Microbend grating is a convenient method to couple light from one guided
fiber mode into another. Due to its
antisymmetric nature of
perturbation
Perturbation or perturb may refer to:
* Perturbation theory, mathematical methods that give approximate solutions to problems that cannot be solved exactly
* Perturbation (geology), changes in the nature of alluvial deposits over time
* Perturbatio ...
, it can be used to couple only into antisymmetric modes. Microbend gratings are easily tunable for a wide range of
wavelength
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
It is the distance between consecutive corresponding points of the same phase on the wave, such as two adjacent crests, tro ...
s.
[J. N. Blake, B. Y. Kim, H. E. Engan, and H. J. Shaw, “Analysis of intermodal coupling in a two-mode fiber with periodic microbends”. Optics letters. 1987;12(4):281-3.]
References
Fiber optics
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