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论文类型：期刊论文

发表时间：2009-12-01

发表刊物：Guangxue Xuebao/Acta Optica Sinica

收录刊物：EI、PKU、ISTIC、Scopus

卷号：29

期号：SUPPL. 2

页面范围：346-350

ISSN号：02532239

摘要：Optical wavelength sensing interrogator based on hydrogen cyanide (HCN) gas absorption cell and tunable fiber laser are researched, besides, high performance simultaneous sampling card is used in the system to acquire sensing signals of six channels simultaneously. The absorption wavelengths of HCN spectrum are identified followed by the recognizing two absorption wavelengths with maximum spacing, thus high-resolution and real-time calibration of sweep-wavelength can be achieved, which can eliminate the fiber Fabry-P  rot tunable filter (FFP-TFs) disadvantages such as non linearity and poor repeatability. Experimental results show that the resolution of the system is 1.6 pm and the long-term repeatability is 3.4 pm for fiber Bragg grating measurement, which means that high resolution wavelength demodulation can be achieved with the scheme.