ABSTRACT A temporal and amplitude modulator based on few-layers bismuth telluride (Bi2Te3) flakes is demonstrated for C-band operation. The few-layers thick Bi2Te3 flakes are prepared by mechanically exfoliating a Bi2Te3 crystal. As an optical pulse modulator, the Bi2Te3-based saturable absorber (SA) provides stable Q-switching operation at 1561.1 nm with a maximum repetition rate of 70.92 kHz and minimum pulse width of 2.38 µs. As an optical amplitude modulator, two linear regions at different pump power ranges are obtained in the regression line of the peak intensity. The first linear region covers a pump power range from 0.0 to 80.32 mW and corresponds to a modulation efficiency of 0.05 dB/mW, while the second linear region covers a pump power range of 80.32–98.64 mW with a modulation efficiency of 0.81 dB/mW.

中文翻译：

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使用基于 Bi2Te3 的光调制器在 C 波段区域进行时间和幅度调制

摘要 展示了一种基于几层碲化铋 (Bi2Te3) 薄片的时间和幅度调制器，用于 C 波段操作。几层厚的 Bi2Te3 薄片是通过机械剥离 Bi2Te3 晶体制备的。作为光脉冲调制器，基于 Bi2Te3 的可饱和吸收器 (SA) 在 1561.1 nm 处提供稳定的 Q 开关操作，最大重复率为 70.92 kHz，最小脉冲宽度为 2.38 µs。作为光调幅器，在峰值强度的回归线中得到两个不同泵浦功率范围的线性区域。第一个线性区域覆盖了 0.0 到 80.32 mW 的泵浦功率范围，对应的调制效率为 0.05 dB/mW，而第二个线性区域覆盖了 80.32–98.64 mW 的泵浦功率范围，调制效率为 0.81 dB/mW .