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基于微流控技术提出了一种新型可调光衰减器核心芯片结构,利用微流体和可压缩空气实现光衰减的可控调节,并基于此核心芯片设计了两种应用不同驱动技术的微流控光衰减器。通过高斯光束传播理论、亥姆霍兹方程、光场耦合理论与Mathematics软件分析了光衰减器内部光场分布特性,考虑了流体端面衍射影响,给出了流体端面位置与衰减量的关系及响应时间等性能参数。理论表明基于微流控技术的可调光衰减器衰减范围大于50dB,系统响应时间约为0.01s,具有衰减范围大、响应快、插入损耗小、回波损耗大的优点。所提出的光衰减器为寻求小体积、高性能、易集成、灵活可调的新型光通讯器件提供了新的思路。
A new type of tunable optical attenuator core chip structure is proposed based on microfluidic technology. Microfluid and compressible air are used to realize the controllable adjustment of optical attenuation. Based on the core chip, two kinds of microfluidic devices with different driving technologies are designed Controlled optical attenuator. The internal light field distribution characteristics of the optical attenuator are analyzed by Gaussian beam propagation theory, Helmholtz equation, light field coupling theory and Mathematics software. The relationship between the fluid end position and the attenuation is given considering the diffraction effect of the fluid end face. Time and other performance parameters. The theory shows that the attenuation range of the tunable optical attenuator based on microfluidics is more than 50dB and the system response time is about 0.01s. It has the advantages of large attenuation range, fast response, small insertion loss and large return loss. The proposed optical attenuator provides a new idea for seeking a new type of optical communication device with small size, high performance, easy integration and flexibility.