Detection of gaseous elemental mercury using a frequency-doubled green diode laser

作者：Lou, Xiutao^*; Zhang, Tie; Lin, Hongze; Gao, Shiyi; Xu, Lianjie; Wang, Junnan; Wan, Li; He, Sailing

来源：Optics Express, 2016, 24(24): 27509-27520.

DOI：10.1364/OE.24.027509

• MULTIMODE ABSORPTION-SPECTROSCOPY
• ATMOSPHERIC MERCURY
• GAS-CHROMATOGRAPHY
• ATOMIC MERCURY
• LIDAR SYSTEM
• 253.7 NM
• SENSOR
• AIR
• GENERATION
• POWER

We demonstrate a second-harmonic-generation (SHG) based method for the detection of gaseous elemental mercury by using a newly available green diode laser. Multimode ultraviolet radiation at 253.7 nm is generated through a process of SHG. Correlation spectroscopy is introduced into the scheme to guarantee the measurement accuracy. The limit of detection achieved is 0.6 mu g/m(3) (0.07 ppb) for 1-m pathlength and 10-s integration time. The measurement accuracy is estimated to be 1.2%. The linear response range is estimated to be 0 similar to 60 mu g/m(2) (6.7 ppb.m), within which the linearity error is less than 1%. Real-time monitoring of mercury volatilization is demonstrated with a time resolution of 1 s. The results of performance characterization show that the proposed method has great potentials for mercury sensing in environmental and industrial fields.

• 出版日期2016-11-28
• 单位浙江大学; 哈尔滨工业大学