利用掺Yb3+的光子晶体光纤作为光纤放大器的增益介质,采用反向抽运方式,分别从理论和实验方面研究了不同信号的增益特性,在信号光功率为6 W,抽运光功率为160 W时,获得了104 W的输出功率.实验发现,当抽运功率大于一定值时,放大器输出会有一定的不稳定性,并影响输出功率的进一步提高. Using the Yb3 + -doped photonic crystal fiber as the gain medium of the fiber amplifier, the gain of the different signals is studied theoretically and experimentally by using the reverse pumping method. When the signal power is 6 W and the pumping power is 160 W , The output power of 104 W was obtained.The experimental results show that when the pumping power is greater than a certain value, the output of the amplifier will have some instability and affect the further improvement of the output power.