Abstract We demonstrate a Q-switched Erbium-doped fiber laser (EDFL) with a tunable output wavelength using Nickel oxide (NiO) saturable absorber (SA) in conjunction with a Sagnac loop mirror (SLM) filter. The proposed SA was prepared by embedding NiO nanoparticles obtained bysimplistic sonochemical reaction into polyethylene oxide (PEO). The NiO PEO film was integrated into a figure-of-eight resonator configured with a SLM to generate Q-switched pulses with a tunable output wavelength. As the SLM temperature was increased from 30 °C to 70 °C, the laser operation can be tuned from 1551.9 nm to 1544.1 nm. At 1551.9 nm operation, the repetition rate rose from 36.2 kHz to 40.3 kHz and the pulse duration reduced from 10.00 to 9.32 μs when the pump power rose from 131.5 to 161.0 mW. At the highest pump power of 161.0 mW, the maximum output power and pulse energy were obtained at 0.67 mW and 16.6 nJ. For Q-switched operation at 1544.1 nm, the produced Q-switched pulse exhibited a pulse duration of 8.88 μs, the repetition rate of 45.7 kHz, the highest output power of 0.60 mW and pulse energy of 13.1 nJ at the maximum pump power of 161.0 mW.

中文翻译：

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使用氧化镍可饱和吸收器和萨格纳克环路镜面滤波器的 Q 开关和可调谐波长光纤激光器

摘要 我们展示了一种使用氧化镍 (NiO) 可饱和吸收体 (SA) 和萨格纳克环反射镜 (SLM) 滤波器的具有可调输出波长的 Q 开关掺铒光纤激光器 (EDFL)。所提出的 SA 是通过将通过简单的声化学反应获得的 NiO 纳米粒子嵌入聚环氧乙烷 (PEO) 中制备的。NiO PEO 薄膜被集成到一个配置有 SLM 的 8 字形谐振器中，以产生具有可调输出波长的 Q 开关脉冲。随着 SLM 温度从 30 °C 增加到 70 °C，激光操作可以从 1551.9 nm 调谐到 1544.1 nm。在 1551.9 nm 操作下，当泵浦功率从 131.5 mW 上升到 161.0 mW 时，重复率从 36.2 kHz 上升到 40.3 kHz，脉冲持续时间从 10.00 μs 下降到 9.32 μs。在 161.0 mW 的最高泵浦功率下，最大输出功率和脉冲能量在 0.67 mW 和 16.6 nJ 时获得。对于 1544.1 nm 的 Q 开关操作，产生的 Q 开关脉冲的脉冲持续时间为 8.88 μs，重复率为 45.7 kHz，最高输出功率为 0.60 mW，脉冲能量为 13.1 nJ，最大泵浦功率为 161.0兆瓦。