Opt Lett. 2020 Apr 15;45(8):2339-2342. doi: 10.1364/OL.390345.
We propose and experimentally demonstrate high-speed single-pixel imaging by integrating frequency-division multiplexing and time-division multiplexing (techniques used widely in telecommunications) and applying the combined technique, namely, frequency-time-division multiplexing (FTDM), to optical imaging. Specifically, FTDM single-pixel imaging uses an array of broadband, spatially distributed, dual-frequency combs (i.e., spatial dual combs) for multidimensional illumination and detects an image-encoded time-domain signal with a single-pixel photodetector in a FTDM manner. As a proof-of-principle demonstration, we use the method to show ultrafast two-color (bright-field and fluorescence) single-pixel microscopy of breast cancer cells at a high frame rate of 32,000 fps and ultrafast image velocimetry of fluorescent particles flowing at a high speed of ${ \gt }{2};{\rm m/s}$>2m/s.
我们提出并实验证明了通过集成频分复用和时分复用（在电信中广泛使用的技术）并应用组合技术，即频分时分复用（FTDM），可以实现高速单像素成像。具体来说，FTDM 单像素成像使用一组宽带、空间分布的双频梳（即空间双梳）进行多维照明，并以 FTDM 方式用单个像素光电探测器检测图像编码的时域信号。作为原理验证演示，我们使用该方法以 32000 fps 的高帧率显示乳腺癌细胞的超快双色（明场和荧光）单像素显微镜和高速荧光粒子以 2m/s>2m/s 的速度流动的高速图像测速。
