Real-time Fourier transformations performed simultaneously overmultiwavelength signals |
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Authors: | Azana J Muriel MA |
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Affiliation: | ETSI Telecomunicacion, Univ. Politecnica de Madrid ; |
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Abstract: | The real-time Fourier transformation (RTFT) has been previously proposed and demonstrated for a multitude of applications in the areas of optical communications, temporal signal processing, switching, filtering, time-division multiplexing, etc. Here, we present a technique for performing the RTFT simultaneously over all the channels of a multiwavelength (wavelength-division multiplexing) signal traveling in a single optical fiber. The technique only requires the reflection of the original signal in an appropriately designed structure of superimposed chirped fiber gratings. To demonstrate our proposal, we design a real-time optical spectrum analyzer operating on three different wavelength channels. The design is proved to function correctly by means of numerical simulations |
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