Open AccessFemtosecond pulse shaping using wavelength-selective directional couplers: proposal and simulation
Author(s) -
Shumin Sun,
Ming Li,
Jian Tang,
Ning Hua Zh,
Tae-Jung Ahn,
José Azaña
Publication year - 2016
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.24.007943
Subject(s) - optics , femtosecond , pulse shaping , femtosecond pulse shaping , pulse (music) , wavelength , waveform , gaussian , coupling (piping) , physics , power dividers and directional couplers , materials science , laser , quantum mechanics , voltage , detector , metallurgy
The femtosecond pulse-shaping capabilities of wavelength-selective directional couplers are investigated. Numerical results show that, depending on the coupling length and coupling coefficient, one can achieve very different temporal shapes at the output of the directional couplers. For instance, temporal re-shaping of Gaussian-like pulses into Hermite-Gaussian pulses, parabolic pulses, square temporal waveforms and sequences of equalized multiple pulses with time widths down to the femtosecond range can be achieved using readily feasible fiber/waveguide designs. The detrimental influence of the second-order variation of the detuning factor in these pulse shapers is also numerically investigated.