Home Optical T&M Polarisation Measurement General Photonics PXA-1000 – Distributed Polarisation Crosstalk Analyser

General Photonics PXA-1000 – Distributed Polarisation Crosstalk Analyser

Product Code:
PXA-1000
Manufacturer: General Photonics Corporation
  • High spatial resolution: 6 cm
  • -75 dB polarisation X-talk sensitivity
  • 30 dB PER measurement range
  • Large fibre measurement range: 2.6 km

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The General Photonics PXA-1000 Distributed Polarisation Crosstalk (X-Talk) Analyser is an enhanced white light interferometer that measures space-resolved stress by analysing stress-induced polarisation cross-coupling along a length of polarisation maintaining (PM) fibre. The patented design eliminates strong zero-order interference and reduces the multi-coupling interference common in traditional white light interferometers, both of which can cause “ghost” peaks in the measured signal. The removal of the “ghost” peaks enables the PXA-1000 to unambiguously identify the magnitudes and locations of actual x-talk peaks, resulting in higher measurement sensitivity, higher dynamic range, and higher spatial measurement accuracy.

It locates imperfections or areas of local stress inside PM fiber coils including any stress from the winding process. The instrument can also completely characterise PM fibre (refer to the Application Note).

The PXA-1000 comes with a notebook computer and PolaXView™ software.

 APPLICATIONS

  • Qualification of PM fibre coils
  • Measuring the extremely high PER of a polarising waveguide
  • Obtaining the auto correlation function of a light source
  • Measuring the birefringence or length of a PM fibre

 

Operation Wavelengths1

1310 or 1550 nm

Polarization X-talk Measurement Sensitivity

-75 dB (for DUT output power >5dBm)

-80 dB typical

Polarization X-talk Measurement Noise Floor2

-95 dB

Polarization X-talk Resolution

0.25 dB

Polarization X-talk Repeatability3

±0.5 dB

Polarization X-talk Accuracy4

±0.5 dB

Measurement or Sensing Range

(Assuming PM Fiber Δn of 5 ×10-4)

1.3 km or 2.6 km standard

3.1 km available

Measurement Speed5

8 s/100m (with fiber Δn = 5 × 10-4 )

Spatial Resolution6

6 cm (assuming no fiber dispersion, birefringence Δn=5×10-4)

PER Measurement Range

> 30 dB

Spatial Accuracy7

±20 cm (with fiber Δn = 5×10-4 )

Waveguide Polarization Dependent Attenuation

up to 75dB ( for DUT output power > 5dBm )

LiNbO3 Waveguide Spatial Resolution

0.75 mm

SLD Power

> 7 dBm

SLD Bandwidth

> 30 nm

SLD PER

> 20 dB

Software

PolaXView™ data analysis/display software

Operating Temperature

10 to 50 °C

Storage Temperature

-20 to 60 °C

Power Supply

100 – 240 VAC, 50 – 60 Hz

Communications Interface

USB 2.0

Display

Notebook computer with USB connection

Connector Type

PM narrow key FC/PC standard

Dimensions

2U, ¾ 19” rack width

14" (L) x 14" (W) x 3.5" (H)

Notes:
1 Shorter wavelengths around 850 nm and 1060 nm available upon request.
2 Defined as the system noise displayed on the polarisation X-talk curve when input light is turned off during a measurementfor which the DUT output power >5 dBm (See Fig. 1).
3 Defined as the standard deviation of twenty successive measurements of the amplitude of an X-talk peak between -15 and-40 dB.
4 At 23 ± 5 °C. Guaranteed by design and calibration in manufacturing process.
5 Average speed for full-length scan.
6 Defined as the minimum resolvable distance between two polarisation X-talk points of equal amplitude, based on Sparrow Criterion (two peaks of equal height overlap at 3dB point, resulting in a flat-top curve) and measured when the peaks are between -15 and -40 dB.
7 Defined as the standard deviation of twenty successive measurements of the distance of an X-talk peak of height between -15 and -40 dB from the X-talk peak induced by the input connector (zero position).

 

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