新型钒酸盐混晶Nd∶Gd0.42Y0.58VO4/Cr4+∶YAG被动调Q锁模特性研究

卓壮; 姜其畅; 苏艳丽; 李涛; 李健

中国激光, 2005, 32 (10): 1429, 网络出版: 2006-06-01

新型钒酸盐混晶Nd∶Gd_0.42Y_0.58VO₄/Cr⁴⁺∶YAG被动调Q锁模特性研究

Study for Cr⁴⁺∶YAG Passively Q-Switched Mode-Locking Properties of a New Mixed Vanadate Crystal Nd∶Gd_0.42Y_0.58VO₄

论文大纲

卓壮 ^1,2,*姜其畅 ¹苏艳丽 ¹李涛 ¹李健 ¹

作者单位

¹ 山东师范大学物理与电子科学学院,山东济南 250014

² 山东大学山大鲁能信息科技有限公司,山东济南 250100

摘要

研究了Nd∶Gd0.42Y0.58VO4混晶的激光运转特性。采用Cr4+∶YAG晶体作为被动可饱和吸收体,实现了Nd∶Gd0.42Y0.58VO4混晶的调Q锁模激光运转。实验测量了不同Cr4+∶YAG初始透过率情况下激光器的输出特性。在Cr4+∶YAG初始透过率T0=86.3%,输出镜透过率T=10%时,调Q锁模运转阈值为2.8 W,随着抽运功率的增加,调制深度逐渐加大。采用透过率T=20%的输出镜,注入抽运功率10.3 W时,调Q锁模深度约为70%,相应的脉冲包络重复频率为40 kHz,半高宽度为25 ns,平均输出功率为2.58 W,光-光转换效率为25%。

Abstract

Passively Q-switched mode-locking Nd∶Gd0.42Y0.58VO4 laser is studied with Cr4+∶YAG as saturable absorbers. The output performance of lasers is tested for the Cr4+∶YAG at different transmission. At the initial transmission T0=86.3% for Cr4+∶YAG and the output transmission of 10% for the output coupler, the threshold power of Q-switching mode locking (QML) is 2.8 W. The modulation depth is enlarged with the increase of incident pump power. At the output transmission T=20% and 10.3 W of the incident pump power, Q-switching mode-locking pulse with modulation depth about 70% is available, and the Q-switching envelope trains with the repetition rate of 40 kHz and the pulse duration of 25 ns are obtained, the average output power and the optical to optical conversion efficiency reach 2.58 W and 25%, respectively.

参考文献

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卓壮, 姜其畅, 苏艳丽, 李涛, 李健. 新型钒酸盐混晶Nd∶Gd_0.42Y_0.58VO₄/Cr⁴⁺∶YAG被动调Q锁模特性研究[J]. 中国激光, 2005, 32(10): 1429. 卓壮, 姜其畅, 苏艳丽, 李涛, 李健. Study for Cr⁴⁺∶YAG Passively Q-Switched Mode-Locking Properties of a New Mixed Vanadate Crystal Nd∶Gd_0.42Y_0.58VO₄[J]. Chinese Journal of Lasers, 2005, 32(10): 1429.

新型钒酸盐混晶Nd∶Gd_0.42Y_0.58VO₄/Cr⁴⁺∶YAG被动调Q锁模特性研究

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