Photonics by Georg A. Reider

Author:Georg A. Reider
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

Waveguide gratings can be combined to produce a variety of devices such as Fabry–Perot resonators; a particularly interesting example is the immediate serial combination of two identical gratings with a phase slip, i.e., with an axial shift of one of the gratings in respect to the other; here, we consider a shift of (Fig. 5.30) and assume that the two gratings extend over the ranges and [0, l∕2], respectively. For the first grating, Eqs. (5.101)–(5.103) yield

Fig. 5.30Axial variation of the susceptibility in a waveguide grating with -phase defect

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