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We use the frequency-resolved optical gating (FROG) technique to determine the pulsewidth and chirp characteristics of wavelength-converted pulses from a turbo-switch and asymmetrical Mach-Zehnder filter combination under a variety of operating conditions. The output pulses were found to be near transform limited and had a high tolerance to line rate and input power variations.
By measuring cross-gain modulation in a turbo-switch, we demonstrate that appropriate control of the optical power in this high-speed all-optical switch results in greatly reduced dependence on the input data pattern. We further show that the non-linear patterning may even be reversed for high internal powers.
We describe the operating principle and performance of the 'turbo-switch', a new configuration of semiconductor optical amplifiers (SOAs) that gives an enhanced high-speed response for all-optical switching without compromising the optical signal-noise ratio. Error-free wavelength conversion is obtained at 170 Gb/s based on the use of an offset Mach-Zehnder interferometric filter incorporating a turbo-switch...
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