Open AccessUltra-wideband pulse generation with flexible pulse shape and polarity control using a Sagnac-interferometer-based intensity modulator
Author(s) -
Jianqiang Li,
Kun Xu,
Songnian Fu,
Jian Wu,
Jintong Lin,
Ming Tang,
Perry Ping Shum
Publication year - 2007
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.15.018156
Subject(s) - optics , interferometry , physics , pulse (music) , wideband , phase modulation , modulation (music) , femtosecond pulse shaping , pulse shaping , pulse width modulation , ultrashort pulse , voltage , acoustics , laser , phase noise , quantum mechanics , detector
We propose a novel scheme to generate ultra-wideband (UWB) pulse by employing a Sagnac interferometer comprising a phase modulator. This structure performs a dual-input and dual-output intensity modulator (IM), ultimately resulting in the flexibility to select the shape and the polarity of the generated UWB pulse. The experiment results show a good agreement with the theoretical investigation in terms of both pulse profile and spectrum, which conforms to the definition of UWB signals by the U.S. Federal Communications Commission. Furthermore, the proposed scheme is independent of the voltage bias point.