ERM-202 : Polarization Extinction Ratio Meter (ERM)

The LUNA 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).

Key Features

• PER measurement range >50 dB
• Angle resolution 0.06°
• Simultaneous PER and power ratio measurement (dual channel)

Specifications

• 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