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SUMMARY:Cross phase modulation induced depolarization of a probe signal an
 d its impact on polarization mode dispersion compensators
DTSTART;VALUE=DATE-TIME:20110714T150000Z
DTEND;VALUE=DATE-TIME:20110714T170000Z
DTSTAMP;VALUE=DATE-TIME:20260711T201538Z
UID:indico-contribution-5158@events.saip.org.za
DESCRIPTION:Speakers: Timothy Gibbon (Nelson Mandela Metropolitan Universi
 ty)\nNonlinear effects are easily observed in single mode optical fibres b
 ecause of the fibre small spot size and extreme low loss. At high optical 
 intensities in fibres the refractive index becomes a function of the inten
 sity of the optical signal. This refractive index is known as the Kerr non
 linearity. This leads to the optical Kerr effect where the nonlinear phase
  shift induced by an intense high power pump changes the characteristics o
 f the probe beam. Cross phase modulation (XPM) refers to a nonlinear effec
 t where a pump beam with high intensity changes the phase of a low power p
 robe beam.\nIn this work\, we consider the composite problem of polarizati
 on mode dispersion (PMD) and XPM in wavelength division multiplexing (WDM)
  networks. PMD continues to pose a treat to high speed optical networks he
 nce the need for PMD compensators (PMDCs). PMDCs monitor the link PMD in a
 n indirect manner where a popular monitoring technique tracks the degree o
 f polarization (DOP) of a signal in the link. It can be shown that in a tw
 o channel WDM system an intensity modulated pump modulates the state of po
 larization (SOP) of a probe signal at the pump bit rate. In this work we e
 xperimentally demonstrate the depolarization of a probe signal in the pres
 ence of an intensity modulated pump signal. The results show that minimum 
 interaction between the pump and probe signal occur when the pump and prob
 e input Stokes vectors are parallel and anti-parallel. Hence the probe sig
 nal incurs maximum depolarization when the two signals are arranged in an 
 orthogonal configuration. These results are crucial to PMDC because the so
 urce of the DOP degradation may mislead the compensator.\n\nhttps://events
 .saip.org.za/event/7/contributions/5158/
LOCATION: Asteria
URL:https://events.saip.org.za/event/7/contributions/5158/
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