個別研究テーマ編集

光機能物質
教授 大石泰丈

掲載年度

2021

個別研究テーマ
(日本語)

複屈折率テルライト光ファイバ中の四光波混合、誘導ラマン散乱および相互位相変調によるスーパーコンティニューム光の発生

個別研究テーマ
(英語)

Supercontinuum governed by four-wave mixing, stimulated Raman scattering and cross-phase modulation in a birefringent tellurite fiber

研究者 トウン ホアン トアン
鈴木健伸
大石泰丈
研究概要

The supercontinuum (SC) generations in a birefringent TeO2-ZnO-Na2O-Bi2O3 (TZNB) tellurite microstructured optical fiber (BTMOF) have been demonstrated by pumping near the zero-dispersion wavelengths (ZDWs) with a tunable picosecond erbium-doped fiber laser. When the pump is polarized parallel with the x-axis of the BTMOF, the SC broadening is governed by the four-wave mixing (FWM), stimulated Raman scattering (SRS) and cross-phase modulation (XPM). The FWM signal can be generated from 1538 to 1293 nm, and the idler can be emitted from 1597 to 1907 nm. Due to the high nonlinear property of the BTMOF, the XPM between the FWM signal and idler can be significantly amplified by the cascaded FWM effect. When the pump is polarized parallel with the y-axis of the BTMOF, the SC is broadened by the Stokes and anti-Stokes SRS. A broadest Stokes SRS band with a 10-dB bandwidth of 232 nm is generated by pumping at 1545 nm with an average pump power of 23.8 dBm. Potentially, widely tunable fiber lasers can be developed by exploring the FWM or SRS in highly nonlinear tellurite fibers with tailored dispersion profiles. The SC evolutions agree well with the numerical simulation.

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