Optical data networking: protocols, technologies, and architectures for next generation optical transport networks and optical internetworks

We analyze and propose a directional optical coupler embedded in photonic crystal (PhC) for the C, L, and U bands of ITU (International Telecommunications Union), which is driven by an external command signal. Therefore, this switching cell can work in an all-optical switch. The switching method uses a low power external command signal, inserted in the central coupling region, which acts as another waveguide. The switching process is based on the change of the straight state to the cross state owing to the external command signal.

show abstract

“…A full-optical WDM switch architecture uses a space switch matrix (Danielsen et al 1997;Yao et al 2000;Rodriguez-Meral et al 2000). …”

Section: Coupled Mode Methodsmentioning

confidence: 99%

Switching cell embedded in photonic crystal

Lima

Sombra

2009

Microsyst Technol

View full text Add to dashboard Cite

show abstract

“…The signalling protocol will actually reserve and activate a wavelength channel on each link and thus set up the whole end-to-end lightpath [10]. After the convergence of the routing information, each routing entity will update its knowledge about the number of available wavelengths in each link.…”

Section: Control Information Dissemination and Managementmentioning

confidence: 99%

Recovery from control plane failures in GMPLS‐controlled optical networks

Montuno

Mouftah

et al. 2002

Int J Communication

View full text Add to dashboard Cite

SUMMARYThe health status of the control plane and the data plane of a GMPLS-controlled optical network is independent in the physically separated control network implementation. In most control plane designs, besides the topology information, the entities of the routing protocol only record the number of available wavelengths on each link. However, the status of each wavelength is maintained by the entities of the signalling protocol. Without recovery ability of the signalling protocol CR-LDP, a failure in the control plane will result in the permanent loss of the status information of wavelengths. A mechanism to recover the status information of the wavelengths is proposed. A downstream node maintains a label information database (LID) about assignable (free) labels in each incoming link. A copy of LID is redundantly stored in the upstream node as a label information mirror (LIM). A systematic procedure is proposed to synchronize the contents of a LIM and the corresponding LID. The initialization of a new LDP session with the enhanced recovery mechanism will guarantee the revival of the status information of wavelengths. It can recover multiple control channel failures, but it only applies to single node failure among any pair of adjacent nodes. # Crown

show abstract

“…During the packet transmission, either physical or logical, a data path is then provided by the PRU between the related input and output ports. Most of the current optical packet switches are in fact hybrid optical packet switches, i.e., while the packet remains in the optical domain, a copy of the packet header is converted into electrical signals for processing in the HPU [1,2]. The decision of the HPU is then used to set the PRU to route the packet.…”

Section: Introductionmentioning

confidence: 99%

All-optical packet switching with all-optical header processing using Fabry-Perot laser diodes

Wai

Lui

et al. 2005

SPIE Proceedings

View full text Add to dashboard Cite

We will describe recent results in all-optical packet switching with all-optical header processing using Fabry-Perot laser diodes (FP-LD). First, we will report an all-optical header processor and control signal generator using a single FP-LD with a special two-intensity-level control signal and a novel self-routing address format for the data packets. We then show that the special control signal can be generated by direct modulation of a DFB laser with square electrical pulses thus simplifying implementation. We will demonstrate that a single Fabry-Perot laser diode can also serve as an alloptical on/off switch with all-optical header processing. The header rate is 5 Gb/s and the payload rate is 10 Gb/s. The all-optical on/off switch can also be realized by using a FP-LD as the header processor only and executing the packet switching at a separate stage. The two-stage implementation of all-optical on/off switch eliminates the residue header bits problems if only a single FP-LD is used. Finally, we propose an all-optical packet-switched ring network which can be constructed from the all-optical on/off switches demonstrated.

show abstract

Optical data networking: protocols, technologies, and architectures for next generation optical transport networks and optical internetworks

Cited by 35 publications

References 21 publications

Switching cell embedded in photonic crystal

Switching cell embedded in photonic crystal

Recovery from control plane failures in GMPLS‐controlled optical networks

All-optical packet switching with all-optical header processing using Fabry-Perot laser diodes

Contact Info

Product

Resources

About