High-Performance Glan-Laser Polarizers

Did You Know?

Glan-Laser Polarizers are mounted, polarizing prisms used in applications that require broad spectral ranges, high extinction ratios, or high polarization purities. These polarizers transmit extraordinary rays while reflecting ordinary rays, and are designed to minimize both beam scatter and distortion. Glan-Laser Polarizers utilize an advanced polishing technique for minimizing surface scatter and feature two escape windows for passing the high power rejected light. Glan-Laser Polarizers offer high damage thresholds, ideal for use in laser applications. They are also suitable for demanding applications requiring extreme polarization purity and high resistance to laser damage.

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Frequently Asked Questions

A Glan-Laser Polarizer is a high-extinction linear polarizer made from two birefringent prisms (typically calcite or α-BBO) cemented or air-spaced and operated in transmission. It uses birefringence to separate the ordinary and extraordinary rays: one polarization is totally internally reflected and absorbed or dumped, while the transmitted beam is highly linearly polarized with very low depolarization, suitable for high-power laser use.

Overview of Glan-Laser Polarizers

Glan-Laser Polarizers are high-extinction, air-spaced calcite or alpha-BBO prism assemblies designed for linearly polarized laser beams. They exploit birefringence to transmit one polarization state (extraordinary ray) while rejecting the orthogonal state (ordinary ray), making them suitable for precision polarization control in coherent light transport systems.

Unlike cemented Glan-type polarizers, Glan-Laser Polarizers use an air gap between the prisms to increase laser damage threshold and reduce absorption, which is critical for high-peak-power and UV applications. Their design also minimizes beam deviation and maintains good transmission across a defined spectral band.

Typical Specifications and Use Cases

On FindLight you will find Glan-Laser Polarizers with parameters such as:

  • Material: Calcite for visible–NIR; alpha-BBO for UV–visible ranges.
  • Wavelength range: Commonly from ~220 nm (BBO) up to 2.3 μm (calcite), optimized for specific laser lines.
  • Extinction ratio: Typically 105:1 or higher for the transmitted polarization.
  • Clear aperture: From a few millimeters up to ~10–12 mm, depending on model.
  • Acceptance angle: Narrow acceptance angles consistent with Glan-Laser geometry.
  • Damage threshold: Specified separately for CW (W/cm²) and pulsed (J/cm²) operation.
  • AR coatings: Single- or multi-wavelength anti-reflection coatings on input/output faces.

Typical use cases for Glan-Laser Polarizers include laser line cleanup, polarization-sensitive imaging, nonlinear optics experiments, optical isolation (in combination with Faraday rotators), and precise control of polarization in interferometers and metrology setups.

Buyer Guidance on FindLight

When selecting Glan-Laser Polarizers on FindLight, compare the specified wavelength range and AR coatings against your laser source to minimize loss and back-reflection. Check extinction ratio requirements for your measurement sensitivity, and verify clear aperture and acceptance angle relative to your beam diameter and divergence.

For high-power or ultrafast systems, pay close attention to the listed damage thresholds and the choice between calcite and BBO. Use the platform tools to compare multiple Glan-Laser Polarizers side by side, then request quotes directly from suppliers—no registration is required to initiate technical inquiries or pricing requests.