Analysis of the dispersion compensation of acousto-optic deflectors used for multiphoton imaging.

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.

journal_name

J Biomed Opt

authors

Zeng S,Lv X,Bi K,Zhan C,Li D,Chen WR,Xiong W,Jacques SL,Luo Q

doi

10.1117/1.2714061

subject

Has Abstract

pub_date

2007-03-01 00:00:00

pages

024015

issue

2

eissn

1083-3668

issn

1560-2281

journal_volume

12

pub_type

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