针对光纤法布里-珀罗传感器受到温度、压力等作用会使正交工作点发生漂移的问题,提出一种负反馈的方法使正交工作点输出稳定.通过扫描波长找到正交工作点,使用找到的电流重新设置激光器,将外界变化引起的正交工作点变化引入到温度负反馈控制系统中,使温度控制激光器的输出波长,设计了基于负反馈的稳定正交工作点系统.通过温度变化3℃,设计的稳定正交工作点系统能够使正交工作点稳定地输出,从而验证了系统设计的正确性.%Aiming at the problem that the fiber Fabry-Perot sensor is affected by temperature and pressure and the quadrature point (Q) is drifted,a negative feedback method is proposed to stabilize the output of the Q point.The Q point is found by scanning wavelength,the laser is reset by using the found current,and the change of the Q point caused by the external variation is introduced into the temperature negative feedback control system,making the output wavelength of laser controlled by temperature,thus a stable Q point system based on negative feedback is designed.The stable Q point system can stabilize the output of the Q point through the temperature variation of 3 degrees,thus verifying the correctness of the designed system.
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