An optical fiber sensor network for ultrasonic measurement based on wavelength division multiplexing (WDM) and time division multiplexing (TDM) technology is presented. Each of the sensor probes is an optical fiber extrinsic Fabry-Perot interferometer (EFPI) which is composed of the fiber’s end face and the aluminum thin diaphragm. The sensors are arranged in different wavelength domains formed...

In this paper, we study the effect of the round trip propagation delay on performance measures of WDM networks and adopt a dynamic policy and a synchronous transmission procedure to access data channels. Also we propose a new control architecture for WDM star-coupled networks, to overcome the electronic processing bottleneck that the single control channel architecture introduces. Key-Words: Wa...

In this article, we first discuss QoS metrics of the data networks, followed by raising the challenging problems for the nextgeneration Internet with high-performance and high-quality. We then discuss how the WDM technology can be incorporated for resolving those problems. Several research issues for the IP over WDM networks are also identified. key words: Internet, IP (Internet Protocol), TCP ...

This contribution gives a short introduction in optical WDM (Wavelength Division Multiplexing) networks with special focus on wide-area transport networks and on a possible evolution scenario towards all-optical networks. Furthermore, design and planning aspects for a WDM network are discussed. This comprises a short overview on a planning process in general and a presentation of some specific ...

We propose a super-channel flexible wavelength division multiplexing (WDM) receiver architecture. The receiver, which requires no optical filtering, only a pair (I and Q phases) of coherent optical detectors, and an electrical receiver system, can simultaneously recover multiple wavelength-multiplexed channels using cascaded optical and electrical down-conversion. The receiver data capacity inc...

Wavelength converters using quasi-phase matched LiNbO3 (QPM-LN) waveguides are recognized as key devices for future wavelength division multiplexing (WDM) systems. These converters provide unique characteristics such as the simultaneous conversion of WDM channels, a large signal bandwidth, and transparency as regards modulation format. In this review, we describe waveguide fabrication using the...

Herein, an attention-grabbing and up-to-date review related to major multiplexing techniques is presented which includes wavelength division (WDM), polarization (PDM), space (SDM), mode (MDM) orbital angular momentum (OAMM). Multiplexing a mechanism by multiple signals are combined into shared channel used showcase the maximum capacity of optical links. However, it critical develop hybrid metho...

Wavelength division multiplexing (WDM) has been considered a promising transmission technology in optical communication networks. With the continuous advance in optical technology, WDM network will play an important role in wide area backbone networks. Optical wavelength switching, compared with optical packet switching, is a more mature and more cost-effective choice for optical switching tech...

In recent years, with the rapid exhaustion of the capacity in wide area networks led by Internet and multimedia applications, demand for high bandwidth has been growing at a very fast pace. Wavelength-division multiplexing (WDM) is a promising technique for utilizing the huge available bandwidth in optical fibers. In this paper, we consider efficient designs of nonblocking WDM permutation switc...

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...