm (A Coated)
650 nm - 1050 nm (B Coated)
1050 nm - 1700 nm (C Coated)
1064 nm (V Coated)h
Glan-Taylor Calcite Polarizers350 nmf - 2.3 µm (Uncoated)5 mmb, 10 mmb, and 15 mmb
(Clear Aperture, Square)
350 nmf - 700 nm (A Coated)
650 nm - 1050 nm (B Coated)
1050 nm - 1700 nm (C Coated)
Glan-Thompson Calcite Polarizers
(Unmounted or Mounted)
350 nmf - 2.3 µm (Uncoated)5 mmi and 10 mmi
(Clear Aperture, Square)
350 nmf - 700 nm (A Coated)
650 nm - 1050 nm (B Coated)
Double Glan-Taylor Calcite Polarizers350 nmf - 2.3 µm (Uncoated)9 mmb
(Clear Aperture, Square)
Calcite Beam Displacers350 nmf - 2.3 µm (Uncoated)10 mmb
(Clear Aperture, Square)
Wollaston Prism Polarizers350 nmf - 2.3 µm (Uncoated)10 mmi
(Clear Aperture, Square)
350 nmf - 700 nm (A Coated)
650 nm - 1050 nm (B Coated)
Rutile Polarizers
Polarizer TypeWavelength RangeExtinction RatioTransmissionaAvailable Sizes
Rutile TiO2 Polarizers2.2 µm - 4 µm100,000:19.1 mm x 9.5 mm x 9.5 mmb and
10.7 mm x 15.9 mm x 15.9 mmb
  • 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 that indicates the polarization axis.
  • 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).
  • 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.
Loading Tag Cloud Loading...

Please Give Us Your Feedback
 
Email   Feedback On
(Optional)
Contact Me:
Your email address will NOT be displayed.
 
 
Please type the following key into the field to submit this form:
Click Here if you can not read the security code.
This code is to prevent automated spamming of our site
Thank you for your understanding.
  
 
Would this product be useful to you?       Little Use   1 2 3 4Very Useful

Enter Comments Below:
 
Characters remaining 8000    
Posted Comments:
Poster: rudolph
Posted Date: 2013-05-31 05:41:53.29
Können Sie 3 Stück a-BBO Glan-Laser Polarisatoren mit freier Apertur 5mm ohne Beschichtung anbieten?
Poster: jlow
Posted Date: 2013-05-31 10:36:00.0
The coating serves as protection to the alpha-BBO. We will contact you to discuss this further along with other possible solutions.
Click on any phrase below to search our site using our new Search Engine:
a-BBO polarizer   air spaced alpha BBO polarizer   BaB2O4   Barium Boron Oxide   beamsplitter   calcite prism polarizer   glan laser   glan laser polarizer   glan polarizer   high er polarizer   high power BBO polarizer   high power glan polarizer   high power polarizer   ir optics   linear polarizer   non-linear optic   polarization   PRM1   uv polarizer  
Glan-Laser alpha-BBO Polarizer, SLAR Coating
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
GLB5 Support Documentation
GLB5 Glan-Laser alpha-BBO Polarizer, 5.0 mm CA, SLAR MgF2 (210 - 450 nm)
$652.80
Today
GLB10 Support Documentation
GLB10 Glan-Laser alpha-BBO Polarizer, 10.0 mm CA, SLAR MgF2 (210 - 450 nm)
$765.00
Today
Glan-Laser alpha-BBO Polarizer, UV Coating
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
GLB5-UV Support Documentation
GLB5-UV Glan-Laser alpha-BBO Polarizer, 5.0 mm CA, UV Coating (220 - 370 nm)
$703.80
Today
GLB10-UV Support Documentation
GLB10-UV Glan-Laser alpha-BBO Polarizer, 10.0 mm CA, UV Coating (220 - 370 nm)
$816.00
Today
Glan-Laser alpha-BBO Polarizer, 405 nm V-Coated
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
GLB5-405 Support Documentation
GLB5-405 Glan-Laser alpha-BBO Polarizer, 5.0 mm CA, V Coated (405 nm)
$703.80
Today
GLB10-405 Support Documentation
GLB10-405 Glan-Laser alpha-BBO Polarizer, 10.0 mm CA, V Coated (405 nm)
$816.00
Today
Log In   |   My Account  |   Contact Us  |   Privacy Policy  |   Home  |   Site Index
Regional Websites: West Coast US | Europe | Asia | China | Japan
Copyright 1999-2014 Thorlabs, Inc.
Sales: 1-973-579-7227
Technical Support: 1-973-300-3000


High Quality Thorlabs Logo 1000px: Save this Image