Tuning of successively scanned two monolithic Vernier-tuned lasers and selective data sampling in optical comb swept source optical coherence tomography.
Tuning of successively scanned two monolithic Vernier-tuned lasers and selective data sampling in optical comb swept source optical coherence tomography.
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连续扫描的两个单片游标调谐激光器的调谐以及光梳扫频源光学相干断层扫描中的选择性数据采样。
DOI：
10.1364/boe.4.002962
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发表时间：
2013
影响因子：
3.4
通讯作者：
K. Ohbayashi
中科院分区：
文献类型：
--
作者：
D. Choi;R. Yoshimura;K. Ohbayashi
单片游标调谐超结构光栅分布式布拉格反射器（SSG-DBR）激光器有望成为扫频光源光学相干层析成像（SS-OCT）最有前途的光源之一，具有长相干长度，降低灵敏度滚降，并具有非常快的A扫描速率的潜在能力。然而，激光器的先前实现遭受四个主要问题：1）频率在扫描时偏离目标值，2）大量噪声出现与注入电流的突变相关联，3）光学混叠噪声由于长相干长度而出现，以及4）单个芯片的窄波长覆盖限制分辨率。我们已经开发了一种方法的动态频率调谐，一种方法的选择性数据采样，以消除电流开关噪声，干涉仪，以减少混叠噪声，和一个多余的噪声无连接的两个串行扫描激光器，以提高分辨率，以解决这些问题。通过对两个SSG-DBR激光器进行离散扫描，获得了灵敏度为124 dB，动态范围为55-72 dB的光学频率梳SS-OCT系统，其取决于深度，A扫描速率为3.1 kHz，分辨率为15 μm，L波段（1.560-1.599 μm）和UL波段（1.598-1.640 μm）。获得了一些具有良好图像穿透深度的OCT图像。
Monolithic Vernier tuned super-structure grating distributed Bragg reflector (SSG-DBR) lasers are expected to become one of the most promising sources for swept source optical coherence tomography (SS-OCT) with a long coherence length, reduced sensitivity roll-off, and potential capability for a very fast A-scan rate. However, previous implementations of the lasers suffer from four main problems: 1) frequencies deviate from the targeted values when scanned, 2) large amounts of noise appear associated with abrupt changes in injection currents, 3) optically aliased noise appears due to a long coherence length, and 4) the narrow wavelength coverage of a single chip limits resolution. We have developed a method of dynamical frequency tuning, a method of selective data sampling to eliminate current switching noise, an interferometer to reduce aliased noise, and an excess-noise-free connection of two serially scanned lasers to enhance resolution to solve these problems. An optical frequency comb SS-OCT system was achieved with a sensitivity of 124 dB and a dynamic range of 55-72 dB that depended on the depth at an A-scan rate of 3.1 kHz with a resolution of 15 μm by discretely scanning two SSG-DBR lasers, i.e., L-band (1.560-1.599 μm) and UL-band (1.598-1.640 μm). A few OCT images with excellent image penetration depth were obtained.
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影响因子：
3.8
作者：
Tsai TH;Zhou C;Adler DC;Fujimoto JG
通讯作者：
Fujimoto JG
影响因子：
3.4
作者：
Grulkowski I;Liu JJ;Potsaid B;Jayaraman V;Lu CD;Jiang J;Cable AE;Duker JS;Fujimoto JG
通讯作者：
Fujimoto JG
影响因子：
3.8
作者：
Sharma U;Chang EW;Yun SH
通讯作者：
Yun SH
影响因子：
3.8
作者：
Potsaid B;Baumann B;Huang D;Barry S;Cable AE;Schuman JS;Duker JS;Fujimoto JG
通讯作者：
Fujimoto JG
影响因子：
3.6
作者：
de Boer, JF;Cense, B;Bouma, BE
通讯作者：
Bouma, BE