Dense wavelength division multiplexer

Melloni, A., Costa, R., Monguzzi, P., and Martinelli, M., 2003, Ring-resonator filters in silicon oxynitride technology for dense wavelength-division multiplexing systems. Opt. Leu. 28(17) 1567-1569. 

RF devices, wide area networks, and Dense Wavelength Division Multiplexing systems... 

FIGURE 7 Add-drop filter for a dense wavelength division multiplexed optical communication system. Multiple streams of data carried at different frequencies F1, F2, etc. (yellow) enter the optical microchip from an external optical fiber and are carried through a waveguide channel (missing row of pores). Data streams at frequency F1 (red) and F2 (green) tunnel into localized defect modes and are routed to different destinations. The frequency of the drop filter is defined by the defect pore diameter, which is different from the pore diameter of the background photonic crystal. 

Many optoelectronic devices based on NLO properties of materials have been fabricated in the last years and their importance in integrated optics is growing more and more. For example they can be used in dense wavelength division multiplexers (WDM), laser cavities, spectrometers, reflectors and Alters in optical interconnects. 

For optical applications, inorganic silicate-based oxide [2], non-oxide sulfide [3], and hybrid [4] and nanocomposite thin films [5] have been extensively studied, for passive or active optical components in integrated optical applications, including power splitters, Er " -dof>ed optical amplifiers for dense wavelength division multiplexer (DWDM) systems, and Au nanoparticle (NP)-doped optical sensors. However, sol-gel-derived materials may often differ from their melt-quenched analogues, even for the simple compoimd Si02- In these... 

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