Abstract
We show analytically as well as experimentally a technique to generate a time-
and wavelength interleaved optical pulse-train (TWIPT) with tunable pulsewidth. The
technique involves dispersing an initial pulse-train using a standard single-mode-fiber
(SMF) followed by sectional dispersion compensation using a tunable μlti-channel
dispersion compensation module. Using an initial pulse-train with a fixed repetition
frequency frep and a tunable μlti-channel dispersion compensation module with a
fixed frequency spacing between the adjacent channels, our scheme shows that by choosing
appropriate value for the length of the SMF, we can generate a N × frep TWIPT
in the case when there are N channels within the bandwidth of the initial pulses. By
tuning the channel dispersion to be the opposite of the dispersion introduced by the
SMF, one is able to generate transform-limited pulsewidths for the TWIPT. Furthermore,
tuning the channel dispersion to other values permits pulsewidth tunability. Based on
the proposed scheme, using a 2 GHz supercontinuum source as an initial pulse-train, we
demonstrate the generation of a 10 × 2 GHz TWIPT with pulsewidth
tunability.
© 2013 IEEE
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