Double-crystal LiTaO3 electro-optic Q-switch with excellent performances

IF 2 3区物理与天体物理 Q3 OPTICS Applied Physics B Pub Date : 2024-10-23 DOI:10.1007/s00340-024-08345-3

Ji-Fang Shang, Qing-Lian Li, Ning-Zhe Niu, Hao-Zhe Yang, Fu-Xiao Zhang, Shi-Hao Dong, Ling Chen, Wen-Jing Du

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Abstract

We prepared a double-crystal LiTaO₃ (LT) electro-optic (EO) Q-switch and investigated its overall Q-switching performances. The LT EO Q-switch is fabricated from two x-cut LT crystals to utilize the maximum effective EO coefficient. The static and dynamic quarter-wave voltage were measured to be 1200 V and 950 V respectively, which are both considerably lower than those of other commercial EO Q-switches. Besides, the LT Q-switch can operate at a wide temperature range with high temperature stability. The dynamic-to-static ratios at sub-freezing temperatures were up to 80 percent of that at room temperature. Furthermore, the piezoelectric ringing in the LT Q-switch was found to be comparable to that of RTP Q-switches, and it had been successfully operated at a repetition rate of 1 kHz with stable Q-switched laser output. The only disadvantage is the low extinction ratio which is mainly caused by the optical inhomogeneity and can be improved by improving the optical quality of LT crystals. The double-crystal LT EO Q-switches are particularly attractive for Q-switched lasers because of their excellent comprehensive performances.

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性能卓越的双晶 LiTaO3 光电 Q 开关

我们制备了双晶 LiTaO3（LT）电光（EO）Q 开关，并对其整体 Q 开关性能进行了研究。LT EO Q 开关由两个 x 切面 LT 晶体制成，以利用最大的有效 EO 系数。测得的静态和动态四分之一波电压分别为 1200 V 和 950 V，均大大低于其他商用环氧乙烷 Q 开关。此外，LT Q 开关可以在很宽的温度范围内工作，具有很高的温度稳定性。亚冰点温度下的动静比高达室温下的 80%。此外，LT 调 Q 开关的压电振铃与 RTP 调 Q 开关相当，它已成功地以 1 kHz 的重复频率工作，并具有稳定的调 Q 激光输出。唯一的缺点是消光比低，这主要是由光学不均匀性引起的，可以通过提高 LT 晶体的光学质量来改善。双晶 LT EO Q 开关因其出色的综合性能而对 Q 开关激光器特别具有吸引力。

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来源期刊

Applied Physics B 物理-光学

CiteScore

4.00

自引率

4.80%

发文量

202

审稿时长

3.0 months

期刊介绍： Features publication of experimental and theoretical investigations in applied physics Offers invited reviews in addition to regular papers Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more 94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field. In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.