摘要
增益开关和Q开关是获得脉冲激光运转的常用方法,对于在非线性光学研究、光通讯第二窗口装置检测、光纤传感等方面有着广泛应用前景的1.3μm波段全固体激光的脉冲产生,提出了使用增益开关的方法。首先在理论上使用速率方程对增益开关的运转进行分析,并就腔长对脉冲参数的影响进行了数值模拟。接着在实验上采用高频调制激光二极管供电电源的方法,使Nd:YVO_4激光器工作在增益开关状态,即通过逐渐减小工作电源泵浦电流的脉冲宽度,使激光仅输出弛豫振荡的第一个脉冲,最后在泵浦电流脉冲宽度为5μs时,获得了平均功率80 mW,光脉冲宽度200 ns,频率200 kHz,峰值功率2 W,单脉冲能量0.4μJ的1.342μm激光的增益开关运转。
Gain-switching and Q-switching are usual methods to obtain pulsed laser operation. For 1.3 μm wave band pulsed laser which is widely used in nonlinear optics, detection device used for optical communication second window and fiber sensor etc, gain-switching method is put forward to obtain the pulsed operation. Firstly, rate equation for the gain-switching is used to analyze the operation of laser. And the numerical simulation shows influence of the cavity length to pulse parameters. Secondly, the driver of LD is modulated to pump Nd：YVO4 laser working in the state of gain-switching. By decreasing the pulse width of the pumping current, the first pulse of relaxation is picked up. The 1.342 μm pulse with average power of 80 mW, pulse width of 200 ns, frequency of 200 kHz, peak power of 2 W and pulse energy of 0.4 μJ is obtained at last.
出处
《量子电子学报》
CAS
CSCD
北大核心
2012年第3期292-297,共6页
Chinese Journal of Quantum Electronics
基金
北京理工大学珠海学院青年教师科研发展基金(ky-2010-0016)资助项目
