We experimentally demonstrate the fabrication of a polarization-insensitive Ti₂AlN-based, fiberized saturable absorber (SA) for Q-switching of a fiber laser. The fabrication procedure for the SA is as follows. A mixture of Ti₂AlN/polyvinyl alcohol (PVA) composite solution was deposited onto a slide glass and spread evenly. After the spread Ti₂AlN/PVA composite dried, the formed film was stripped off the slide glass and transferred onto the flat end of a fiber connection/angled physical contact fiber ferrule. The modulation depth and saturation intensity of the resulting SA were measured to be ∼3.2% and ∼3.4 MW cm⁻², respectively. The sandwich-structured SA was successfully used to generate Q-switched pulses from an erbium-doped-fiber ring cavity. The temporal width of the Q-switched pulses with a repetition rate of 41.55 kHz was ∼2.52 μs at a wavelength ∼1557 nm.

我们实验证明用于光纤激光器的Q开关的偏振不敏感的Ti ₂ AlN基，纤维化的可饱和吸收体（SA）的制造。SA的制造过程如下。Ti ₂ AlN /聚乙烯醇（PVA）复合溶液的混合物沉积在载玻片上并均匀铺展。将铺展的Ti ₂ AlN / PVA复合材料干燥后，将形成的薄膜从载玻片上剥离下来，并转移到光纤连接/成角度的物理接触光纤套圈的扁平端上。测得所得SA的调制深度和饱和强度为〜3.2％和〜3.4 MW cm ^-2， 分别。夹层结构的SA已成功用于从掺b光纤环形腔中产生Q开关脉冲。与41.55千赫的重复频率的Q开关脉冲的时间宽度为~2.52 μ s的一个波长~1557纳米。