Analysis on dispersion characteristics of group-phase-controllable optical delay line

SHAO Yong-hong; HE Yong-hong; WANG Shu-xia; MA Hui

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Analysis on dispersion characteristics of group-phase-controllable optical delay line

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- Analysis on dispersion characteristics of group-phase-controllable optical delay line
- Optics and Precision Engineering Vol. 14, Issue 6, Pages: 965-968(2006)
- 作者机构：
  
  清华大学深圳研究生院,广东深圳 518055
- 作者简介：
- 基金信息：
- DOI：
  CLC： TH703
- Received：12 April 2006，
  
  Revised：08 October 2006，
  
  Published Online：30 December 2006，
  
  Published：30 December 2006
- 稿件说明：
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SHAO Yong-hong, HE Yong-hong, WANG Shu-xia, et al. Analysis on dispersion characteristics of group-phase-controllable optical delay line[J]. Optics and precision engineering, 2006, 14(6): 965-968.
DOI：

SHAO Yong-hong, HE Yong-hong, WANG Shu-xia, et al. Analysis on dispersion characteristics of group-phase-controllable optical delay line[J]. Optics and precision engineering, 2006, 14(6): 965-968. DOI：

摘要

分析了光学相干层析(OCT)成像系统的色散特性。分析表明

系统色散与振镜离焦量成正比关系

且在一倍焦距以内为负色散

在一倍焦距以外为正色散。设计了纵向分辨率为8 μm的OCT系统

测得振镜位于傅里叶透镜焦点外0.5 mm处时

系统产生的色散值约为77 fs

实验结果与理论相符合。

Abstract

The dispersion characteristics of optical coherence tomography (OCT) system were particularly analyzed. It is found that the dispersion is proportion to the defocus distance of a galvanometer

with negative in the focus length

dispersion

and with possive dispersion out the focus length. A OCT with spatial resolution of 8 μm is designed. The dispersion of 77 fs

is measured in this OCT system when the galvanometer is 0.5 mm far away from the focal length of Fourier lens. The relation between dispersion and the distance away from focus is experimentally validated

and the experimental results are agreed with theory well.

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Related Institution

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