Yttrium Orthovanadate (YVO₄) Beam Displacers
![](https://www.thorlabs.com/Images/GuideImages/8754_YVO4_Displacers_2.jpg)
- Separate an Input into Two Orthogonally Polarized Beams
- Yttrium Orthovanadate Substrate is Transparent from 488 nm to 3.4 µm
- Option for 2000 nm V-Coated Beam Displacers, R < 0.25%
- Mounted and Unmounted Optics
BDY12
Mounted Beam Displacer
BDY12U
Unmounted Beam Displacer
Application Idea
A BDY12-2000 Mounted Beam Displacer Attached to a Rotation Mount Using a Ø1/2" Lens Tube
BDY12-2000
Mounted Beam Displacer
![](../../images/loading-red.gif)
Please Wait
Item # | BDY12(U) | BDY12(U)-2000 |
---|---|---|
Substrate Materiala | Yttrium Orthovanadate (YVO4) | |
Substrate Spectral Range (Click for Graph) |
488 nm - 3.4 µm | |
AR Coating (Click for Graph) | N/A | 2000 nm V Coating |
AR Coating Reflectance (0° AOI) | R < 0.25% at 2000 nm | |
Beam Separation (@ 2000 nm) |
1.2 mm | |
Clear Aperture | >3 mm x 5 mm Ellipse | |
Beam Deviation | <30 arcsec Between Output Beams | |
Surface Flatness | λ/10 at 633 nm | |
Surface Quality | 40-20 Scratch-Dig |
![BDY12 Beam Displacement](https://www.thorlabs.com/images/TabImages/Yttrium_Beam_Displacer_A1-200.gif)
Click to Enlarge
Birefringent Beam Displacers Seperate Unpolarized Light into Two Orthogonally Polarized Beams
Birefringent Crystal Beamsplitters | ||
---|---|---|
Type | Ordinary Ray Anglea | Extraordinary Ray Anglea |
Calcite Beam Displacers | Parallel | Parallel |
YVO4 Beam Displacers | ||
Rochon Prisms | Parallel | Deviated |
Wollaston Prisms | Deviated | Deviated |
Features
- Two Orthogonally Polarized Output Beams
- 1.2 mm Beam Displacement at 2000 nm
- Available Uncoated or V-Coated at 2000 nm
- Outputs Beams Parallel within 30 arcsec
- Transparent from 488 nm to 3.4 μm
- Available Unmounted or Mounted in a Ø1/2" Housing
Beam displacing prisms are used to separate an input beam into two orthogonally polarized output beams and can be used as polarizing beamsplitters in applications where the 90° separation generated by polarizing beamsplitter cubes is not desired. Fabricated from yttrium orthovanadate (YVO4), these beam displacers provide a beam separation of 1.2 mm at a wavelength of 2000 nm and can be used with wavelengths from 488 nm to 3.4 μm (see Graphs tab). This beam separation sets an upper limit to the beam size that is appropriate for use with these polarizers. Our D-shaped mirrors are ideal for picking off one of the two polarized beams.
These YVO4 beam displacers are available uncoated or with a V coating that provides <0.25% reflectance at 2000 nm (see the Graphs tab). The BDY12 and BDY12-2000 beam displacers are mounted in Ø1/2" anodized aluminum housings for compatibility with our Ø1/2" lens tubes and Ø1/2" rotation mounts, while the BDY12U and BDY12U-2000 beam displacers are unmounted 12.0 mm x 6.0 mm x 4.0 mm (0.47" x 0.24" x 0.16") optics. All of these beam displacers produce output beams that are parallel to each other to within 30 arcsec.
In addition to these beam displacers, Thorlabs also offers a complete line of polarizers made from a variety of materials, including α-BBO, calcite, quartz, and rutile. We also produce a wide range of other polarization optics and polarization instrumentation.
