Abstract The objective of this paper is to fabricate a flexible mid-infrared (IR) light delivery system with bioprobesince remarkable biological effect of mid-IR light and lack of corresponding technical devices. Hollow optical fiber with sealing window of different materials and shapes was fabricated and packaged within a metal tube for delivering mid-IR light and electrical signal. The thickness of the sealing window was optimized consideringmechanical strength, loss, and power density threshold. A bioprobe with a SMA connector was manufactured. A patch cord loaded with low-loss mid-IR hollow optical fiber was prepared and can be connected to the bioprobeby a standard SMA jointer. The loss of the bioprobe was 1.38 dB and 1.07 dB at the wavelength of 5.1 μm and 10.6 μm, respectively. The output beam of the bioprobe can be controlled by sealing windows of different shapes, which had a far-field half divergence angle of 0.03–0.44 rad. The system had a power density threshold of 382 mW/mm2 and a loss of 3.44 dB at 10.6 μm. A light delivery system with bioprobe was manufactured, which provided a photoelectric device for the application of mid-IR light in the field of neuroscience. The presented system is of high efficiency electro-optic transmission and of high power density threshold, and the applicable wavelength can be extended to far-IR and terahertz by changing the fabrication process of hollow optical fiber.

中文翻译：

---

用于光束控制的带有生物探针的柔性中红外光传输系统的开发

摘要 由于中红外光的生物效应显着，但缺乏相应的技术设备，本文的目的是制造一种具有生物探针的灵活的中红外（IR）光传输系统。具有不同材料和形状的密封窗口的中空光纤被制造并封装在金属管内，用于传输中红外光和电信号。考虑到机械强度、损耗和功率密度阈值，优化了密封窗口的厚度。制造了带有 SMA 连接器的生物探针。准备了一根装有低损耗中红外空心光纤的跳线，可以通过标准的 SMA 接头连接到生物探针。生物探针在 5.1 μm 和 10.6 μm 波长处的损耗分别为 1.38 dB 和 1.07 dB。生物探针的输出光束可以通过密封不同形状的窗口来控制，其远场半发散角为 0.03-0.44 rad。该系统的功率密度阈值为 382 mW/mm2，10.6 μm 处的损耗为 3.44 dB。制造了带有生物探针的光传输系统，为中红外光在神经科学领域的应用提供了光电器件。所提出的系统具有高效电光传输和高功率密度阈值，通过改变中空光纤的制造工艺可以将适用波长扩展到远红外和太赫兹。制造了带有生物探针的光传输系统，为中红外光在神经科学领域的应用提供了光电器件。所提出的系统具有高效电光传输和高功率密度阈值，通过改变中空光纤的制造工艺可以将适用波长扩展到远红外和太赫兹。制造了带有生物探针的光传输系统，为中红外光在神经科学领域的应用提供了光电器件。所提出的系统具有高效电光传输和高功率密度阈值，通过改变中空光纤的制造工艺可以将适用波长扩展到远红外和太赫兹。