| Autor: |
Ruziev, Z. J., Sapaev, B., Sapaev, I. B., Sapaev, U. K., Amanov, R., Nazaraliev, D. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 6/16/2022, Vol. 2471 Issue 1, p1-6, 6p |
| Abstrakt: |
Frequency doubling of ultrashort laser pulses in nonlinear photonic (periodic) crystals is investigated by numerical methods by using the approximation of the slowly varying amplitudes and a unidirectional approximation, applicable to simplify the wave equation with nonlinear polarization in a dispersive medium. Under the same experimental conditions, results of these approximations are compared. Comparative analysis shows that, up to 10 fs of the main pulse duration, both approximate methods describe this frequency conversion in almost the same way, but below 10 fs, there is a discrepancy between their results. Mainly, the formation of the temporal profile of the second harmonic pulse and its efficiency are compared. A technique for obtaining time profiles of the second harmonic pulse, when one uses a unidirectional approximation is also shown. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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