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FIBER-COUPLED POLARIMETER

(SOP, DOP, PER measurements)

Stand-alone benchtop fiber-coupled polarimeter

 

APEX Technologies’ stand-alone benchtop fiber-coupled polarimeter enables real-time monitoring of the SOP, DOP, Extinction ratio measurements of polarizers, and the power of a light signal in fiber.

It can display SOP data information either on a Poincaré sphere, a Jones diagram or on a virtual oscilloscope. Covering the operating wavelength range from 1260 to 1610nm, it offers excellent performance, fast sampling rate, high SOP accuracy, and wide dynamic input optical power range. Optionally, it can be used in combination with an internal Optical Filter to measure the SOP as a function of frequency. Intuitive software and touch screen allows an easy manipulation of the device.

polarimeter-45deg

Specifications

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SOP accuracy

Sample/s

  • O & C+L bands
  • input power range : -60 to +10 dBm
  • PER measurement

Principle

The incident optical signal is converted into four electrical currents I, via four internal photo-detectors. Each signal corresponding to a different phase (polarization) is analyzed separately. These four outputs will offer the possibility to calculate the four Stokes parameters, thus the Stokes column S.

SOP and DOP measurements

After performing a calibration using a linear polarizer
at 0 and 45° for the horizontal calibration or at 90° and
45° for the vertical calibration, we display the state of
linear polarization input signal by variating the linear
polarizer angle between 0 and 360°. Our polarimeter
allows also to measure the DOP with an accuracy of
+/- 0.5%.

Polarization extinction ratio measurement

APEX Technologies polarimeter can be used to measure the polarization extinction ratio of PM fibers. By applying mechanical stress (stretch, heat) on the fiber, the measured points forms a circle on the Poincaré sphere. The PER is then calculated from the radius of the circle. Our equipment allows to measure PER values of up to 45 dB.

PM fiber alignment

The APEX Technologies polarimeter can be used to align the polarization axis of PM fibers and for. Fiber splicing in real time.

This experiment is performed by rotating and stretching one of the two fibers. The perfect alignment is achieved at maximum output power and maximum PER.

Features

  • Standard FC/APC connector
  • Wavelength range: 1520nm to 1610nm
  • Input power range: -60 dBm to +10 dBm
  • SOP accuracy: ±0.25° (-30 to + 2 dbm)
                               <2° (-35 to + 5 dBm)
  • Measurable SOP states: Full Poincaré sphere

Applications

  • Four Stockes parameters measurement
  • Instantaneous state of polarization (SOP)
  • Degree of polarization of input light (DOP)
  • Three different displaying modes: Jones graph, Poincaré sphere and Stockes parameters oscilloscope
  • Extinction ratio measurement of polarizers or alignement of PM fiber
  • Very low PER measurement  

Data Handlings

  • USB connectors (3 USB-A in front panel and one USB-B in rear panel for USB remote control
  • Ethernet
  • GPIB connector
  • RS-232 connector
  • Sensitive screen (5.0 inch)

A user-friendly interface

Benchtop-front-panel

Many possibilities of remote control technologies

Tools and documentation

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