Author
A. Gladisch
Bio: A. Gladisch is an academic researcher from Deutsche Telekom. The author has contributed to research in topics: Dispersion (optics) & Amplifier. The author has an hindex of 2, co-authored 2 publications receiving 174 citations.
Topics: Dispersion (optics), Amplifier, Modulation
Papers
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TL;DR: A novel method based on the evaluation of amplitude histograms generated by asynchronous sampling is found to detect signal degradations due to noise, crosstalk or pulse distortion with a high sensitivity.
Abstract: A novel method for performance monitoring of transparent optical systems, based on the evaluation of amplitude histograms generated by asynchronous sampling, is investigated experimentally. The method was found to detect signal degradations due to noise, crosstalk or pulse distortion with a high sensitivity.
127 citations
TL;DR: In this paper, the transmission behavior of return-to-zero (RZ) and non-return-tozero (NRZ) modulated signals was compared numerically and experimentally.
Abstract: We compared numerically and experimentally the transmission behavior of return-to-zero (RZ) and nonreturn-to-zero (NRZ) modulated signals, 10 Gb/s were transmitted over 2040-km standard single-mode fiber using an alternating dispersion compensation scheme in a recirculating loop with 102 km amplifier spacing. Receiver sensitivities of -33 dBm (NRZ) and -35 dBm (RZ) could be achieved. RZ allows for a simple linear dispersion compensation whereas NRZ suffers from nonlinear signal distortion. NRZ requires under-compensation of the linear chromatic dispersion dependent on signal power and transmission length. Therefore, NRZ makes network design more difficult.
47 citations
Cited by
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19 Feb 2004
TL;DR: In this paper, the role of OPM as an enabling technology for advances in high-speed and optically switched networks is examined, with the focus on fault management and QoS monitoring in the optical domain.
Abstract: Progress in optical networking has stimulated interest in optical performance monitoring (OPM), particularly regarding signal quality measures such as optical signal-to-noise ratio (SNR), Q-factor, and dispersion. These advanced monitoring methods have the potential to extend fault management and quality-of-service (QoS) monitoring into the optical domain. This paper reviews OPM applications and techniques, while examining the role of OPM as an enabling technology for advances in high-speed and optically switched networks.
480 citations
TL;DR: The development of various OPM techniques for direct-detection systems and digital coherent systems are reviewed and future OPM challenges in flexible and elastic optical networks are discussed.
Abstract: Optical performance monitoring (OPM) is the estimation and acquisition of different physical parameters of transmitted signals and various components of an optical network. OPM functionalities are indispensable in ensuring robust network operation and plays a key role in enabling flexibility and improve overall network efficiency. We review the development of various OPM techniques for direct-detection systems and digital coherent systems and discuss future OPM challenges in flexible and elastic optical networks.
242 citations
TL;DR: In this article, the authors describe specific fiber impairments that future intelligent optical network might want to monitor as well as some promising techniques, which could potentially enable higher stability, reconfigurability, and flexibility in a self-managed optical network.
177 citations
TL;DR: The practicability of using phase modulation in a 16 channel 10 Gbit/s system over 1600 km of standard SMF with simple dispersion compensation and the robustness in presence of ASK modulated channels has been shown for the first time.
Abstract: The practicability of using phase modulation in a 16 channel 10 Gbit/s system over 1600 km of standard SMF with simple dispersion compensation and the robustness in presence of ASK modulated channels has been shown for the first time.
156 citations
TL;DR: How predictions were made from the outset of research in laser based optical communications and how they have evolved to their present form, accurately predicting the performance of coherently detected communication systems are described.
Abstract: In this paper, we review the historical evolution of predictions of the performance of optical communication systems. We will describe how such predictions were made from the outset of research in laser based optical communications and how they have evolved to their present form, accurately predicting the performance of coherently detected communication systems.
149 citations