This paper presents lambdaMON a novel approach to passive monitoring of very high performance optical networks based on dense wavelength division multiplexing (DWDM). The approach offers very attractive cost/benefit scaling properties, which are further refined by introducing state-of-the-art transparent fiber switching equipment. The rapid pace at which we intend to implement lambdaMONs opens ...

Modern embedded systems already include dozens of cores on a single die and this number is expected to increase over the next decade. Corresponding increases in main memory bandwidth, however, are also required if the greater core count is to result in improved application performance. Projected future enhancements of existing electrical DRAM interfaces, such as XDR and FB-DIMM, are not expecte...

In the past few years, there are many approaches to increase in the bandwidth requirements of modern telecommunication networks. This has been mainly driven by the rise in the degree of popularity of the Internet and increased ever demand of multimedia applications A router or any switch can associate into a dense wavelength division multiplexing (DWDM) by transfer packets directly onto a wavel...

The final corrections which might be made in the last two antireflection (AR) layers in the deposition of narrow bandpass filter designs such as might be used for Dense Wavelength Division Multiplexing (DWDM) in the fiber optics communications field were discussed in a previous report. A broader range of techniques and simulations of those final layer adjustments are described here, how they ca...

We propose a novel 8-channel wavelength multimode interference (MMI) demultiplexer in slot waveguide structures that operate at 1530 nm, 1535 nm, 1540 nm, 1545 nm, 1550 nm, 1555 nm, 1560 nm, and 1565 nm. Gallium nitride (GaN) surrounded by silicon (Si) was found to be a suitable material for the slot-waveguide structures. The proposed device was designed by seven 1 × 2 MMI couplers, fourteen S-...

We demonstrate a compact photon pair source based on a periodically poled lithium niobate nonlinear crystal in a short cavity. This approach provides efficient, low-loss, mode selection that is compatible with standard telecommunication networks. Photons with a coherence time of 8.6 ns (116 MHz) are produced and their purity is demonstrated. A source brightness of 134 pairs (s. mW. MHz)(-1) is ...

We study the effects of laser phase noise on a phase diversity coherent optical frequency domain (C-OFD) technique that has been recently proposed to measure passive devices used in dense wavelength division multiplexing (DWDM) systems. Theoretical expressions are provided to calculate the laser phase-noise to intensity-noise conversion in this technique under simplified circumstances. Obtained...

With the explosive growth in the Internet traffic in recent years, capacity expansion of dense wavelength-division multiplexing (DWDM) systems is advancing, creating a need for implementation of flexible networks that can reconfigure themselves depending on traffic situations, and for cost reduction. For this reason, conventional distribution feedback (DFB) lasers with fixed wavelengths are rap...

To meet increased fiber capacity and transmission distance demands, ultra-Dense Wavelength-Division Multiplexing (DWDM) is preferred by Sprint because of its compatibility with Sprint's legacy fiber plant, composed primarily of standard Single-Mode Fiber (SMF). This paper focuses on long-haul transmission efficiencies and fiber compatibility. The trade-offs between bandwidth efficiency, transmi...

In this paper, a 16 channel 25 Gbps DWDM optical network is simulated and analyzed for 120 km using dispersion compensating fiber. The system is operated on -10dBm of Input Power. NRZ-DPSK modulation format is used for transmission under symmetrical compensation schemes. Group velocity and third order dispersion are compensated to improve the Q-factor. Impact of Third Order Dispersion as well a...