摘要
为了研究调Q激光脉冲波型的对称性,利用电光调制和GaAs半导体饱和吸收体,实现了电光-GaAs主被动双调Q激光运转。与单一电光主动调Q或GaAs被动调Q激光对比,双调Q激光的脉冲宽度更窄、脉冲波型更对称,其脉冲宽度的压缩比大于40%。定义了一个对称因子来描述脉冲波型的对称性,对称性的改善优于10%。在平面波近似下,给出了双调Q激光运转的耦合方程组,数值求解方程组得到的理论值与实验结果相符。
In order to study the symmetry of Q-switched laser pulse,combined with a electric-optic （E0） modulator and a GaAs saturable absorber, an active-passive Q-switched laser is realized. Especially, the more symmetric and shorter pulse is generated in comparison with only EO-active or GaAs-passive Q-switched laser. The compressed ratio is higher than 40%. In addition,a symmetric factor is defined to describe the temporal symmetry of the pulses and the improvement of the pulsed symmetry is higher than 10%. The coupled rate equations under the plane-wave approximation are used to simulate the Qswitched process of the laser,and the numerical solution accords well with the experimental results.
出处
《激光技术》
CAS
CSCD
北大核心
2008年第2期204-206,共3页
Laser Technology
基金
国家自然科学基金资助项目(60578010)
山东省自然科学基金资助项目(Y2005G10)
关键词
激光技术
双调Q
脉冲宽度
脉冲对称性
数值解
laser technique
double Q-switched
pulse width
pulse symmetry
numerical solution
