Improving the intensity and efficiency of compressed echo in rare-earth-ion-doped crystal

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...

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Bibliographic Details
Published in:Chinese physics B 2016-07, Vol.25 (7), p.124-130
Main Author: 马秀荣 梁裕卿 王松 张双根 单云龙
Format: Article
Language:English
Subjects:
任意波形发生器
压缩
回波模型
强度
扫描激光器
掺杂晶体
时间延迟
稀土离子
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Summary: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-iondoped 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.
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/25/7/070302