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- Publications
- Influence
Compensation of Dispersion and Nonlinear Impairments Using Digital Backpropagation
Optical fiber transmission is impacted by linear and nonlinear impairments. We study the use of digital backpropagation (BP) in conjunction with coherent detection to jointly mitigate dispersion and… Expand
Feedforward Carrier Recovery for Coherent Optical Communications
We study a carrier-synchronization scheme for coherent optical communications that uses a feedforward architecture that can be implemented in digital hardware without a phase-locked loop. We derive… Expand
Digital Equalization of Chromatic Dispersion and Polarization Mode Dispersion
In this paper, we consider a fractionally spaced equalizer (FSE) for electronic compensation of chromatic dispersion (CD) and polarization-mode dispersion (PMD) in a dually polarized… Expand
Spectral efficiency limits and modulation/detection techniques for DWDM systems
- J.M. Kahn, Keang-Po Ho
- Physics
- IEEE Journal of Selected Topics in Quantum…
- 7 June 2004
Information-theoretic limits to spectral efficiency in dense wavelength-division-multiplexed (DWDM) transmission systems are reviewed, considering various modulation techniques (unconstrained,… Expand
Principal Modes in Graded-Index Multimode Fiber in Presence of Spatial- and Polarization-Mode Coupling
- M.B. Shemirani, W. Mao, R.A. Panicker, J.M. Kahn
- Physics
- Journal of Lightwave Technology
- 15 May 2009
Power-coupling models are inherently unable to describe certain mode coupling effects in multimode fiber (MMF) when using coherent sources at high bit rates, such as polarization dependence of the… Expand
Signal Design and Detection in Presence of Nonlinear Phase Noise
In optical fiber transmission systems using inline amplifiers, the interaction of a signal and amplifier noise through the Kerr effect leads to nonlinear phase noise that can impair the detection of… Expand
Fiber Impairment Compensation Using Coherent Detection and Digital Signal Processing
Next-generation optical fiber systems will employ coherent detection to improve power and spectral efficiency, and to facilitate flexible impairment compensation using digital signal processors… Expand
Impact of chromatic and polarization-mode dispersions on DPSK systems using interferometric demodulation and direct detection
We study the impact of chromatic dispersion (CD) and first-order polarization-mode dispersion (PMD) on systems using binary differential phase-shift keying (2-DPSK) or quaternary DPSK (4-DPSK) with… Expand
Electronic compensation technique to mitigate nonlinear phase noise
- Keang-Po Ho, J.M. Kahn
- Physics
- Journal of Lightwave Technology
- 22 November 2002
Nonlinear phase noise, often called the Gordon-Mollenauer effect, can be compensated electronically by subtracting from the received phase a correction proportional to the received intensity. The… Expand
Performance of electrical equalizers in optically amplified OOK and DPSK systems
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