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Characterization and optimization of optical pulse differentiation using spectral interferometry

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3 Author(s)
Yongwoo Park ; Inst. Nat. de la Recherche Scientitique, Montreal, Que., Canada ; Fangxin Li ; J. Azana

A simple fiber-based spectral interferometry setup is implemented for characterizing and monitoring the amplitude and phase of ultrafast temporal waveforms generated by optical differentiation with a long-period fiber grating (LPFG). In particular, the system is applied to characterize subpicosecond odd-symmetry Hermite-Gaussian (HG) pulses, consisting of two pi phase-shifted temporal lobes, obtained by temporal differentiation of Gaussian-like pulses. This technique is ideally suited for optimizing the experiment conditions (e.g., wavelength shifting between the input pulse and LPFG transmission characteristic) so as to achieve a nearly ideal odd-symmetry HG temporal waveform (with a sharp discrete pi phase shift at its center), of potential interest as a higher order soliton in dispersion-managed optical communication systems

Published in:

IEEE Photonics Technology Letters  (Volume:18 ,  Issue: 17 )