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Fiber and integrated optics
Mode composition of radiation in graded-index waveguides with random microbending of the axis
A. B. Valyaev, S. G. Krivoshlykov
Abstract:
It is shown that the problem of investigating the mode composition of a partly coherent radiation beam in a randomly inhomogeneous medium can be reduced to a study of evolution of the energy of individual modes and of the coefficients of correlations between the modes. General expressions are obtained for the coupling coefficients of modes in a parabolic waveguide with a random microbending of the axis and an analysis is made of their evolution as a function of the excitation conditions. An estimate is obtained of the distance in which a steady-state energy distribution between the modes is established. Explicit expressions are obtained for the correlation function in the case when a waveguide is excited by off-axial Gaussian beams or Gauss–Hermite modes.
Received: 24.09.1988
Citation:
A. B. Valyaev, S. G. Krivoshlykov, “Mode composition of radiation in graded-index waveguides with random microbending of the axis”, Kvantovaya Elektronika, 16:6 (1989), 1248–1256 [Sov J Quantum Electron, 19:6 (1989), 808–813]
Linking options:
https://www.mathnet.ru/eng/qe8179 https://www.mathnet.ru/eng/qe/v16/i6/p1248
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