1 March 2007 Analysis of the dispersion compensation of acousto-optic deflectors used for multiphoton imaging
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Abstract
The acousto-optic deflector (AOD) is highly preferred in laser scanning microscopy for its fast scanning ability and random-addressing capability. However, its application in two-photon microscopy is frustrated by the dispersion of the AOD, which results in beam distortion and pulse lengthening. We report the analysis of simultaneous compensation for the angular dispersion and temporal dispersion of the AOD by merely introducing a single dispersive element such as a prism or a grating. Besides serving as a scanner, the AOD is also a part of the compressor pair by integrating the dispersive nature of the AO interaction. This compensation principle is effective for both one-dimensional (1-D) AOD and two-dimensional (2-D) AOD scanning. Switching from a 1-D to a 2-D system requires proper optical alignment with the compensation element, but does not involve any new components. Analytical expressions are given to illustrate the working principle and to help with understanding the design of the system. Fluorescence images of beads and cells are shown to demonstrate the performance of two-photon microscopy when applying this compensated 2-D AOD as scanner.
© (2007) Society of Photo-Optical Instrumentation Engineers (SPIE)
Shaoqun Zeng, Shaoqun Zeng, Xiaohua Lv, Xiaohua Lv, Kun Bi, Kun Bi, Chen Zhan, Chen Zhan, Derong Li, Derong Li, Wei R. Chen, Wei R. Chen, Wenhui Xiong, Wenhui Xiong, Steven L. Jacques, Steven L. Jacques, Qingming Luo, Qingming Luo, } "Analysis of the dispersion compensation of acousto-optic deflectors used for multiphoton imaging," Journal of Biomedical Optics 12(2), 024015 (1 March 2007). https://doi.org/10.1117/1.2714061 . Submission:
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