Coherent control of optical precursors in a warm atomic system with Doppler effects |
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Authors: | Yandong Peng Aihong Yang Yan Xu Dehua Li Haifeng Yao |
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Institution: | 1. Department of Applied Physics, College of Science, Shandong University of Science and Technology, Qingdao, Shandong 266590, China;2. Shanghai Institute of Applied Physics, Chinese Academy of Science, Shanghai 201800, China |
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Abstract: | We theoretically study coherent control of optical precursors via active Raman gain (ARG) in an N-type warm atomic system. When a step pulse passes through an ARG window, main fields are advanced due to fast-light effect and constructively interference with optical precursors, then an enhanced transient pulse appears. As the control field decreases, the interference effect is strengthened, and the transient pulse builds up and becomes narrow. Moreover, its peak intensity is inverse to the system temperature and also determined by the input-pulse form. The scheme may be useful in designing optical devices in optical communication. |
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Keywords: | 42 50 Gy 42 50 Md |
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