en عمومى General پژوهشي Research We report the observations of dual wavelength amplified spontaneous emission from the solutions of a conjugated polymer poly [2-methoxy-5-(2-ethylhexyloxy)-1, 4-phenylenevinylene] (MEH-PPV) in Tetrahydrofuran and 1, 2 Dichlorobenzene. We have prepared MEH-PPV using a modified procedure and purified several times in each step, the material offers low molecular weight, low polydispersity index and high thermal stability, which are some of the most important requirements for the fabrication of photo luminescent devices. The variation in the features of amplified spontaneous emission with increasing polymer concentration is presented. For intermediate polymer concentrations, narrow emissions were observed for the 0-0 and 0-1 vibronic peaks which were not reported in solutions to the best of our knowledge. The ASE characteristics sensitively depend on concentration as well as pump power. The gain studies show that MEH-PPV is a potential laser media. By varying the concentration of the solution and pump power we can use either of the two different wavelength bands for lasing applications. dual amplified spontaneous emission, laser gain, laser material, photoluminescence. 3 12 http://ijop.ir/browse.php?a_code=A-10-173-1&slc_lang=en&sid=1 G. Sreelekha sreelekhasatheesh@gmail.com 10031947532846001098 10031947532846001098 Yes International School of Photonics G. Vidya 10031947532846001099 10031947532846001099 No Department of Polymer Science and Rubber Technology K. Geetha 10031947532846001100 10031947532846001100 No Centre of Excellence in Lasers and Optoelectronic Sciences R. Joseph 10031947532846001101 10031947532846001101 No Department of Polymer Science and Rubber Technology S. Prathapan 10031947532846001102 10031947532846001102 No Department of Applied Chemistry P. Radhakrishnan 10031947532846001103 10031947532846001103 No Centre of Excellence in Lasers and Optoelectronic Sciences C.P.G. Vallabhan 10031947532846001104 10031947532846001104 No Centre of Excellence in Lasers and Optoelectronic Sciences V.P.N. Nampoori 10031947532846001105 10031947532846001105 No International School of Photonics