Polarization Extinction Ratio Meter (ERM)
The ERM-202 is a rotating-polarizer polarization extinction ratio meter. It is available in single or dual channel versions.
The ERM-202 combines low noise circuitry with a high resolution stepper motor to achieve a PER dynamic range of 50 dB and angle resolution of 0.06°. It simultaneously measures PER, output power, and axis angle of the DUT. In addition, the dual channel version measures the power ratio of a device with two polarization maintaining (PM) outputs, such as a Y-branch fiber gyro IOC, PM coupler (PMC), or polarization beam splitter (PBS).
- PER measurement range >50 dB
- Angle resolution 0.06°
- Simultaneous PER and power ratio measurement (dual channel)
Wavelength range 1260-1620nm, 960-1160nm, or 600-850nm PER measurement range 0-50 dB (1260-1620nm)
0-40 dB (others)
PER resolution 0.1 dB PER accuracy ±0.15 dB (for PER <30 dB) Angular resolution 0.06° Angular accuracy ±1° Power accuracy ±0.5 dB
For full specifications, please download the ERM data sheet.