We report efficient second-harmonic generation in several commercially available telecommunication-grade single-mode and multimode optical fibers. We have investigated the effect of standard dopants such as germanium, phosphorous, and fluorine, and find that the efficient second-harmonic generation is associated with germaniarelated photosensitive color centers. We observed a 1.5% conversion efficiency in single-mode fibers with germanium-, phosphorous-, and fluorine-doped cores and high hydroxyl levels.
No takes yet. Share an insight, caveat, or question.
Saifi et al. (1988) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: