Q-switched laser combined with electric-optic modulator and GaAs saturable absorber

SUN Kai-ying; ZHAO Sheng-zhi; LI Gui-qiu; YANG Ke-jian

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.

Corresponding author: ZHAO Sheng-zhi, shengzhi_zhao@sdu.edu.cn;

1. School of Information Engineering, Shandong University at Weihai, Weihai 264209, China;

2. School of Information Science and Engineering, Shandong University, Ji'nan 250100, China

Received Date: 2007-01-29

Accepted Date: 2007-03-16

Available Online: 2008-04-25

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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Reference (14)

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Q-switched laser combined with electric-optic modulator and GaAs saturable absorber

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References

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