Spatiotemporal evolution of ultrashort time-domain dark hollow Gaussian pulses in free space
| Autor: | Xiaochao Cao, Qiang Lin, Zhaoying Wang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Coupling Pulse (signal processing) business.industry Gaussian 01 natural sciences Atomic and Molecular Physics and Optics 010309 optics Electric dipole moment symbols.namesake Optics Electric field 0103 physical sciences Chirp symbols Time domain 010306 general physics business Envelope (waves) |
| Zdroj: | Journal of Optics. 46:247-253 |
| ISSN: | 0974-6900 0972-8821 |
| DOI: | 10.1007/s12596-016-0348-z |
| Popis: | Based on the radiation field emitted by a pair of oscillating electric dipoles under the complex-source-point model, an analytical formula is proposed for describing a series of time-domain Gaussian pulses propagating in free space. According to the formula, we analyze the spatiotemporal propagation of the real part of the electric field, the square of electric field envelope and the energy density. The intrinsic chirps of the pulses are calculated. The ultrashort Gaussian pulse in time-domain will become flat Gaussian, and eventually turn into a time-domain dark hollow Gaussian (TDHG) pulse as the order term of the analytic expression increases. The TDHG pulses can keep dark hollow even for a long propagating distance. Furthermore, we discuss the energy density of the TDHG pulses in the off-axis situation and find out the characteristics of the spatiotemporal coupling. |
| Databáze: | OpenAIRE |
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