输出高重复频率脉冲列的D型双包层掺Yb3+光纤放大器

利用5 m长的D型双包层掺Yb3 光纤,采用声光调制锁模信号系统,实验上成功研制出输出320 MHz的高重复频率脉冲列的光纤放大器,得到了20 dB的增益输出,输出激光波长1064 nm,输出平均功率1.02 W,该光纤放大器可作为空间激光通信系统发射源.整个实验系统装置由作为信号源的特高重频脉冲列激光器、作为放大环节的光纤放大器和绿光倍频三个部分组成,另外对光纤放大器自激振荡谱线的各影响因素做了一些相关的实验研究,并对结果进行了分析讨论,提出了改进措施.

Study on double-claded Yb3+-doped fiber amplifier

Using the AOM active mode-locked Nd:YVO4 laser signal light system and a Yb3 -doped D-shape double-clad fiber, a fiber amplifier is setup which has a 320 MHz laser pulse output. The fiber amplifier has a 20 dB signal gain output at 1064 nm, with the average power 1.02 W. It can be used in free-space laser communication system as emission head. The experiment is composed by the high repetition frequency mode-locked laser as signal light, the Yb3 -doped fiber for amplifier, and double frequency green light. At the same time, some influence factors of self oscillation spectrum of the fiber amplifier system are investigated. At last, the experimental results are analysed and discussed, and the improving measures for the system put forward.