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arXiv:1812.07783 · Optics Communications

The manipulated left-handedness in a rare-earth-ion-doped optical fiber by the incoherent pumping field

Shun‐Cai Zhao, Hongwei Guo, Xiaojing Wei

Published May 12, 2017• 6 citations
arXivHTMLPDF
DOI
10.1016/j.optcom.2017.05.003

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We researched the realization of novel optical functions of glass by combining an external electromagnetic field induced electronic structure and rare-earth-ions. We reviewed the phenomena, mechanisms, and the applications of photostimulated luminescence induced by X-ray, long-lasting phosphorescence by ultra-violet light, space-selective manipulation of the valence state of rare-earth-ion, and the formation of rare-earth-ion-doped optical waveguide for light amplification by a focused infrared femtosecond laser. The proposed concept will lead to a new possibility in the realization of novel optical functions for rare-earth-ion-doped glasses.
Long-lived population storage in optically pumped levels of rare-earth ions doped into solids, referred to as persistent spectral hole burning, is of significant fundamental and technological interest. However, the demonstration of deep and persistent holes in rare-earth ion doped amorphous hosts, e.g., glasses, has remained an open challenge for many decades---a fact that motivates our work towards a better understanding of the interaction between impurities and vibrational modes in glasses. Here we report the observation and detailed characterization of such holes in an erbium-doped silica glass fiber cooled to below 1 K. We demonstrate population storage in electronic Zeeman sublevels of the erbium ground state with lifetimes up to 30 seconds and 80% spin polarization. In addition to its fundamental aspect, our investigation reveals a potential technological application of rare-earth ion doped amorphous materials, including at telecommunication wavelength.