【摘要】 采用线阵InGaAs光电二极管阵列和体相位光栅并结合空分复用和波分复用技术,对光纤光栅传感进行解调.设计了基于线阵InGaAs光电二极管阵列和体相位光栅的光纤光栅传感解调系统,通过系统测试和性能分析,该解调系统解调带宽42 nm,信噪比30 dB,波长偏移测量精确度±15 pm,功率测量精确度为±0 .3 dB.基于线阵InGaAs光电二极管阵列和体相位光栅的光纤光栅解调系统不但尺寸小,功耗低,而且具有较高的解调速度.更多还原

【Abstract】 Based on the linear indium gallium arsenide (InGaAs) photodiode array and volume phase grating (VPG), a interrogative system of the fiber Bragg grating (FBG) sensors is designed by use of the wavelength division multiplexing (WDM) and spatial division multiplexing (SDM) technology. The performance tests show that the interrogation system can be used to interrogate the FBG sensor array with wavelength bandwidth 42 nm,SNR of 30 dB, wavelength shift accuracy of ±15 pm and power accuracy of about ±0.3 dB. The interrogative system has small size, and high interrogation speed, and it shows a good prospect.更多还原