Volume no :17, Issue no: 1, January (2018)

SECOND HARMONIC GENERATION (SHG) FROM THERMALLY POLED Zn-Bi-Te-O-F GLASSES WITH VERY LONG RELAXATION TIME

Author's: Hiroyuki Nasu, Daichi Kinoshita, Shyohei Deguchi, Toshiki Okada, Yuki Uemura, Tadanori Hashimoto and Atsushi Ishihara
Pages: [11] - [22]
Received Date: November 13, 2017
Submitted by:
DOI: http://dx.doi.org/10.18642/jmseat_7100121888

Abstract

Second harmonic generation (SHG) was observed from a thermally poled Zn-Bi-Te-O-F glass system measured by Maker-Fringe pattern using Nd: YAG high power pulse laser. Both Bi and F were necessary for the generation, otherwise no SHG was observable from the glasses without Bi or F. The intensity of the generation depended on the F content. In the SHG from poled glasses, short relaxation time has been neck of the practical use. Although the generation of the common thermally poled glasses relaxed within 3 days, for those of the present glasses, the generation was maintained over 1 month. This is considered to be explained by the interaction of the dipoles between the large Bi ions binding the F ions inside of glasses.

Keywords

second harmonic generation (SHG), thermally poling, oxyfluoride glasses, bismuth ions, fluorine ions.