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圆偏振光和线偏振光在正常色散材料中的时空自压缩

Spatiotemporal Self-Compression of Circularly Polarized and Linearly Polarized Pulses in Normally Dispersive Media

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摘要

实验研究了圆偏振和线偏振高强度飞秒激光脉冲在正常色散材料中传输时的时空自压缩现象。实验中利用BK7玻璃作为正色散材料,比较研究了不同偏振入射情况下脉冲波形及频谱的变化规律。圆偏振光入射时,可以获得更短脉冲宽度的压缩脉冲和更窄的光谱宽度。在圆偏振光入射条件下,50 fs入射脉冲成功地自压缩到了19 fs,获得了大于2.5倍的压缩倍率。所以利用圆偏振光可以获得更短压缩脉冲,更大能量,更好光束质量的激光。

Abstract

Spatiotemporal self-compression of high-intensity femtosecond pulses with linear and circular polarization in normally dispersive media is experimentally studied. In the experiment, a piece of BK7 glass plate is used as the normally dispersive media. The temporal and spectral behavior of the pulse transmitting in the glass material under different input pulse conditions is studied. The compressed pulses are much shorter in duration and narrower in spectral bandwidth by using circularly polarized pulses than linearly polarized pulses. The 50 fs pulses with circular polarization are successfully compressed to 19fs, with a compression ratio more than 2.5.

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中图分类号:O437

所属栏目:超快光学

基金项目:国家自然科学基金(69925513,19974058)和中国科技部专项基金(G1999075204)资助课题。

收稿日期:2005-12-15

修改稿日期:2006-03-30

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李小芳:中国科学院上海光学精密机械研究所强场激光物理国家重点实验室, 上海 201800
刘军:中国科学院上海光学精密机械研究所强场激光物理国家重点实验室, 上海 201800
陈晓伟:中国科学院上海光学精密机械研究所强场激光物理国家重点实验室, 上海 201800
曾志男:中国科学院上海光学精密机械研究所强场激光物理国家重点实验室, 上海 201800
李儒新:中国科学院上海光学精密机械研究所强场激光物理国家重点实验室, 上海 201800

联系人作者:李小芳(lixf007@163.com)

备注:李小芳(1981~),女,江苏人,中国科学院上海光学精密机械研究所硕士研究生,主要从事超强超短激光脉冲的压缩与传输的研究。

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引用该论文

李小芳,刘军,陈晓伟,曾志男,李儒新. Spatiotemporal Self-Compression of Circularly Polarized and Linearly Polarized Pulses in Normally Dispersive Media[J]. Acta Optica Sinica, 2006, 26(12): 1882-1886

李小芳,刘军,陈晓伟,曾志男,李儒新. 圆偏振光和线偏振光在正常色散材料中的时空自压缩[J]. 光学学报, 2006, 26(12): 1882-1886

被引情况

【1】孔维鹏,曹士英,庞冬青,柴路,王清月,张志刚. 温度梯度控制成丝中的脉冲自压缩. 光学学报, 2010, 30(1): 299-303

【2】苏玉成,陈笑,钟悦,邹斌,王义全. 数值模拟不同偏振飞秒激光在石英介质中的传输过程和脉宽自压缩. 光学学报, 2010, 30(9): 2639-2645

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