Abstract

A theoretical study of a new application of a simple π-phase-shifted waveguide Bragg grating (PSWBG) in reflection mode as a high-speed optical dark-soliton detector is presented. The PSWBG consists of two concatenated identical uniform waveguide Bragg gratings with a π phase shift between them. The reflective PSWBG, with grating reflectivities equal to 0.9, a free spectral range of 1.91THz, and a nonlinear phase response, can convert a 40Gbits noisy dark-soliton signal into a high-quality 40Gbits return-to-zero signal with a peak power level of 17.5dB greater than that by the existing Mach–Zehnder interferometer with free spectral range of 1.91THz and a linear phase response.

© 2007 Optical Society of America

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