中国物理B ›› 2022, Vol. 31 ›› Issue (8): 87801-087801.doi: 10.1088/1674-1056/ac5e9a
High-dispersive mirror for pulse stretcher in femtosecond fiber laser amplification system
Wenjia Yuan(袁文佳)1, Weidong Shen(沈伟东)1,†, Chen Xie(谢辰)2, Chenying Yang(杨陈楹)1, and Yueguang Zhang(章岳光)1
- 1 State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China;
2 Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education, College of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
High-dispersive mirror for pulse stretcher in femtosecond fiber laser amplification system
Wenjia Yuan(袁文佳)1, Weidong Shen(沈伟东)1,†, Chen Xie(谢辰)2, Chenying Yang(杨陈楹)1, and Yueguang Zhang(章岳光)1
- 1 State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China;
2 Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education, College of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
摘要： We present a high-dispersive multilayer mirror for pulse stretching in a femtosecond fiber laser amplification system. The designed mirror contains 54 layers with a total physical thickness of 7.3 μm, which can provide a positive group delay dispersion (GDD) of 600 fs2 and a high reflectance over 99.9% from 1010 to 1070 nm. The samples were prepared by dual ion beam sputtering. The measured transmittance matches well with the theoretical result. The GDD characteristics of samples were tested by home-made white light interferometer. The measured GDD is higher than the design results, an average GDD of +722 fs2 from 1010 nm to 1070 nm. The mirrors were employed in a Yb-doped large-mode-area photonic crystal fiber amplification system. An input pulse compressed by the gratings with autocorrelation function of 83 fs is obtained with a stretched FWHM of 1.29 ps after 28 bounces between the dispersive mirrors. The results show that the multilayer dispersive mirror could be an effective and promising technique for pulse stretching in femtosecond amplification systems.
中图分类号: (Optical properties of bulk materials and thin films)
- 78.20.-e