However, each project can be investigated independent of the other. For instance if ten wavelengths are used then one single optical fiber can transmit ten communications channels simultaneously hence boosting the capacity ten-fold. In order for the network be remain versatile, components that can select specific wavelengths are required for the signal demultiplexing. Additionally, these components should be electronically tunable so that switching can be performed. An rf signal is sent through a crystal which creates a dispersive grating.
Optical signals diffract off of that grating if certain matching conditions are met.
By changing the frequency of the rf signal, one can effectively tune in the required wavelength. In this project, we will be measuring the characteristics of the AOTF to assess its suitability for demultiplexing WDM signals. Jim Moharam Beam Profile Distortion in Volume Holography Experimental investigation of the distortion in beam profile upon diffraction by thick volume hologram will be performed. Volume holographic gratings will be recorded in photorefractive lithium niobate crystals. Spatial profiles of the diffracted beam profile will be characterized under various recording configurations.