Author： Longhi Stefano
Publisher： IOP Publishing
E-ISSN： 2040-8986|17|4|45803-45809
ISSN： 2040-8986
Source： Journal of Optics, Vol.17, Iss.4, 2015-04, pp. : 45803-45809
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Abstract
The supersymmetric (SUSY) structure of coupled-mode equations that describe scattering of optical waves in one-dimensional Bragg gratings is highlighted. This property can find applications to the synthesis of special Bragg filters and distributed-feedback (DFB) optical cavities. In particular, multiple SUSY (Darboux–Crum) transformations can be used to synthesize DFB filters with any desired number of resonances at target frequencies. As an example, we describe the design of a DFB structure with a set of equally-spaced resonances, i.e. a frequency comb transmission filter.
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