AI Article Synopsis
- Space-time (ST) wave packets, which exhibit dynamic optical properties, can be created by synthesizing multiple frequency comb lines with complex spatial modes that adapt orbital angular momentum (OAM) values.
- The study explores how changing the number of frequency comb lines and the spatial mode combinations affects the tunability of these ST wave packets, achieving OAM values from +1 to +6 in a short time frame.
- Simulation results indicate that using more frequency lines can lead to narrower pulse widths for the ST wave packets, and variations in OAM values can create distinct frequency chirps at different times.
Article Abstract
Space-time (ST) wave packets have gained much interest due to their dynamic optical properties. Such wave packets can be generated by synthesizing frequency comb lines, each having multiple complex-weighted spatial modes, to carry dynamically changing orbital angular momentum (OAM) values. Here, we investigate the tunability of such ST wave packets by varying the number of frequency comb lines and the combinations of spatial modes on each frequency. We experimentally generate and measure the wave packets with tunable OAM values from +1 to +6 or from +1 to +4 during a ∼5.2-ps period. We also investigate, in simulation, the temporal pulse width of the ST wave packet and the nonlinear variation of the OAM values. The simulation results show that: (i) a pulse width can be narrower for the ST wave packet carrying dynamically changing OAM values using more frequency lines; and (ii) the nonlinearly varying OAM value can result in different frequency chirps along the azimuthal direction at different time instants.
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| http://dx.doi.org/10.1364/OL.472363 | DOI Listing |
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