Tobias Ellermeyer

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We demonstrate single-laser 32.5 Tbit/s 16QAM Nyquist wavelength division multiplexing transmission over a total length of 227 km of SMF-28 without optical dispersion compensation. A number of 325 optical carriers is derived from a single laser and encoded with dual-polarization 16QAM data using sinc-shaped Nyquist pulses. As we use no guard bands, the(More)
This paper presents a single-chip eye opening monitor IC for decision-guided optimization of the frequency response of an optical receiver. The IC provides an analog output voltage proportional to the horizontal eye opening of a data signal. The chip includes a delay-locked loop for automatic adjustment of the clock phase. It was designed in a 50-GHz-f/sub(More)
The use of high bit rates for TDM transmissions on long haul fiber links is not only limited by the speed of electronic components but also by problems like fiber dispersion, polarization mode dispersion and fiber nonlinearities, especially if an installed standard fiber is used. An approach to alleviate these problems is the use of electronic(More)
On-chip transmission line modelling and design become increasingly important as frequencies are continuously going up. This paper explores possibilities to implement transmission lines on CMOS ICs via coupled coplanar strips. EM-field simulations with SONNET are used to estimate important transmission line properties like characteristic impedance,(More)
On-chip transmission line modelling and design become increasingly important as frequencies are continuously going up. This paper explores possibilities to implement transmission lines on CMOS ICs via coupled coplanar strips. EM-field simulations with SONNET are used to estimate important transmission line properties like characteristic impedance,(More)