Q-switched laser combined with electric-optic modulator and GaAs saturable absorber
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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。Abstract: In order to study the symmetry of Q-switched laser pulse,combined with a electric-optic(EO) 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 Q-switched process of the laser,and the numerical solution accords well with the experimental results.
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Keywords:
- laser technique /
- double Q-switched /
- pulse width /
- pulse symmetry /
- numerical solution
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