论文标题
光谱域光学相干断层扫描的量子启发检测
Quantum-inspired detection for Spectral Domain Optical Coherence Tomography
论文作者
论文摘要
安全标准（ANSI或ICNIRP）允许的强度水平限制了可在临床环境中使用的光量，以形象具有光学相干断层扫描（OCT）的高度散射或吸收组织。为了在低强度水平下实现高敏化成像，我们将检测方案（用于量子光学器件中用于提供有关光子光谱相关性的信息）中的检测方案为标准光谱域OCT系统。该检测方案基于分散傅立叶变换的概念，其中纤维引入了由单像素检测器（通常是高速光接种器）测量的波长依赖性时间延迟。在这里，我们使用快速的超导单光子检测器（SSPD）作为单像素检测器，并在10 pw的强度水平下获得玻璃堆栈和洋葱切片的图像。我们还为在这种检测方案中提供了一个依赖深度依赖性灵敏度的公式，该方案可以视为基于衍射刺激的光谱仪的时间等效物。
The intensity levels allowed by safety standards (ANSI or ICNIRP) limit the amount of light that can be used in a clinical setting to image highly scattering or absorptive tissues with Optical Coherence Tomography (OCT). To achieve high-sensitivity imaging at low intensity levels, we adapt a detection scheme -- which is used in quantum optics for providing information about spectral correlations of photons -- into a standard spectral domain OCT system. This detection scheme is based on the concept of Dispersive Fourier Transformation, where a fibre introduces a wavelength-dependent time delay measured by a single-pixel detector, usually a high-speed photoreceiver. Here, we use a fast Superconducting Single-Photon Detector (SSPD) as a single-pixel detector and obtain images of a glass stack and a slice of onion at the intensity levels of the order of 10 pW. We also provide a formula for a depth-dependent sensitivity fall-off in such a detection scheme which can be treated as a temporal equivalent of diffraction-grating-based spectrometers.
