Generation of a 4 × 100 GHz pulse-train from a single-wavelength 10-GHz mode-locked laser using superimposed fiber Bragg gratings and nonlinear conversion
Magne, J.
Bolger, J.
Rochette, M.
LaRochelle, S.
Chen, L.R.
Eggleton, B.J.
Azana, J.
Centre for Ultrahigh Bandwidth Devices for Opt. Syst., Univ. of Sydney, NSW, Australia;
This paper appears in: Lightwave Technology, Journal of
Publication Date: May 2006
Volume: 24,
Issue: 5
On page(s): 2091- 2099
ISSN: 0733-8724
INSPEC Accession Number: 8917016
Digital Object Identifier: 10.1109/JLT.2006.872682
Current Version Published: 2006-05-15
Abstract
In this paper, the design of a simple and practical repetition-rate multiplier based on superimposed-chirped fiber Bragg gratings (FBGs) is presented. A tenfold increase in the repetition rate of a mode-locked fiber source, by generating a 100-GHz optical pulse train from a 10-GHz train, is demonstrated experimentally. As compared with previous demonstrations, the superimposed FBG filter was specifically designed to decrease the duty cycle of the generated pulse train or, in other words, decrease the pulsewidth. In addition, a fiber nonlinear optical loop mirror (NOLM) is used to eliminate the pulse-to-pulse phase fluctuations in the output high-repetition-rate train and to achieve a wavelength-tunable transform-limited pulse sequence. Moreover, it is shown that nonlinear conversion using the NOLM can be used to simultaneously generate multiwavelength high-repetition-rate optical pulse trains (4 × 100 GHz in the example shown here).
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