Acousto-optic modulator system for femtosecond laser pulses

被引：7

作者：

Zeng, Shaoqun ^{[1
]}

Bi, Kun ^{[1
]}

Xue, Songchao ^{[1
]}

Liu, Yujing ^{[1
]}

Lv, Xiaohua ^{[1
]}

Luo, Qingming ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Dept Biomed Engn, Wuhan Natl Lab Optoelect, Minist Educ,Key Lab Biomed Photon, Wuhan 430074, Peoples R China

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2007年 / 78卷 / 01期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2409868

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Femtosecond laser pulses have made a revolution in multiphoton excitation microscopy, micromachining, and optical storage for their unprecedented high peak power. However, modulation of their intensity with acousto-optic modulator (AOM) is frustrated by dispersion which results in a significant stretch in pulse width. Here we report a scheme composed of two acousto-optic deflectors (AODs) to modulate the intensity of the femtosecond laser pulses with simultaneous compensation for the temporal dispersion. With commercial AODs, we demonstrated such an AOM system for the femtosecond laser pulses with overall transmission efficiency of around 80%. The pulse width of the exit beam is 115-177 fs for an input pulse of 110 fs, across the wavelength range of 720-920 nm when the temporal dispersion compensation is optimally tuned at 800 nm. The fluorescence intensity in a two-photon microscopy experiment performed using this system increased 5.5-fold over that of the uncompensated AOM. (c) 2007 American Institute of Physics.

引用

页数：4

共 13 条

[1]

Das P.K., 1991, ACOUSTOOPTIC SIGNAL

[2]

Diels J. C., 1996, ULTRASHORT LASER PUL

[3] Double-pass acousto-optic modulator system [J].