声光偏转快调谐脉冲CO<sub>2</sub> 器实验研究 -

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声光偏转快调谐脉冲CO₂ 器实验研究

doi:10.3788/CO.20191202.0355

潘其坤^{1, 2,,},
俞航航^{2, 3},
陈飞^{1, 2},
谢冀江²,
何洋²,
于德洋²,
张阔²

1.
解放军电子工程学院脉冲功率技术国家重点实验室, 安徽合肥 230037
2.
中国科学院长春光学精密机械与物理研究所与物质相互作用国家重点实验室, 吉林长春 130033
3.
中国科学院大学, 北京 100049

基金项目:

脉冲功率技术国家重点实验室开放基金项目SKL2015KF08

国家自然科学基金项目61675200

中国科学院青年创新促进会资助，吉林省中青年科技创新领军人才团队项目20170519012JH

详细信息

作者简介:
潘其坤(1985-), 男, 河南开封人, 博士, 副研究员, 2014年于中国科学院大学获得博士学位, 主要从事中红外器及其应用方面的研究。E-mail:panqikun2005@163.com

中图分类号:TN248.5
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出版历程
- 收稿日期:2018-06-11
- 修回日期:2018-07-13
- 刊出日期:2019-04-01

Experimental research on acousto-optic deflection rapid tuning pulsed CO₂lasers

PAN Qi-kun^{1, 2,,},
YU Hang-hang^{2, 3},
CHEN Fei^{1, 2},
XIE Ji-jiang²,
HE Yang²,
YU De-yang²,
ZHANG Kuo²

1.
State Key Laboratory of Pulsed Laser Technology, Electronic Engineering Institute, Hefei 230037, China
2.
State Key Laboratory of Laser Interaction with Matter, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
3.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds:

Foundation of State Key laboratory of Pulsed Laser TechnologySKL2015KF08

National Natural Science Foundation of China61675200

Youth Innovation Promotion Association CAS, Youth and Middle-aged Science and Technology Innovation Leader and Team Project in Jilin Province20170519012JH

More Information

Corresponding author:PAN Qi-kun, E-mail:panqikun2005@163.com

摘要

摘要:采用双声光调制器光路快速偏转技术与自准直光栅法实现CO ₂ 全波段快调谐同光路输出。首先对声光调制器特性进行实验研究，结果显示：声光调制器偏转角度约为4.4°，与运用布拉格方程计算结果相符；且单次通过声光调制器移频量为40.68 MHz，与声光驱动器射频频率一致，将往返多次经声光调制器的移频量叠加。进而，开展基于声光调制器的CO ₂ 快调谐实验研究，运用两个对称布置的同驱动频率声光调制器补偿声光移频，实现偏转光路振荡输出，运用光栅法在直线光路中实现全波段可调谐输出。最终，在声光调制器时序控制下，实现双波长快调谐同光路输出，选定波长的切换时间约为1 ms，脉宽小于300 ns，且双波长切换速度不受CO ₂ 跃迁谱带的限制。
- CO₂ 器/
- 快调谐/
- 声光调制器/
- 光栅
Abstract:A rapid tuning pulsed CO ₂laser is presented using a blazed grating system and a pair of acousto-optic modulators. Firstly, the characteristics of acousto-optic modulators were studied through experimentation. The results showed that the deflection angle of the acousto-optic modulator was approximately 4.4°, which was in agreement with the calculations of the Bragg equation. When a single laser passed the acousto-optic modulator, the shift in frequency was approximately 40.68 MHz, which was in agreement with the acousto-optic driving frequency. In addition, when multiple lasers passed through the acousto-optic modulator, the shift in frequency was compounded. Based on the acousto-optic modulator results, experimental research was performed on rapid tuning pulsed CO ₂lasers. In order to offset the shift in acousto-optic frequency, two acousto-optic modulators were placed symmetrically in the deflected optical beam, and a laser output was obtained. Using a blazed grating, a full band tunable output laser was obtained in the linear optical beam. Finally, under sequential control of double acousto-optic modulators, a double wavelength laser with rapid tuning output and a common optical axis was obtained. The tuning time of the pulsed laser was approximately 1 ms, which pulsed at a width of less than 300 ns. The tuning speed of the pulsed laser was independent of the transition band of the CO ₂laser.
- CO₂laser/
- rapidly tunable/
- acousto-optic modulator/
- grating

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图 1 偏转测量装置

Figure 1.Setup for laser deflection measurement

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图 2快速傅立叶分析频谱图

Figure 2.FFT analytical spectra

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图 3快调谐脉冲CO₂ 器实验装置

Figure 3.Experimental device of rapidly tunable pulsed CO₂laser

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图 4声光调制器时序控制示意图

Figure 4.Schematic of sequential control of the acousto-optic modulator

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图 5CO₂ 双谱线

Figure 5.Double lines of CO₂laser

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图 6双波长器快调谐波形

Figure 6.Rapidly tunable waveform of double wavelength laser

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图 7 脉冲宽度

Figure 7.Laser pulse width

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