Spectrometer on chip-based WDM photonic integrated components

Wavelength Division Multiplexing (WDM) has become the technology of choice for meeting the rapid increase in demand for bandwidth and capacity in telecommunication and computer networking systems. One of the key enabling technologies for WDM systems is multiwavelength filters. The spectrometer on a chip (SOC) is an integrated optics approach to the implementation of a high performance multiwavelength filter. This paper provides an overview of the design, processing, and testing issues for two types of SOCs: etched grating and phased-array waveguide grating. Both types of devices are used in various WDM components. In addition to wavelength multiplexers/demultiplexers, other integrated WDM photonic devices which utilize SOCs for their wavelength filtering functions will also be discussed.

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