LUNA’s high-speed self-latching polarization switch (PSW) switches between 2 output states of polarization (SOPs).
Figure 1 : PSW-003, High-Speed Polarization Switch
It can be configured as a polarization rotator, with output states 45° or 90° apart, or as a linear-circular converter. The device can be used for polarization sensitive OCT, polarization sensitive OTDR or OFDR, PMD monitoring, polarization modulation, polarization detection, and polarization metrology.
Figure 2 : Polarization ellipse for a generalized elliptical SOP α is the azimuth angle and β is the ellipticity angle of the polarization ellipse.
Figure 3 : Polarization Rotator Switch - Linear SOP rotation example: A linear input SOP at an arbitrary angle α0 experiences a positive (counterclockwise) or negative (clockwise) rotation of θ/2 due to the action of the switch.
The azimuth angle difference between the two output SOPs is the nominal switch angle θ, where θ = 45° or 90°, depending on the switch.
KEY FEATURES :
• Digitally switched SOP Typical Switching Time 45μs•
• SOP repeatability 0.1°
• Self-latching
• Zero static power dissipation
• Compact
• Minimal heat generation
APPLICATIONS :
• Polarization diversified detectors and sensors
• Polarization sensitive OCT
• Polarization metrology
• Polarization sensitive
• OTDR or OFDR
• PMD monitoring
• Fiber optic sensing