Abstract
We demonstrate dynamic wavelength switching operation using a
super-structure grating (SSG)-DBR-LD and a semiconductor optical amplifier
(SOA)-delayed-interference signal-wavelength converter (DISC) for optical
packet switch and buffering systems. The wavelength conversion-type optical
switch has the advantage of lowering packet blocking probability and
reducing numbers of the required SOAs in the DISC-type wavelength converter.
However, we confirmed that large optical spikes occur at the timing of
wavelength switching due to the optical chirping. By detuning the center
wavelength of a bandpass filter to suppress optical chirped wavelength
component, we could reduce the intensity of the spikes. We also observed the
alternate wavelength switching operation with small optical spikes with
fixed detuning of the bandpass filter and the fixed optical phase bias of
the Mach–Zehnder Delayed Interferometer (MZDI) by setting the
small current variation of the SSG-DBR-LD for wavelength switching. Error
free performance was also achieved under back-to-back and 50 km single mode
fiber transmission.
© 2010 IEEE
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