Optical Carrier transmission rates

About: Optical Carrier transmission rates is a research topic. Over the lifetime, 2463 publications have been published within this topic receiving 33293 citations.

Optimized Parallel Transmission in Elastic Optical Networks to Support High-Speed Ethernet

Abstract: The need for optical parallelization is driven by the imminent optical capacity crunch, where the spectral efficiency required in the coming decades will be beyond the Shannon limit. To this end, the emerging high-speed Ethernet services at 100 Gbps have already standardized options to utilize parallel optics for data transmission, referred to as multi-lane distribution. OFDM-based optical network is a promising transmission option towards the goal of Ethernet parallelization. It can allocate optical spectrum resource tailored for a variety of bandwidth requirements in a fundamentally parallel fashion, with each sub-carrier utilizing a frequency slot at a lower rate than if serial transmission is used. In this paper, we propose a novel parallel transmission framework designed for elastic (OFDM-based) optical networks to support high-speed Ethernet services, in-line with IEEE and ITU-T standards. We formulate an optimization model based on integer linear programming, with consideration of various constraints, including spectrum fragmentation, differential delay and guard-band constraints. We also propose a heuristic algorithm which can be applied when the optimization model becomes intractable. The numerical results show the effectiveness and high suitability of elastic optical networks to support high-speed Ethernet parallel transmission, especially for connections with high bandwidth requirements. To the best of our knowledge, this is the first attempt to model parallel transmission in elastic optical networks in support of a standardized high-speed Ethernet system.

698.5-Gb/s PDM-2048QAM transmission over 3km multicore fiber

Abstract: We demonstrate the largest constellation optical transmission of 58.67Gb/s PDM-2048QAM using twelve single-mode cores of a 3km multicore fiber. As a result, 698.5-Gb/s transmission is achieved within an optical bandwidth of 3.4GHz.

Phase-coherent orthogonally polarized optical single sideband modulation with arbitrarily tunable optical carrier-to-sideband ratio

Abstract: We propose and experimentally verify a novel approach to achieve phase-coherence orthogonally polarized optical single sideband (OSSB) modulation with a tunable optically carrier-to-sideband ratio (OCSR). In our scheme, the orthogonally polarized OSSB signal is achieved using a dual-polarization quadrature phase shift keying (DP-QPSK) modulator without an optical band-pass filter (OBPF). Therefore, the proposed method is wavelength independent. The DP-QPSK modulator includes two parallel QPSK modulators locating on its two arms. The upper QPSK modulator of the DP-QPSK modulator is driven by two quadrature sinusoidal microwave signals and works at the frequency shifting condition whose bias voltages are optimized to suppress the optical. The lower QPSK modulator of that works at the maximum transmission point and the optical carrier is not modulated. The OCSR is continuously tunable by simply adjusting the bias voltages of the lower modulator. The frequency shifting optical signal from the upper QPSK modulator and the optical carrier from the lower QPSK modulator are combined together at the output of the DP-QPSK modulator. The optical carrier and sideband are polarized orthogonally. The generated OSSB signals could be used to shift and code the phase of the microwave signal and generate ultra-wideband (UWB) microwave pulse. The proposed method is analyzed and experimental demonstrated.

Field trial of end-to-end OC-768 transmission using 9 WDM channels over 1000 km of installed fiber

Abstract: We report the first end-to-end OC-768 transmission over 1000 km of installed fiber, using an all-Raman DWDM system with OC-768 intra-office client interfaces. Error-free transmission with more than 8 dB of OSNR margin was achieved.

Method of transmitting digital HDTV signals

Abstract: For transmitting digital HDTV signals, the HDTV signal, which is either fed with a data rate of ≦20.48 Mbit/s or which is data-reduced to such a data rate of ≦20.48 Mbit/s by means of a method utilizing the psycho-optical phenomena of the human eye, is split at the transmitter side of a broadband transmission link operating on the DSR method into two data streams of ≦10.24 Mbit/s each, and is fed to the I/Q interface of the 4PSK modulator of the DSR transmission link. These two data streams whch are transmitted to the I/Q output of the 4PSK demodulator of the DSR transmission link are then further processed thereat.