Mujamammi Wafa Musa, Prasad Saradh, AlSalhi Mohamad S, Masilamani Vadivel
Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
Research Chair on Laser Diagnosis of Cancers, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
Polymers (Basel). 2016 Oct 14;8(10):364. doi: 10.3390/polym8100364.
Optically pumped conjugated polymer lasers are good competitors for dye lasers, often complementing and occasionally replacing them. This new type of laser material has broad bandwidths and high optical gains comparable to conventional laser dyes. Since the Stokes' shift is unusually large, the conjugated polymer has a potential for high power laser action, facilitated by high concentration. This paper reports the results of a new conjugated polymer, the poly(9,9-dioctyl-2,7-divinylenefluorenylene)---{2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene} material, working in the green region. Also discussed are the spectral and temporal features of the amplified spontaneous emissions (ASE) from the conjugated polymer PFO--MEH-PPV in a few solvents. When pumped by the third harmonic of the Nd:YAG laser of 10 ns pulse width, the time-resolved spectra of the ASE show relaxation oscillations and spikes of 600 ps pulses. To the best of our knowledge, this is the first report on relaxation oscillations in conjugated-polymer lasers.
光泵浦共轭聚合物激光器是染料激光器的有力竞争者，常常补充并偶尔替代染料激光器。这种新型激光材料具有与传统激光染料相当的宽带宽和高光增益。由于斯托克斯位移异常大，共轭聚合物在高浓度的促进下具有产生高功率激光作用的潜力。本文报道了一种新型共轭聚合物聚[(9,9 - 二辛基 - 2,7 - 二乙烯撑芴撑) - {2 - 甲氧基 - 5 - (2 - 乙基己氧基) - 1,4 - 亚苯基}](PFO - MEH - PPV)材料在绿色区域的工作情况。还讨论了共轭聚合物PFO - MEH - PPV在几种溶剂中的放大自发辐射(ASE)的光谱和时间特性。当用脉宽为10 ns的Nd:YAG激光器的三次谐波泵浦时，ASE的时间分辨光谱显示出弛豫振荡和600 ps脉冲的尖峰。据我们所知，这是关于共轭聚合物激光器中弛豫振荡的首次报道。
