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Chin. Phys. B, 2016, Vol. 25(7): 070302    DOI: 10.1088/1674-1056/25/7/070302
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Improving the intensity and efficiency of compressed echo in rare-earth-ion-doped crystal

Xiu-Rong Ma(马秀荣)1,2, Yu-Qing Liang(梁裕卿)1, Song Wang(王松)1, Shuang-Gen Zhang(张双根)1,2, Yun-Long Shan(单云龙)1
1 Department of Computer and Communication Engineering, Tianjin University of Technology, Tianjin 300384, China;
2 Engineering Research Center of Communication Devices and Technology, Ministry of Education; Tianjin Key Laboratory of Film Electronic and Communication Devices, Tianjin 300384, China
Abstract  We investigate the intensity and efficiency of a compressed echo, which is important in arbitrary waveform generation (AWG). A new model of compressed echo is proposed based on the optical Bloch equations, which exposes much more detailed parameters than the conventional model, such as the time delay of the chirp lasers, the nature of the rare-earth-ion-doped crystal, etc. According to the novel model of compressed echo, we find that reducing the time delay of the chirp lasers and scanning the lasers around the center frequency of the inhomogeneously broadened spectrum, while utilizing a crystal with larger coherence time and excitation lifetime can improve the compressed echo's intensity and efficiency. The theoretical analysis is validated by numerical simulations.
Keywords:  intensity and efficiency      compressed echo      arbitrary waveform generation      optical Bloch equations  
Received:  11 October 2015      Revised:  22 January 2016      Published:  05 July 2016
PACS:  03.65.Sq (Semiclassical theories and applications)  
  14.70.Bh (Photons)  
  34.80.Pa (Coherence and correlation)  
  42.50.Md (Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency)  
Fund: Project supported by Special Funds for Scientific and Technological Innovation Projects in Tianjin, China (Grant No. 10FDZDGX00400) and the Tianjin Research Program of Application Foundation and Advanced Technology, China (Grant No. 15JCQNJC01100).
Corresponding Authors:  Yu-Qing Liang     E-mail:

Cite this article: 

Xiu-Rong Ma(马秀荣), Yu-Qing Liang(梁裕卿), Song Wang(王松), Shuang-Gen Zhang(张双根), Yun-Long Shan(单云龙) Improving the intensity and efficiency of compressed echo in rare-earth-ion-doped crystal 2016 Chin. Phys. B 25 070302

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