Extinction Ratio Meter

The ERM-202 is a single or dual channel polarization extinction ratio (PER) meter. When used with a broadband source, it directly measures PER. Single and dual channel models are available. The single channel instrument can be upgraded to a dual-channel version at a later date. By combining low noise circuitry with a high resolution stepper, the ERM series achieves a PER dynamic range of 50 dB.
These instruments are the first to market with OLED displays, a high contrast bright readout that allows the data to be observed from several feet away. The instruments can be operated from the front panel or via remote control. The operator can choose from 4 measurement speeds to optimize speed or accuracy and can observe multiple parameters on the front panel screen including PER, axis angle, power ratios, and optical power.
The measurement data can be stored and recalled for comparison purposes from the front panel as well. Full digital or remote control is included for unattended or system applications.

Verification of PM connectorization and splices
Testing PM fiber coils
Simultaneous measurement of PER and power ratio
Testing Y-branch fiber gyro IOCs
Testing PM couplers (PMC), or polarization beam splitters (PBS)
Evaluating the performance of depolarizers

Key Features
• One or Two Measurement Channels
• Free Space Input
• Front Panel or Remote Control
• 50 dB PER range
• Bright OLED display
• Store and Recall Functions 

ERM 202

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