If EM fields do not operate on each other, why do we need many modes and large gain bandwidth to generate short pulses?

Chandrasekhar Roychoudhuri; Negussie Tirfessa; Colin Kelley; Richard Crudo

doi:10.1117/12.717251

22 March 2007 If EM fields do not operate on each other, why do we need many modes and large gain bandwidth to generate short pulses?

Chandrasekhar Roychoudhuri, Negussie Tirfessa, Colin Kelley, Richard Crudo

Author Affiliations +

Proceedings Volume 6468, Physics and Simulation of Optoelectronic Devices XV; 64681N (2007) https://doi.org/10.1117/12.717251
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

We recognize that the superposed light beams do not interact with each other to re-distribute their energy in space or time in the absence of interacting material dipoles. This platform requires that we re-visit the physical model behind the generation of pulses from the so-called "mode-locked" lasers. In the process, we come across the mathematical models behind formulating (i) the autocorrelation due to pulsed light and (ii) the group velocity of pulse propagation are based on the direct summation (integration) of non-causal infinite Fourier frequencies as if the EM waves can actually modify their energy distribution in the time domain. Accordingly, we show by modeling results and proposed experiments that time-frequency Fourier theorem can give rise to self-contradictory predictions, verifiable by simple laboratory experiments. Based on these results, we propose that we replace the paradigm of "interference of light" by "superposition effects due to light beams" as reported by the material dipoles of detectors and beam splitters.

Citation Download Citation

Chandrasekhar Roychoudhuri, Negussie Tirfessa, Colin Kelley, and Richard Crudo "If EM fields do not operate on each other, why do we need many modes and large gain bandwidth to generate short pulses?", Proc. SPIE 6468, Physics and Simulation of Optoelectronic Devices XV, 64681N (22 March 2007); https://doi.org/10.1117/12.717251

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