The FOS11 from Flyin Optronics is a Fiber Optic Switch with Insertion Loss 0.4 - 0.6 dB, Operating Temperature -20 to 70 Degree C, Optical Power =500 mW, Polarization Dependent Loss 0.05 dB, Storage Temperature -40 to 85 Degree C. More details for FOS11 can be seen below.