This PDF file contains the front matter associated with SPIE Proceedings Volume 8283, including the Title Page, Copyright information, Table of Contents, and the Conference Committee listing.

We summarize several advanced modulation formats for high capacity transmission system with high spectral efficiency. We show that multilevel 8QAM, 16QAM, 32QAM and 64QAM optical signals can be generated by commercial optical and electrical devices. Employing these multilevel modulation formats, we have realized PDM-36QAM 64Tb/s signals transmission over 320km fiber. We also present some experimental results of 1Tb/s and 10Tb/s per channel signal transmission by advanced modulation formats.

Future Internet technologies will be affected not only by limited bandwidth of information infrastructure, but also by its energy consumption. In order to solve both problems simultaneously, in this invited paper, we describe several energy-efficient (EE) hybrid coded-modulation (CM) schemes enabling Terabit optical Ethernet: EE 4D CM, EE generalized- OFDM, and EE spatial-domain-based CM. A common property of these is employment of EE modulations, various degrees of freedom and rate-adaptive coding. These EE schemes are called hybrid as all available degrees of freedom are used for transmission over optical fibers including amplitude, phase, polarization and OAM. Since the channel capacity is a linear function in number of dimensions, by increasing the number of basis functions, we can dramatically improve overall capacity. The EE problem is solved by properly designing multi-dimensional signal constellations such that transinformation is maximized, while taking the energy constraint into account.

Self-phase modulation in a highly nonlinear fiber (HNLF) had been demonstrated to have regeneration capabilities when associated with shifted filtering. In this paper, we show how a saturated semiconductor optical amplifier (SOA) can enhance this concept by optimally transferring the signal power to the shifted-filter's side of the spectrum. We also provide a detailed optimization analysis of the filter's detuning and bandwidth by means of numerical simulations. In this study, we consider an amplitude and phase noise degraded return to zero differential binary phase shift keyed signal (RZ-DBPSK).

Metro and access networks are facing more and more challenges due to tremendous increase of bandwidth demand and great variety and flexibility of services. Traditional network architectures can only follow with big efforts in terms of both Capex and Opex. Therefore the metro and access part becomes the bottleneck of the whole transport network. With the introduction of PID (Photonic Integrated Device) technology the flexibility of modern OTN transport networks can be brought also to the metro and access area with sustainable Capex and dramatic reduction of Opex, while at the same time the flexibility of the network is increased significantly.

Network operators are moving towards next-generation Colorless, Directionless and Contentionless ROADMs (CDC-ROADMs) to increase the flexibility of their networks. Such so-called CDC-ROADMs require advances in optical component technologies, including high-port count Wavelength Selective Switches, Multicast Switches, Arrayed Amplifiers and Optical Channel Monitors. In this paper, we begin by examining the network-level requirements and see how these translate into component requirements and also identify opportunities to improve how these functional modules are integrated to optimize overall equipment design.

Photonic transport systems in the C+L bands have been extensively employed in conventional networks. The continuously expanding demand for greater photonic network capacities has created the need for the use of additional wavebands to strengthen the transmission capacities. We recently focused on the use of a novel wavelength band such as 1.0-μm (thousand band: T band), together with the conventional C and L bands, to enhance the usable optical frequency resources in future photonic networks employing waveband division multiplexing. Furthermore, we successfully demonstrated an ultra-broadband T-band photonic transport system using a holey fiber (HF) transmission line to create a wide range of usable optical frequency resources over 8.4 THz (wavelength range: 1037-1068 nm). In constructing an ultra-broadband photonic transport system for the T, C, and L bands, HF is considered to be a great candidate for an ultra-broadband and high-capacity data transmission line. In this study, we demonstrated a polarization division multiplexing (PDM) photonic transport system for doubling the optical frequency resources in the T band. Error-free PDM photonic transmissions in the T band with a clear eye opening at 10 Gb/s were successfully achieved over a long distance using an 11.4-km HF transmission line for the first time. To upgrade the present photonic network system, we believe the technologies of the demonstrated T-band PDM, together with WDM photonic transport systems using the >10-km long HF transmission line, represent a pioneering breakthrough in the use of ultra-broadband optical frequency resources.

