基于FPGA的光学微腔生物传感器控制系统

摘要

为了促进光学微腔生物传感技术向集成化、智能化和小型化发展,提出了一种基于现场可编程门阵列(FPGA)的数字辅助控制系统.系统通过三角波信号驱动可调谐激光器进入连续扫描模式,周期性扫描光学微腔谐振波长,得到激光中心波长信号的偏移量,从而得到光学微腔的灵敏度.设计了控制系统的硬件电路及软件辅助程序.经实验验证表明:控制系统实现了光学微腔生物传感器的数据采集处理以及对激光器的调谐.%In order to promote integration,intelligence and miniaturization of optical microcavity biosensing technology,a digital auxiliary control system based on field programmable gate array(FPGA)is proposed. The tunable laser is driven by the triangular wave signal to work in continuous sweep mode. Offset of laser center wavelength signal is obtained by periodically scanning the resonance wavelength of the optical microcavity. According to the offset of the wavelength,the sensitivity of optical microcavity is achieved. The hardware and software of the optical biosensor control system are designed. By experimental verification,the control system can realize data acquisition processing of optical microcavity biosensor and tuning of laser.