论文部分内容阅读
为了实现激光可调谐和高稳定性运行,在Mach-Zehnder(M-Z)滤波结构的掺铒光纤激光器的基础上,通过采用电动光学延迟线(Optical Delay Line,ODL)来改变M-Z滤波器的透射光谱间隔长度,从而实现了激光器的可调谐输出。对激光器的工作原理和设计方案进行了理论分析,实验上采用长度8m的掺铒光纤作为激光增益介质和用于提高激光器稳定性的光纤子腔结构,在工作波长为976nm泵浦源的激励下,得到激光器的室温阈值功率为54m W;当泵浦功率为60m W时,通过调节偏振控制器(Polarization Controller,PC),实现了在1558nm至1568nm范围内波长灵活可调,并且获得了7个边模抑制比均大于40d B单波长激光的可切换输出,线宽均小于0.1nm。在30分钟内没有出现明显跳模现象,波长漂移范围小于0.1nm,功率波动低于2d B。
Based on the Erbium-doped fiber laser with Mach-Zehnder (MZ) filter structure, the optical transmission line (ODL) is used to change the transmission spectrum of the MZ filter for laser tunable and high-stability operation. The length of the gap allows for a tunable output of the laser. The working principle and design scheme of the laser are theoretically analyzed. The experiment uses the erbium-doped fiber with a length of 8m as the laser gain medium and the optical fiber sub-cavity structure for improving the stability of the laser. Under the excitation of a pump source with a working wavelength of 976nm, , The threshold power of the laser at room temperature is 54mW. When the pump power is 60mW, the Polarization Controller (PC) is used to adjust the wavelength in the range of 1558nm to 1568nm, and seven Side mode suppression ratio is greater than 40d B single-wavelength laser switchable output, line width are less than 0.1nm. No obvious mode hopping phenomenon occurred within 30 minutes, the wavelength drift range was less than 0.1nm and the power fluctuation was less than 2d B.