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16 March 2015 Spectral phase aberration and its influence on pulse compression in an actively modulated ultrafast laser system
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Abstract
In actively modulated laser systems such as the time-lens source, quadratic temporal phase modulation was naturally considered as the “ideal” modulation. However, it is unknown that whether a quadratic temporal phase modulation (equivalently, a linear chirp) translates into a quadratic spectral phase modulation, which can be easily eliminated using compressors. Here we study this phase transfer both analytically and numerically. Our results indicate that non-quadratic spectral phase aberration arises even if the temporal phase modulation is quadratic. Consequently, there is observable difference between the compressed pulses with a flat spectral phase and with quadratic spectral phase compensation only. However, as quadratic temporal phase modulation increases, non-quadratic spectral phase modulation decreases, and pulse compression with quadratic spectral phase tends to that with a flat spectral phase.
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Ke Wang, Kai Wang, and Ping Qiu "Spectral phase aberration and its influence on pulse compression in an actively modulated ultrafast laser system", Proc. SPIE 9357, Physics and Simulation of Optoelectronic Devices XXIII, 935705 (16 March 2015); https://doi.org/10.1117/12.2074993
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