An Innovative Gas Sensor with On-Chip Reference Using Monolithic Twin Laser  

作　　者：张永刚 田招兵 张晓钧 顾溢 李爱珍 祝向荣 郑燕兰 刘盛 

机构地区：[1]State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050

出　　处：《Chinese Physics Letters》2007年第10期2839-2841,共3页中国物理快报（英文版）

摘　　要：An innovative gas sensor with on-chip reference using a monolithic twin laser is proposed. In this sensor a monolithic twin laser generates two closer laser beams with slight different wavelengths alternatively, one photodiode is used to catch both absorption and reference signals by time division multiplexing. The detection of nitrous oxide adopting this scheme using a 2.1 I^m antimonide laser and an InGaAs photodiode has been demonstrated experimentally with detection limit below i ppm. Using this on chip reference scheme the fluctuations from the optical path and devices can be compensated effectively; the sensor system is simplified distinctly.An innovative gas sensor with on-chip reference using a monolithic twin laser is proposed. In this sensor a monolithic twin laser generates two closer laser beams with slight different wavelengths alternatively, one photodiode is used to catch both absorption and reference signals by time division multiplexing. The detection of nitrous oxide adopting this scheme using a 2.1 I^m antimonide laser and an InGaAs photodiode has been demonstrated experimentally with detection limit below i ppm. Using this on chip reference scheme the fluctuations from the optical path and devices can be compensated effectively; the sensor system is simplified distinctly.

关 键 词：QUANTUM CASCADE LASERS 2.1 MU-M DIODE-LASERS SEMICONDUCTOR-LASERS MQWLASERS ANTIMONIDE TUNABILITY 

分 类 号：O46[理学—电子物理学]