Blind dispersion compensation for optical coherence tomography

基于光子盲源分离的实时动态串扰跟踪与补偿

Real-Time Dynamic Crosstalk Tracking and Compensation via Photonic Blind Source Separation

该研究结合硅光子处理器与FPGA控制后端，通过光子盲源分离实现少模光纤传输中动态模间串扰的实时跟踪补偿，维持低误码率与低延迟，为高速IM/DD空分复用链路提供实用方案。

Depth Compensated Spectral Domain Optical Coherence Tomography via Digital Compensation

Spectral Domain Optical Coherence Tomography (SD-OCT) is a well-known imaging modality which allows for \textit{in-vivo} visualization of the morphology of different biological tissues at cellular level resolutions. The overall SD-OCT imaging quality in terms of axial resolution and Signal-to-Noise Ratio (SNR) degrades with imaging depth, while the lateral resolution degrades with distance from the focal plane. This image quality degradation is due both to the design of the SD-OCT imaging system and the optical properties of the imaged object. Here, we present a novel Depth Compensated SD-OCT …

非线性干涉仪中的色散：对未检测光子的光学相干层析成像的影响

Dispersion in nonlinear interferometry: implications for optical coherence tomography with undetected photons

本文提出了一种基于时域模态的新型数值补偿方法，用于改善非线性干涉仪中色散对光学相干层析成像的影响，提升了轴向分辨率和成像性能。

Optical Incoherence Tomography: a method to generate tomographic retinal cross-sections with non-interferometric imaging systems

Optical tomographic cross-sectional images of biological samples were made possible by interferometric imaging techniques such as Optical Coherence Tomography (OCT). Owing to its unprecedented view of the sample, OCT has become a gold standard, namely for human retinal imaging in the clinical environment. In this Letter, we present Optical Incoherence Tomography (OIT): a completely digital method extending the possibility to generate tomographic retinal cross-sections to non-interferometric imaging systems such as en-face AO-ophthalmoscopes. We demonstrate that OIT can be applied to different …

Ultrahigh-speed optical coherence tomography based on a 100 MHz and 100 nm swept source

We demonstrate an ultrahigh-speed optical coherence tomography (OCT) based on a 100 MHz swept source (SS). An all polarization-maintaining figure-9 mode-locked fiber laser is used as the seed laser. After nonlinear spectral expansion in an Erbium-doped fiber amplifier, a flat top spectrum with respectively 1-dB and 10-dB bandwidths of 73.7 nm and 106 nm is obtained. The broadband femtosecond pulse is time stretched to a swept signal in a section of dispersion compensation fiber with a total dispersion of -84 ps/nm. With the swept source, the axial resolution of the SS-OCT is measured to be 21 …

Neural network-based image reconstruction in swept-source optical coherence tomography using undersampled spectral data

Optical Coherence Tomography (OCT) is a widely used non-invasive biomedical imaging modality that can rapidly provide volumetric images of samples. Here, we present a deep learning-based image reconstruction framework that can generate swept-source OCT (SS-OCT) images using undersampled spectral data, without any spatial aliasing artifacts. This neural network-based image reconstruction does not require any hardware changes to the optical set-up and can be easily integrated with existing swept-source or spectral domain OCT systems to reduce the amount of raw spectral data to be acquired. To sh…