| 钛宝石激光器中用优化Gires-Tournois镜产生15 fs脉冲 |
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| 引用本文： | 吴祖斌,王专,廖春艳,韩英魁,曹士英,张志刚,王清月,邵建达.钛宝石激光器中用优化Gires-Tournois镜产生15 fs脉冲[J].光学学报,2005,25(2):16-219. |
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| 作者姓名： | 吴祖斌 王专 廖春艳 韩英魁 曹士英 张志刚 王清月 邵建达 |
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| 作者单位： | 天津大学精仪学院超快激光器研究室,教育部光电信息技术科学重点实验室,天津,300072;中国科学院上海光学精密机械研究所光学薄膜技术研究与发展中心,上海,201800 |
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| 基金项目： | 国家自然科学基金(60378005)，国家重点基础研究专项经费(G1999075201)资助课题。 |
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| 摘 要： | 根据飞秒脉冲锁模钛宝石激光器脉冲压缩的要求，介绍了负色散镜补偿色散的基本原理及其特点。详细阐述了优化Gires-Tournois(OG-T)镜的设计过程，并通过计算机优化得到理想设计膜系。采用离子束溅射的方法镀制了优化Gires—Tournois镜。测量了优化Gires-Tournois镜(编号为OGT#1)的透射率和群延迟色散，并与设计值进行了比较，分析了实测值产生偏差的原因，从而对镀膜参量进行了相应的调整，制造了第二批优化Gires—Tournois镜(编号为OGT#2)。将优化Gires—Tournois镜用于钛宝石激光器振荡级内，单程5次通过三个优化Gires-Tournois镜，补偿了激光器腔内色散，实现了飞秒锁模脉冲运转。用OGT#1先进行了实验，获得32fs的脉冲和46nin的光谱宽度。用调整参量后的OGT#2进行了实验，获得了15fs的超短脉冲和91nm的光谱宽度。实验很好的验证了负色散镜补偿色散的优点，为国内啁啾镜的研制创造了条件。
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| 关 键 词： | 激光器 负色散镜 优化Gires-Tournois镜 飞秒激光器 |
| 收稿时间： | 2004/3/18 |
Generation of 15 fs Pulses from Ti: Sapphire Laser with Optimized Gires-Tournois Mirrors |
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| Wu Zubin,Wang Zhuan,Liao Chunyan,Han Yingkui,Cao Shiying,Zhang Zhigang,Wang Qingyue,Shao Jianda.Generation of 15 fs Pulses from Ti: Sapphire Laser with Optimized Gires-Tournois Mirrors[J].Acta Optica Sinica,2005,25(2):16-219. |
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| Authors: | Wu Zubin Wang Zhuan Liao Chunyan Han Yingkui Cao Shiying Zhang Zhigang Wang Qingyue Shao Jianda |
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| Institution: | Wu Zubin 1 Wang Zhuan 1 Liao Chunyan 2 Han Yingkui 1 Cao Shiying 1 Zhang Zhigang 1 Wang Qingyue 1 Shao Jianda 2 1 The Key Laboratory of Optoelectronic Information Technical Science,EMC,Ultrafast Laser Laboratory,School of Precision Instruments & Optoelectronics Engineering,Tianjin University,Tianjin 300072 2 R&D Center for Optical Thin Film Coatings,Shanghai Institute of Optics and Fine Mechanics,The Chinese Academy of Sciences,Shanghai 201800 |
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| Abstract: | According to the mode-locked femt second Ti∶sapphire laser pulse compression, the characteristics and principles of dispersion compensation of negative dispersion mirrors were introduced. Optimized Gires-Touronis (OG-T) mirrors were designed and fabricated. OG-T mirrors were deposited by means of ion-beam sputtering onto superpolished substrates. The transmittance and group dispersion delay of first fabricated OG-T (OGT#1) mirrors were measured. Film coating parameters were adjusted according with design value. After that, second fabricated OG-T (OGT#2) mirrors were fabricated. Dispersion was compensated by 5 bounces during 3 OG-T mirrors from mode-locked femtosecond Ti∶sapphire laser. 32 fs pulse (46 nm spectrum width) and 15 fs pulse (91 nm spectrum width) were obtained respectively by OGT#1 and OGT#2. The excellent features of negative dispersion mirrors were proved by the experiment and the fine chirped mirrors could be fabricated. |
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| Keywords: | lasers negative dispersion mirrors optimized Gires-Tournois mirrors femtosecond laser |
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