This paper demonstrate experimentally the generation of a stable switchable dual-wavelength Q-switched fiber laser. The pulsed fiber lasers is generated from deposited Indium Tin Oxide (ITO) saturable absorber (SA) on fiber ferrule, which is prepared by using DC Magnetron Sputtering. The deposited ITO SA is then being sandwiched in between the two fiber ferrules. A stable switchable dual-wavelength is generated by the aid of two cascaded fiber Bragg gratings (FBGs). To achieve a flexible switched in individual wavelength of 1532 or 1533 nm and simultaneously dual-wavelength fiber laser, the in line polarization controller is utilized to control the mode competition in the fiber laser cavity. The proposed fiber laser is capable of generating output at the pump power of 118.10 mW, centered at wavelength 1532 nm. The proposed design is having a repetition rate of 48.30 kHz and a pulse width of 5.22 µs. Similarly, at 1533 nm, it generates a repetition rate of 25.61 kHz and a pulse width of 7.72 µs. The output is also observed to remain unchanged over time, indicating high stability with the signal to noise ratio of 52.70 dB and 52.00 dB at wavelength 1532 nm and 1533 nm, respectively. The combination between ITO and cascaded FBG can offer a feasible and straightforward candidate for a multiwavelength fiber laser according to these results. Laser radar and terahertz generation may become a few of the potential fields that related to this work.

本文通过实验证明了稳定的可切换双波长调Q光纤激光器的产生。脉冲光纤激光器是由光纤箍上沉积的铟锡氧化物（ITO）饱和吸收体（SA）产生的，该箍是使用DC磁控溅射法制备的。然后将沉积的ITO SA夹在两个光纤插芯之间。借助于两个级联的光纤布拉格光栅（FBG），可产生稳定的可切换双波长。为了实现在1532或1533 nm的单个波长中的灵活切换并同时在双波长光纤激光器中实现切换，在线偏振控制器用于控制光纤激光器腔中的模式竞争。所提出的光纤激光器能够以118.10 mW的泵浦功率产生输出，中心波长为1532 nm。拟议的设计具有48.30 kHz的重复频率和5.22 µs的脉冲宽度。同样，在1533 nm处，它产生的重复频率为25.61 kHz，脉冲宽度为7.72 µs。还观察到输出随时间保持不变，表明在波长1532 nm和1533 nm处的信噪比分别为52.70 dB和52.00 dB，具有很高的稳定性。根据这些结果，ITO和级联FBG的组合可以为多波长光纤激光器提供可行且直接的候选方案。激光雷达和太赫兹的产生可能会成为与此工作相关的一些潜在领域。表示高稳定性，在波长1532 nm和1533 nm处的信噪比分别为52.70 dB和52.00 dB。根据这些结果，ITO和级联FBG的组合可以为多波长光纤激光器提供可行且直接的候选方案。激光雷达和太赫兹的产生可能会成为与此工作相关的一些潜在领域。表示高稳定性，在波长1532 nm和1533 nm处的信噪比分别为52.70 dB和52.00 dB。根据这些结果，ITO和级联FBG的组合可以为多波长光纤激光器提供可行且直接的候选方案。激光雷达和太赫兹的产生可能会成为与此工作相关的一些潜在领域。