Abstract
A low-complexity and high-flexibility design for a wavelength-selective
optical switch using waveguide-type Raman amplifiers and directional couplers
is proposed. This switch can be used as a core device in large-scale WDM packet
routing networks. By relaxing some constraints in existing research, our design
provides the following characteristics: i) lower complexity, because fewer
units of Raman amplifiers and directional couplers are needed; ii) higher
flexibility of power gain, because a wide range of configurable power gain
for both unswitched and switched wavelengths is provided, so that equal power
gain or equal power level output for all WDM wavelengths may be obtained.
In addition to theoretical analysis, we provide a set of concise guidelines
to control the configurable power gain under practical consideration.
© 2008 IEEE
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