Laser Linewidth Limitations for Optical Systems with High-Order Modulation Employing Feed Forward Digital Carrier Phase Estimation

By Matthias Seimetz. OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference, 2008

249 citations recorded by the source corpus.

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

Laser Linewidth Tolerance for 16-QAM Coherent Optical Systems Using QPSK Partitioning (2010, unknown): “The improvement compared to the th power block scheme [3] is due to the fact that all symbols in a block contribute to an estimate of the phase error.”
Blind Equalization and Carrier Phase Recovery in a 16-QAM Optical Coherent System (2009, methodology): “In [9] an improved algorithm for CPE in 16-QAM has been reported by modifying the approach in [ 10 ].”
Hardware-Efficient Coherent Digital Receiver Concept With Feedforward Carrier Recovery for $M$ -QAM Constellations (2009, background): “The published algorithms either contain a decision directed feedback loop [9]–[11], use only dedicated symbols for carrier recovery that fulfill certain criteria [12] or perform differential decoding without carrier recovery [13].”
Spectrally Efficient Long-Haul Optical Networking Using 112-Gb/s Polarization-Multiplexed 16-QAM (2010, result): “The sensitivity to laser phase noise closely matches the results of [30] but shows better performance than reported in [ 32 ] and [33].”
Widely Tunable Narrow-Linewidth Monolithically Integrated External-Cavity Semiconductor Lasers (2015, background): “For example, a 16-QAM modulation format requires a laser linewidth <300 kHz [2].”