General Photonics ERM-202 Polarization Extinction Ratio Meter
ERM-202 full-band extinction ratio tester is a single-channel and dual-channel optional extinction ratio tester, which can achieve full-band measurement from 1260 to 1650nm. It can be used to measure the extinction ratio and power ratio of dual output polarization-preserving devices, such as: Y-branch fiber optic gyro IOC, polarization-preserving coupler (PMC), polarization beam splitter (PBS), and also to evaluate the output polarization of the polarizer.