基于反射型时分复用的激光器波长调制解调的设计

Design of Laser Wavelength Modulation Based on Reflective TDM

该文基于一种反射型的时分复用气体检测模型,该模型首次使用单根光纤完成了多点的气体体积分数检测,针对该模型设计了一种适用于多点检测的高频脉冲光源驱动及调制解调电路,该设计方案适用于基于光纤的时分复用多点谐波检测。实验证明,在保证能够对准吸收峰情况下,该调制解调方案具有高的线性度,并且满足稳定度的要求。

In this paper,a new gas detection model based on reflective time-division multiplexing（ TDM） is designed. The model take use of a single fiber bring less attenuation,measurement range and accuracy are improved at the same time.A high-frequency light source driving circuit suitable for multi-point detection is also designed according to this model. Experiments show that the gas output concentration has a high linearity and stability in the case of ensuring that the absorption peak can be aligned.