Acta Optica Sinica, Vol. 34, Issue 2, 223002 (2014)
Research on LED Effect in Spatial Scanning Optical Fiber Fabry-Perot Sensing Demodulation System
Junfeng Jiang1,2,*, Fan Wu1,2, Tiegen Liu1,2, Kun Liu1,2, Shuang Wang1,2, Jinde Yin1,2, Zunqi Qin1,2, Shengliang Zou1,2, and Xuezhi Zhang1,2
- 1[in Chinese]
- 2[in Chinese]
The impact of optical source on the accuracy in recovery monochromatic frequency absolute phase demodulation algorithm for optical fiber Fabry-Perot sensor is studied in this paper. The relationship between phase demodulation value changes and the output spectrum of optical source is discussed both in theoretical aspect and demodulation experiment. Results show that the demodulating error has a relationship with the light source optical power. When the temperature changes from low to high, the source spectrum′s redshift causes pressure demodulation value error. The demodulation results show a quadratic relationship with various central wavelength of optical source, which is consisted with the theoretical analysis. Within the pressure range of 140 kPa, the central wavelength fluctuation of light source should be lower than 1.79nm when 0.1% demodulation error is needed.
Please Enter Your Email: