一种具有激光光源的高灵敏光电传感器的设计

Design of high sensitive photoelectric transducer with laser source

为解决现有普通光源的比色分光光度计的结构复杂、灵敏度低的问题，设计了一种包括激光光源、激光衰减器、样品流通池和光电转换系统的高灵敏激光流通检测耜，通过对多个不同波长的半导体激光二极管进行筛选，设计了一种在可见光范围内（500～800nm）进行波长分段调谐且性能稳定的激光光源。并成功地用于电厂炉水和给水中痕量硅的快速测定，硅酸根检出限达到1．13μg／L。

To refrain from the complex construction and low sensitivity of the spectrophotometric detector, a high sensitive laser flow detector including laser source, attenuator, flow cell and photoelectric sensor is design. A new type of laser source which is reliable and whose wavelengh can be tuned in range of 500～800 nm is designed through the optimization of different wavelength semiconductor laser diode. It is successfully used to determine the ppb-level silicate in boiler water and feedwater at power plants. The silicate detection limit measures up to 1.13 μg/L.