OCT imaging with temporal dispersion induced intense and short coherence laser source.

OCT imaging with temporal dispersion induced intense and short coherence laser source.
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DOI:
10.1016/j.optcom.2016.04.073
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发表时间:
2016-10-01
影响因子:
2.4
通讯作者:
Li G
Li G
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Manna SK;le Gall S;Li G

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低相干长度和高光强是高分辨率、大穿透深度OCT成像对光源的两个必不可少的要求。虽然巨大的兴趣正在支付工程上的各种激光源,以扩大其带宽,从而降低相干长度,在这里,我们展示了另一种方法,采用强时间色散到现有的激光源。胆甾型液晶(CLC)细胞与适当的色散斜率在1-D有机光子带隙的边缘已被设计为提供最大的相干体积减少,同时保持高于50%的强度。作为一个例子,多模He-Ne激光器的相干长度减少了730倍以上。
Lower coherence length and higher intensity are two indispensable requirements on the light source for high resolution and large penetration depth OCT imaging. While tremendous interest is being paid on engineering various laser sources to enlarge their bandwidth and hence lowering the coherence length, here we demonstrate another approach by employing strong temporal dispersion onto the existing laser source. Cholesteric liquid crystal (CLC) cells with suitable dispersive slope at the edge of 1-D organic photonic band gap have been designed to provide maximum reduction in coherence volume while maintaining the intensity higher than 50%. As an example, the coherence length of a multimode He–Ne laser is reduced by more than 730 times.
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发表时间: 1999-01-01
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