Home Optical T&M Polarisation Measurement General Photonics ERM-202 – Extinction Ratio Meter

General Photonics ERM-202 – Extinction Ratio Meter

Product Code:
ERM-202
Manufacturer: General Photonics Corporation
  • One or Two Measurement Channels
  • Free Space Input
  • Front Panel or Remote Control
  • 50 dB PER range
  • Bright OLED display
  • Store and Recall Functions

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The General Photonics ERM-202 is a single or dual channel polarisation 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 optimise 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.

 APPLICATIONS

  • Verification of PM connectorisation and splices
  • Testing PM fibre coils
  • Simultaneous measurement of PER and power ratio
  • Testing Y-branch fibre gyro IOCs
  • Testing PM couplers (PMC), or polarisation beam splitters (PBS)
  • Evaluating the performance of depolarisers

Operating Wavelength Range1

1260 to 1620 nm

960 to 1160 nm

600-850 nm

Calibrated Wavelengths2

1550 and 1310 nm

980 and 1064 nm

630 and 830 nm

PER Dynamic Range

> 50 dB

> 40 dB

> 40 dB

PER Ranges3

0 to 50 dB for input power

-5 to 10 dBm

0 to 30 dB for input power

-25 to -5 dBm

0 to 40 dB for input

power 0 to 10 dBm

0 to 30 dB for input

power -20 to 0 dBm

0 to 40 dB for input

power 0 to 10 dBm

0 to 30 dB for input

power -20 to 0 dBm

Input Optical Power Range

-30 dBm to 10 dBm

-20 dBm to 10 dBm

-20 dBm to 10 dBm

PER Resolution

0.1 dB

PER Accuracy

±0.15 dB for ER < 30 dB

Angular Resolution

0.06°

Angular Accuracy

±1°

Power Measurement Accuracy

±0.5 dB

Power Resolution

0.02 dB (PER < 30 dB)

0.2 dB (PER > 30 dB)

Measurement Speeds

0.1, 0.2, 0.4, 1 seconds (Single channel version also has

10s measurement speed and manual polarizer control mode)

Connector Type2

Free space adapter for FC connector

Optical Power Damage Threshold

300 mW

Operating Temperature

0 °C to 40 °C

Storage Temperature

-20 °C to 60 °C

Display

OLED graphic display

Communication Interfaces

USB, RS-232, Ethernet, and GPIB

Analog Output4

0-5V (max range) monitor voltage scales with log of instantaneous power afterrotating polarizer.

Electrical Power Supply

100 – 240 VAC, 50 – 60 Hz

Dimensions

2U 19” half rack width 14” (L) x 8.5 “ (W) x 3.5” (H)

Notes:

1 Specifications given at 23±5 °C.
2 Other wavelength ranges and connector types may be available.
3 Other calibrated wavelengths available.
4 For measurement at or slower than 0.4 s/cycle

 

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