One of the most exciting applications of a laser lies in the field of communication. Due to the extremely high frequency of the laser light (~ 1015 Hz), the information-carrying capacity of such a beam is orders of magnitude greater than that of radio waves and microwaves. The concept of communication using light beams is old, but due to the absence of a powerful, coherent and monochromatic beam of light, it could not be put into practice. Unlike radio waves, one cannot transmit information using light beams through the atmosphere, due to attenuation and scattering caused by rain, dust, clouds, etc. Hence one requires a medium through which one can transmit information-carrying light beams without much distortion and attenuation. Fibers made of glass form such a medium and can be used as waveguides for optical beams.
KeywordsGaussian Beam Mode Conversion Entrance Aperture Scalar Wave Equation Incident Gaussian Beam
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