Journal ArticleDOI
Spectral index method applied to coupled rib waveguides
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TLDR
In this paper, the spectral index method was applied to closely coupled rib waveguides, and analytical expressions in terms of the propagation constant β were given for symmetric and antisymmetric polarised modes.Abstract:
The spectral index method is applied to closely coupled rib waveguides. Analytical expressions in terms of the propagation constant β are given for symmetric and antisymmetric polarised modes. The calculated coupling lengths are in excellent agreement with those obtained by mainframe programs.read more
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Planar waveguide analysis by the spectral index method: II. Multiple layers, optical gain and loss
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Planar waveguide analysis by the spectral index method. I: Rib and uniformly buried waveguides
TL;DR: In this article, the spectral index method for solving general planar waveguiding problems is analyzed. But the solution is so fast that the method can be used as a subroutine, making it possible to solve many two-dimensional problems fully, even for coupled rib waveguides, without using effective index approximations.
References
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400 Mbit/s, 372 km coherent transmission experiment using in-line optical amplifiers
TL;DR: In this paper, an optical transmission experiment using four in-line optical amplifiers was conducted to increase the longest non-regenerated transmission distance to 372 km with a net gain of 58,000 (47.7 dB) from the amplifiers.