Transmission of Light Intensity Modulation Signals in Analog Fiber-Optic Links

Extended Single-Sideband Light Intensity Modulation Formats

“…is the complex amplitude of the harmonic with frequency . In calculating (9), we use the Graf theorem on the summation of Bessel functions, which for the purpose of our analysis, we rewrite in form (see Appendix) (10) where complex number z 3 exp(iγ) is the sum of two other complex numbers and . As a result, we get expression (11) A similar, but more cumbersome version of expression (11) with division into even and odd spectral components was also obtained in [10].…”

“…Thus, the optical signal detector is quadratic with respect to the electric field strength of the light wave. Determination of the spectral components of light intensity (9) based on knowledge of the spectral composition of corresponding electromagnetic wave (6) leads to the calculation of series of type (10). Such calculations are usually performed using the Graf summation theorem for Bessel functions.…”

“…This statement is the essence of Graf's theorem. Equivalent statement (10) used in this article to calculate the intensity of the light signal is obtained from (A.8) by replacing index m by -m .…”

Generation of Optical Signals Resistant to Dispersion-Induced Power Degradation

“…Simplified version of (37) which is suitable to the balanced Mach-Zehnder modulator was obtained earlier in [46]. (38) When cosθ goes to zero, the signal at the fiber output disappears [47,48].…”