Abstract
In this paper, we propose an all-optical integrated-optic switch to be
used in wide wavelength range. Two architectures of the switch are
described. One architecture is formed with two cascaded interferometers
consisting of three asymmetric X-junction couplers, two Raman amplifiers,
and an attenuator. The other is formed with three cascaded interferometers
consisting of four asymmetric X-junction couplers and three Raman
amplifiers. In both architectures, multiple signals at different wavelengths
can be wavelength-selectively switched by pumping light in the
waveguide-type Raman amplifiers. The wavelength range is found to be as wide
as about 400 nm, which is ten times as wide as the range usable in the
previously reported switch. The switching operation in the wide wavelength
range is verified numerically. As a result, switching extinction ratio of
larger than 20 dB is obtained for wavelength range from 1350 to 1750
nm.
© 2009 IEEE
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