High performance detectors are important components in optical communication networks. Broadband sensors with UV to Infrared detection capabilities are a promising solution as they offer simplicity at low development costs by eliminating the need for multiple detector designs. Significant improvements in the sensitivity of detectors have recently been made due to new material systems, fabrication techniques, and by utilizing novel architectures. However, the application of broadband detectors as common receivers for all optical communication bands (i.e. 650 nm, 980 nm, 1300 nm, 1550 nm) has not yet been achieved. We have developed a detector with a spectral response ranging from near UV to shortwave infrared (SWIR) for optical communication. This work investigates the optimization of our detector specifically for its use as a receiver in optical networks.

In a new optical transport network for 40/100 Gbps services different demands are coming up on test requirements for evaluating service parameters and the quality of the different services. Here examples are presented showing typical issues for service providers.

As demands on Provider Networks continue to grow at exponential rates, providers are forced to evaluate how to continue to grow the network while increasing service velocity, enhancing resiliency while decreasing the total cost of ownership (TCO). The bandwidth growth that networks are experiencing is in the form packet based multimedia services such as video, video conferencing, gaming, etc... mixed with Over the Top (OTT) content providers such as Netflix, and the customer's expectations that best effort is not enough you end up with a situation that forces the provider to analyze how to gain more out of the network with less cost. In this paper we will discuss changes in the network that are driving us to a tighter integration between packet and optical layers and how to improve on today's multi - layer inefficiencies to drive down network TCO and provide for a fully integrated and dynamic network that will decrease time to revenue.

We introduce a Wavelength Convertible Flexible Optical WDM (WC-FWDM) network architecture that offers wavelength conversion capability in addition to dynamic allocation of resources as in FWDM networks. We introduce the on-line routing, wavelength assignment and spectrum allocation problem in WC-FWDM networks for the first time, and propose an auxiliary-graph based polynomial-time heuristic-algorithm. Numerical results demonstrate that WC-FWDM networks can significantly reduce the blocking of connections and improve network throughput over FWDM networks with no wavelength conversion capability and fixed grid networks. Furthermore, sparse wavelength conversion can gain the same benefits as full wavelength conversion through wavelength converter sharing.

Control-plane scalability for Carrier Ethernet networks is a concern that directly impacts transport networks and has been addressed in this paper. Specifically, connectivity fault management optimization is proposed and validated through a analytical/simulations study.

Recent advances in high speed optical transmission from 100 Gb/s up to 1Tb/s per channel based on advanced modulation formats in progress in Brazil (CPqD) are exhibited. Optical transmission experimental results of 112G DP-QPSK WDM transmission, 224G DP-16QAM transmission with pre-filtering (achieving 8.96 b/s/Hz), and comb generation optimization for future Co-OFDM transmission are detailed. Digital signal processing set of algorithms built in-house for off-line processing are presented.

We introduce a method for differential mode delay (DMD) compensation by using a special silica GeO₂-doped graded-index multimode optical fiber, which provides a reverse reproducing of mode group velocity diagram of the target fiber, and algorithm for design it. Results of proposed method approbation for synthesis of DMD compensation fiber for OM2+/OM3 category target multimode fiber under both central and overfilled launch conditions are represented.

We represent results of numerical simulations for upgrade of optical link with SMF by using the DDMS technique based on application of compensating optical cable coiled around of optical closure. We propose this technique for minimization land cost. Nonlinearity management for decreasing of quasi-solitons interaction is considered. Based on NLSE the model of optical link regeneration section with dispersion and nonlinearity management is described. The NLSE was solved numerically. Estimated values for optical system performance were derived by taking into account the amplified spontaneous emission noise, parameters of dispersion map deviations, and the interaction of quasi-solitons.