Chinese Journal of Lasers, Volume. 36, Issue s2, 296(2009)
Methane Sensing Characteristics of Fiber-Core Mismatched Methane Sensor Based on Cryptophane E
In order to develop a methane sensor with low-cost and excellent sensitive characteristics,a fiber-core mismatched type methane sensor based on Cryptophane E was designed. The sensitivity of the fiber-core mismatched methane sensor with different lengths of Cryptophane E coating to various concentration mixed methane gas was measured. Optical power versus injection angle for the methane sensor with the best sensitive coating length in pure nitrogen and 12% mixed methane gas were measured respectively. In order to find out the best injection angle,the difference of optical power in pure nitrogen and 12% mixed methane gas were calculated as well. Results showed that the best sensitive coating length is 3 mm,and the maximum optical power difference emerges when the injection angle is at θ=1°. The lowest detection limit of the fiber-core mismatched methane sensor is 2.3%. The optical power increases with the increasing of methane gas concentration.
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Zhang Jun, Li Xueming, Zhao Na, Fu Yinhui, Wang Xinjun. Methane Sensing Characteristics of Fiber-Core Mismatched Methane Sensor Based on Cryptophane E[J]. Chinese Journal of Lasers, 2009, 36(s2): 296
Category: Optical communication
Received: --
Accepted: --
Published Online: Dec. 30, 2009
The Author Email: Jun Zhang (zhangjun.3151028@163.com)