PBS12-532-HP

• Designed specifically for 532 nm laser systems.
• High-power optical design for demanding CW and pulsed laser applications.
• Very high extinction ratio: Tp >2,000:1.
• High transmission efficiency: Tp >95%.
• High reflection efficiency: Rs >99.5%.
• High laser damage resistance: >10 J/cm² for 532 nm pulsed lasers.
• CW damage threshold: 350 W/cm at 532 nm for a 1 mm beam diameter.
• Manufactured from UV Fused Silica for excellent optical performance and thermal stability.
• Epoxy-free optical contact at the internal beamsplitter interface minimizes absorption and scattering losses.
• 1/2" (12.7 mm) cube size for compact optical system integration.
• 20-10 scratch-dig surface quality for high-quality optical performance.
• High surface flatness: λ/10 at 633 nm.
• Designed to transmit P-polarized light and reflect S-polarized light.

The Thorlabs PBS12-532-HP is a 1/2" high-power polarizing beamsplitter cube optimized for 532 nm laser applications.

The cube separates incident light according to its polarization state by transmitting the P-polarized component while reflecting the S-polarized component. The transmitted beam provides an extinction ratio of Tp >2,000:1, while the transmission efficiency for P-polarized light is greater than 95%. The S-polarized reflection efficiency is greater than 99.5%, making the cube suitable for high-performance polarization separation and laser beam routing.

A major advantage of the PBS12-532-HP is its high-power capability. For pulsed operation at 532 nm, Thorlabs specifies a damage threshold of >10 J/cm² for 10 ns pulses at 10 Hz with a 0.43 mm beam diameter. For continuous-wave operation, the specified certification level is 350 W/cm at 532 nm with a 1 mm beam diameter.

The beamsplitter interface uses an epoxy-free optical contact bond, which minimizes absorption and scattering that can occur with conventional adhesive bonding. This construction also provides good thermal stability and minimizes beam displacement through the cube.

The cube is manufactured from UV-fused silica and features a dielectric V-coating optimized for 532 nm. The four external optical surfaces have an AR coating with reflectance below 0.25% at 532 nm and 0° AOI, helping to reduce unwanted reflection losses.

Product Type: High-Power Polarizing Beamsplitter Cube
Part Number: PBS12-532-HP
Cube Size: 12.7 mm × 12.7 mm × 12.7 mm (1/2")
Design Wavelength: 532 nm
Substrate Material: UV-Fused Silica
Beamsplitter Type: Polarizing Beamsplitter
Polarization Function: Transmits P-polarized; Reflects S-polarized
Extinction Ratio Tp: >2,000:1
Transmission Efficiency Tp: >95%
Reflection Efficiency Rs: >99.5%
Clear Aperture: >11.43 mm × 11.43 mm
Transmitted Beam Deviation: <5 arcmin
Reflected Beam Deviation: 90° ±5 arcmin
Transmitted Wavefront Error: <λ/4 @ 633 nm
Surface Flatness: λ/10 at 633 nm
Surface Quality: 20-10 Scratch-Dig
AOI 0°
External AR Coating: R < 0.25% @ 532 nm, 0° AOI
Pulsed Laser Damage Threshold: >10 J/cm² @ 532 nm, 10 ns, 10 Hz, Ø0.43 mm
CW Laser Damage Threshold: 350 W/cm at 532 nm, Ø1 mm

The laser damage figures are Thorlabs' specified certification values for the coating used in the 532 nm high-power beamsplitter. Actual damage performance can depend on beam size, pulse duration, repetition rate, polarization, and other operating conditions.

The PBS12-532-HP is suitable for a wide range of high-power laser and polarization applications, including:

• 532 nm Laser Polarization Control
• Polarizing Beam Splitting
• High-Power Laser Beam Routing
• Laser Power Attenuation
• Laser Power Control
• Polarization Analysis
• Laser Beam Characterization
• Interferometry
• Nonlinear Optics
• Quantum Optics
• Microscopy
• Spectroscopy
• Laser Processing
• Scientific and Research Laser Systems
• High-Power Photonics Experiments
• Free-Space Optical Systems

The PBS12-532-HP is particularly well suited for systems where high optical power, high polarization extinction, and efficient separation of P- and S-polarized light are required. A typical setup can combine the beamsplitter with a half-wave plate to continuously control the amount of 532 nm laser power transmitted toward an experiment while directing the orthogonal polarization toward a beam trap.