Open AccessPicosecond and sub-picosecond flat-top pulse generation using uniform long-period fiber gratings
Author(s) -
Y. Park,
Mykola Kulishov,
Radan Slavı́k,
José Azaña
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.012670
Subject(s) - optics , materials science , picosecond , ultrashort pulse , pulse shaping , optical fiber , fiber bragg grating , optoelectronics , laser , physics
We propose a novel linear filtering scheme based on ultrafast all-optical differentiation for re-shaping of ultrashort pulses generated from a mode-locked laser into flat-top pulses. The technique is demonstrated using simple all-fiber optical filters, more specifically uniform long period fiber gratings (LPGs) operated in transmission. The large bandwidth typical for these fiber filters allows scaling the technique to the sub-picosecond regime. In the experiments reported here, 600-fs and 1.8-ps Gaussian-like optical pulses (@ 1535 nm) have been re-shaped into 1-ps and 3.2-ps flat-top pulses, respectively, using a single 9-cm long uniform LPG.