Murat Serbay

Investigation of Multilevel Phase and Amplitude Modulation Formats in Combination With Polarization Multiplexing up to 240 Gb/s

We present experimental investigations of the receiver sensitivity and dispersion tolerance of multilevel optical communication systems with a symbol rate of 40 Gbaud. Four- and eight-level communication is obtained by combining binary amplitude modulation with either binary or quadrature differential phase modulation. We experimentally compare the dispersion tolerance, and show that multilevel modulation formats offer much better dispersion tolerance compared to binary formats. By combining multilevel modulation with polarization multiplexing, bit rates up to 240 Gb/s were obtained. We demonstrate transmission over 50-km fiber span with no power penalty for a pseudorandom binary sequence length of 27-1 bits

Advanced Modulation Formats for Transmission Systems

DQPSK has shown that multilevel modulation formats can enable new possibilities in optical communication systems. The paper presents several options to go to even more advanced formats using direct detection.

10,200 km 22/spl times/2/spl times/10 Gbit/s RZ-DQPSK dense WDM transmission without inline dispersion compensation through optical phase conjugation

Using optical phase conjugation with a polarization independent periodically-poled lithium-niobate subsystem, we demonstrate dense WDM 2/spl times/10 Gbit/s RZ-DQPSK transmission over 10,200 km of SSMF with a record accumulated dispersion exceeding 80,000 ps/nm.

42.8 Gbit/s, 4 Bits per Symbol 16-ary Inverse-RZ-QASK-DQPSK Transmission Experiment without Polmux

We present an experimental implementation of 16-ary 42.8 Gbit/s Inverse-RZ-QASK- DQPSK, using four-level inverse return-to-zero amplitude modulation with four-level differential phase modulation. We demonstrate transmission over a 75 km fibre span with only minor degradation. copy2006 Optical Society of America

Receiver Sensitivity of Advanced Modulation Formats for 40 Gb/s DWDM Transmission with and without FEC

Receiver sensitivity of a wide range of current modulation formats including multi-level formats and coherent detection is studied by extensive Monte-Carlo simulations and by experiment. Required OSNR for BER of 10-9 with and without FEC is determined.

Orthogonal Frequency Division Multiplexing (OFDM) and other Advanced Options to achieve 100Gb/s Ethernet Transmission

Based on the demand for transmission technologies offering high ratio of bits per symbol, two promising candidates to achieve a data rate of 100 Gb/s per optical carrier are discussed, namely optical orthogonal frequency division multiplexing and 16-ary multilevel modulation.

Experimental Investigation of Asymmetrical Filtered 43 Gb/s RZ-DQPSK

We experimentally investigate the impact of centre frequency drift of either laser source or optical bandpass filters for 43 Gb/s RZ-DQPSK. We show by Monte-Carlo simulations that frequency drifts of 40 GHz result in only 3.6 dB OSNR penalty

Dispersion Tolerance of 40 Gbaud Multilevel Modulation Formats with up to 3 bits per Symbol

We present numerical and experimental investigations of dispersion tolerance for multilevel phase- and amplitude modulation with up to 3 bits per symbol at a symbol rate of 40 Gbaud

Performance of Electronic Dispersion Compensation for Multi-Level Modulation Formats using Homodyne Coherent Detection

We investigate numerically the performance of electronic dispersion compensation with linear transversal filters of different filter lengths and tap delays for RZ-DQPSK, RZ-8-DPSK and star RZ-16-DQAM after homodyne coherent detection at 10.7 Gsymbols/s.

32.1 Gbit/s InverseRZ-ASK-DQPSK Modulation with Low Implementation Penalty

32.1 Gbit/s InverseRZ-ASK-DQPSK is experimentally investigated using a new InverseRZ generation method. We demonstrate <1 dB upgrade penalty from 21.4 Gbit/s RZ-DQPSK, and <2 dB transmission penalty after one 75 km fibre span