[1] Stuar A D, Samson P J. Optrode Sensors for Carbon Monoxide and Relative Humidity[A]. Proc. 13th Australian Conference on Optical Fibre Technology[C]. Hobart, Australia:[sn], 1988. 4-7.
[2] Uehara K, Tai H. Remote Detection Of Methane With A 1.66μm Diode Laser[J]. Applied Optics, 1992, 31(6): 809-814.
[5] Jin W, Stewart M, Culshaw B. Absorption Measurement of Methane Gas Using a Broad Light Source and Interferometric Signal Processing[J]. Optics Letters, 1993, 18(16): 1364-1366.