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.