|
The NRT-40133A is a PMD Source designed for 40G/s bit-rate testing. For the first time you can determine:
- the performance degradation due to second-order PMD (SOPMD) as well as DGD,
- the interactions of noise,
non-linearities, channel spacing, chromatic dispersion, etc. with PMD,
- the PMD outage for any fiber PMD value in minutes/year,
for your transmitter, receiver, system and compensator/equalizer.
Download the PMDS Demonstration Software
This stable, repeatable, and versatile source removes the PMD statistics and dynamics from your experimentation allowing deterministic testing of the PMD impairment for DGD and SOPMD. NRT also offers a method to reintroduce the statistics after your PMDS measurements, in the data analysis stage. (For PMD tolerance testing methodology see our Technical Library section.)
The NRT-40133A can repeatably access more first and second-order PMD states than other PMD source designs providing greater flexibility and capabilities to meet your stringent test requirements.
 For example, in the figure at the right, the axes and the arching blue curve bound the accessible 2-D PMD states of the NRT-40133A, coherent 40G PMDS. A variable 2-stage PMD source would only be able to access the states below the yellow arch curve. It is obvious that the NRT-40133A can access significantly more important PMD states than other sources. This is especially true for states with relatively low DGD but significant SOPMD, where the relative impact of SOPMD is more probable and significant.
Both curves are overlaid on the joint probability density function for a 〈τ〉=8 ps fiber (shown contours). The NRT-40133A offers complete coverage, even for situations of very high mean DGD.
An example of the distortion provided by the NRT-40133A is shown below. The NRT-40133A can maintain this state indefinitely, and can be programmed to return to the exact same state over and over again.
|
