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■ Eliminates polarization fading 

■ Maintains signal-to-noise ratio
■ Compact package
■ PCB mountable
■ 1550 or 1310 nm

The OPTIPHASE (R) PDR is a highly efficient and cost effective Polarization Diversity

Receiver for use in interferometric measurement and sensing systems. The PDR

eliminates polarization fading in fiber optic interferometers without significant

degradation in the signal-to-noise ratio.

The PDR serves as a receiver to fiber optic interferometers that allow for

polarization fading through random birefringence fluctuations. The three

independent polarized receivers assure that at least one of the outputs have high

interferometric visibility.

Input light is split by a 1 x 3 fiber optic coupler made with SMF-28 with low

polarization dependent loss. The three outputs are pigtailed to polarized PIN

photodiodes (InGaAs). The polarizer orientation of the photodiodes is 0, +60 and -60 degrees.

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