Beamsplitter Family

Beamsplitter Family

Data Sheets

  • Parallel or orthogonal output beams
  • Near-distortionless beam splitting
  • Multiple geometries
  • Standard and custom products available

Keysight beamsplitter family

Overview

The Keysight Technology, Inc. family of high-performance beamsplitters offers industry-leading polarization and beam control with low wavefront distortion. For more than 35 years, Keysight has designed and produced beamsplitters exclusively for the most demanding custom interferometry applications. Today, optics produced using these high-precision design and manufacturing techniques are available in a variety of standard and custom products.

Keysight’s family of precision beam­splitters split light by polarization, amplitude, or wavelength. They are available in cube, plate, and displace­ment geometries. In both standard and custom models, Keysight beam­splitters deliver a high-level of perfor­mance and consistency that optical designers can count on. They offer a range of choices to meet current and emerging applications in aerospace and defense, homeland security, bio­technology, scientific instrumentation, and nanotechnology measurement.

Flexibility

Keysight’s beamsplitter product family is designed with the flexibility to meet unique system requirements. Key­sight’s standard beamsplitters sepa­rate an input beam into two or more output beams based on polarization, amplitude, or wavelength. Standard products are available at laser wave­lengths from 193 to 1550 nm. For ap­plications requiring orthogonal output beams, Keysight offers cube and plate geometries. For applications requiring a precise parallel or lateral displace­ment of output beams, Keysight’s standard displacement beamsplitters are available with arcsecond accu­racy. Custom beamsplitters are also available for applications requiring non-standard wavelengths or geometries.

Proven reliability

More than 10,000 Keysight optical assemblies have shipped, attesting to our ability to design, fabricate, and deliver high-quality optical products and assemblies. Keysight optics are used by leading semiconductor equip­ment, aerospace and defense, and test and measurement companies for precise beam control.

Applications

  • Distance interferometry
  • Polarization recovery
  • Beam steering

Key benefits

  • Convenient splitter geom­etries
  • Large clear aperture
  • Precise beam positioning

Polarizing beamsplitters

Keysight’s polarization beamsplitters are designed to transmit p-polarized light, and reflect or displace s-polarized light. Standard and custom configura­tions are available for optical instru­mentation, laser interferometry, and biomedical applications. Geometries that separate the output beams by 90° (cube beamsplitters) are available, as are geometries that displace the output beams, which remain parallel (displacement beamsplitters); other geometries are available on a custom basis.

Polarizing cube beamsplitters

Keysight’s standard polarization beam splitting cubes separate the orthog­onally-polarized output beams by 90° with an accuracy of five arcmin­utes; custom models are available with arcsecond accuracy. Keysight’s proprietary bonding and coating procedures ensure each output has a very high contrast (1,000:1) and low transmitted wavefront distortion (TWD) of λ/8.

Polarizing displacement beamsplitters

Where applications require parallel output beams, Keysight’s standard displacement beamsplitters provide the same industry-leading contrast ratio and TWD in a compact optic that displaces the beam with 25 arcsecond parallelism. Keysight’s BK7 displace­ment beamsplitters offer the func­tionality of crystal beam displacers and are more durable, withstanding scratches and stains. In addition, Keysight’s displacement beamsplitters are more compact, as the size is not a function of the beam separation.

As a result, Keysight’s standard beam­splitters are offered with the small separations enabled by crystal beam displacers, or large separations that are impractical with the traditional materials.

Applications

  • Available with parallel or orthogonally propagating output beams
  • 1,000:1 contrast in both output beams
  • λ/8 TWD in both output beams
  • arcsecond beam parallelism

Benefits

  • Compact size
  • Near-distortionless output
  • Accurate output beam placement
  • Symmetrical performance

Non-polarizing beamsplitters

Keysight’s standard non-polarizing beamsplitter configurations sepa­rate the input beam into two output beams; custom configurations can split the input beam into three or more output beams. Non-polarizing beam­splitters are used in a variety of applications in optical instrumen­tation to distribute fractions of an input beam to other optical sub-as­semblies. Standard 50/50 beamsplit­ters are available in cube, plate, and displacement configurations. Custom beamsplitters are available with the specific split ratios that your applica­tion requires.

Non-polarizing cube beamsplitters

Keysight’s non-polarizing beamsplit­ter cubes accurately separate the output beams by 90°, while Keysight’s proprietary coating processes ensure that each output beam maintains the polarization of the input beam and maintains a low wavefront distortion of λ/8.

Non-polarizing plate beamsplitters

Keysight’s Standard plate beamsplit­ters also separate the output beams by 90° and offer a λ/10 wavefront distortion.

Non-polarizing displacement beamsplitters

Where applications require the output beams to be parallel, Keysight’s stan­dard displacement beamsplitters offer industry-leading parallelism, accurate to 25 arcseconds.

Applications

  • Available with parallel or or­thogonally propagating output beams
  • Accurate polarization preser­vation in output beams
  • λ/8 to λ/10 TWD in both beams
  • 50/50, 33/66, and other split ratios available

Benefits

  • Compact size
  • Accurate output beam placement
  • Near-distortionless output
  • Symmetrical performance

Dichroic Filters and Mirrors

Keysight’s chromatic beamsplitters separate the input light into two output beams. Standard products are available as plate beamsplitters and transmit a narrow wavelength band (bandpass filters); custom beamsplit­ters are available that reflect a specific bandwith (notch filters), or transmit all wavelengths above a specific center wavelength (long-wave pass) or below a specific center wavelength (short-wave pass), while reflecting the rest.

Features

  • High pass-band transmission/Low stop-band transmission
  • Sharp spectral transitions
  • Environmentally robust
  • Thin substrate for minimal beam displacement
  • Arcsecond wedge
  • λ/10 TWD in both output beams

Benefits

  • Convenient size for integration in standard mechanical mounts
  • Near-distortionless output