基于压电陶瓷闭环控制的线性可调谐环形腔光纤激光器  

Linear Tunable Fiber Ring Laser Based on Closed-Loop Piezoelectric ceramics

作　　者：李国玉[1] 杨康[1] 贾素梅[1] 李燕[1] 刘明生[1] 

机构地区：[1]邯郸学院信息技术研究所,河北邯郸056005

出　　处：《光学学报》2015年第6期180-184,共5页Acta Optica Sinica

基　　金：国家自然科学基金(60807033);河北省应用基础研究计划重点基础研究项目(13960306D);校级基金(13207)

摘　　要：提出了一种基于压电陶瓷闭环控制的线性可调谐环形腔光纤激光器。光纤激光器环形腔结构中光纤光栅固定在压电陶瓷上,通过控制压电陶瓷改变光纤光栅波长,从而改变环形腔光纤激光器的波长,构成基于压电陶瓷的可调谐环形腔光纤激光器。应变传感器贴附在压电陶瓷上,实时监测压电陶瓷的步长变化,通过惠斯顿桥式电路反馈给驱动控制系统,并补偿和修正压电陶瓷固有的磁滞和蠕变特性,形成压电陶瓷闭环控制系统。实验结果表明基于压电陶瓷闭环控制的可调谐环形腔光纤激光器调谐线性度好,波长调谐范围可达0.9 nm,线宽为4 k Hz,波长稳定性为±0.01 nm,功率稳定性为±0.3 d B。The linearity tunable fiber ring laser based on closed-loop piezoelectric ceramics （PZT） is proposed. The fiber Bragg grating （FBG） of the ring cavity is fixed on the PZT, the wavelength of FBG changes with controlling the PZT, which leads to the wavelength change of fiber ring laser, so the tunable fiber ring laser based on PZT is realized. The strain sensor attached on the PZT is monitoring the step change of the PZT real-timely, reporting to the PZT driver system, compensating and rectifying the inherent hysteresis and creep through the Wheatstone bridge, so the tunable fiber ring laser based on closed-loop PZT is achieved. Experimental results show that the tuning curve of the fiber ring laser is linear with the tuning range nearly of 0.9 nm and the linewidth nearly of 4 KHz. Furthermore, the wavelength fluctuations of the tunable fiber ring laser are kept within ±0.01 nm, and the power variation is kept within ±0.3 dB.

关 键 词：激光器 光纤环形腔激光器 可调谐 光纤布拉格光栅 

分 类 号：TN248.1[电子电信—物理电子学]