Goodarzi A, Ghanaatshoar M, Mozafari M
Laser and Plasma Research Institute, Shahid Beheshti University, G.C., Evin, 1983969411, Tehran, Iran.
Advanced Instrumentation Technology Development Center, Niroo Research Institute, Dadman Blvd., 1468613113, Tehran, Iran.
Sci Rep. 2018 Oct 18;8(1):15340. doi: 10.1038/s41598-018-33426-7.
A fiber optic-based all-optical amplifier is designed by using the coherent perfect absorption phenomenon. For this purpose, we use a deposited chromium thin layer as an absorbent material on the cross-section of a PM fiber. By placing another fiber in front of the deposited one, we show that by controlling the relative phase between the two counter-propagating beams, total absorbance can be controlled. In the interaction of two beams with unequal intensities, absorption control can be associated with amplification for the weaker beam. By using this mechanism, the effect of an external phase-shifting parameter can be amplified. Furthermore, it is possible to amplify a small signal riding on a CW background through this all-optical procedure.
基于相干完美吸收现象设计了一种光纤全光放大器。为此，我们在保偏光纤的横截面上使用沉积的铬薄层作为吸收材料。通过在沉积有铬薄层的光纤前放置另一根光纤，我们表明通过控制两束反向传播光束之间的相对相位，可以控制总吸收率。在两束强度不等的光束相互作用中，吸收控制可与较弱光束的放大相关联。利用这一机制，可以放大外部相移参数的影响。此外，通过这种全光过程，可以放大叠加在连续波背景上的小信号。
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