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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Development of a broadband superluminescent diode based on self-assembled InAs quantum dots and demonstration of high-axial-resolution optical coherence tomography imaging
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Development of a broadband superluminescent diode based on self-assembled InAs quantum dots and demonstration of high-axial-resolution optical coherence tomography imaging

机译：基于自组装INA量子点的宽带超发光二极管的开发及高轴分辨率光相干断层扫描成像的演示

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We developed a near-infrared (NIR) superluminescent diode (SLD) based on self-assembled InAs quantum dots (QDs) and demonstrated high-axial-resolution optical coherence tomography (OCT) imaging using this QD-based SLD (QD-SLD). The QD-SLD utilized InAs QDs with controlled emission wavelengths as a NIR broadband light emitter, and a tilted waveguide with segmented electrodes was prepared for edge-emitting broadband electroluminescence (EL) spanning approximately 1-1.3 mu m. The bandwidth of the EL spectrum was increased up to 144 nm at a temperature of 25 degrees C controlled using a thermoelectric cooler. The inverse Fourier transform of the EL spectrum predicted a minimum resolution of 3.6 mu m in air. The QD-SLD was subsequently introduced into a spectral-domain (SD)-OCT setup, and SD-OCT imaging was performed for industrial and biological test samples. The OCT images obtained using the QD-SLD showed an axial resolution of similar to 4 mu m, which was almost the same as that predicted from the spectrum. This axial resolution is less than the typical size of a single biological cell (similar to 5 mu m), and the practical demonstration of high-axial-resolution OCT imaging shows the application of QD-SLDs as a compact OCT light source, which enables the development of a portable OCT system.
机译：我们开发了基于自组装的INAS量子点（QDS）的近红外（NIR）超级发光二极管（SLD），并使用该基于QD的SLD（QD-SLD）显示高轴分辨率光学相干断层扫描（OCT）成像。利用具有受控发射波长的QD-SLD作为NIR宽带光发射器的QD，以及具有分段电极的倾斜波导，用于跨越大约1-1.3μm的边缘发射宽带电致发光（EL）。使用热电冷却器，在25摄氏度的温度下，EL光谱的带宽高达144nm。 EL光谱的逆傅里叶变换预测空气中的最小分辨率为3.6μm。随后将QD-SLD引入光谱结构域（SD）-OCT设置中，对工业和生物测试样品进行SD-OCT成像。使用QD-SLD获得的OCT图像显示出类似于4μm的轴向分辨率，其几乎与从光谱预测的相同。这种轴向分辨率小于单一生物细胞的典型尺寸（类似于5μm），高轴向分辨率OCT成像的实际演示显示QD-SLD作为紧凑型OCT光源的应用，这使得能够实现开发便携式OCT系统。

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