Abstract
An electro-optical modulator was introduced to modulate the continuous light wave into pulses. An unbalance Michelson scanning interferometer was employed to transform the wavelength-shift signal reflected by the Bragg gratings to phase-shift signal. Signal coming from each sensor element was selected by controlling the on-off state of an electrical switch with a programmable delay signal generator and, therefore interrogation for time-domain addressing was achieved. Filtered with a band-pass filter, the measured can be judged by monitoring the phase-shift with a phase meter. Experiment demonstrated that the sensitivity of the 4-element sensor system, which was with a resolution of 6 nε, was 1.63 Deg/με.
Original language | Chinese (Simplified) |
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Pages (from-to) | 845-848 |
Number of pages | 4 |
Journal | Zhongguo Jiguang/Chinese Journal of Lasers |
Volume | 28 |
Issue number | 9 |
Publication status | Published - 1 Sept 2001 |
Keywords
- Fiber Bragg grating
- Information processing
- Sensor array
- Time-domain addressing
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering