Grating enhanced all-optical switching in a Mach-Zehnder interferometer

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作者：
Laser-Lab. Göttingen E.v., 37077 Göttingen, Germany [1 ]
不详 [2 ]
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来源：
Opt Commun | / 1卷 / 35-40期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Diffraction gratings - Functions - Integrated optoelectronics - Interferometers - Mathematical models - Nonlinear distortion - Nonlinear optics - Optical Kerr effect - Optical switches - Parameter estimation;
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摘要：
We consider a Mach-Zehnder interferometer with a nonlinear Bragg grating in one arm, and numerically simulate the time dependent behaviour of the all-optical switch. Compared with the same device without a grating the switching threshold is reduced by a factor of 4, while low pulse distortion is maintained for a pulse width of 8.8 ps. Bloch function theory leads to a simple model that allows one to estimate the enhancement factor for an arbritrary grating structure.
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