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Volume 26 - ICOP & ICPET 2020
ICOP & ICPET _ INPC _ ICOFS 2020, 26 - ICOP & ICPET 2020: 841-844 |
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Rafieipour P, Ghasempour Ardakani A. Improvement of the operation of random lasers by using a double-sided tape. ICOP & ICPET _ INPC _ ICOFS 2020; 26 :841-844
URL: http://opsi.ir/article-1-1959-en.html
URL: http://opsi.ir/article-1-1959-en.html
1- Department of Physics, College of Science, Shiraz University, Shiraz, Iran
Abstract: (1381 Views)
In this paper, we fabricate a random laser based on a glass substrate as the scattering medium and the solution of rhodamine B dye doped SU-8 polymer as the gain medium. Then, we investigate the possibility of the emission of random laser light from the fabricated sample. Then, we stick a double-sided tape to the sample in order to provide the external feedback for random lasing emission. By the investigation and comparison of the emission spectra and lasing thresholds at two different pump positions (P1 and P2) corresponding to the sample with and without the tape, we come to this conclusion that providing external feedback results in the considerable increase of the random laser emission intensity by a factor of 1.5 and 4.22 at the pump positions P1 and P2, respectively. Also, the random laser threshold decreases by a factor of 1.6 and 1.8 at these two pump positions, respectively. The results of this study can suggest a simple and inexpensive method for the improvement of the operation of random lasers.
Keywords: random laser, multiple light scattering, glass substrate, double-sided tape, external feedback.
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