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Talbot self-imaging and cross-phase modulation for generation of tunable high repetition rate pulse trains

✍ Scribed by Jeremy A. Bolger; Peifang Hu; Joe T. Mok; Justin L. Blows; Benjamin J. Eggleton

Publisher: Elsevier Science
Year: 2005
Tongue: English
Weight: 395 KB
Volume: 249
Category: Article
ISSN: 0030-4018
DOI: 10.1016/j.optcom.2005.01.052

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✦ Synopsis

We report generation of an ultra-high speed tunable pulse source with a repetition rate of 10, 30 or 40 GHz by a technique implementing a tunable chirped fibre Bragg grating. An optical pulse train of variable repetition rate is derived in a tunable dispersion compensator via the fractional temporal Talbot effect, acting on the output of a 10 GHz mode-locked laser. This ultra-high speed modulation is then used for phase modulation of a spectrally tunable probe by cross-phase modulation in highly nonlinear fibre, which is converted into constant-phase intensity modulation by spectral filtering.

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## Abstract An approach to generating repetition‐rate‐doubled return‐to‐zero pulse trains with a 33%‐duty‐cycle is proposed.A phase‐modulated light is divided into two parts having orthogonal polarization‐states, which are injected into a chirped‐fiber‐Bragg‐grating in inverse directions. A return‐