![BDY12 Beam Displacement](https://www.thorlabs.com/images/TabImages/Standard_2000nm_V_ARC_450.gif)
Click to Enlarge
Click Here for Raw Data
Reflectance for the BDY12-2000 and BDYU12-2000 Beam Displacers
![BDY12 Beam Displacement](https://www.thorlabs.com/images/TabImages/YVO4_Beam_Displacement_450.gif)
Click to Enlarge
Click Here for Raw Data
The linear separation between the orthogonally polarized output beams varies with wavelength.
Posted Comments: | |
施 议焕
 (posted 2023-10-26 20:27:22.847) 你好,
请问你们这款产品可以用于合束吗? 或者你们有哪款产品可以用于2.8um波段的合束
祝好!!!!! cdolbashian
 (posted 2023-10-26 01:23:29.0) Thank you for reaching out to us with this inquiry. You are asking if these beam displacers can be used to combine beams. You indeed could use these to combine beams of orthogonal polarization states, though significant effort would need to be applied in order to have these two beams combine and exit the displacer colinearly. nachmen gelbach
 (posted 2021-05-24 20:22:17.057) Hi! I wanted to ask, what is the damage threshold of the BDY12-2000? YLohia
 (posted 2021-05-24 01:46:19.0) Hello, thank you for contacting Thorlabs. Please see the comment regarding the damage threshold of BDY12-2000 below. dodd
 (posted 2018-08-23 17:18:42.357) Does the BDY12-2000 have a known damage threshold? I would like to use it as a polarizing beamsplitter for a 5W CW tunable laser operating in the 2-2.5um wavelength range. Any advice you could provide would be greatly appreciated. Thanks! YLohia
 (posted 2018-08-27 08:35:48.0) Hello, thank you for contacting Thorlabs. Unfortunately, we do not have a specified damage threshold for the BDY12-2000. That being said, preliminary tests indicate that a CW 5W laser beam with a beam diameter greater than 0.5mm should be fine for the 2-2.4um range. Additionally, >15 J/cm2 @ 20ns, 20Hz @ 1064nm is also expected to be fine in a pulsed application. |
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 |
---|
![Back to Top Back to Top](https://www.thorlabs.com/images/arrow_Vert.gif)
![Beam Displacer Mechanical Dimensions](https://www.thorlabs.com/images/TabImages/BDYU12_D2-450.gif)
Schematic of the BDY12U Unmounted YVO4 Beam Displacer
- Unmounted YVO4 Beam Displacers
- Produces Two Orthogonally Polarized Output Beams
- Available Uncoated or V-Coated at 2000 nm
These Unmounted Beam Splitters are compact [0.47" x 0.24" x 0.16" (12.0 mm x 6.0 mm x 4.0 mm)], making them ideal for use in OEM applications. They split an input beam into two output beams with orthogonal polarization. The uncoated beam splitter provides excellent transmission from 488 nm to 3.4 µm, while the 2000 nm V-coat minimizes the reflectance at 2000 nm. The line on the beam splitter indicates the optic axis. They can be mounted in a kinematic platform mount or a tip, tilt, and rotation stage.
![Back to Top Back to Top](https://www.thorlabs.com/images/arrow_Vert.gif)
![Beam Displacer Mechanical Dimensions](https://www.thorlabs.com/images/TabImages/BDYM12M_D1.gif)
Schematic of the BDY12 Mounted YVO4 Beam Displacer
- YVO4 Beam Displacers Mounted in a Ø1/2" Housing
- Produces Two Orthogonally Polarized Output Beams
- Available Uncoated or V-Coated at 2000 nm
- Compatible with SM05 Lens Tube Systems
These Mounted Beam Splitters are seated in Ø1/2" anodized aluminum housings. This housing fits inside our Ø1/2" lens tubes, making them compatible with our Ø1/2" rotation mounts. These beam splitters split an input beam into two output beams with orthogonal polarization. The uncoated beam splitter provides excellent transmission from 488 nm to 3.4 µm, while the
2000 nm V-coat minimizes the reflectance at 2000 nm.