Discretely swept optical coherence tomography system using super-structure grating distributed Bragg reflector lasers at 1561-1639nm
Discretely swept optical coherence tomography system using super-structure grating distributed Bragg reflector lasers at 1561-1639nm
复制标题
使用1561-1639nm超结构光栅分布式布拉格反射激光器的离散扫描光学相干断层扫描系统
DOI：
10.1117/12.905413
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Kohji Ohbayashi
中科院分区：
文献类型：
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作者：
Donghak Choi;Reiko Yoshimura; Hideaki Hiro-Oka; Hiroyuki Furukawa; Atsushi Goto;Nobuyuki Satoh;Akihito Igarashi;Motoi Nakanishi;Kimiya Shimizu;Kohji Ohbayashi
我们研制了一种基于光学梳状扫频光源的扫频光源光学相干层析成像系统。扫频光源系统包括两个覆盖1561-1693 nm波长范围的超结构光栅分布式布拉格反射器激光器。解释了扫描这些激光器以获得没有这些激光器固有的拼接噪声的干涉信号以及连接两个激光器而没有级联噪声的方法。根据光学梳扫激光OCT系统中光学混叠噪声的特点，阐述了降低光学混叠噪声的方法。通过降低这些噪声，实现了124 dB的灵敏度。A型扫描频率为3.1kHz，分辨率为16 μm（空气中），深度范围为12 mm。两个选定的样品证明了深入到组织中的成像渗透。
We have developed swept source optical coherence tomography (OCT) system with an optical comb swept source system. The swept source system comprised of two super-structured grating distributed Bragg reflector lasers covering a wavelength range from 1561-1693 nm. A method to scan these lasers to obtain an interference signal without stitching noises, which are inherent in these lasers, and to connect two lasers without concatenation noise is explained. Method to reduce optical aliasing noises in this optical comb swept laser OCT is explained and demonstrated based on the characteristic of the optical aliasing noises in this particular OCT system. By reduction of those noises, a sensitivity of 124 dB was realized. The A-scan rate, resolution and depth range were 3.1 kHz, 16 μm (in air) and 12 mm, respectively. Deep imaging penetration into tissue is demonstrated for two selected samples.