Chen He, Chen Sheng-Ping, Jiang Zong-Fu, Hou Jing
Opt Express. 2014 Nov 3;22(22):26449-56. doi: 10.1364/OE.22.026449.
We demonstrate nanosecond scale rectangular wave-breaking-free pulse generation in an actively mode locked Yb-doped fiber laser based on a combined action of active periodic cavity loss modulation and nonlinear polarization rotation effect. The pulse width of the laser can be controlled in the range of 890 ps to above 124 ns instantaneously by adjusting the electrical signal applied on the modulator. As high as 19.8 nJ wave-breaking-free pulse is achieved with maximum available pump power. The output pulse temporal dynamics exhibit various distinct characteristics under different modulation and polarization control. The laser presents unusually flexible tunabilities in pulse width, pulse energy and pulse shape.
我们展示了基于有源周期性腔损耗调制和非线性偏振旋转效应的联合作用，在主动锁模掺镱光纤激光器中产生纳秒级无波破裂矩形脉冲。通过调整施加在调制器上的电信号，激光器的脉冲宽度可在890皮秒至124纳秒以上的范围内瞬间控制。在最大可用泵浦功率下实现了高达19.8纳焦的无波破裂脉冲。在不同的调制和偏振控制下，输出脉冲的时间动态表现出各种不同的特性。该激光器在脉冲宽度、脉冲能量和脉冲形状方面具有异常灵活的可调性。
