Observation of persistent multiple-holes
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Ryuzi Yano; Naoshi Uesugi; Tsuneo Fukuda; Yoshiro Takahashi
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Article
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1999
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Elsevier Science
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English
⚖ 160 KB
A multiple-hole structure with a center hole of more than 20% depth was observed in the persistent hole-burning 4 Ž . 4 3 q spectroscopy for the F 1 -I transition of the Nd doped silicate glass fiber at 1.5 K using a diode laser. The 3r2 9 r2 multiple-hole structure was attributed to the hyperfine