Strain Multipoint Measurements Based on Chirped Bragg Grating Sensors

• 出 处: 稀有金属材料与工程
• 发表日期: 2006年S3期
• 关键词: Bragg multiplexing grating Strain tunable addressing length tradeoff modulator d

In this paper,we propose the novel system of multipoint measurement.The sensors of measurements are chirped Bragg grating and the interrogation of sensors is sub-carrier phase.The wavelength division multiplexing technique is used for addressing a network of FBG sensors and the time-division multiplexing technique is used for multipoint measurements.In the system,the modulation frequency of 200 MHz is adopted.The range of dectetion is from 0 to 900μεand the resolution is 12με. The time of the sensor response is about 1ns.

In this paper, we propose the novel system of multipoint measurement. The sensors of measurements are chirped Bragg grating and the interrogation of sensors is sub-carrier phase. The wavelength division multiplexing technique is used for addressing a network of FBG sensors and the time- division multiplexing technique is used for multipoint measurements.In the system, the modulation frequency of 200 MHz is adopted. The range of dectetion is from 0 to 900μεand the resolution is 12με. The time of the sensor response is about 1ns.