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科学应用国际公司的工程技术人员与加利福尼亚大学及AT＆T贝尔实验室的研究人员合作研制出一种传感器,这种传感器能够远距离监测活动车辆内空气的酒精含量。这种酒精分析仪基于波长调制光谱学,并且采用III-V族分配反馈可调单模二极管激光器在1.392μm波长范围内监测酒精的吸收。在操作中,二极管激光器的注入电流受到正弦调制,导致激光器的输出在酒精的吸收线上进行扫描。激光器的输出穿过活动车辆的驾驶室,并且在车辆的另一侧得到探测。当
Engineers at Scientific Applied International worked with researchers at the University of California and AT & T Bell Laboratories to develop a sensor that remotely monitors the airborne alcohol content of active vehicles. The alcohol analyzer is based on wavelength modulation spectroscopy and monitors the absorption of alcohol in the 1.392 μm wavelength range using a III-V family of distributed feedback-adjustable single-mode diode lasers. In operation, the injection current of the diode laser is sinusoidally modulated, causing the output of the laser to be swept across the absorption line of alcohol. The output of the laser passes through the cab of a moving vehicle and is detected on the other side of the vehicle. when