The Nonlinear absorption and its optical limiting properties of 2-methyl 4-nitroaniline-polymethylmethacrylate (2M4NA-PMMA) electro-spun nanofibers are investigated by Z-scan technique using Q switched Nd:YAG laser as an excitation source (532 nm, 5 ns, 10 Hz). Open-aperture measurements show that 2M4NA-PMMA nanofibers exhibit reverse saturable absorption. Intensity-dependent two-photon absorption coefficient demonstrates the presence of sequential two-photon absorption process involving real resonant intermediate states. The incorporation and orientation of 2M4NA in PMMA nanofibers are analyzed by XRD and it is found to range from 38 nm to 43 nm of crystallite size. SEM images illustrate the formation of smooth fibers using electrospinning by applying different voltages (12, 14, 17 kV). Ground-state absorption analysis shows that the nanofibers possess maximum absorption around 400 nm with a optical transmittance window (410–1200 nm) in the wide range of entire visible and NIR region. Lower optical limiting threshold (0.97 to 1.79 × 10¹² W/m²) of 2M4NA-PMMA nanofibers ensures the suitability of optical fibers as optical limiters towards the development of laser goggles for pulsed green laser.

以Q开关Nd：YAG激光作为激发源（532 nm，5 ns），通过Z扫描技术研究了2-甲基4-硝基苯胺-聚甲基丙烯酸甲酯（2M4NA-PMMA）电纺纳米纤维的非线性吸收及其光学极限性质。 ，10 Hz）。开孔测量表明2M4NA-PMMA纳米纤维表现出反向饱和吸收。依赖于强度的双光子吸收系数证明了涉及实际共振中间态的顺序双光子吸收过程的存在。通过XRD分析2M4NA在PMMA纳米纤维中的结合和取向，发现其晶粒尺寸在38 nm至43 nm之间。SEM图像说明了通过施加不同的电压（12、14、17 kV）使用静电纺丝形成的光滑纤维。基态吸收分析表明，纳米纤维在整个可见光和近红外区域的宽范围内都具有最大透光率窗口（410–1200 nm），在400 nm附近具有最大吸收。光学极限下限（0.97至1.79×10¹² W / m ²）的2M4NA-PMMA纳米纤维可确保光纤作为光学限制器的适用性，以发展脉冲绿激光的激光护目镜。