文摘
Spectrum absorption optical fiber gas sensor has characteristics such as high measuring resolution, high precision and good gas differential ability when it is applied on gas measurement. As ideal illuminant and key component, the research of DFBLD seems especially important. Constant current driving and constant temperature controlling techniques are adopted on DFBLD to make the central wavelength of it accurately point at detected gas absorption. Theory analysis and experiment results indicate that the optical fiber gas sensor based on DFBLD has specified detecting precision and resolution.