ERM-202 Polarization Extinction Ratio Meter (ERM)
Rotating-polarizer polarization extinction ratio meter with a PER dynamic range of 50 dB, available in single or dual channel versions.
- Operating wavelength range
- 1260 to 1620 nm
- Operating wavelength range
- 960 to 1160 nm
- Operating wavelength range
- 600-850 nm
- Calibrated wavelengths
- 1550 and 1310 nm
Overview
The Luna ERM-202 is a rotating-polarizer polarization extinction ratio (PER) meter. It is available in single channel and dual channel versions. The single-channel version can later be upgraded to dual-channel.
The instrument combines low noise circuitry with a high resolution stepper motor to achieve a PER dynamic range of 50 dB and an angle resolution of 0.06°. It measures PER, output power and axis angle of the device under test simultaneously.
The dual channel version also 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). It can also evaluate the output degree of polarization of depolarizers. An analog electrical PER output is provided for each channel.
PER, axis angle, power ratios and optical power are measured automatically and shown on an OLED graphic display. The instrument has four measurement speeds from 0.1 to 1 second per cycle: the fast speeds are used for live alignment and the slow speeds for accuracy. Measurement data can be stored and recalled for comparison.
Key Features
- PER measurement range >50 dB
- Angle resolution 0.06°
- Simultaneous PER and power ratio measurement (dual channel)
- Two measurement channels
- Bright OLED display
- Store and recall functions
- Analog electrical PER output for each channel
- Single-channel version upgradable to dual-channel
Specifications
|
Operating wavelength range
13/15
|
1260 to 1620 nm
Other wavelength ranges may be available
|
|---|---|
|
Operating wavelength range
98/10
|
960 to 1160 nm
Other wavelength ranges may be available
|
|
Operating wavelength range
63/83
|
600-850 nm
Other wavelength ranges may be available
|
|
Calibrated wavelengths
13/15
|
1550 and 1310 nm
Other calibrated wavelengths available
|
|
Calibrated wavelengths
98/10
|
980 and 1064 nm
Other calibrated wavelengths available
|
|
Calibrated wavelengths
63/83
|
630 and 830 nm
Other calibrated wavelengths available
|
|
PER dynamic range
13/15
|
> 50 dB |
|
PER dynamic range
98/10, 63/83
|
> 40 dB |
|
PER ranges
13/15
|
0 to 50 dB for input power -5 to 10 dBm; 0 to 30 dB for input power -25 to -5 dBm |
|
PER ranges
98/10, 63/83
|
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
13/15
|
-30 dBm to 10 dBm |
|
Input optical power range
98/10, 63/83
|
-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 type |
Free space adapter for FC connector
Other connector types may be available
|
| Optical power damage threshold | 300 mW |
| Display | OLED graphic display |
|---|---|
| Communication interfaces | USB, RS-232, Ethernet, and GPIB |
| Analog output |
0-5V (max range)
Monitor voltage scales with log of instantaneous power after rotating polarizer
|
| Operating temperature | 0 °C to 40 °C |
|---|---|
| Storage temperature | -20 °C to 60 °C |
| 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) |
Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.
Applications
- PM fiber pigtailing of modulators, waveguides and laser diodes
- PMC and PBS manufacturing
- PM fiber connectorization
- Depolarizer characterization
- PM fiber fusion splicing
- PM fiber coil production
- Quality assurance for fiber gyros
- IOC PER and coupling ratio tests
- PMC and PBS PER and coupling ratio tests
- PM fiber patch cord production
- Manufacturing test of fiber optic assemblies
- Photonic control for OEMs - fiber optic gyroscopes
Options & Accessories
| Option | Description |
|---|---|
| 1 | Single channel — Channel option |
| 2 | Dual channel — Channel option |
| 13/15 | 1260 - 1620nm — Wavelength option |
| 98/10 | 960 - 1160nm — Wavelength option |
| 63/83 | 600 - 850nm — Wavelength option |
| FC | FC free space adapter — Connector type option |
| PEZ | Bare Fiber Adapter |
| RCK-001 | Rack Mount Kit |
Documents & Resources
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