We demonstrated a Q-switched Erbium-doped fiber laser (EDFL) using indium-tin-oxide (ITO) deposited onto D-shape fiber as a saturable absorber (SA). The D-shaped fiber was prepared using polishing wheel technique while the ITO was deposited onto the polished surface using electron beam deposition technique to establish excellent evanescent field interaction between the material and light on the surface of the polished region. The SA device was deployed into EDFL ring cavity to generate Q-switched pulses operating at 1566.4 nm. It was able to initiate pulses as short as 2.3 µs with the highest repetition rate of 52.77 kHz. Stability of the SA is proven as it produced stable pulses within the pump power of 55.2–96.4 mW with signal to noise ratio of 58.6 dB. Q-switched EDFL generates pulses with the output power of 300 µW and pulse energy of 5.68 nJ at 96.4 mW pump power. Therefore, ITO deposited onto D-shape fiber can be deployed as SA in EDFL cavity for portable Q-switched laser source.

我们展示了一种使用铟锡氧化物（ITO）沉积在D形光纤上作为可饱和吸收剂（SA）的调Q掺Er光纤激光器（EDFL）。使用抛光轮技术制备D形光纤，同时使用电子束沉积技术将ITO沉积到抛光表面上，以在材料和抛光区域表面上的光之间建立出色的渐逝场相互作用。SA器件被部署到EDFL环形腔中，以产生工作在1566.4 nm的调Q脉冲。它能够启动短至2.3 µs的脉冲，最高重复频率为52.77 kHz。SA的稳定性得到了证明，因为它在55.2–96.4 mW的泵浦功率内产生了稳定的脉冲，信噪比为58.6 dB。调Q的EDFL产生的脉冲输出功率为300 µW，脉冲能量为5。在96.4 mW泵浦功率下为68 nJ。因此，沉积在D形光纤上的ITO可以作为SA部署在EDFL腔中，用于便携式Q开关激光源。