Test-bed Dataset for Optical-Based In-Body Communications Research

This dataset contains measurement data from a test-bed specifically for optical-based in-body communication research. The dataset includes three files: a free-space channel, an optical phantom, and biological tissues using a fresh pork meat sample in an ex-vivo experiment. The data (in .xlsx format) presents the impact of controlling the Near-infrared LED's current and adjusting the photodetector's gain setting on the received optical power. In this dataset, two types of receivers were used for the mentioned test bed: an optical power meter and a photodetector module. The optical power meter can be controlled manually for its attenuation, but in this dataset, we used two settings: 0 dB and -4.30 dB to match the photodetector reading. The measurement using a photodetector amplifier module was obtained by extracting the photodetector's output voltage read from the oscilloscope based on the provided datasheet. However, it should be normalized by multiplying it with a specific value. The optical power meter is a NIST-calibrated device dedicated to measuring absolute optical power. Then, the photodetector module, as a device for comparison, is typically used for detecting light and is employed to receive optical signals. Here, we used it as a device to measure relative optical power by extracting its voltage output to optical power in a watt unit. The free space test comprises 5 cm, 7.5 cm, 10 cm, 12.5 cm, and 15 cm of optical distance. The test with samples involved tissue-mimicking phantom (human soft tissue) and actual biological tissues, i.e., pork meat samples containing fat, muscle, and bone. This dataset provides valuable information regarding the standardized test-bed for researchers working in optical-based in-body communication studies, especially when using the near-infrared spectrum 810 nm, which was considered good for penetrating the human body. It is expected that this dataset will also be a good reference for researchers working on Optical Wireless Power Transfer (OWPT) in a free-space setting or through the human body.本数据集收录专为光基体内通信研究设计的测试平台所产生的测量数据。数据集包含三类文件，分别对应自由空间信道、光学仿体，以及离体实验中采用新鲜猪肉样本的生物组织场景。本次数据以.xlsx格式存储，展示了近红外发光二极管（Near-infrared LED）电流调控与光电探测器（photodetector）增益参数调整对接收光功率的影响。本测试平台采用两类接收设备：光功率计（optical power meter）与光电探测器模块。光功率计的衰减参数可手动调控，本数据集中共采用0 dB与-4.30 dB两种设置，以匹配光电探测器的读数。光电探测器放大模块的测量数据，是依据配套数据手册，从示波器读取并提取光电探测器输出电压后得到的，但该数据需通过乘以特定系数完成归一化处理。光功率计为经美国国家标准与技术研究院（National Institute of Standards and Technology, NIST）校准的专用设备，用于测量绝对光功率。而作为对照设备的光电探测器模块，通常用于光信号检测与接收。本研究中，我们通过提取其电压输出并转换为瓦级光功率，将其用于相对光功率的测量。自由空间测试场景涵盖5 cm、7.5 cm、10 cm、12.5 cm及15 cm共5种光传输距离。样本测试场景则包含组织模拟仿体（人体软组织）与真实生物组织，即含脂肪、肌肉及骨骼的猪肉样本。本数据集为从事光基体内通信研究的科研人员提供了标准化测试平台的宝贵参考数据，尤其针对采用810 nm近红外光谱的场景——该波段被认为具备良好的人体穿透能力。同时，本数据集也可为从事光无线电力传输（Optical Wireless Power Transfer, OWPT）研究，且涉及自由空间或体内传输场景的科研人员提供有效参考。