The planning problem of novel DWDM-centric converged metro/aggregation networks is solved by algorithms based on intelligent wavelength assignment and an auxiliary-graph approach that exploits load-balanced routing and the optical-multiplexing capability of WSSes.

To enhance the video transmission security of a physical layer over wireless optical communication, an switch configured in front arrayed waveguide grating (AWG) router is proposed for implementing reconfigurable wavelength hopping configuration division multiplexing network protection against eavesdropping. In practical experiment AWG/optical-switch-based random scheme, simulated pseudorandom ...

Significant effort in optical-fibre research has been put in recent years into realizing mode-division multiplexing (MDM) in conjunction with wavelength-division multiplexing (WDM) to enable further scaling of the communication bandwidth per fibre. In contrast, almost all integrated photonics operate exclusively in the single-mode regime. MDM is rarely considered for integrated photonics becaus...

Light-trail is proposed as a candidate to carry IP traffic over wavelength division multiplexing (WDM) optical networks given its capability of accommodating multi-granularity traffic by time-division multiplexing (TDM). Light-trail’s unidirectional shared-media multicast nature makes it hard to implement distributed access control and restricts that at most one packet transmission can take pla...

We propose a spectral efficient radio over wavelength division multiplexed passive optical network (WDM-PON) system by combining optical polarization division multiplexing (PDM) and wireless multiple input multiple output (MIMO) spatial multiplexing techniques. In our experiment, a training-based zero forcing (ZF) channel estimation algorithm is designed to compensate the polarization rotation ...

The wavelength dependency of transparent current is investigated theoretically and empirically for bulk and quantum-well (QW) materials. A new analytical formula is presented for obtaining accurate Fermi levels of QW structures under current injection. The transparent current can be described with an exponential function of the wavelength using two fitting parameters. The simple expression can ...

We propose an approach for encoding and transmitting information based on the use of a quantum dot laser, which, depending injection current, emits either one two or simultaneously spectral components, with different wavelengths. When laser is modulated by each lasing line detected independent photodiode, thus encoded both intensity its wavelength. Keywords: lasers, two-state lasing, multilevel...

This paper proposes an architecture for routing Internet protocol (IP) packets directly on optical networks. The use of label switching is assumed in the IP routers, while a new routing architecture is introduced to transport IP packets across an optical backbone network. The architecture is based on a two-tier multiplexing approach, with wavelength division multiplexing (WDM) addressing the nu...

Erbium doped fiber amplifier (EDFA) has greatly helped in overcoming the propagation loses which are of biggest concern for next generation wavelength division multiplexing (WDM)/time division multiplexing (TDM) passive optical network (PON). This study is To characterize the performance of high-concentration EDFAs and the effect of the concentration quenching (homogeneous up-conversion and clu...