Design of Demodulation System of Interferometric Sensor Based on Labview

• 出 处: Semiconductor Photonics and Technology
• 发表日期: 2008年02期
• 关键词: demodulation coupler asymmetric symmetric automatically arithmetic directional i

For the modified demodulation arithmetic of 3×3 coupler, the processing software built on the basis of Labview is able to demodulate asymmetric 3×3 coupler signal and do further spectrum analysis. It shows that the measured frequency ranges from 10 Hz to 1 000 Hz and phase range is covered by -10 rad~10 rad. The phase sensitivity is 0.5 V/rad. This system is proved to show high resolution and wide dynamic range.

For the modified demodulation arithmetic of 3 × 3 coupler, the processing software built on the basis of Labview capable to demodulate asymmetric 3 × 3 coupler signal and do further spectrum analysis. It shows that the measured frequency ranges from 10 Hz to 1 000 Hz and phase range is covered by -10 rad ~ 10 rad. The phase sensitivity is 0.5 V / rad. This system is proved to show high resolution and wide dynamic range.