Stefan Langenbach

Measurement of the dispersion tolerance of optical duobinary with an MLSE-receiver at 10.7 Gb/s

We experimentally demonstrate a significant improvement in the dispersion tolerance of optical duobinary modulation when employing an MLSE instead of a standard receiver. We show that the improvement critically depends on the MLSE design.

Cycle slip tolerant hybrid turbo differential decoding

We experimentally investigate the cycle slip tolerance of an enhanced Turbo Differential Decoding algorithm in nonlinear transmission. Error-free post-FEC measurements using a 100G QPSK DWDM module show excellent tolerance against cycle slips without a differential encoding penalty.

PMD Compensation using Electronic Equalization particular Maximum Likelihood Sequence Estimation

We review the basic electronic equalization techniques. We report new results of MLSE equalizers for combined chromatic dispersion and PMD. We show first results on the dynamic channel tracking performance of MLSE equalizers for PMD.

Review of Recent Progress in MLSE Receiver Technologies

MLSE offers adaptive non-linear receiver-sided equalization for channels with memory. New areas of application considered are directly modulated DFB laser, D(B/Q)PSK, and duo-binary transmission systems. Reduced computational complexity is a new research area.