Model of second-harmonic generation in glass fibers based on multiphoton ionization interference effects

Dana Z. Anderson; Victor Mizrahi; John E. Sipe

doi:10.1117/12.51165

30 December 1991 Model of second-harmonic generation in glass fibers based on multiphoton ionization interference effects

Dana Z. Anderson, Victor Mizrahi, John E. Sipe

Author Affiliations +

Proceedings Volume 1516, International Workshop on Photoinduced Self-Organization Effects in Optical Fiber; (1991) https://doi.org/10.1117/12.51165
Event: International Workshop on Photoinduced Self-Organization Effects in Optics, 1991, Quebec City, Canada

Abstract

A self-consistent model of second harmonic generation in fibers is based upon multiphoton ionization interference effects. An atom subject to a pair of harmonically related fields can exhibit a preferred direction of photoelectron emission that is dependent upon the relative phase between the two fields. Our model focuses on defects sites that require four fundamental frequency photons for ionization. In this case, phase-matched interference effects arise between four and three photon ionization and three and two photon ionization. We also qualitatively compare the four photon case with the two photon case in which there is only one interference term. The defects are modeled using a one-dimensional picture, with plane waves for ionized electron states. Both the four and two photon cases show exponential small signal spatial gain in steady state. The saturation characteristics can be different in the two cases, however. Results for the four photon model are in reasonable agreement with experimental observations. We discuss some of the limitations of our current model and possible future enhancements.

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Dana Z. Anderson, Victor Mizrahi, and John E. Sipe "Model of second-harmonic generation in glass fibers based on multiphoton ionization interference effects", Proc. SPIE 1516, International Workshop on Photoinduced Self-Organization Effects in Optical Fiber, (30 December 1991); https://doi.org/10.1117/12.51165

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