Applications to Optical Communication
- 205 Downloads
A propagating light wave can be used to transfer information from a “transmitter” plane to a “receiver” plane. This can be accomplished by utilizing variations of its intensity, phase, frequency, or polarization. These variations could be functions of time or space or both. The best example is that of light emitted from or scattered by the surface of an object. As the light propagates, it carries information about the object to the viewer in the form of a spatial intensity distribution — an image. Along with the image, the viewer always receives unwanted light coming from other sources — the background. Because of the uncertain nature of the photodetection process, the viewer ends with a noisy replica of the image and the background. Techniques of statistical estimation and detection theory can be used very effectively to reduce the background and combat the uncertainties.
KeywordsOptical Signal Local Oscillator Radar Signal Coherence Time Optical Communication System
Unable to display preview. Download preview PDF.