论文部分内容阅读
为给密集波分复用(DWDM)光纤通信及光纤传感系统提供理想光源,设计了一种双波长环形腔掺铒光纤激光器。该激光器采用单支光纤光栅(FBG)和2个3dB耦合器构成可调谐光滤波器,结合多模光纤的偏振烧孔效应,通过改变系统的偏振态来获得波长可调谐的双波长激光输出。实验结果表明:改变系统的偏振态时,可分别获得单波长和双波长激光输出,双波长光纤激光器的最大波长差为4.692nm。引入多模光纤后,激光跳模现象得到明显抑制。
In order to provide an ideal light source for dense wavelength division multiplexing (DWDM) optical fiber communication and optical fiber sensing system, a dual-wavelength annular cavity erbium-doped fiber laser is designed. The laser uses a single fiber grating (FBG) and two 3dB couplers to form a tunable optical filter. Combining with the polarization hole burning effect of multimode fiber, the wavelength tunable dual wavelength laser output can be obtained by changing the polarization state of the system. The experimental results show that the single-wavelength and dual-wavelength laser output can be obtained when the polarization state of the system is changed. The maximum wavelength difference of the dual-wavelength fiber laser is 4.692 nm. The introduction of multimode fiber, the laser mode hopping phenomenon was significantly inhibited.