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This paper presents a method of analysing beam waveguide systems, based on Physical Optics and Complex Conical Beams. The analysis procedure for one reflector consists of calculating the field spectrum in the auxiliary input/output plane, expanding the field (spectrum) into complex conical beams, propagating the beams to the subsequent reflector and calculating the reflected fields in the next auxiliary...
We develop a method of characterizing semiconductor-laser phase noise using a digital coherent receiver. The field spectrum, FM-noise spectrum, and phase-error variance can completely describe phase-noise characteristics.
It is shown that one can control the spectrum of electromagnetic wave propagating through dielectric medium by applied external electric field. The control of field spectrum may be used for designing of the controllable filters in the terahertz and optical band for uninterrupted and pulse signals.
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