Limitation of the achievable signal-to-noise ratio in optical coherence tomography due to mismatch of the balanced receiver.
Limitation of the achievable signal-to-noise ratio in optical coherence tomography due to mismatch of the balanced receiver.
复制标题
由于平衡接收器的不匹配，光学相干断层扫描中可实现的信噪比受到限制。
DOI：
10.1364/ao.43.004802
复制
发表时间：
2004
期刊：
影响因子：
1.9
通讯作者：
A. Podoleanu
中科院分区：
文献类型：
--
作者：
C. Rosa;A. Podoleanu
由于平衡光学相干断层扫描配置中使用的光纤定向耦合器的光谱响应有限，两个输出的光谱不同。这对平衡光电检测器单元的操作产生不利影响。与具有平坦光谱响应的定向耦合器相比，过多的光子噪声的贡献更大。开发的理论模型表明可以定义一组最佳参数来最大化可实现的信噪比。该模型重新定义了有效噪声带宽，其中考虑了所用定向耦合器的非平坦响应。该模型还预测，即使干涉仪中的杂散反射率为零，信噪比也会受到限制。
Owing to the limited spectral response of the fiber directional coupler used in a balanced optical coherence tomography configuration, the spectra are different in the two outputs. This affects unfavorably operation of the balanced photodetector unit. Excess photon noise makes a larger contribution than a directional coupler with a flat spectral response. A theoretical model is developed that shows that an optimum set of parameters may be defined to maximize the achievable signal-to-noise ratio. The model leads to a redefinition of the effective noise bandwidth, which takes into account the nonflat response of the directional coupler used. The model also predicts a limitation on the signal-to-noise ratio even when the stray reflectances in the interferometer are brought to zero.
影响因子：
82.9
作者：
Drexler, W;Morgner, U;Fujimoto, JG
通讯作者：
Fujimoto, JG