Study on a new type of electro-optical Q-switch of Langasite crystal

Yunfeng Ding; Liang Qiao; Zhi Diao; Haorui Xie; Zhe Jia; Yeqiu Li

doi:10.1117/12.667163

23 December 2005 Study on a new type of electro-optical Q-switch of Langasite crystal

Yunfeng Ding, Liang Qiao, Zhi Diao, Haorui Xie, Zhe Jia, Yeqiu Li

Proceedings Volume 6028, ICO20: Lasers and Laser Technologies; 60280Y (2005) https://doi.org/10.1117/12.667163
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

A new type of electro-optical Q-switch of Langasite (La₃Ga₅SiO₁₄,LGS) single crystal is introduced in this paper. LGS has been used as a type of piezoelectric crystal for a long time. It has attracted much attention due to its low acoustic velocity, zero temperature. We make a kind of electro-optical Q-switch of LGS single crystal by using its typically optical activity. LGS is compared with a common type of electric-optical crystal DKDP and LN. LGS has some characteristics that DKDP and LN don't have. For example, LGS is non-deliquescent and can be exposed in the air. It can be coated on the end faces. This helps to increase the transmissivity obviously. But DKDP is deliquescent. The packaging technologies are more complex. The application of DKDP is inconvenient. The anti-damaged threshold of LGS is about 900 MW/cm². It is much higher than LN. A new set of experimental system was developed based on the characteristics of LGS, including Pockels' cell for LGS driving circuit, Q-switch circuit, etc. The detailed experimental data and oscillograms with this system is got and practical conclusion is made from the experiment. Due to the particular characters of LGS, it has vast application, especially in military realm.

Citation Download Citation

Yunfeng Ding, Liang Qiao, Zhi Diao, Haorui Xie, Zhe Jia, and Yeqiu Li "Study on a new type of electro-optical Q-switch of Langasite crystal", Proc. SPIE 6028, ICO20: Lasers and Laser Technologies, 60280Y (23 December 2005); https://doi.org/10.1117/12.667163

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KEYWORDS

Crystals

Electro optics

Pulsed laser operation

Q switching

Q switch crystals

Switching

Modulation

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