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Phase Retarder

Reflective Phase Retarder

Reflective Phase Retarders are used as beam bending mirrors external to the laser cavity to establish and maintain circular polarization. This requirement is particularly vital for laser material processing applications where cut or scribed edge quality, or weld penetration, is critical to the consistency and precision of the final part. Ninety degree Phase Retarders, also commonly called circular polarizers, are used external to the laser cavity to transform the laser's linearly polarized beam into a circularly polarized beam. Zero degree Phase Retarders maintain control over the circularly polarized beam.

Part No. Material Diameter (mm) Thickness (inch/mm) Side 1 Radius Side 1 Reflectivity (%R) Degree (°)
0RCU-50-10 Copper 50.0 9.99 Plano >99.8% 0
0RSI-3.0-6.4 Silicon 76.2 6.40 Plano >99.5% 0
0RSI-2.0-5 Silicon 50.8 5.10 Plano >99.5% 0
0RSI-1.5-4 Silicon 38.1 4.10 Plano >99.6% 0
0RCU-60-6 Copper 60.0 6.00 Plano >99.5% 0
0RCU-57-10 Copper 57.0 9.99 Plano >99.8% 0
0RCU-50-5 Copper 50.0 5.10 Plano >99.8% 0
0RCU-50-25-WC Copper 50.0 9.99 Plano >99.8% 0
90RSI-2.0-5 Silicon 50.8 5.10 Plano >98.0% 90
90RSI-1.5-4 Silicon 38.1 4.10 Plano >98.0% 90
90RCU-57-10 Copper 57.0 9.99 Plano >98.0% 90
90RCU-50-25-WC Copper 50.0 9.99 Plano >98.0% 90
90RCU-50-10 Copper 50.0 9.99 Plano >98.0% 90
90RCU-2.0-9.5 Copper 50.8 9.50 Plano >98.0% 90
90RCU-1.5-6.4 Copper 38.1 6.40 Plano >98.0% 90
90RSI-2.0-9.5 Silicon 50.8 9.50 Plano >98.0% 90

Transmissive Phase Retarder

It’s necessary to alter or manipulate the source’s polarization. For example, a reflective phase retarder converts linear to circular polarization and improves the laser cutting quality. However, most polarization altering devices: the reflective phase retarder and waveplates are very wavelength sensitive and offer only narrowband, or single wavelength operation.