| 21. |
- Sköld, Mats, 1977, et al.
(författare)
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Constellation diagram measurements of induced phase noise in a regenerating parametric amplifier
- 2008
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Ingår i: OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference; San Diego, CA; United States; 24 February 2008 through 28 February 2008. - 9781557528551 ; , s. OML4-
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Konferensbidrag (refereegranskat)abstract
- We perform coherent constellation diagram measurements of phase modulated data before and after a saturated parametric amplifier, and find a novel kind of pump-induced phase noise in the amplifier.
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| 22. |
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| 23. |
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| 24. |
- Sunnerud, Henrik, 1971, et al.
(författare)
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Analytical theory for PMD-compensation
- 2000
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Ingår i: IEEE Photonics Technology Letters. - : Institute of Electrical and Electronics Engineers (IEEE). - 1041-1135 .- 1941-0174. ; 12:1, s. 50-52
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Tidskriftsartikel (refereegranskat)abstract
- Exact analytical expressions are derived for the expected pulse broadening in a fiber-optic transmission system suffering from both first- and higher-order polarization mode dispersion (PMD). In particular, two different optical compensation techniques are studied: one based on launching the light in a principal states of polarization; and the other adding a birefringent element after the system to compensate the PMD to first order at one specific wavelength. The influence of each technique is quantified through simulation.
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| 25. |
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| 26. |
- Sunnerud, Henrik, 1971, et al.
(författare)
-
Optimum receiver decision point in presence of PMD in fiber-optic communication systems
- 2003
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Ingår i: IEEE Photonics Technology Letters. - 1041-1135 .- 1941-0174. ; 15:11, s. 1651-1653
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Tidskriftsartikel (refereegranskat)abstract
- We show that in polarization-mode dispersion-limited fiber-optic transmission systems, an optimal fixed receiver decision point (threshold and timing) can give the same low outage probability as with an adaptively variable decision point. A comparison is made between different types of receivers.
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| 27. |
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| 28. |
- Sunnerud, Henrik, 1971, et al.
(författare)
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Polarization-mode dispersion measurements along installed optical fibers using gated backscattered light and a polarimeter
- 2000
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Ingår i: Journal of Lightwave Technology. - : Institute of Electrical and Electronics Engineers (IEEE). - 0733-8724 .- 1558-2213. ; 18:7, s. 897-904
-
Tidskriftsartikel (refereegranskat)abstract
- We describe two new techniques that utilize a polarimeter for studying the state of polarization of gated Rayleigh-backscattered or Fresnel-backreflected light along optical fibers in real time on the Poincare sphere. The first method, using Rayleigh-backscattered light, is here applied to measure the accumulation of polarization-mode dispersion (PMD) along an 11.5 km section of installed fiber link. With a simplified configuration, the second technique is developed and applied for measuring the PMD of individual fiber subsections in a 37 km long link. This is achieved by using the Fresnel-reflections which arise from the fiber connectors that join the link.
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| 29. |
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| 30. |
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