Optical add / drop multiplexer using short-and chirped long-period fibre gratings for dense wavelength-division multiplexing

We propose and demonstrate the use of a novel wavelength-tuneable optical add/drop multiplexer (OADM) device based on fibre Bragg gratings (FBGs) and chirped long-period gratings (CLPGs) having a broad transmission spectrum. Numerical simulations predict bandwidths in the order of 40 nm and higher. Fabrication of the symmetric CLPGs, and the method of strain used for tuning of the fibre Bragg grating are also discussed.

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