Analysis of a fiber-optic LP(01) ? LP(02) mode converter.
We investigate the intermodal coupling between LP(0l) and LP(02) modes for a mode converter fabricated in a few-mode fiber with photorefractive gratings. Our results show that a narrow spectrum of power conversion can be obtained by reducing the index perturbation or by using a large core-cladding index difference and a small fiber core radius.
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Okoshi