This is the in-line version of the PolaRITE polarization controller. It can be inserted into a fiber optic system to control the polarization state of light without having to disconnect any part of the system.
Simultaneously detecting the powers of two orthogonal polarization components is important for many sensor and measurement systems, to either obtain polarization related information or minimize polarization sensitivity.
This patented device comes in a package as small as 85 × 60 × 10 mm for lasers with coherence lengths less than 10 meters. Devices for coherence lengths in the kilometer range can be custom made in a larger package, with nominal customization fees.