◆ Features
Strong laser tolerance:
Glue-free bonding avoids the risk of damage to traditional adhesives under strong laser;
Synthetic quartz material features excellent optical uniformity and thermal stability, making it suitable for high-intensity laser applications in the ultraviolet to near-infrared band (257 nm to 1064 nm)
High damage threshold: Optimized for different wavelengths, the laser damage threshold of some models can reach 7 J/cm² (10 ns pulse, 20 Hz repetition rate).
Efficient polarization separation：The transmittance of P light is greater than 97%.
Low loss：The light-transmitting surface is coated with multiple layers of dielectric anti-reflection film, resulting in minimal light loss.
High extinction ratio：Through the extinction ratio Ts:Tp=1:1000, High polarization purity.
Cube structure：When incident vertically, the exit optical axis has no translation, ensuring the stability of beam transmission.
◆ Common Specifications
Material | Synthetic fused silica |
Coating | Hypotenuse surface: Dielectric multi-layer coating Four surfaces: Multi-layer anti-reflection coating |
Incident Angle | 0° |
Surface Flatness of Substrate | λ/4 |
Beam Deviation | ＜10' |
Transmittance of P-polarized light | ＞97% |
Extinction Ratio of Transmission | Ts:Tp =1:1000 |
Surface Quality (Scratch-Dig) | 20/10 |
Clear Aperture | Circle that inscribed in a square of 85% of the dimensions |
◆ Applications
◇ Polarization control of the strong laser system：In high-power laser processing (cutting/welding), lidar and other systems, P/S polarized light is separated or synthesized to achieve energy distribution or optical path switching.
◇ Precision optical measurement：In devices such as interferometers and ellipsometers, it serves as a polarization beam splitting element to ensure the purity of the beam's polarization state and enhance measurement accuracy.
◇ Nonlinear optical conversion：When used in conjunction with frequency-doubling crystals, it can separate fundamental frequency light from harmonics or achieve polarization multiplexing in multi-wavelength laser systems.
◇ O-light wavelength matching：Select the corresponding model based on the actual laser wavelength used. Products applicable to the ultraviolet/deep ultraviolet band (257 nm - 343 nm) and visible/near-infrared band (355 nm - 1064 nm) are provided.
◇ Size requirements：Four cube side lengths are provided: 10 mm, 12.7 mm, 15 mm, and 20 mm, corresponding to effective diameters of 8.5 mm, 10.7 mm, 12.7 mm, and 17 mm respectively. It is necessary to ensure that the incident beam size does not exceed the effective diameter.
◇ Consideration of laser damage threshold：Estimate the energy density of the incident laser and ensure that the laser damage threshold of the selected mirror is higher than this energy density. For laser application scenarios with high pulse energy, mirrors with a higher laser damage threshold should be selected to prevent the mirrors from being damaged by the laser.
◇ Incident surface identification：It must be incident from the side marked with the "○ mark", otherwise the transmittance and extinction ratio will decrease.
◇ Energy density control：Avoid using high-energy-density light beams gathered by lenses/concave mirrors (which are prone to exceeding the damage threshold). It is necessary to calculate in advance the actual energy density acting on the surface of the component.
◇ Non-working wavelength：When used to design bands outside the wavelength, the polarization performance (transmittance, extinction ratio) will significantly deteriorate and needs to be verified in advance.
◇ Dispersion and aberration：The substrate thickness is relatively large. When converging/diverging beams are used, chromatic aberration and spherical aberration will be introduced. It is recommended for collimating beam scenarios.
Products
High Power Polarizing Beamsplitter
