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Compensating and equivalence properties of optical waveguides with a linear and sinusoidal variation of the core refractive index and core size along the propagation direction
Author(s) -
Pandey P. C.,
Ojha S. P.
Publication year - 2001
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/1098-2760(20010305)28:5<326::aid-mop1031>3.0.co;2-b
Subject(s) - refractive index , core (optical fiber) , variation (astronomy) , optics , radius , equivalence (formal languages) , physics , normalized frequency (unit) , microwave , mathematics , computer science , quantum mechanics , computer security , phase locked loop , discrete mathematics , frequency synthesizer , astrophysics , phase noise
We study two types of variation along the propagation ( z ‐axis) of a step‐index fiber. In one case, the core refractive index n 1 varies linearly and sinusoidally with the z ‐coordinate, and in the other, the core radius a varies with z . By a study of the modal characteristics under the weak guidance condition, we show the requisite variation of a with z which will compensate (annul) the variation of n 1 with z . This establishes an equivalence of the size variation and core refractive index variation along the z ‐axis. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 28: 326–328, 2001.